{"id":55570,"date":"2025-08-14T00:45:37","date_gmt":"2025-08-13T16:45:37","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/55570.html"},"modified":"2025-08-14T00:45:37","modified_gmt":"2025-08-13T16:45:37","slug":"javaweb%e4%bb%8e%e5%85%a5%e9%97%a8%e5%88%b0%e7%b2%be%e9%80%9a%ef%bc%81%e7%ac%ac%e4%b8%89%e5%a4%a9%ef%bc%81mvc%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f%e5%92%8cservlet%e8%bf%87%e6%bb%a4%e5%99%a8%e5%92%8c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/55570.html","title":{"rendered":"JavaWeb\u4ece\u5165\u95e8\u5230\u7cbe\u901a\uff01\u7b2c\u4e09\u5929\uff01(MVC\u8bbe\u8ba1\u6a21\u5f0f\u548cServlet\u8fc7\u6ee4\u5668\u548c\u76d1\u542c\u5668)"},"content":{"rendered":"<\/p>\n

\u4e8c\u3001Servlet \u8fc7\u6ee4\u5668<\/h3>\n

1. \u5f15\u5165<\/p>\n

\u6709\u65f6\u5019\u6211\u4eec\u53ea\u5e0c\u671b\u7ba1\u7406\u5458\u624d\u80fd\u767b\u5f55\u7279\u5b9a\u7684 jsp \u9875\u9762，\u6700\u597d\u5c31\u662f\u5728\u8bbf\u95ee\u8be5\u9875\u9762\u4e4b\u524d\u5bf9\u6240\u6709\u8bf7\u6c42\u8fdb\u884c\u8fc7\u6ee4，\u53ea\u6709\u5177\u6709\u6743\u9650\u7684\u7528\u6237\u624d\u80fd\u8bbf\u95ee，Servlet \u8fc7\u6ee4\u5668\u5c31\u53ef\u4ee5\u5b9e\u73b0\u8be5\u529f\u80fd（\u9274\u6743）\u3002<\/p>\n

2. Servlet \u8fc7\u6ee4\u5668<\/p>\n

\u8fc7\u6ee4\u5668\u80fd\u591f\u5bf9\u5230\u8fbe Servlet \u5bb9\u5668\u7684\u8bf7\u6c42\u548c\u54cd\u5e94\u8fdb\u884c\u68c0\u67e5\u548c\u4fee\u6539，\u63d0\u4f9b\u8fc7\u6ee4\u7684\u529f\u80fd<\/p>\n

3. \u8fc7\u6ee4\u5668\u4f18\u70b9<\/p>\n

（1）\u53ef\u4ee5\u68c0\u67e5\u548c\u4fee\u6539 ServletRequest \u548c ServletResponse<\/p>\n

（2）\u53ef\u4ee5\u6307\u5b9a\u548c\u67d0\u4e2a URL \u5173\u8054，\u53ea\u6709\u5ba2\u6237\u7aef\u8bbf\u95ee\u8be5 URL \u65f6，\u624d\u4f1a\u89e6\u53d1\u8fc7\u6ee4\u5668<\/p>\n

（3）\u8fc7\u6ee4\u5668\u53ef\u4ee5\u88ab\u4e32\u8054，\u5f62\u6210\u7ba1\u9053，\u534f\u540c\u5de5\u4f5c\u6765\u4fee\u6539\u8bf7\u6c42\u548c\u54cd\u5e94\u5bf9\u8c61\u3002<\/p>\n

4. \u8fc7\u6ee4\u5668\u5de5\u4f5c\u539f\u7406\u56fe<\/p>\n

\"\"<\/p>\n

5. \u8fc7\u6ee4\u5668\u8fd8\u53ef\u4ee5\u4e32\u8054\u8d77\u6765<\/p>\n

\"\"<\/p>\n

6. \u81ea\u5b9a\u4e49\u8fc7\u6ee4\u5668：\u9700\u8981\u5b9e\u73b0 javax.servlet.Filter \u63a5\u53e3<\/p>\n

6.1 \u6ce8\u89e3\u65b9\u5f0f<\/p>\n

UserFilter.java：<\/p>\n

package com.edu.ctrl;<\/p>\n

import java.io.IOException;<\/p>\n

import javax.servlet.Filter;
\nimport javax.servlet.FilterChain;
\nimport javax.servlet.FilterConfig;
\nimport javax.servlet.ServletException;
\nimport javax.servlet.ServletRequest;
\nimport javax.servlet.ServletResponse;
\nimport javax.servlet.annotation.WebFilter;
\nimport javax.servlet.annotation.WebInitParam;<\/p>\n

\/\/\u5b9a\u4e49 UserFilter \u8981\u62e6\u622a\u7684 URL \u5730\u5740，\u8fd9\u91cc\u7684"\/*"\u8868\u793a\u62e6\u622a\u6240\u6709\u7684\u8bf7\u6c42\u548c\u54cd\u5e94，\u5e76\u8bbe\u7f6e\u4e86\u521d\u59cb\u5316\u53c2\u6570
\n@WebFilter(value = "\/*", initParams = {@WebInitParam(name="param", value = "UserFilter \u7684\u521d\u59cb\u5316\u53c2\u6570")})
\npublic class UserFilter implements Filter{
\n\u00a0\u00a0 \u00a0\/\/\u8fc7\u6ee4\u5668\u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570
\n\u00a0\u00a0 \u00a0public UserFilter() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated constructor stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("UserFilter \u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570");
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0 * \u521d\u59cb\u5316\u65b9\u6cd5，\u5b8c\u6210\u521d\u59cb\u5316\u5de5\u4f5c，\u5728\u8fc7\u6ee4\u5668\u5b9e\u4f8b\u521b\u5efa\u65f6\u8c03\u7528\u4e00\u6b21，config \u53c2\u6570\u548c Servlet \u4e00\u6837，\u53ef\u4ee5\u8bfb\u53d6\u521d\u59cb\u5316\u53c2\u6570
\n\u00a0\u00a0 \u00a0 *\/
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void init(FilterConfig config) throws ServletException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("UserFilter \u7684 init() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String initParameter = config.getInitParameter("param");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("\u521d\u59cb\u5316\u53c2\u6570：" + initParameter);
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0 * \u6838\u5fc3\u62e6\u622a\u65b9\u6cd5，\u6bcf\u6b21\u5ba2\u6237\u7aef\u53d1\u9001\u8bf7\u6c42\u5230\u670d\u52a1\u5668\u7684\u65f6\u5019，\u670d\u52a1\u5668\u90fd\u4f1a\u8c03\u7528\u4e00\u6b21\u8be5\u65b9\u6cd5\u6765\u5bf9\u539f\u751f\u7684\u8bf7\u6c42\u548c\u54cd\u5e94\u5bf9\u8c61\u8fdb\u884c\u68c0\u67e5，
\n\u00a0\u00a0 \u00a0 * \u5176\u4e2d\u53c2\u6570：request：\u539f\u751f\u8bf7\u6c42\u5bf9\u8c61，response：\u539f\u751f\u7684\u54cd\u5e94\u5bf9\u8c61，\u7b2c\u4e09\u4e2a\u53c2\u6570 FilterChain，\u5305\u542b\u4e00\u4e2a doFilter()，\u8c03\u7528
\n\u00a0\u00a0 \u00a0 * \u8be5\u53c2\u6570\u7684 doFilter() \u53ef\u4ee5\u653e\u884c\u8bf7\u6c42\u548c\u54cd\u5e94，\u5426\u5219\u5c31\u662f\u62e6\u622a
\n\u00a0\u00a0 \u00a0 *\/
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0throws IOException, ServletException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("UserFilter \u7684 doFilter() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0chain.doFilter(request, response);\/\/\u653e\u884c\u8bf7\u6c42\u548c\u54cd\u5e94
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\/\/UserFilter \u88ab\u9500\u6bc1\u7684\u65f6\u5019\u8c03\u7528\u7684\u65b9\u6cd5
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void destroy() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("UserFilter \u7684 destroy() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0}
\n}<\/p>\n

\u6d4b\u8bd5：<\/p>\n

\u5148\u4e0d\u8981\u8bf7\u6c42\u4efb\u4f55\u8d44\u6e90，\u542f\u52a8\u670d\u52a1\u5668\u5373\u53ef：<\/p>\n

\"\"<\/p>\n

\u670d\u52a1\u5668\u5728\u542f\u52a8\u7684\u65f6\u5019，\u8fc7\u6ee4\u5668\u5c31\u88ab\u5b9e\u4f8b\u5316\u548c\u521d\u59cb\u5316\u4e86\u3002<\/p>\n

\u7136\u540e\u6211\u4eec\u968f\u4fbf\u8bbf\u95ee\u4efb\u4f55\u4e00\u4e2a\u8d44\u6e90：<\/p>\n

\"\"<\/p>\n

\u4ece\u4e0a\u9762\u7ed3\u679c\u53ef\u77e5，\u8fc7\u6ee4\u5668\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u5728\u670d\u52a1\u5668\u542f\u52a8\u7684\u65f6\u5019\u5c31\u88ab\u5b9e\u4f8b\u5316\u548c\u521d\u59cb\u5316\u4e86，\u7136\u540e\u5ba2\u6237\u7aef\u6bcf\u6b21\u8bf7\u6c42\u7684\u65f6\u5019，\u8fc7\u6ee4\u5668\u7684doFilter()\u65b9\u6cd5\u90fd\u4f1a\u88ab\u8c03\u7528\u4e00\u6b21，\u901a\u8fc7 FilterChain \u53c2\u6570\u662f\u5426\u8c03\u7528\u4e86 doFilter() \u65b9\u6cd5\u6765\u51b3\u5b9a\u662f\u653e\u884c\u8fd8\u62e6\u622a\u3002<\/p>\n

6.2 \u914d\u7f6e\u65b9\u5f0f<\/p>\n

UserFilter \u5220\u9664\u6ce8\u89e3\u914d\u7f6e:<\/p>\n

package com.edu.ctrl;<\/p>\n

import java.io.IOException;<\/p>\n

import javax.servlet.Filter;
\nimport javax.servlet.FilterChain;
\nimport javax.servlet.FilterConfig;
\nimport javax.servlet.ServletException;
\nimport javax.servlet.ServletRequest;
\nimport javax.servlet.ServletResponse;
\nimport javax.servlet.annotation.WebFilter;
\nimport javax.servlet.annotation.WebInitParam;<\/p>\n

public class UserFilter implements Filter{
\n\u00a0\u00a0 \u00a0\/\/\u8fc7\u6ee4\u5668\u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570
\n\u00a0\u00a0 \u00a0public UserFilter() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated constructor stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("UserFilter \u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570");
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0 * \u521d\u59cb\u5316\u65b9\u6cd5，\u5b8c\u6210\u521d\u59cb\u5316\u5de5\u4f5c，\u5728\u8fc7\u6ee4\u5668\u5b9e\u4f8b\u521b\u5efa\u65f6\u8c03\u7528\u4e00\u6b21，config \u53c2\u6570\u548c Servlet \u4e00\u6837，\u53ef\u4ee5\u8bfb\u53d6\u521d\u59cb\u5316\u53c2\u6570
\n\u00a0\u00a0 \u00a0 *\/
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void init(FilterConfig config) throws ServletException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("UserFilter \u7684 init() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String initParameter = config.getInitParameter("param");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("\u521d\u59cb\u5316\u53c2\u6570：" + initParameter);
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0 * \u6838\u5fc3\u62e6\u622a\u65b9\u6cd5，\u6bcf\u6b21\u5ba2\u6237\u7aef\u53d1\u9001\u8bf7\u6c42\u5230\u670d\u52a1\u5668\u7684\u65f6\u5019，\u670d\u52a1\u5668\u90fd\u4f1a\u8c03\u7528\u4e00\u6b21\u8be5\u65b9\u6cd5\u6765\u5bf9\u539f\u751f\u7684\u8bf7\u6c42\u548c\u54cd\u5e94\u5bf9\u8c61\u8fdb\u884c\u68c0\u67e5，
\n\u00a0\u00a0 \u00a0 * \u5176\u4e2d\u53c2\u6570：request：\u539f\u751f\u8bf7\u6c42\u5bf9\u8c61，response：\u539f\u751f\u7684\u54cd\u5e94\u5bf9\u8c61，\u7b2c\u4e09\u4e2a\u53c2\u6570 FilterChain，\u5305\u542b\u4e00\u4e2a doFilter()，\u8c03\u7528
\n\u00a0\u00a0 \u00a0 * \u8be5\u53c2\u6570\u7684 doFilter() \u53ef\u4ee5\u653e\u884c\u8bf7\u6c42\u548c\u54cd\u5e94，\u5426\u5219\u5c31\u662f\u62e6\u622a
\n\u00a0\u00a0 \u00a0 *\/
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0throws IOException, ServletException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("UserFilter \u7684 doFilter() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0chain.doFilter(request, response);\/\/\u653e\u884c\u8bf7\u6c42\u548c\u54cd\u5e94
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\/\/UserFilter \u88ab\u9500\u6bc1\u7684\u65f6\u5019\u8c03\u7528\u7684\u65b9\u6cd5
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void destroy() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("UserFilter \u7684 destroy() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0}
\n}<\/p>\n

web.xml：<\/p>\n

<?xml version="1.0" encoding="UTF-8"?>
\n<web-app xmlns:xsi="http:\/\/www.w3.org\/2001\/XMLSchema-instance" xmlns="http:\/\/xmlns.jcp.org\/xml\/ns\/javaee" xsi:schemaLocation="http:\/\/xmlns.jcp.org\/xml\/ns\/javaee http:\/\/xmlns.jcp.org\/xml\/ns\/javaee\/web-app_3_1.xsd" version="3.1">
\n\u00a0 <display-name>javaweb2<\/display-name>
\n\u00a0 <welcome-file-list>
\n\u00a0 \u00a0 <welcome-file>index.html<\/welcome-file>
\n\u00a0 \u00a0 <welcome-file>index.htm<\/welcome-file>
\n\u00a0 \u00a0 <welcome-file>index.jsp<\/welcome-file>
\n\u00a0 \u00a0 <welcome-file>default.html<\/welcome-file>
\n\u00a0 \u00a0 <welcome-file>default.htm<\/welcome-file>
\n\u00a0 \u00a0 <welcome-file>default.jsp<\/welcome-file>
\n\u00a0 <\/welcome-file-list>
\n\u00a0\u00a0
\n\u00a0 <!– \u914d\u7f6e\u81ea\u5b9a\u4e49\u8fc7\u6ee4\u5668 –>
\n\u00a0 <filter>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u8fc7\u6ee4\u5668\u7684\u540d\u79f0，\u540d\u79f0\u968f\u610f –>
\n\u00a0 \u00a0\u00a0 \u00a0<filter-name>UserFilter<\/filter-name>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u8fc7\u6ee4\u5668\u7684\u5168\u7c7b\u540d –>
\n\u00a0 \u00a0\u00a0 \u00a0<filter-class>com.edu.ctrl.UserFilter<\/filter-class>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u521d\u59cb\u5316\u53c2\u6570 –>
\n\u00a0 \u00a0\u00a0 \u00a0<init-param>
\n\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<param-name>param<\/param-name>
\n\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<param-value>\u901a\u8fc7\u5728 web.xml \u4e2d\u914d\u7f6e\u7684\u8fc7\u6ee4\u5668\u7684\u521d\u59cb\u5316\u53c2\u6570<\/param-value>
\n\u00a0 \u00a0\u00a0 \u00a0<\/init-param>
\n\u00a0 <\/filter>
\n\u00a0 <!– \u8fc7\u6ee4\u5668\u6620\u5c04 –>
\n\u00a0 <filter-mapping>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u8fc7\u6ee4\u5668\u7684\u540d\u79f0，\u8981\u548c\u4e0a\u9762\u4fdd\u6301\u4e00\u81f4 –>
\n\u00a0 \u00a0\u00a0 \u00a0<filter-name>UserFilter<\/filter-name>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u8fc7\u6ee4\u5668\u62e6\u622a\u7684\u5730\u5740，\u5176\u4e2d"\/*"\u8868\u793a\u62e6\u622a\u6240\u6709\u7684\u8bf7\u6c42\u548c\u54cd\u5e94 –>
\n\u00a0 \u00a0\u00a0 \u00a0<url-pattern>\/*<\/url-pattern>
\n\u00a0 <\/filter-mapping>
\n<\/web-app><\/p>\n

\u6d4b\u8bd5：<\/p>\n

\"\"<\/p>\n

\u793a\u4f8b：\u5b57\u7b26\u7f16\u7801\u8fc7\u6ee4\u5668，\u8bbe\u7f6e\u6240\u6709\u7684\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u5b57\u7b26\u7f16\u7801\u4e3a UTF-8，\u8fd9\u6837\u6211\u4eec\u4e0d\u7528\u6bcf\u6b21\u90fd\u53bb\u8bbe\u7f6e\u5b57\u7b26\u7f16\u7801<\/p>\n

CharacterEncodingFilter.java：<\/p>\n

package com.edu.utils;<\/p>\n

import java.io.IOException;<\/p>\n

import javax.servlet.Filter;
\nimport javax.servlet.FilterChain;
\nimport javax.servlet.FilterConfig;
\nimport javax.servlet.ServletException;
\nimport javax.servlet.ServletRequest;
\nimport javax.servlet.ServletResponse;
\nimport javax.servlet.http.HttpServletRequest;
\nimport javax.servlet.http.HttpServletResponse;<\/p>\n

public class CharacterEncodingFilter implements Filter{
\n\u00a0\u00a0 \u00a0private String encoding = "";\/\/\u4ece web.xml \u4e2d\u8bfb\u53d6\u914d\u7f6e\u7684\u5b57\u7b26\u7f16\u7801\u540d\u79f0\u7684\u53c2\u6570
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void init(FilterConfig config) throws ServletException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bfb\u53d6\u521d\u59cb\u5316\u53c2\u6570\u4e2d\u914d\u7f6e\u7684\u5b57\u7b26\u7f16\u7801\u540d\u79f0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0encoding = config.getInitParameter("encoding");
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0throws IOException, ServletException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 * \u5bf9\u6240\u6709\u7684\u8bf7\u6c42\u548c\u54cd\u5e94\u90fd\u8bbe\u7f6e\u5b57\u7b26\u7f16\u7801\u540e\u518d\u653e\u884c，\u90a3\u4e48\u6240\u6709\u7684\u8bf7\u6c42\u548c\u54cd\u5e94\u5c31\u652f\u6301\u4e2d\u6587
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 *\/
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u5c06\u539f\u751f\u7684\u8bf7\u6c42\u548c\u54cd\u5e94\u8f6c\u6362\u4e3a HTTP \u7684\u8bf7\u6c42\u548c\u54cd\u5e94
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0HttpServletRequest request = (HttpServletRequest) req;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0HttpServletResponse response = (HttpServletResponse) resp;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bbe\u7f6e\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u7f16\u7801
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.setCharacterEncoding(encoding);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0response.setContentType("text\/html;charset=" + encoding);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bbe\u7f6e\u597d\u7f16\u7801\u540e，\u653e\u884c\u8bf7\u6c42\u54cd\u5e94
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0chain.doFilter(request, response);
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void destroy() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0}<\/p>\n

}<\/p>\n

web.xml：<\/p>\n

<?xml version="1.0" encoding="UTF-8"?>
\n<web-app xmlns:xsi="http:\/\/www.w3.org\/2001\/XMLSchema-instance" xmlns="http:\/\/xmlns.jcp.org\/xml\/ns\/javaee" xsi:schemaLocation="http:\/\/xmlns.jcp.org\/xml\/ns\/javaee http:\/\/xmlns.jcp.org\/xml\/ns\/javaee\/web-app_3_1.xsd" version="3.1">
\n\u00a0 <display-name>javaweb2<\/display-name>
\n\u00a0 <welcome-file-list>
\n\u00a0 \u00a0 <welcome-file>index.html<\/welcome-file>
\n\u00a0 \u00a0 <welcome-file>index.htm<\/welcome-file>
\n\u00a0 \u00a0 <welcome-file>index.jsp<\/welcome-file>
\n\u00a0 \u00a0 <welcome-file>default.html<\/welcome-file>
\n\u00a0 \u00a0 <welcome-file>default.htm<\/welcome-file>
\n\u00a0 \u00a0 <welcome-file>default.jsp<\/welcome-file>
\n\u00a0 <\/welcome-file-list>
\n\u00a0\u00a0
\n\u00a0 <!– \u914d\u7f6e\u81ea\u5b9a\u4e49\u8fc7\u6ee4\u5668 –>
\n\u00a0 <filter>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u8fc7\u6ee4\u5668\u7684\u540d\u79f0，\u540d\u79f0\u968f\u610f –>
\n\u00a0 \u00a0\u00a0 \u00a0<filter-name>CharacterEncodingFilter<\/filter-name>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u8fc7\u6ee4\u5668\u7684\u5168\u7c7b\u540d –>
\n\u00a0 \u00a0\u00a0 \u00a0<filter-class>com.edu.utils.CharacterEncodingFilter<\/filter-class>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u521d\u59cb\u5316\u53c2\u6570 –>
\n\u00a0 \u00a0\u00a0 \u00a0<init-param>
\n\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<param-name>encoding<\/param-name>
\n\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<param-value>UTF-8<\/param-value>
\n\u00a0 \u00a0\u00a0 \u00a0<\/init-param>
\n\u00a0 <\/filter>
\n\u00a0 <!– \u8fc7\u6ee4\u5668\u6620\u5c04 –>
\n\u00a0 <filter-mapping>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u8fc7\u6ee4\u5668\u7684\u540d\u79f0，\u8981\u548c\u4e0a\u9762\u4fdd\u6301\u4e00\u81f4 –>
\n\u00a0 \u00a0\u00a0 \u00a0<filter-name>CharacterEncodingFilter<\/filter-name>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u8fc7\u6ee4\u5668\u62e6\u622a\u7684\u5730\u5740，\u5176\u4e2d"\/*"\u8868\u793a\u62e6\u622a\u6240\u6709\u7684\u8bf7\u6c42\u548c\u54cd\u5e94 –>
\n\u00a0 \u00a0\u00a0 \u00a0<url-pattern>\/*<\/url-pattern>
\n\u00a0 <\/filter-mapping>
\n<\/web-app><\/p>\n

\u6ce8\u610f：\u5982\u679c web.xml \u4e2d\u8fd8\u6709\u5176\u4ed6\u8fc7\u6ee4\u5668\u914d\u7f6e，\u5b57\u7b26\u7f16\u7801\u8fc7\u6ee4\u5668\u5e94\u8be5\u914d\u7f6e\u6210\u7b2c\u4e00\u4e2a，\u8fd9\u6837\u6240\u6709\u7684\u8bf7\u6c42\u548c\u54cd\u5e94\u4f1a\u5728\u7b2c\u4e00\u65f6\u95f4\u88ab\u8fc7\u6ee4\u3002<\/p>\n

\u6d4b\u8bd5：<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u6ca1\u6709\u4e2d\u6587\u4e71\u7801\u7684\u95ee\u9898，\u5b57\u7b26\u7f16\u7801\u8fc7\u6ee4\u5668\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n

\u4e09\u3001Servlet \u76d1\u542c\u5668<\/h3>\n

1. Servlet \u89c4\u8303\u4e2d\u5b9a\u4e49\u4e866 \u4e2a\u76d1\u542c\u5668<\/p>\n

1.1 \u76d1\u542c\u57df\u5bf9\u8c61<\/p>\n

\u76d1\u542cServletContext(application)\u3001HttpSession(session)\u3001ServletRequest(request)\u57df\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1<\/p>\n

1.2 \u76d1\u542c\u57df\u5bf9\u8c61\u5c5e\u6027<\/p>\n

\u76d1\u542cServletContext\u3001HttpSession\u3001ServletRequest \u57df\u5bf9\u8c61\u7684\u5c5e\u6027\u7684\u53d8\u5316（\u6dfb\u52a0\u3001\u66f4\u65b0\u3001\u5220\u9664）<\/p>\n

2. \u521b\u5efa Servlet \u76d1\u542c\u5668<\/p>\n

\u521b\u5efa Servlet \u76d1\u542c\u5668\u53ea\u9700\u8981\u5b9e\u73b0\u76f8\u5e94\u7684\u63a5\u53e3\u5e76\u91cd\u5199\u63a5\u53e3\u4e2d\u65b9\u6cd5，\u7136\u540e\u5728 web.xml \u4e2d\u914d\u7f6e\u6216\u4f7f\u7528 @WebListener \u6ce8\u89e3\u6ce8\u518c\u5373\u53ef\u3002<\/p>\n

2.1 \u76d1\u542c\u57df\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1<\/p>\n

（1）ServletConextListener：\u76d1\u542c ServletContext \u5bf9\u8c61（application\u5bf9\u8c61）<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01. void contextInitialized(ServletContextEvent sce)：\u670d\u52a1\u5668\u542f\u52a8\u521b\u5efaServletContext\u57df\u5bf9\u8c61\u7684\u65f6\u5019\u89e6\u53d1<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a02. void contextDestroyed(ServletContextEvent sce)：\u670d\u52a1\u5668\u5173\u95ed\u6216\u5e94\u7528\u79fb\u9664\u9500\u6bc1ServletContext\u57df\u5bf9\u8c61\u65f6\u89e6\u53d1<\/p>\n

（2）HttpSessionListener：\u76d1\u542c session \u5bf9\u8c61<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01. void sessionCreated(HttpSessionEvent se)：\u7b2c\u4e00\u6b21\u8bf7\u6c42\u521b\u5efasession\u5bf9\u8c61\u65f6\u89e6\u53d1<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a02. void sessionDestroyed(HttpSessionEvent se)：\u9500\u6bc1 session \u65f6\u89e6\u53d1<\/p>\n

（3）ServletRequestListener：\u76d1\u542c request \u5bf9\u8c61<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01. void requestInitialized(ServletRequestEvent sre)：\u6bcf\u6b21\u8bf7\u6c42\u521b\u5efa request \u5bf9\u8c61\u65f6\u89e6\u53d1<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a02. void requestDestroyed(ServletRequestEvent sre)：\u670d\u52a1\u5668\u8fd4\u56de\u54cd\u5e94\u7ed9\u5ba2\u6237\u7aef\u65f6\u9500\u6bc1 request \u5bf9\u8c61\u7684\u65f6\u5019\u89e6\u53d1<\/p>\n

\u793a\u4f8b1：\u76d1\u542c application \u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1<\/p>\n

package com.edu.utils;<\/p>\n

import javax.servlet.ServletContextEvent;
\nimport javax.servlet.ServletContextListener;
\nimport javax.servlet.annotation.WebListener;<\/p>\n

\/\/@WebListener
\npublic class MyServletContextListner implements ServletContextListener {<\/p>\n

\n\u00a0 \u00a0 public MyServletContextListner() {
\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ TODO Auto-generated constructor stub
\n\u00a0 \u00a0 }<\/p>\n

\n\u00a0 \u00a0 public void contextInitialized(ServletContextEvent sce) \u00a0{\u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0System.out.println("application \u5bf9\u8c61\u521b\u5efa\u6210\u529f");
\n\u00a0 \u00a0 }
\n\u00a0 \u00a0\u00a0
\n\u00a0\u00a0 \u00a0
\n\u00a0 \u00a0 public void contextDestroyed(ServletContextEvent sce) \u00a0{\u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0System.out.println("application \u5bf9\u8c61\u9500\u6bc1");
\n\u00a0 \u00a0 }
\n\u00a0\u00a0 \u00a0
\n}<\/p>\n

web.xml：<\/p>\n

\u00a0<!– \u914d\u7f6e\u76d1\u542c\u5668 –>
\n\u00a0 <listener>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u76d1\u542c\u5668\u7684\u5168\u7c7b\u540d –>
\n\u00a0 \u00a0\u00a0 \u00a0<listener-class>com.edu.utils.MyServletContextListner<\/listener-class>
\n\u00a0 <\/listener><\/p>\n

\u6d4b\u8bd5：\u542f\u52a8\u670d\u52a1\u5668：<\/p>\n

\"\"<\/p>\n

\u7136\u540e\u6211\u4eec\u4fee\u6539\u4e00\u4e0b\u76d1\u542c\u5668\u4ee3\u7801，\u4fdd\u5b58，\u8ba9\u670d\u52a1\u5668\u91cd\u65b0\u52a0\u8f7d\u5e94\u7528：<\/p>\n

\"\"<\/p>\n

2.2 \u76d1\u542c\u57df\u5bf9\u8c61\u7684\u5c5e\u6027<\/p>\n

（1）ServletContextAttributeListener：\u76d1\u542capplication\u57df\u5bf9\u8c61\u7684\u5c5e\u6027\u53d8\u5316<\/p>\n

1. public void attributeAdded(ServletContextAttributeEvent scae)：\u6dfb\u52a0application\u57df\u5c5e\u6027\u65f6\u89e6\u53d1<\/p>\n

2. public void attributeReplaced(ServletContextAttributeEvent scae)：\u4fee\u6539application\u57df\u5c5e\u6027\u65f6\u89e6\u53d1<\/p>\n

3. public void attributeRemoved(ServletContextAttributeEvent scae)：\u5220\u9664application\u57df\u5c5e\u6027\u65f6\u89e6\u53d1<\/p>\n

（2）HttpSessionAttributeListener：\u76d1\u542csession\u57df\u5bf9\u8c61\u5c5e\u6027\u53d8\u5316<\/p>\n

1. public void attributeAdded(HttpSessionBindingEvent hsbe)：\u6dfb\u52a0session\u57df\u5c5e\u6027\u65f6\u89e6\u53d1<\/p>\n

2. public void attributeReplaced(HttpSessionBindingEvent hsbe)：\u4fee\u6539session\u57df\u5c5e\u6027\u65f6\u89e6\u53d1<\/p>\n

3. public void attributeRemoved(HttpSessionBindingEvent hsbe)：\u5220\u9664session\u57df\u5c5e\u6027\u65f6\u89e6\u53d1<\/p>\n

（3）ServletRequestAttributeListener：\u76d1\u542crequest\u57df\u5c5e\u6027\u53d8\u5316<\/p>\n

1. public void attributeAdded(ServletRequestAttributeEvent srae)：\u6dfb\u52a0request\u57df\u5c5e\u6027\u65f6\u89e6\u53d1<\/p>\n

2. public void attributeReplaced(ServletRequestAttributeEvent srae)：\u4fee\u6539request\u57df\u5c5e\u6027\u65f6\u89e6\u53d1<\/p>\n

3. public void attributeRemoved(ServletRequestAttributeEvent srae)：\u5220\u9664request\u57df\u5c5e\u6027\u65f6\u89e6\u53d1<\/p>\n

\u793a\u4f8b：\u76d1\u542c session \u57df\u5c5e\u6027\u7684\u53d8\u5316<\/p>\n

MyHttpSessionAttributeLisenter.java：<\/p>\n

package com.edu.utils;<\/p>\n

import java.text.MessageFormat;<\/p>\n

import javax.servlet.annotation.WebListener;
\nimport javax.servlet.http.HttpSessionAttributeListener;
\nimport javax.servlet.http.HttpSessionBindingEvent;<\/p>\n

@WebListener \/\/\u4f7f\u7528\u6ce8\u89e3\u65b9\u5f0f\u6765\u914d\u7f6e
\npublic class MyHttpSessionAttributeLisenter implements HttpSessionAttributeListener {<\/p>\n

\u00a0 \u00a0 \/**
\n\u00a0 \u00a0 \u00a0* Default constructor.\u00a0
\n\u00a0 \u00a0 \u00a0*\/
\n\u00a0 \u00a0 public MyHttpSessionAttributeLisenter() {
\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ TODO Auto-generated constructor stub
\n\u00a0 \u00a0 }
\n\u00a0 \u00a0\u00a0
\n\u00a0 \u00a0 \/\/\u6dfb\u52a0 session \u57df\u5c5e\u6027\u65f6\u89e6\u53d1
\n\u00a0 \u00a0 public void attributeAdded(HttpSessionBindingEvent hbe) \u00a0{\u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0\/\/{0},{1}\u662f\u5360\u4f4d\u7b26，\u540e\u9762\u7684\u503c\u4f1a\u586b\u5145\u5b83，\u7c7b\u4f3c\u4e8e C \u8bed\u8a00\u7684 printf("%d", a);
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0String str = MessageFormat.format("session \u57df\u5c5e\u6027\u503c\u589e\u52a0\u4e86\u5c5e\u6027：{0}，\u5c5e\u6027\u503c:{1}", hbe.getName(), hbe.getValue());
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0System.out.println(str);
\n\u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \/\/\u4fee\u6539 session \u57df\u5c5e\u6027\u65f6\u89e6\u53d1
\n\u00a0 \u00a0 public void attributeReplaced(HttpSessionBindingEvent hbe) \u00a0{\u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0\/\/{0},{1}\u662f\u5360\u4f4d\u7b26，\u540e\u9762\u7684\u503c\u4f1a\u586b\u5145\u5b83，\u7c7b\u4f3c\u4e8e C \u8bed\u8a00\u7684 printf("%d", a);
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0String str = MessageFormat.format("session \u57df\u5c5e\u6027\u503c\u4fee\u6539\u4e86\u5c5e\u6027：{0}，\u5c5e\u6027\u503c:{1}", hbe.getName(), hbe.getValue());
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0System.out.println(str);
\n\u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \/\/\u5220\u9664 session \u57df\u5c5e\u6027\u65f6\u89e6\u53d1
\n\u00a0 \u00a0 public void attributeRemoved(HttpSessionBindingEvent hbe) \u00a0{\u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ TODO Auto-generated method stub
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0\/\/{0},{1}\u662f\u5360\u4f4d\u7b26，\u540e\u9762\u7684\u503c\u4f1a\u586b\u5145\u5b83，\u7c7b\u4f3c\u4e8e C \u8bed\u8a00\u7684 printf("%d", a);
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0String str = MessageFormat.format("session \u57df\u5c5e\u6027\u503c\u5220\u9664\u4e86\u5c5e\u6027：{0}，\u5c5e\u6027\u503c:{1}", hbe.getName(), hbe.getValue());
\n\u00a0 \u00a0 \u00a0\u00a0 \u00a0System.out.println(str);
\n\u00a0 \u00a0}<\/p>\n

}<\/p>\n

test.jsp：<\/p>\n

<%@ page language="java" contentType="text\/html; charset=UTF-8"
\n\u00a0 \u00a0 pageEncoding="UTF-8"%>
\n<!DOCTYPE html>
\n<html>
\n<head>
\n<meta charset="UTF-8">
\n<title>test<\/title>
\n<\/head>
\n<body>
\n\u00a0\u00a0 \u00a0<%
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0session.setAttribute("name", "\u5f20\u4e09");\/\/\u589e\u52a0\u57df\u5c5e\u6027
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0session.setAttribute("name", "\u674e\u56db");\/\/\u4fee\u6539\u57df\u5c5e\u6027
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0session.removeAttribute("name");\/\/\u79fb\u9664\u57df\u5c5e\u6027
\n\u00a0\u00a0 \u00a0%>
\n<\/body>
\n<\/html><\/p>\n

\u6d4b\u8bd5：\u8bf7\u6c42 test.jsp：<\/p>\n

\"\"<\/p>\n

\u56db\u3001 MVC \u8bbe\u8ba1\u6a21\u5f0f<\/h3>\n

MVC \u8bbe\u8ba1\u6a21\u5f0f\u7684\u57fa\u672c\u539f\u7406\u5c31\u662f\u628a\u5e94\u7528\u7a0b\u5e8f\u7684\u4e1a\u52a1\u903b\u8f91，\u6570\u636e\u5916\u89c2\u5448\u73b0\u4ee5\u53ca\u6570\u636e\u7684\u64cd\u4f5c\u5212\u5206\u5230\u4e0d\u540c\u7684\u5b9e\u4f53\u4e2d，\u8fd9\u4e9b\u5b9e\u4f53\u5206\u522b\u79f0\u4e3a：\u201c\u6a21\u578b(Model)\u201d\u3001\u201c\u89c6\u56fe(View)\u201d\u548c\u201d\u63a7\u5236\u5668(Controller)\u201c\u3002<\/p>\n

1. MVC \u8bbe\u8ba1\u6a21\u5f0f\u7684\u7ed3\u6784\u56fe：<\/p>\n

\"\"<\/p>\n

\u89c6\u56fe(View)：\u4ee3\u8868\u7528\u6237\u4ea4\u4e92\u7684\u754c\u9762，\u5bf9\u4e8eWeb\u5e94\u7528\u6765\u8bf4，\u53ef\u4ee5\u662fHTML\u9875\u9762\u3001JSP\u9875\u9762\u7b49\u7b49\u3002<\/p>\n

\u6a21\u578b(Model)：\u5b9e\u73b0\u4e1a\u52a1\u903b\u8f91\u7684\u5904\u7406，\u53ef\u4ee5\u7b80\u5355\u8ba4\u4e3a\u5c31\u662f\u8ddf\u6570\u636e\u5e93\u4ea4\u4e92\u7684\u6a21\u5757，\u4e00\u822c\u7531JavaBean\u6765\u5145\u5f53\u3002<\/p>\n

\u63a7\u5236\u5668(Controller)：\u63a7\u5236\u5668\u53ef\u4ee5\u7406\u89e3\u4e3a\u4ece\u7528\u6237\u63a5\u6536\u8bf7\u6c42，\u5c06\u6a21\u578b\u548c\u89c6\u56fe\u5339\u914d\u5728\u4e00\u8d77\u5171\u540c\u5b8c\u6210\u7528\u6237\u7684\u8bf7\u6c42，\u63a7\u5236\u5668\u7684\u4f5c\u7528\u76f8\u5f53\u4e8e\u5c31\u662f\u4e00\u4e2a\u4e2d\u592e\u8c03\u5ea6\u5668，\u9009\u62e9\u6a21\u578b\u548c\u89c6\u56fe\u5e76\u5b8c\u6210\u7528\u6237\u7684\u8bf7\u6c42\u5904\u7406\u3002\u4e00\u822c\u7531 Servlet \u6765\u5145\u5f53\u3002<\/p>\n

2. MVC \u8bbe\u8ba1\u6a21\u5f0f\u7684\u4f18\u70b9<\/p>\n

(1) \u6709\u591a\u4e2a\u89c6\u56fe\u5bf9\u5e94\u4e00\u4e2a\u6a21\u578b\u7684\u80fd\u529b\u3002<\/p>\n

(2) \u7531\u4e8e\u6a21\u578b\u8fd4\u56de\u7684\u6570\u636e\u4e0d\u5e26\u4efb\u4f55\u663e\u793a\u683c\u5f0f，\u56e0\u6b64\u8fd9\u4e9b\u6a21\u578b\u4e5f\u53ef\u4ee5\u76f4\u63a5\u5e94\u7528\u4e8e\u63a5\u53e3\u7684\u4f7f\u7528\u3002<\/p>\n

(3) \u7531\u4e8e\u4e00\u4e2a\u5e94\u7528\u88ab\u5206\u79bb\u6210\u4e86 3 \u5c42，\u56e0\u6b64\u6709\u65f6\u53ea\u9700\u6539\u53d8\u5176\u4e2d\u4e00\u5c42\u5c31\u80fd\u6ee1\u8db3\u5e94\u7528\u7684\u8981\u6c42\u3002<\/p>\n

(4) \u63a7\u5236\u5c42\u7684\u6982\u5ff5\u4e5f\u5f88\u6709\u6548，\u7531\u4e8e\u5b83\u628a\u4e0d\u540c\u7684\u6a21\u578b\u548c\u4e0d\u540c\u7684\u89c6\u56fe\u7ec4\u5408\u5728\u4e00\u8d77\u5b8c\u6210\u4e0d\u540c\u7684\u8bf7\u6c42，\u56e0\u6b64\u63a7\u5236\u5c42\u53ef\u4ee5\u8bf4\u5305\u542b\u4e86\u7528\u6237\u8bf7\u6c42\u6743\u9650\u7684\u6982\u5ff5\u3002<\/p>\n

3. MVC \u8bbe\u8ba1\u6a21\u5f0f\u7684\u7f3a\u70b9<\/p>\n

(1) MVC \u8bbe\u8ba1\u6a21\u5f0f\u5b9e\u73b0\u4e0d\u5bb9\u6613，\u7406\u89e3\u8d77\u6765\u6bd4\u8f83\u56f0\u96be，\u5bf9\u5f00\u53d1\u4eba\u5458\u8981\u6c42\u6bd4\u8f83\u9ad8\u3002<\/p>\n

(2) \u6a21\u578b\u548c\u89c6\u56fe\u7684\u5206\u79bb\u53ef\u80fd\u4f7f\u8c03\u8bd5\u6bd4\u8f83\u56f0\u96be，\u4f46\u662f\u66f4\u5bb9\u6613\u53d1\u73b0\u9519\u8bef\u3002<\/p>\n

(3) MVC \u7531\u4e8e\u5c06\u5e94\u7528\u5206\u4e3a\u4e86 3 \u5c42，\u8fd9\u610f\u5473\u7740\u6587\u4ef6\u5c06\u589e\u591a，\u56e0\u6b64\u6587\u4ef6\u7ba1\u7406\u56f0\u96be\u3002<\/p>\n

4. JSP \u548c Servlet \u5b9e\u73b0 MVC \u8bbe\u8ba1\u6a21\u5f0f<\/p>\n

JSP \u548c Servlet \u5b9e\u73b0 MVC \u8bbe\u8ba1\u6a21\u5f0f\u53ef\u4ee5\u4f7f\u7528 JSP \u5145\u5f53\u89c6\u56fe\u5c42\u3001Servlet \u5145\u5f53\u63a7\u5236\u5668\u3001JavaBean \u5145\u5f53\u6a21\u578b，\u5176\u7ed3\u6784\u5982\u4e0b：<\/p>\n

\"\"<\/p>\n

5. \u5b9e\u73b0 MVC \u8bbe\u8ba1\u6a21\u5f0f<\/p>\n

(1) \u521b\u5efa\u6570\u636e\u5e93\u8868<\/p>\n

\"\"<\/p>\n

(2) \u521b\u5efa Web \u5de5\u7a0b，\u5bfc\u5165 mysql \u9a71\u52a8<\/p>\n

\"\"<\/p>\n

(3) \u521b\u5efa JavaBean：\u8981\u6c42 JavaBean \u7684\u5c5e\u6027\u540d\u9700\u8981\u548c\u8868\u7684\u5b57\u6bb5\u540c\u540d<\/p>\n

package com.edu.beans;<\/p>\n

public class User {
\n\u00a0\u00a0 \u00a0private int id;
\n\u00a0\u00a0 \u00a0private String name;
\n\u00a0\u00a0 \u00a0private String pwd;
\n\u00a0\u00a0 \u00a0private int age;
\n\u00a0\u00a0 \u00a0private String sex;
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0public User() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated constructor stub
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public User(String name, String pwd, int age, String sex) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0super();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.name = name;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.pwd = pwd;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.age = age;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.sex = sex;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public User(int id, String name, String pwd, int age, String sex) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0super();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.id = id;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.name = name;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.pwd = pwd;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.age = age;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.sex = sex;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public int getId() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return id;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public void setId(int id) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.id = id;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public String getName() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return name;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public void setName(String name) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.name = name;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public String getPwd() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return pwd;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public void setPwd(String pwd) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.pwd = pwd;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public int getAge() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return age;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public void setAge(int age) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.age = age;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public String getSex() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return sex;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0public void setSex(String sex) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0this.sex = sex;
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public String toString() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return "User [id=" + id + ", name=" + name + ", pwd=" + pwd + ", age=" + age + ", sex=" + sex + "]";
\n\u00a0\u00a0 \u00a0}
\n}<\/p>\n

(4) \u62f7\u8d1d\u4e4b\u524d\u5199\u7684\u6570\u636e\u5e93\u5de5\u5177\u7c7b ConnectionFactory \u548c DbHelper \u5230\u5f53\u524d\u5de5\u7a0b：<\/p>\n

\"\"<\/p>\n

(5) \u521b\u5efa Dao \u5c42<\/p>\n

\u63a5\u53e3：IUserDao.java：<\/p>\n

package com.edu.dao;<\/p>\n

import java.util.List;<\/p>\n

import com.edu.beans.User;<\/p>\n

\/\/\u6a21\u578b(Model)
\npublic interface IUserDao {
\n\u00a0\u00a0 \u00a0void save(User user);\/\/\u589e
\n\u00a0\u00a0 \u00a0void delete(int id);\/\/\u5220
\n\u00a0\u00a0 \u00a0void update(User user);\/\/\u6539
\n\u00a0\u00a0 \u00a0List<User> getUsers();\/\/\u67e5
\n}<\/p>\n

\u5b9e\u73b0\u7c7b：UserDaoImpl.java<\/p>\n

package com.edu.dao.impl;<\/p>\n

import java.util.List;<\/p>\n

import com.edu.beans.User;
\nimport com.edu.dao.IUserDao;
\nimport com.edu.utils.DbHelper;<\/p>\n

public class UserDaoImpl implements IUserDao{<\/p>\n

\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void save(User user) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String sql = "insert into users(name,pwd,age,sex) values(?,?,?,?)";
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0DbHelper.update(sql, user.getName(),user.getPwd(),user.getAge(),user.getSex());
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void delete(int id) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String sql = "delete from users where id=?";
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0DbHelper.update(sql, id);
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void update(User user) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String sql = "update users set name=?,pwd=?,age=?,sex=? where id=?";
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0DbHelper.update(sql, user.getName(),user.getPwd(),user.getAge(),user.getSex(),user.getId());
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public List<User> getUsers() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String sql = "select * from users";
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return DbHelper.getList(User.class, sql, null);
\n\u00a0\u00a0 \u00a0}<\/p>\n

}<\/p>\n

(6) \u521b\u5efa Service \u5c42<\/p>\n

\u63a5\u53e3：IUserService.java：<\/p>\n

package com.edu.service;<\/p>\n

import java.util.List;<\/p>\n

import com.edu.beans.User;<\/p>\n

public interface IUserService {
\n\u00a0\u00a0 \u00a0void save(User user);\/\/\u589e
\n\u00a0\u00a0 \u00a0void delete(int id);\/\/\u5220
\n\u00a0\u00a0 \u00a0void update(User user);\/\/\u6539
\n\u00a0\u00a0 \u00a0List<User> getUsers();\/\/\u67e5
\n}<\/p>\n

\u5b9e\u73b0\u7c7b：UserServiceImpl.java:<\/p>\n

package com.edu.service.impl;<\/p>\n

import java.util.List;<\/p>\n

import com.edu.beans.User;
\nimport com.edu.dao.IUserDao;
\nimport com.edu.dao.impl.UserDaoImpl;
\nimport com.edu.service.IUserService;<\/p>\n

public class UserServiceImpl implements IUserService{
\n\u00a0\u00a0 \u00a0private IUserDao userDao = new UserDaoImpl();\/\/\u5411\u4e0a\u8f6c\u578b
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void save(User user) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0userDao.save(user);
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void delete(int id) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0userDao.delete(id);
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void update(User user) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0userDao.update(user);
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public List<User> getUsers() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return userDao.getUsers();
\n\u00a0\u00a0 \u00a0}<\/p>\n

}<\/p>\n

(7) \u521b\u5efa\u4e3b\u9875 index.jsp，\u653e\u5728 webapp \u76ee\u5f55\u4e0b，\u8ba9\u5b83\u8bf7\u6c42 UserServlet(Controller)，\u9644\u52a0\u4e00\u4e2a\u8bf7\u6c42\u53c2\u6570 action=getusers \u4f5c\u4e3a\u8bf7\u6c42\u7684\u7c7b\u578b<\/p>\n

<%@ page language="java" contentType="text\/html; charset=UTF-8"
\n\u00a0 \u00a0 pageEncoding="UTF-8"%>
\n<!DOCTYPE html>
\n<html>
\n<head>
\n<meta charset="UTF-8">
\n<title>\u4e3b\u9875<\/title>
\n<\/head>
\n<body>
\n\u00a0\u00a0 \u00a0<a href="userController?action=getusers">\u67e5\u770b\u7528\u6237\u4fe1\u606f<\/a>
\n<\/body>
\n<\/html><\/p>\n

(8) \u521b\u5efa UserServlet，\u4f5c\u4e3a\u63a7\u5236\u5668 Controller<\/p>\n

package com.edu.ctrl;<\/p>\n

import java.io.IOException;
\nimport java.util.List;<\/p>\n

import javax.servlet.ServletConfig;
\nimport javax.servlet.ServletException;
\nimport javax.servlet.annotation.WebServlet;
\nimport javax.servlet.http.HttpServlet;
\nimport javax.servlet.http.HttpServletRequest;
\nimport javax.servlet.http.HttpServletResponse;<\/p>\n

import com.edu.beans.User;
\nimport com.edu.service.IUserService;
\nimport com.edu.service.impl.UserServiceImpl;<\/p>\n

@WebServlet("\/userController")
\npublic class UserServlet extends HttpServlet{
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0public UserServlet() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated constructor stub
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void init(ServletConfig config) throws ServletException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bbe\u7f6e\u5b57\u7b26\u7f16\u7801
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.setCharacterEncoding("UTF-8");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0response.setContentType("text\/html;charset=UTF-8");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u83b7\u53d6\u8bf7\u6c42\u7c7b\u578b
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String action = request.getParameter("action");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u4ea7\u751f\u4e1a\u52a1\u5bf9\u8c61(Model)
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0IUserService userService = new UserServiceImpl();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0switch (action) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "getusers":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0List<User> users = userService.getUsers();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.setAttribute("users", users);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bf7\u6c42\u8f6c\u53d1
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.getRequestDispatcher("\/WEB-INF\/show.jsp").forward(request, response);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "deleteuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "insertuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "updateuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0default:
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0doGet(request, response);\/\/\u5982\u679c\u662f POST \u8bf7\u6c42，\u76f4\u63a5\u8c03\u7528 doGet() \u65b9\u6cd5
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void destroy() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0}
\n}<\/p>\n

(9) \u5728 WEB-INF \u76ee\u5f55\u4e0b\u521b\u5efa show.jsp \u9875\u9762，\u663e\u793a\u7528\u6237\u4fe1\u606f<\/p>\n

\u00a0<%@page import="com.edu.beans.User"%>
\n<%@page import="java.util.List"%>
\n<%@ page language="java" contentType="text\/html; charset=UTF-8"
\n\u00a0 \u00a0 pageEncoding="UTF-8"%>
\n<!DOCTYPE html>
\n<html>
\n<head>
\n<meta charset="UTF-8">
\n<title>\u4e3b\u9875<\/title>
\n<\/head>
\n<body> \u00a0\u00a0
\n\u00a0<h3>\u6240\u6709\u7528\u6237\u4fe1\u606f：<\/h3>
\n\u00a0<table border="1" cellpadding="0" cellspacing="0">\u00a0
\n\u00a0 \u00a0 \u00a0<tr>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u7f16\u53f7<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u59d3\u540d<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u5bc6\u7801<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u5e74\u9f84<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u6027\u522b<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u64cd\u4f5c<\/th>
\n\u00a0 \u00a0 \u00a0<\/tr>
\n\u00a0 \u00a0 \u00a0<%
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0List<User> users = (List<User>)request.getAttribute("users");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0for(User user : users){
\n\u00a0 \u00a0 \u00a0%>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<tr>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getId() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getName() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getPwd() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getAge() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getSex() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a href="">\u5220\u9664<\/a>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a href="">\u66f4\u65b0<\/a>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/tr>
\n\u00a0 \u00a0 \u00a0<% \u00a0 \u00a0 \u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0}
\n\u00a0 \u00a0 \u00a0%>
\n\u00a0<\/table>
\n<\/body>
\n<\/html><\/p>\n

(10) \u5b9e\u73b0\u5220\u9664\u529f\u80fd<\/p>\n

\u4fee\u6539 WEB-INF\/show.jsp \u9875\u9762：<\/p>\n

\u00a0<%@page import="com.edu.beans.User"%>
\n<%@page import="java.util.List"%>
\n<%@ page language="java" contentType="text\/html; charset=UTF-8"
\n\u00a0 \u00a0 pageEncoding="UTF-8"%>
\n<!DOCTYPE html>
\n<html>
\n<head>
\n<meta charset="UTF-8">
\n<title>\u4e3b\u9875<\/title>
\n<\/head>
\n<body> \u00a0\u00a0
\n\u00a0<h3>\u6240\u6709\u7528\u6237\u4fe1\u606f：<\/h3>
\n\u00a0<table border="1" cellpadding="0" cellspacing="0">\u00a0
\n\u00a0 \u00a0 \u00a0<tr>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u7f16\u53f7<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u59d3\u540d<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u5bc6\u7801<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u5e74\u9f84<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u6027\u522b<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u64cd\u4f5c<\/th>
\n\u00a0 \u00a0 \u00a0<\/tr>
\n\u00a0 \u00a0 \u00a0<%
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0List<User> users = (List<User>)request.getAttribute("users");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0for(User user : users){
\n\u00a0 \u00a0 \u00a0%>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<tr>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getId() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getName() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getPwd() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getAge() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getSex() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a href="userController?action=deleteuser&id=<%=user.getId()%>">\u5220\u9664<\/a>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a href="">\u66f4\u65b0<\/a>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/tr>
\n\u00a0 \u00a0 \u00a0<% \u00a0 \u00a0 \u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0}
\n\u00a0 \u00a0 \u00a0%>
\n\u00a0<\/table>
\n<\/body>
\n<\/html><\/p>\n

\u4fee\u6539 UserServlet：<\/p>\n

package com.edu.ctrl;<\/p>\n

import java.io.IOException;
\nimport java.util.List;<\/p>\n

import javax.servlet.ServletConfig;
\nimport javax.servlet.ServletException;
\nimport javax.servlet.annotation.WebServlet;
\nimport javax.servlet.http.HttpServlet;
\nimport javax.servlet.http.HttpServletRequest;
\nimport javax.servlet.http.HttpServletResponse;<\/p>\n

import com.edu.beans.User;
\nimport com.edu.service.IUserService;
\nimport com.edu.service.impl.UserServiceImpl;<\/p>\n

@WebServlet("\/userController")
\npublic class UserServlet extends HttpServlet{
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0public UserServlet() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated constructor stub
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void init(ServletConfig config) throws ServletException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bbe\u7f6e\u5b57\u7b26\u7f16\u7801
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.setCharacterEncoding("UTF-8");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0response.setContentType("text\/html;charset=UTF-8");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u83b7\u53d6\u8bf7\u6c42\u7c7b\u578b
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String action = request.getParameter("action");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u4ea7\u751f\u4e1a\u52a1\u5bf9\u8c61(Model)
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0IUserService userService = new UserServiceImpl();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0switch (action) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "getusers":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0List<User> users = userService.getUsers();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.setAttribute("users", users);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bf7\u6c42\u8f6c\u53d1
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.getRequestDispatcher("\/WEB-INF\/show.jsp").forward(request, response);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "deleteuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u4ece\u524d\u7aef\u53d6\u51fa\u5f85\u5220\u9664\u7528\u6237\u7684id
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String tid = request.getParameter("id");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int id = Integer.parseInt(tid);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0userService.delete(id);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u5220\u9664\u4e4b\u540e\u5e94\u8be5\u91cd\u65b0\u53bb\u52a0\u8f7d\u6700\u65b0\u7684\u6570\u636e\u6765\u663e\u793a
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bf7\u6c42\u8f6c\u53d1
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.getRequestDispatcher("\/userController?action=getusers").forward(request, response);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "insertuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "updateuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0default:
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0doGet(request, response);\/\/\u5982\u679c\u662f POST \u8bf7\u6c42，\u76f4\u63a5\u8c03\u7528 doGet() \u65b9\u6cd5
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void destroy() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0}
\n}<\/p>\n

(11) \u589e\u52a0\u7528\u6237\u529f\u80fd<\/p>\n

\u00a0<%@page import="com.edu.beans.User"%>
\n<%@page import="java.util.List"%>
\n<%@ page language="java" contentType="text\/html; charset=UTF-8"
\n\u00a0 \u00a0 pageEncoding="UTF-8"%>
\n<!DOCTYPE html>
\n<html>
\n<head>
\n<meta charset="UTF-8">
\n<title>\u4e3b\u9875<\/title>
\n<\/head>
\n<body> \u00a0\u00a0
\n\u00a0<h3>\u6240\u6709\u7528\u6237\u4fe1\u606f：<\/h3>
\n\u00a0<table border="1" cellpadding="0" cellspacing="0">\u00a0
\n\u00a0 \u00a0 \u00a0<tr>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u7f16\u53f7<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u59d3\u540d<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u5bc6\u7801<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u5e74\u9f84<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u6027\u522b<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u64cd\u4f5c<\/th>
\n\u00a0 \u00a0 \u00a0<\/tr>
\n\u00a0 \u00a0 \u00a0<%
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0List<User> users = (List<User>)request.getAttribute("users");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0for(User user : users){
\n\u00a0 \u00a0 \u00a0%>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<tr>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getId() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getName() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getPwd() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getAge() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getSex() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a href="userController?action=deleteuser&id=<%=user.getId()%>">\u5220\u9664<\/a>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a href="">\u66f4\u65b0<\/a>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/tr>
\n\u00a0 \u00a0 \u00a0<% \u00a0 \u00a0 \u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0}
\n\u00a0 \u00a0 \u00a0%>
\n\u00a0<\/table>
\n\u00a0<hr>
\n\u00a0<h3>\u589e\u52a0\u7528\u6237\u4fe1\u606f<\/h3>
\n\u00a0<!– \u5982\u679cform \u7684action \u9644\u52a0\u4e86\u8bf7\u6c42\u53c2\u6570，\u90a3\u4e48\u8bf7\u6c42\u65b9\u5f0f method \u5fc5\u987b\u662f post –>
\n\u00a0<form action="userController?action=insertuser" method="post">
\n\u00a0\u00a0\u00a0 \u00a0\u59d3\u540d：<input type="text" name="name"> <br>
\n\u00a0\u00a0\u00a0 \u00a0\u5bc6\u7801：<input type="password" name="pwd"> <br>
\n\u00a0\u00a0\u00a0 \u00a0\u5e74\u9f84：<input type="text" name="age"> <br>
\n\u00a0\u00a0\u00a0 \u00a0\u6027\u522b：<input type="text" name="sex"> <br>
\n\u00a0\u00a0\u00a0 \u00a0<input type="submit" value="\u589e\u52a0">
\n\u00a0<\/form>
\n<\/body>
\n<\/html><\/p>\n

UserServlet：<\/p>\n

package com.edu.ctrl;<\/p>\n

import java.io.IOException;
\nimport java.util.List;<\/p>\n

import javax.servlet.ServletConfig;
\nimport javax.servlet.ServletException;
\nimport javax.servlet.annotation.WebServlet;
\nimport javax.servlet.http.HttpServlet;
\nimport javax.servlet.http.HttpServletRequest;
\nimport javax.servlet.http.HttpServletResponse;<\/p>\n

import com.edu.beans.User;
\nimport com.edu.service.IUserService;
\nimport com.edu.service.impl.UserServiceImpl;<\/p>\n

@WebServlet("\/userController")
\npublic class UserServlet extends HttpServlet{
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0public UserServlet() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated constructor stub
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void init(ServletConfig config) throws ServletException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bbe\u7f6e\u5b57\u7b26\u7f16\u7801
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.setCharacterEncoding("UTF-8");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0response.setContentType("text\/html;charset=UTF-8");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u83b7\u53d6\u8bf7\u6c42\u7c7b\u578b
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String action = request.getParameter("action");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u4ea7\u751f\u4e1a\u52a1\u5bf9\u8c61(Model)
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0IUserService userService = new UserServiceImpl();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0switch (action) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "getusers":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0List<User> users = userService.getUsers();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.setAttribute("users", users);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bf7\u6c42\u8f6c\u53d1
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.getRequestDispatcher("\/WEB-INF\/show.jsp").forward(request, response);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "deleteuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u4ece\u524d\u7aef\u53d6\u51fa\u5f85\u5220\u9664\u7528\u6237\u7684id
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String tid = request.getParameter("id");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int id = Integer.parseInt(tid);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0userService.delete(id);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u5220\u9664\u4e4b\u540e\u5e94\u8be5\u91cd\u65b0\u53bb\u52a0\u8f7d\u6700\u65b0\u7684\u6570\u636e\u6765\u663e\u793a
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bf7\u6c42\u8f6c\u53d1
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.getRequestDispatcher("\/userController?action=getusers").forward(request, response);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "insertuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u83b7\u53d6\u8868\u5355\u53c2\u6570
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String name = request.getParameter("name");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String pwd = request.getParameter("pwd");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String tage = request.getParameter("age");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int age = Integer.parseInt(tage);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String sex = request.getParameter("sex");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0User user = new User(name, pwd, age, sex);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0userService.save(user);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u5220\u9664\u4e4b\u540e\u5e94\u8be5\u91cd\u65b0\u53bb\u52a0\u8f7d\u6700\u65b0\u7684\u6570\u636e\u6765\u663e\u793a
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bf7\u6c42\u8f6c\u53d1
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.getRequestDispatcher("\/userController?action=getusers").forward(request, response);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "updateuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0default:
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0doGet(request, response);\/\/\u5982\u679c\u662f POST \u8bf7\u6c42，\u76f4\u63a5\u8c03\u7528 doGet() \u65b9\u6cd5
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void destroy() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0}
\n}<\/p>\n

(12) \u66f4\u65b0\u7528\u6237\u4fe1\u606f<\/p>\n

\u4fee\u6539 WEB-INF\/show.jsp \u9875\u9762：<\/p>\n

\u00a0<%@page import="com.edu.beans.User"%>
\n<%@page import="java.util.List"%>
\n<%@ page language="java" contentType="text\/html; charset=UTF-8"
\n\u00a0 \u00a0 pageEncoding="UTF-8"%>
\n<!DOCTYPE html>
\n<html>
\n<head>
\n<meta charset="UTF-8">
\n<title>\u4e3b\u9875<\/title>
\n<\/head>
\n<body> \u00a0\u00a0
\n\u00a0<h3>\u6240\u6709\u7528\u6237\u4fe1\u606f：<\/h3>
\n\u00a0<table border="1" cellpadding="0" cellspacing="0">\u00a0
\n\u00a0 \u00a0 \u00a0<tr>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u7f16\u53f7<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u59d3\u540d<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u5bc6\u7801<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u5e74\u9f84<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u6027\u522b<\/th>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<th>\u64cd\u4f5c<\/th>
\n\u00a0 \u00a0 \u00a0<\/tr>
\n\u00a0 \u00a0 \u00a0<%
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0List<User> users = (List<User>)request.getAttribute("users");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0for(User user : users){
\n\u00a0 \u00a0 \u00a0%>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<tr>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getId() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getName() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getPwd() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getAge() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td><%=user.getSex() %><\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a href="userController?action=deleteuser&id=<%=user.getId()%>">\u5220\u9664<\/a>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a href="update.jsp?id=<%=user.getId()%>&name=<%=user.getName()%>&pwd=<%=user.getPwd()%>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&age=<%=user.getAge()%>&sex=<%=user.getSex()%>">\u66f4\u65b0<\/a>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/td>
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/tr>
\n\u00a0 \u00a0 \u00a0<% \u00a0 \u00a0 \u00a0
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0}
\n\u00a0 \u00a0 \u00a0%>
\n\u00a0<\/table>
\n\u00a0<hr>
\n\u00a0<h3>\u589e\u52a0\u7528\u6237\u4fe1\u606f<\/h3>
\n\u00a0<!– \u5982\u679cform \u7684action \u9644\u52a0\u4e86\u8bf7\u6c42\u53c2\u6570，\u90a3\u4e48\u8bf7\u6c42\u65b9\u5f0f method \u5fc5\u987b\u662f post –>
\n\u00a0<form action="userController?action=insertuser" method="post">
\n\u00a0\u00a0\u00a0 \u00a0\u59d3\u540d：<input type="text" name="name"> <br>
\n\u00a0\u00a0\u00a0 \u00a0\u5bc6\u7801：<input type="password" name="pwd"> <br>
\n\u00a0\u00a0\u00a0 \u00a0\u5e74\u9f84：<input type="text" name="age"> <br>
\n\u00a0\u00a0\u00a0 \u00a0\u6027\u522b：<input type="text" name="sex"> <br>
\n\u00a0\u00a0\u00a0 \u00a0<input type="submit" value="\u589e\u52a0">
\n\u00a0<\/form>
\n<\/body>
\n<\/html><\/p>\n

\u5728 webapp \u76ee\u5f55\u4e0b\u521b\u5efa update.jsp \u9875\u9762：<\/p>\n

<%@ page language="java" contentType="text\/html; charset=UTF-8"
\n\u00a0 \u00a0 pageEncoding="UTF-8"%>
\n<!DOCTYPE html>
\n<html>
\n<head>
\n<meta charset="UTF-8">
\n<title>\u66f4\u65b0<\/title>
\n<\/head>
\n<body>
\n\u00a0\u00a0 \u00a0 <h3>\u66f4\u65b0\u7528\u6237\u4fe1\u606f<\/h3>
\n\u00a0\u00a0 \u00a0 <!– \u5982\u679cform \u7684action \u9644\u52a0\u4e86\u8bf7\u6c42\u53c2\u6570，\u90a3\u4e48\u8bf7\u6c42\u65b9\u5f0f method \u5fc5\u987b\u662f post –>
\n\u00a0\u00a0 \u00a0 <form action="userController?action=updateuser" method="post">
\n\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0<%–\u9690\u85cf\u57df\u4e2d\u4fdd\u5b58\u4e86\u5f85\u4fee\u6539\u7684\u7528\u6237\u7684 id \u503c –%>
\n\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0<input type="hidden" name="id" value="<%=request.getParameter("id")%>"> <br>
\n\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0\u59d3\u540d：<input type="text" name="name" value="<%=request.getParameter("name")%>"> <br>
\n\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0\u5bc6\u7801：<input type="password" name="pwd" value="<%=request.getParameter("pwd")%>"> <br>
\n\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0\u5e74\u9f84：<input type="text" name="age" value="<%=request.getParameter("age")%>"> <br>
\n\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0\u6027\u522b：<input type="text" name="sex" value="<%=request.getParameter("sex")%>"> <br>
\n\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0<input type="submit" value="\u66f4\u65b0">
\n\u00a0\u00a0 \u00a0 <\/form>
\n<\/body>
\n<\/html><\/p>\n

UserServlet：<\/p>\n

package com.edu.ctrl;<\/p>\n

import java.io.IOException;
\nimport java.util.List;<\/p>\n

import javax.servlet.ServletConfig;
\nimport javax.servlet.ServletException;
\nimport javax.servlet.annotation.WebServlet;
\nimport javax.servlet.http.HttpServlet;
\nimport javax.servlet.http.HttpServletRequest;
\nimport javax.servlet.http.HttpServletResponse;<\/p>\n

import com.edu.beans.User;
\nimport com.edu.service.IUserService;
\nimport com.edu.service.impl.UserServiceImpl;<\/p>\n

@WebServlet("\/userController")
\npublic class UserServlet extends HttpServlet{
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0public UserServlet() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated constructor stub
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void init(ServletConfig config) throws ServletException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bbe\u7f6e\u5b57\u7b26\u7f16\u7801
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.setCharacterEncoding("UTF-8");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0response.setContentType("text\/html;charset=UTF-8");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u83b7\u53d6\u8bf7\u6c42\u7c7b\u578b
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String action = request.getParameter("action");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u4ea7\u751f\u4e1a\u52a1\u5bf9\u8c61(Model)
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0IUserService userService = new UserServiceImpl();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0switch (action) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "getusers":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0List<User> users = userService.getUsers();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.setAttribute("users", users);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bf7\u6c42\u8f6c\u53d1
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.getRequestDispatcher("\/WEB-INF\/show.jsp").forward(request, response);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "deleteuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u4ece\u524d\u7aef\u53d6\u51fa\u5f85\u5220\u9664\u7528\u6237\u7684id
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String tid = request.getParameter("id");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int id = Integer.parseInt(tid);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0userService.delete(id);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u5220\u9664\u4e4b\u540e\u5e94\u8be5\u91cd\u65b0\u53bb\u52a0\u8f7d\u6700\u65b0\u7684\u6570\u636e\u6765\u663e\u793a
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bf7\u6c42\u8f6c\u53d1
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.getRequestDispatcher("\/userController?action=getusers").forward(request, response);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "insertuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u83b7\u53d6\u8868\u5355\u53c2\u6570
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String name = request.getParameter("name");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String pwd = request.getParameter("pwd");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String tage = request.getParameter("age");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int age = Integer.parseInt(tage);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String sex = request.getParameter("sex");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0User user = new User(name, pwd, age, sex);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0userService.save(user);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u589e\u52a0\u4e4b\u540e\u5e94\u8be5\u91cd\u65b0\u53bb\u52a0\u8f7d\u6700\u65b0\u7684\u6570\u636e\u6765\u663e\u793a
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bf7\u6c42\u8f6c\u53d1
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.getRequestDispatcher("\/userController?action=getusers").forward(request, response);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "updateuser":{
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u83b7\u53d6\u8868\u5355\u53c2\u6570
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String tid = request.getParameter("id");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int id = Integer.parseInt(tid);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String name = request.getParameter("name");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String pwd = request.getParameter("pwd");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String tage = request.getParameter("age");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int age = Integer.parseInt(tage);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String sex = request.getParameter("sex");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0User user = new User(id, name, pwd, age, sex);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0userService.update(user);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u66f4\u65b0\u4e4b\u540e\u5e94\u8be5\u91cd\u65b0\u53bb\u52a0\u8f7d\u6700\u65b0\u7684\u6570\u636e\u6765\u663e\u793a
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u8bf7\u6c42\u8f6c\u53d1
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0request.getRequestDispatcher("\/userController?action=getusers").forward(request, response);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0default:
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0doGet(request, response);\/\/\u5982\u679c\u662f POST \u8bf7\u6c42，\u76f4\u63a5\u8c03\u7528 doGet() \u65b9\u6cd5
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0@Override
\n\u00a0\u00a0 \u00a0public void destroy() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0}
\n}<\/p>\n

\u6d4b\u8bd5：<\/p>\n

\"\"<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

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