{"id":54240,"date":"2025-08-13T00:20:26","date_gmt":"2025-08-12T16:20:26","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/54240.html"},"modified":"2025-08-13T00:20:26","modified_gmt":"2025-08-12T16:20:26","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%ba%8c%e5%a4%a9%ef%bc%81servlet","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/54240.html","title":{"rendered":"JavaWeb\u4ece\u5165\u95e8\u5230\u7cbe\u901a\uff01\u7b2c\u4e8c\u5929\uff01(Servlet)"},"content":{"rendered":"<\/p>\n

\u4e00\u3001Servlet<\/h3>\n

1. Java Servlet<\/p>\n

Java Servlet \u662f\u670d\u52a1\u7aef\u7684\u4e00\u4e2a\u6280\u672f，\u662f\u5bf9\u670d\u52a1\u5668\u7684\u4e00\u79cd\u5c0f\u578b\u53ef\u63d2\u62d4\u7684\u6269\u5145，\u7528\u4e8e\u63d0\u9ad8\u670d\u52a1\u5668\u6027\u80fd，\u7531\u4e8e\u4f7f\u7528 Java \u8bed\u8a00\u7f16\u5199，\u6240\u4ee5\u53ef\u4ee5\u8de8\u5e73\u53f0，Servlet \u7684\u5185\u90e8\u4ee5\u591a\u7ebf\u7a0b\u7684\u65b9\u5f0f\u63d0\u4f9b\u670d\u52a1，\u6240\u4ee5\u4e0d\u5fc5\u5bf9\u6bcf\u4e2a\u8bf7\u6c42\u90fd\u53bb\u521b\u5efa\u4e00\u4e2a Servlet \u6765\u5904\u7406，\u5229\u7528\u591a\u7ebf\u7a0b\u65b9\u5f0f\u4e00\u4e2aServlet\u5c31\u53ef\u4ee5\u7ed9\u591a\u4e2a\u8bf7\u6c42\u670d\u52a1，\u6548\u7387\u975e\u5e38\u9ad8\u3002<\/p>\n

2. \u5f00\u53d1 Servlet \u7684\u65b9\u6cd5<\/p>\n

\u8981\u5f00\u53d1\u81ea\u5b9a\u4e49\u7684 Servlet，\u9700\u8981\u7ee7\u627f javax.servlet.GenericServlet(\u539f\u751f\u7684Servlet) \u6216 javax.servlet.http.HttpServlet(\u57fa\u4e8ehttp\u7684Servlet)，\u7136\u540e\u91cd\u5199\u7236\u7c7b\u65b9\u6cd5\u6765\u5b9e\u73b0\u81ea\u5b9a\u4e49 Servlet，\u5176\u4e2dGenericServlet \u662f HttpServlet \u7684\u7236\u7c7b\u3002<\/p>\n

2.1 \u901a\u8fc7\u7ee7\u627f GenericServlet \u5b9e\u73b0\u81ea\u5b9a\u4e49 Servlet<\/p>\n

2.1.1 eclipse \u64cd\u4f5c<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

2.1.2 \u6e90\u7801<\/p>\n

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

import java.io.IOException;
\nimport javax.servlet.GenericServlet;
\nimport javax.servlet.ServletConfig;
\nimport javax.servlet.ServletException;
\nimport javax.servlet.ServletRequest;
\nimport javax.servlet.ServletResponse;
\nimport javax.servlet.annotation.WebServlet;
\nimport javax.servlet.http.HttpServletRequest;<\/p>\n

\/**
\n\u00a0* @WebServlet("\/userServlet")：\u8be5\u6ce8\u89e3\u7684\u4f5c\u7528\u662f\u6307\u5b9a\u8be5 Servlet \u7684 URL \u5730\u5740，\u8ddf\u8bbf\u95ee JSP \u9875\u9762\u7c7b\u4f3c，\u8bbf\u95ee\u8be5 Servlet\u00a0
\n\u00a0* \u7684\u5b8c\u6574 URL \u5730\u5740\u5c31\u662f：http:\/\/localhost:8080\/javaweb2\/userServlet
\n\u00a0*\/
\n@WebServlet("\/userServlet")
\npublic class UserServlet extends GenericServlet {
\n\u00a0\u00a0 \u00a0private static final long serialVersionUID = 1L;
\n\u00a0 \u00a0 \u00a0 \u00a0
\n\u00a0 \u00a0 \/\/UserServlet \u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570，Web \u670d\u52a1\u5668\u5728\u521b\u5efa\u8be5 Servlet \u5b9e\u4f8b\u7684\u65f6\u5019\u8c03\u7528(\u4e0d\u662f\u7a0b\u5e8f\u5458\u624b\u5de5\u8c03\u7528\u7684)
\n\u00a0 \u00a0 public UserServlet() {
\n\u00a0 \u00a0 \u00a0 \u00a0System.out.println("UserServlet \u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u88ab\u8c03\u7528");
\n\u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \/**
\n\u00a0 \u00a0 \u00a0* \u4ee5\u4e0b\u65b9\u90fd\u662f\u8be5 Servlet \u7684\u751f\u547d\u5468\u671f\u65b9\u6cd5，\u7531Web\u670d\u52a1\u5668\u81ea\u52a8\u8c03\u7528，\u4e0d\u662f\u7a0b\u5e8f\u5458\u624b\u52a8\u8c03\u7528\u7684
\n\u00a0 \u00a0 \u00a0* init()：UserServlet \u7684\u521d\u59cb\u5316\u65b9\u6cd5，\u53ef\u4ee5\u5b8c\u6210\u521d\u59cb\u5316，\u8be5\u65b9\u6cd5\u662f\u5728\u5ba2\u6237\u7aef\u7b2c\u4e00\u6b21\u8bf7\u6c42 UserServlet \u7684\u65f6\u5019\u7531\u670d\u52a1\u5668\u8c03\u7528\u4e00\u6b21，
\n\u00a0 \u00a0 \u00a0* \u540e\u7eed\u8bf7\u6c42\u5c31\u4e0d\u518d\u8c03\u7528\u4e86，\u800c\u65b9\u6cd5\u7684\u53c2\u6570 config \u5c31\u662f JSP \u7684\u5185\u7f6e\u5bf9\u8c61 config
\n\u00a0 \u00a0 \u00a0*\/
\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 \u00a0System.out.println("UserServlet \u7684 init() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0 * service()：Servlet \u7684\u6838\u5fc3\u670d\u52a1\u65b9\u6cd5，\u5f53\u5ba2\u6237\u7aef\u8bf7\u6c42\u8be5 Servlet \u7684\u65f6\u5019，\u4f8b\u5982\u53d1\u9001 GET \u6216 POST \u8bf7\u6c42\u5230\u8be5 Servlet \u7684\u65f6\u5019，
\n\u00a0\u00a0 \u00a0 * Web \u670d\u52a1\u5668\u5c31\u4f1a\u8c03\u7528\u8be5 service() \u65b9\u6cd5\u6765\u54cd\u5e94\u5ba2\u6237\u7aef\u8bf7\u6c42\u3002
\n\u00a0\u00a0 \u00a0 * \u8be5\u65b9\u6cd5\u5de5\u4f5c\u5728\u591a\u7ebf\u7a0b\u7684\u73af\u5883\u4e2d，\u5176\u53c2\u6570 request \u548c response \u8868\u793a\u539f\u751f\u7684\u8bf7\u6c42\u548c\u54cd\u5e94\u5bf9\u8c61，\u4e0d\u662f HttpServletRequest \u548c\u00a0
\n\u00a0\u00a0 \u00a0 * HttpServletResponse
\n\u00a0\u00a0 \u00a0 *\/
\n\u00a0\u00a0 \u00a0public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("UserServlet \u7684 service() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println(this);\/\/this \u6307\u5f53\u524d UserServlet \u5b9e\u4f8b\u672c\u8eab
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("\u5f53\u524d\u7ebf\u7a0b：" + Thread.currentThread().getName());
\n\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0
\n\u00a0\u00a0 \u00a0\/\/\u5f53 UserServlet \u88ab\u9500\u6bc1\u7684\u65f6\u5019\u81ea\u52a8\u8c03\u7528\u7684\u65b9\u6cd5
\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("UserServlet \u7684 destroy() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0}<\/p>\n

}<\/p>\n

2.1.3 \u6d4b\u8bd5\u67e5\u770b\u7ed3\u679c<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u4ece\u4e0a\u9762\u6267\u884c\u7ed3\u679c\u53ef\u77e5，\u9ed8\u8ba4\u60c5\u51b5\u4e0b，\u6211\u4eec\u542f\u52a8\u670d\u52a1\u5668\u7684\u65f6\u5019，\u670d\u52a1\u5668\u5e76\u6ca1\u6709\u8c03\u7528 Servlet \u7684\u9ed8\u8ba4\u6784\u9020\u65b9\u6cd5\u6765\u4ea7\u751f\u5b9e\u4f8b\u3002<\/p>\n

\u7136\u540e\u6211\u4eec\u7b2c\u4e00\u6b21\u8bf7\u6c42\u8be5\u9875\u9762：<\/p>\n

\"\"<\/p>\n

\u540e\u7eed\u518d\u53d1\u591a\u6b21\u8bf7\u6c42：<\/p>\n

\"\"<\/p>\n

\u4ece\u4e0a\u9762\u5206\u6790\u53ef\u77e5，\u9ed8\u8ba4\u60c5\u51b5\u4e0b，\u8be5 Servlet \u7684\u5b9e\u4f8b\u662f\u5728\u5ba2\u6237\u7aef\u7b2c\u4e00\u8bf7\u6c42\u5b83\u7684\u65f6\u5019\u7531 Tomcat \u670d\u52a1\u5668\u521b\u5efa，\u5e76\u4e14init()\u4e5f\u662f\u5728\u5ba2\u6237\u7aef\u7b2c\u4e00\u6b21\u8bf7\u6c42\u8be5Servlet\u65f6\u88ab\u8c03\u7528\u4e00\u6b21，\u4ee5\u540e\u8bf7\u6c42\u5c31\u4e0d\u5728\u8c03\u7528\u3002<\/p>\n

service() \u662f\u5728\u5ba2\u6237\u7aef\u6bcf\u4e00\u6b21\u8bf7\u6c42\u7684\u65f6\u5019\u90fd\u4f1a\u88ab Tomcat \u8c03\u7528\u4e00\u6b21，\u6765\u54cd\u5e94\u5ba2\u6237\u7aef\u8bf7\u6c42，\u5e76\u4e14\u53ef\u4ee5\u53d1\u73b0Servlet\u662f\u5355\u4f8b\u591a\u7ebf\u7a0b\u7684\u7ec4\u4ef6，\u6240\u4ee5，Servlet \u4e2d\u6700\u597d\u4e0d\u8981\u5305\u542b\u6210\u5458\u53d8\u91cf，\u56e0\u4e3a\u53ef\u80fd\u4f1a\u6709\u591a\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u3002<\/p>\n

\u7136\u540e\u6211\u4eec\u4fee\u6539\u8be5 Servlet \u518d\u4fdd\u5b58，\u90a3\u4e48\u5e94\u7528\u4f1a\u91cd\u65b0\u52a0\u8f7d Servlet，destroy() \u65b9\u6cd5\u5c31\u88ab\u8c03\u7528\u4e86，\u67e5\u770b\u63a7\u5236\u53f0\u4fe1\u606f：<\/p>\n

\"\"<\/p>\n

2.1.4 Servlet\u7684\u751f\u547d\u5468\u671f\u56fe：<\/p>\n

\"\"<\/p>\n

2.2 \u901a\u8fc7\u7ee7\u627f HttpServlet \u5b9e\u73b0\u81ea\u5b9a\u4e49 Servlet<\/p>\n

javax.servlet.http.HttpServlet \u7ee7\u627f\u4e8e GenericServlet，\u6211\u4eec\u5e73\u65f6\u53bb\u7ee7\u627f HttpServlet \u6765\u81ea\u5b9a\u4e49 Servlet \u7684\u65b9\u5f0f\u7528\u7684\u6bd4\u8f83\u591a\u3002<\/p>\n

\u6709\u4e24\u79cd\u65b9\u5f0f\u6765\u5b9a\u4e49：<\/p>\n

2.2.1 \u901a\u8fc7\u6ce8\u89e3\u7684\u65b9\u5f0f\u6765\u5b9a\u4e49<\/p>\n

HttpUserServlet：<\/p>\n

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

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

\/**
\n\u00a0* @WebServlet("\/httpUserServlet")：\u8be5\u6ce8\u89e3\u7684\u4f5c\u7528\u662f\u6307\u5b9a\u8be5 Servlet \u7684 URL \u5730\u5740，\u8ddf\u8bbf\u95ee JSP \u9875\u9762\u7c7b\u4f3c，\u8bbf\u95ee\u8be5 Servlet\u00a0
\n\u00a0* \u7684\u5b8c\u6574 URL \u5730\u5740\u5c31\u662f：http:\/\/localhost:8080\/javaweb2\/httpUserServlet
\n\u00a0* initParams：\u7528\u4e8e\u5b9a\u4e49\u521d\u59cb\u5316\u53c2\u6570，\u5176\u4e2d\u5305\u542b\u4e86 @WebInitParam \u6ce8\u89e3\u7ec4\u6210\u7684\u6570\u7ec4，\u4ee3\u8868\u6bcf\u4e00\u4e2a\u521d\u59cb\u5316\u53c2\u6570，\u53ef\u4ee5\u901a\u8fc7 init() \u65b9\u6cd5
\n\u00a0* \u7684 config \u5bf9\u8c61\u8bfb\u53d6
\n\u00a0*\/
\n@WebServlet(value = "\/httpUserServlet", initParams = {@WebInitParam(name = "param", value = "\u6ce8\u89e3\u5f0f\u7684\u521d\u59cb\u5316\u53c2\u6570")})
\npublic class HttpUserServlet extends HttpServlet {
\n\u00a0\u00a0 \u00a0private static final long serialVersionUID = 1L;
\n\u00a0 \u00a0\u00a0
\n\u00a0\u00a0 \u00a0\/\/HttpUserServlet \u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570，\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u662f\u5ba2\u6237\u7aef\u7b2c\u4e00\u6b21\u8bf7\u6c42\u8be5 Servlet \u7684\u65f6\u5019\u7531\u670d\u52a1\u5668\u8c03\u7528\u4e00\u6b21
\n\u00a0 \u00a0 public HttpUserServlet() {
\n\u00a0 \u00a0 \u00a0 \u00a0 super();
\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ TODO Auto-generated constructor stub
\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println("HttpUserServlet \u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570");
\n\u00a0 \u00a0 }<\/p>\n

\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0 * \u8be5 Servlet \u7684\u521d\u59cb\u5316\u65b9\u6cd5，\u4e5f\u662f\u5ba2\u6237\u7aef\u7b2c\u4e00\u6b21\u8bf7\u6c42\u8be5 Servlet \u7684\u65f6\u5019\u7531\u670d\u52a1\u5668\u8c03\u7528\u4e00\u6b21，\u5b8c\u6210\u521d\u59cb\u5316\u5de5\u4f5c，
\n\u00a0\u00a0 \u00a0 * \u5176\u53c2\u6570 config \u7528\u4e8e\u8bfb\u53d6\u521d\u59cb\u5316\u53c2\u6570
\n\u00a0\u00a0 \u00a0 *\/
\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 \u00a0System.out.println("HttpUserServlet \u7684 init() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String value = config.getInitParameter("param");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("\u521d\u59cb\u5316\u53c2\u6570：" + value);
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0 * \u6bcf\u6b21 HttpUserServlet \u6536\u5230\u5ba2\u6237\u7aef\u7684 GET \u8bf7\u6c42\u7684\u65f6\u5019，\u8be5\u65b9\u6cd5\u88ab Web \u670d\u52a1\u5668\u8c03\u7528\u4e00\u6b21，\u5176\u53c2\u6570 request \u548c response \u5206\u522b
\n\u00a0\u00a0 \u00a0 * \u8868\u793a\u8bf7\u6c42\u548c\u54cd\u5e94\u5bf9\u8c61，\u5b83\u4eec\u548c JSP \u4e2d\u7684 request \u548c response \u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002
\n\u00a0\u00a0 \u00a0 * \u540c\u65f6 HttpUserServlet \u4e5f\u662f\u5355\u4f8b\u591a\u7ebf\u7a0b\u7684
\n\u00a0\u00a0 \u00a0 *\/
\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 \u00a0System.out.println("HttpUserServlet \u7684 doGet() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println(this);\/\/this \u6307\u5f53\u524d HttpUserServlet \u5b9e\u4f8b\u672c\u8eab
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("\u5f53\u524d\u7ebf\u7a0b:" + Thread.currentThread().getName());
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0 * \u6bcf\u6b21 HttpUserServlet \u6536\u5230\u5ba2\u6237\u7aef\u7684 POST \u8bf7\u6c42\u7684\u65f6\u5019，\u8be5\u65b9\u6cd5\u88ab Web \u670d\u52a1\u5668\u8c03\u7528\u4e00\u6b21，\u5176\u53c2\u6570 request \u548c response \u5206\u522b
\n\u00a0\u00a0 \u00a0 * \u8868\u793a\u8bf7\u6c42\u548c\u54cd\u5e94\u5bf9\u8c61，\u5b83\u4eec\u548c JSP \u4e2d\u7684 request \u548c response \u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002
\n\u00a0\u00a0 \u00a0 * \u540c\u65f6 HttpUserServlet \u4e5f\u662f\u5355\u4f8b\u591a\u7ebf\u7a0b\u7684
\n\u00a0\u00a0 \u00a0 *\/
\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 \u00a0System.out.println("HttpUserServlet \u7684 doPost() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println(this);\/\/this \u6307\u5f53\u524d HttpUserServlet \u5b9e\u4f8b\u672c\u8eab
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println("\u5f53\u524d\u7ebf\u7a0b:" + Thread.currentThread().getName());
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\/\/\u5f53HttpUserServlet \u88ab\u9500\u6bc1\u7684\u65f6\u5019\u8c03\u7528\u7684\u65b9\u6cd5
\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("HttpUserServlet \u7684 destroy() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0}
\n}<\/p>\n

form.jsp：\u7531\u4e8e URL \u5730\u5740\u8f93\u5165，\u4ee5\u53ca\u8d85\u94fe\u63a5\u70b9\u51fb\u90fd\u662f\u5c5e\u4e8e get \u8bf7\u6c42，\u6211\u4eec\u5199\u4e00\u4e2a\u8868\u5355\u6765\u505a post \u8bf7\u6c42<\/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>form<\/title>
\n<\/head>
\n<body>
\n\u00a0\u00a0 \u00a0<form action="httpUserServlet" method="post">
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<input type="submit" value="\u63d0\u4ea4">
\n\u00a0\u00a0 \u00a0<\/form>
\n<\/body>
\n<\/html><\/p>\n

\u6d4b\u8bd5：<\/p>\n

\u542f\u52a8\u670d\u52a1\u5668\u7684\u65f6\u5019\u6ca1\u6709\u521b\u5efa\u8be5Servlet：<\/p>\n

\"\"<\/p>\n

\u7136\u540e\u5728\u6d4f\u89c8\u5668\u5730\u5740\u680f\u8f93\u5165URL\u5730\u5740\u53d1\u9001GET\u8bf7\u6c42：<\/p>\n

\"\"<\/p>\n

\u5de5\u4f5c\u6d41\u7a0b\u548c GenericServlet \u7c7b\u4f3c，\u53ea\u662f\u8fd9\u91cc\u662f doGet() \u65b9\u6cd5\u6765\u54cd\u5e94\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u3002<\/p>\n

\u7136\u540e\u6211\u4eec\u4f7f\u7528\u8868\u5355\u53d1\u9001 POST \u8bf7\u6c42：<\/p>\n

\"\"<\/p>\n

\u5de5\u4f5c\u6d41\u7a0b\u548c GenericServlet \u4e5f\u7c7b\u4f3c，\u53ea\u662f\u662f doPost \u65b9\u6cd5\u6765\u54cd\u5e94<\/p>\n

\u53ef\u4ee5\u770b\u51fa，\u57fa\u4e8e HttpServlet \u7684\u81ea\u5b9a\u4e49 Servle t\u4e5f\u662f\u4e00\u4e2a\u5355\u4f8b\u591a\u7ebf\u7a0b\u7684\u7ec4\u4ef6，\u5b83\u901a\u8fc7\u5b83\u7684 doGet() \u548c doPost() \u65b9\u6cd5\u6765\u54cd\u5e94\u5ba2\u6237\u7aef\u7684 GET \u548c POST \u8bf7\u6c42\u3002<\/p>\n

2.2.2 \u901a\u8fc7 web.xml(\u90e8\u7f72\u63cf\u8ff0\u6587\u4ef6)\u914d\u7f6e\u6587\u4ef6\u6765\u914d\u7f6e Servlet<\/p>\n

\u6ce8\u610f：\u6ce8\u89e3\u65b9\u5f0f\u548c web.xml \u65b9\u5f0f\u914d\u7f6e Servlet \u53ea\u80fd\u4e8c\u9009\u4e00<\/p>\n

\u7b2c\u4e00\u6b65：\u5728\u5de5\u7a0b\u4e0a\u53f3\u952e：<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u7b2c\u4e8c\u6b65：\u5220\u9664 HttpUserServlet \u7684\u6ce8\u89e3\u914d\u7f6e，\u7136\u540e\u5728 web.xml \u4e2d\u914d\u7f6e：<\/p>\n

\"\"<\/p>\n

\u6d4b\u8bd5：<\/p>\n

\"\"<\/p>\n

\u8fc7\u7a0b\u548c\u6ce8\u89e3\u65b9\u5f0f\u4e00\u6837，\u4ece\u8fd0\u884c\u7684\u65e5\u5fd7\u4fe1\u606f\u53ef\u4ee5\u770b\u51fa，Servlet \u9ed8\u8ba4\u60c5\u51b5\u4e0b\u662f\u5728\u7528\u6237\u7b2c\u4e00\u6b21\u53d1\u9001\u8bf7\u6c42\u4e4b\u540e\u624d\u53bb\u5b9e\u4f8b\u5316\u548c\u521d\u59cb\u5316，\u800c\u4e0d\u662f\u5728\u670d\u52a1\u5668\u542f\u52a8\u65f6\u5c31\u5b9e\u4f8b\u5316，\u8fd9\u6837\u53ef\u4ee5\u8282\u7ea6\u5185\u5b58，\u4f46\u662f\u7b2c\u4e00\u6b21\u54cd\u5e94\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u901f\u5ea6\u53d8\u6162\u4e86，\u5c5e\u4e8e\u65f6\u95f4\u6362\u7a7a\u95f4\u3002\u5f53\u7136\u6211\u4eec\u4e5f\u53ef\u4ee5\u5c06\u5176\u914d\u7f6e\u6210\u670d\u52a1\u5668\u542f\u52a8\u65f6\u5c31\u5b9e\u4f8b\u5316\u3002<\/p>\n

\u7136\u540e HttpServle t\u9664\u4e86\u6709 doGet() \u548c doPost() \u65b9\u6cd5\u4e4b\u5916，\u8fd8\u6709\u5982\u4e0b\u65b9\u6cd5\u5bf9\u5e94 HTTP \u7684\u4e0d\u540c\u8bf7\u6c42\u65b9\u5f0f：<\/p>\n

doGet()：\u5904\u7406 GET \u8bf7\u6c42，doPost()：\u5904\u7406 POST \u8bf7\u6c42，doPut()：\u5904\u7406 PUT \u8bf7\u6c42，doDelete()：\u5904\u7406 DELETE \u8bf7\u6c42，doHead()：\u5904\u7406 HEAD \u8bf7\u6c42，doOptions()：\u5904\u7406 OPTIONS \u8bf7\u6c42，doTrace()：\u5904\u7406 TRACE \u8bf7\u6c42\u3002<\/p>\n

2.2.2.1 \u521d\u59cb\u5316\u53c2\u6570<\/p>\n

Servlet \u5b9e\u4f8b\u5728\u6ca1\u6709\u5904\u7406\u4efb\u4f55\u8bf7\u6c42\u4e4b\u524d，init() \u65b9\u6cd5\u4f1a\u88ab\u8c03\u7528\u4e00\u6b21，\u6765\u5b8c\u6210\u8be5 Servlet \u7684\u521d\u59cb\u5316\u5de5\u4f5c，\u8be5\u65b9\u6cd5\u5305\u542b\u7684\u53c2\u6570\u5c31\u662f\u521d\u59cb\u5316\u53c2\u6570，\u521d\u59cb\u5316\u53c2\u6570\u53ef\u4ee5\u5728web.xml\u4e2d\u914d\u7f6e：<\/p>\n

\u793a\u4f8b：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 HttpUserServlet –>
\n\u00a0 <servlet>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u914d\u7f6e\u8be5Servlet \u7684\u540d\u79f0，\u540d\u79f0\u968f\u610f –>
\n\u00a0 \u00a0\u00a0 \u00a0<servlet-name>HttpUserServlet<\/servlet-name>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u914d\u7f6e\u8be5 Servlet \u7684\u5b8c\u6574\u7c7b\u540d –>
\n\u00a0 \u00a0\u00a0 \u00a0<servlet-class>com.edu.ctrl.HttpUserServlet<\/servlet-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<!– \u53c2\u6570\u540d –>
\n\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<param-name>param1<\/param-name>
\n\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<!– \u53c2\u6570\u503c –>
\n\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<param-value>\u5728 web.xml \u4e2d\u914d\u7f6e\u7684\u521d\u59cb\u5316\u53c2\u65701<\/param-value>
\n\u00a0 \u00a0\u00a0 \u00a0<\/init-param>
\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<!– \u53c2\u6570\u540d –>
\n\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<param-name>param2<\/param-name>
\n\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<!– \u53c2\u6570\u503c –>
\n\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<param-value>\u5728 web.xml \u4e2d\u914d\u7f6e\u7684\u521d\u59cb\u5316\u53c2\u65702<\/param-value>
\n\u00a0 \u00a0\u00a0 \u00a0<\/init-param>
\n\u00a0 <\/servlet>
\n\u00a0 <!– \u914d\u7f6e HttpUserServlet \u7684 URL \u5730\u5740\u6620\u5c04 –>
\n\u00a0 <servlet-mapping>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u914d\u7f6e\u8be5Servlet \u7684\u540d\u79f0，\u540d\u79f0\u9700\u8981\u548c\u4e0a\u9762\u7684\u4e00\u81f4 –>
\n\u00a0 \u00a0\u00a0 \u00a0<servlet-name>HttpUserServlet<\/servlet-name>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u914d\u7f6e HttpUserServlet \u90e8\u7f72\u5230 Tomcat \u7684URL \u5730\u5740，\u5b8c\u6574\u5730\u5740：http:\/\/localhost:8080\/javaweb2\/httpUserServlet \u00a0–>
\n\u00a0 \u00a0\u00a0 \u00a0<url-pattern>\/httpUserServlet<\/url-pattern>
\n\u00a0 <\/servlet-mapping>
\n<\/web-app><\/p>\n

\u7136\u540e\u5728 HttpUserServlet \u7684 init() \u65b9\u6cd5\u4e2d\u8bfb\u53d6：<\/p>\n

\"\"<\/p>\n

\u8bf7\u6c42\u8be5Servlet \u770b\u4e00\u4e0b：<\/p>\n

\"\"<\/p>\n

2.2.2.2 \u542f\u52a8\u88c5\u5165\u4f18\u5148\u7ea7<\/p>\n

\u542f\u52a8\u88c5\u5165\u4f18\u5148\u7ea7\u662f\u6307 Servlet\u5bb9\u5668(Tomcat\u670d\u52a1\u5668) \u5728\u542f\u52a8\u7684\u65f6\u5019\u52a0\u8f7d Servlet \u7684\u4f18\u5148\u987a\u5e8f，\u6211\u4eec\u53ef\u4ee5\u5728 web.xml \u4e2d\u914d\u7f6e\u6765\u6307\u660e\u542f\u52a8\u88c5\u5165\u4f18\u5148\u7ea7，\u503c\u8d8a\u5c0f，\u4f18\u5148\u7ea7\u8d8a\u9ad8，\u542f\u52a8\u7684\u65f6\u5019\u8d8a\u9760\u524d\u3002<\/p>\n

\u793a\u4f8b：web.xml<\/p>\n

\"\"<\/p>\n

\u6d4b\u8bd5：\u542f\u52a8\u670d\u52a1\u5668，\u4f46\u662f\u4e0d\u53bb\u8bf7\u6c42 HttpUserServlet：<\/p>\n

\"\"<\/p>\n

\u53ef\u4ee5\u770b\u51fa，\u6211\u4eec\u628a\u542f\u52a8\u4f18\u5148\u7ea7\u8bbe\u7f6e\u4e3a 1 \u7684\u65f6\u5019，\u5728\u670d\u52a1\u5668\u542f\u52a8\u7684\u65f6\u5019，\u8fd8\u6ca1\u6709\u53d1\u51fa\u7b2c\u4e00\u6b21\u8bf7\u6c42\u5230\u8be5 Servle t\u7684\u65f6\u5019，\u8be5 Servlet \u5c31\u5df2\u7ecf\u88ab\u5b9e\u4f8b\u5316\u548c\u521d\u59cb\u5316，\u8fd9\u6837\u5c5e\u4e8e\u7a7a\u95f4\u6362\u65f6\u95f4，\u5373\u6211\u4eec\u7b2c\u4e00\u6b21\u53bb\u8bf7\u6c42\u8be5 Servlet \u7684\u65f6\u5019\u901f\u5ea6\u52a0\u5feb\u4e86\u3002<\/p>\n

3. Servlet \u7684\u8bf7\u6c42\u548c\u54cd\u5e94<\/p>\n

3.1 \u4e0a\u9762\u7684 GenericServlet \u7684 service() \u65b9\u6cd5\u5305\u542b\u4e24\u4e2a\u53c2\u6570：<\/p>\n

\"\"<\/p>\n

3.2 ServletRequest \u5bf9\u8c61<\/p>\n

\u8868\u793a\u539f\u751f\u7684\u8bf7\u6c42\u5bf9\u8c61，\u5f53 Servlet \u63a5\u6536\u5230\u4e00\u4e2a\u8bf7\u6c42\u65f6，\u7531 Servlet \u5bb9\u5668(Tomcat\u670d\u52a1\u5668)\u521b\u5efa request \u5bf9\u8c61\u5e76\u4f20\u9012\u7ed9service() \u65b9\u6cd5\u53c2\u6570\u3002<\/p>\n

3.2.1 \u5e38\u7528\u65b9\u6cd5：<\/p>\n

1. public int getContentLength()：\u83b7\u53d6\u8bf7\u6c42\u6570\u636e\u90e8\u5206\u7684\u957f\u5ea6<\/p>\n

2. pubic String getContentType()：\u83b7\u53d6 MIME \u7c7b\u578b<\/p>\n

3. public String getParamter(String name)：\u83b7\u53d6\u8bf7\u6c42\u53c2\u6570\/\u8868\u5355\u53c2\u6570<\/p>\n

4. public String[] getParamterValues(String name)：\u83b7\u53d6\u8bf7\u6c42\u53c2\u6570\u503c\u7ec4\u6210\u7684\u6570\u7ec4\u3002<\/p>\n

5. public String getRemoteAddr()：\u83b7\u53d6\u8fdc\u7a0b\u4e3b\u673aIP\u5730\u5740<\/p>\n

6. public String getServerName()：\u83b7\u53d6Servlet\u5bb9\u5668（Tomcat\u670d\u52a1\u5668）\u7684\u540d\u79f0<\/p>\n

7. public int getServerPort()：\u8fd4\u56de\u670d\u52a1\u5668\u76d1\u542c\u7684\u7aef\u53e3\u53f7<\/p>\n

3.3 HttpServletRequest \u5bf9\u8c61<\/p>\n

\u8868\u793a request \u5bf9\u8c61，HttpServlet \u7684 doGet() \u548c doPost() \u65b9\u6cd5\u90fd\u5305\u542b\u8fd9\u4e2a\u53c2\u6570，\u8fd9\u4e2a\u53c2\u6570\u4e5f\u662f\u5f53 HttpServlet \u63a5\u6536\u5230\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u65f6\u5019\u7531 Servlet \u5bb9\u5668\u521b\u5efa\u5e76\u4f20\u9012\u7ed9 doGet() \u548c doPost() \u65b9\u6cd5\u53c2\u6570\u3002\u5176\u4e2d HttpServletRequest \u7ee7\u627f\u4e8e ServletRequest，\u5e76\u4e14\u8fd8\u6269\u5c55\u4e86\u4e00\u4e9b\u65b9\u6cd5：<\/p>\n

3.3.1 \u5e38\u7528\u65b9\u6cd5<\/p>\n

1. public String getAuthType()：\u8fd4\u56de\u5ba2\u6237\u7aef\u91c7\u7528\u7684\u8eab\u4efd\u9a8c\u8bc1\u65b9\u6848（\u5982BASIC\u6216SSL）<\/p>\n

2. public Cookie[] getCookies()：\u8fd4\u56deCookie\u7ec4\u6210\u7684\u6570\u7ec4<\/p>\n

3. public String getHeader(String name)：\u8fd4\u56de\u8bf7\u6c42\u5934\u7684\u503c<\/p>\n

4. public Enumeration getHeaders(String name)：\u8fd4\u56de\u8bf7\u6c42\u5934\u7ec4\u6210\u7684\u6570\u7ec4<\/p>\n

5. public long getDateHeader(String name),public int getIntHeader(String name)：\u8bfb\u53d6\u6307\u5b9a\u7684\u8bf7\u6c42\u5934\u7684\u503c，\u5206\u522b\u8f6c\u6362\u4e3aDate\u548cint\u7c7b\u578b<\/p>\n

6. public String getRequestURI()：\u8fd4\u56de\u8bf7\u6c42\u7684URI\u5730\u5740<\/p>\n

7. public StringBuffer getRequestURL()：\u8fd4\u56de\u8bf7\u6c42\u7684URL\u5730\u5740<\/p>\n

8. public String getServletPath()：\u8fd4\u56de\u6b63\u5728\u88ab\u8c03\u7528\u7684Servlet\u8def\u5f84<\/p>\n

9. public String getContextPath()：\u83b7\u53d6\u5de5\u7a0b\u4e0a\u4e0b\u6587\u8def\u5f84<\/p>\n

10. public String getMethod()：\u83b7\u53d6\u8bf7\u6c42\u7684\u65b9\u5f0f，GET，POST\u6216PUT\u7b49\u7b49<\/p>\n

\u793a\u4f8b：HttpUserServlet.java<\/p>\n

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

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

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

public class HttpUserServlet extends HttpServlet {
\n\u00a0\u00a0 \u00a0private static final long serialVersionUID = 1L;
\n\u00a0 \u00a0\u00a0
\n\u00a0\u00a0 \u00a0\/\/HttpUserServlet \u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570，\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u662f\u5ba2\u6237\u7aef\u7b2c\u4e00\u6b21\u8bf7\u6c42\u8be5 Servlet \u7684\u65f6\u5019\u7531\u670d\u52a1\u5668\u8c03\u7528\u4e00\u6b21
\n\u00a0 \u00a0 public HttpUserServlet() {
\n\u00a0 \u00a0 \u00a0 \u00a0 super();
\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ TODO Auto-generated constructor stub
\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println("HttpUserServlet \u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570");
\n\u00a0 \u00a0 }<\/p>\n

\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0 * \u8be5 Servlet \u7684\u521d\u59cb\u5316\u65b9\u6cd5，\u4e5f\u662f\u5ba2\u6237\u7aef\u7b2c\u4e00\u6b21\u8bf7\u6c42\u8be5 Servlet \u7684\u65f6\u5019\u7531\u670d\u52a1\u5668\u8c03\u7528\u4e00\u6b21，\u5b8c\u6210\u521d\u59cb\u5316\u5de5\u4f5c，
\n\u00a0\u00a0 \u00a0 * \u5176\u53c2\u6570 config \u7528\u4e8e\u8bfb\u53d6\u521d\u59cb\u5316\u53c2\u6570
\n\u00a0\u00a0 \u00a0 *\/
\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 \u00a0System.out.println("HttpUserServlet \u7684 init() \u65b9\u6cd5");
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0 * \u6bcf\u6b21 HttpUserServlet \u6536\u5230\u5ba2\u6237\u7aef\u7684 GET \u8bf7\u6c42\u7684\u65f6\u5019，\u8be5\u65b9\u6cd5\u88ab Web \u670d\u52a1\u5668\u8c03\u7528\u4e00\u6b21，\u5176\u53c2\u6570 request \u548c response \u5206\u522b
\n\u00a0\u00a0 \u00a0 * \u8868\u793a\u8bf7\u6c42\u548c\u54cd\u5e94\u5bf9\u8c61，\u5b83\u4eec\u548c JSP \u4e2d\u7684 request \u548c response \u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002
\n\u00a0\u00a0 \u00a0 * \u540c\u65f6 HttpUserServlet \u4e5f\u662f\u5355\u4f8b\u591a\u7ebf\u7a0b\u7684
\n\u00a0\u00a0 \u00a0 *\/
\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\/\/\u83b7\u53d6 out \u5bf9\u8c61
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0PrintWriter out = response.getWriter();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String requestURI = request.getRequestURI();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0out.println("requestURI:" + requestURI);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0StringBuffer requestURL = request.getRequestURL();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0out.println("requestURL:" + requestURL);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String servletPath = request.getServletPath();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0out.println("servletPath:" + servletPath);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String contextPath = request.getContextPath();
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0out.println("contextPath:" + contextPath);
\n\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\/**
\n\u00a0\u00a0 \u00a0 * \u6bcf\u6b21 HttpUserServlet \u6536\u5230\u5ba2\u6237\u7aef\u7684 POST \u8bf7\u6c42\u7684\u65f6\u5019，\u8be5\u65b9\u6cd5\u88ab Web \u670d\u52a1\u5668\u8c03\u7528\u4e00\u6b21，\u5176\u53c2\u6570 request \u548c response \u5206\u522b
\n\u00a0\u00a0 \u00a0 * \u8868\u793a\u8bf7\u6c42\u548c\u54cd\u5e94\u5bf9\u8c61，\u5b83\u4eec\u548c JSP \u4e2d\u7684 request \u548c response \u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002
\n\u00a0\u00a0 \u00a0 * \u540c\u65f6 HttpUserServlet \u4e5f\u662f\u5355\u4f8b\u591a\u7ebf\u7a0b\u7684
\n\u00a0\u00a0 \u00a0 *\/
\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}<\/p>\n

\u00a0\u00a0 \u00a0\/\/\u5f53HttpUserServlet \u88ab\u9500\u6bc1\u7684\u65f6\u5019\u8c03\u7528\u7684\u65b9\u6cd5
\n\u00a0\u00a0 \u00a0public void destroy() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0}
\n}
\n\u00a0<\/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 HttpUserServlet –>
\n\u00a0 <servlet>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u914d\u7f6e\u8be5Servlet \u7684\u540d\u79f0，\u540d\u79f0\u968f\u610f –>
\n\u00a0 \u00a0\u00a0 \u00a0<servlet-name>HttpUserServlet<\/servlet-name>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u914d\u7f6e\u8be5 Servlet \u7684\u5b8c\u6574\u7c7b\u540d –>
\n\u00a0 \u00a0\u00a0 \u00a0<servlet-class>com.edu.ctrl.HttpUserServlet<\/servlet-class>
\n\u00a0\u00a0 \u00a0<!– \u542f\u52a8\u88c5\u5165\u4f18\u5148\u7ea7\u4e3a 1，\u662f\u4e00\u4e2a\u6bd4\u8f83\u5c0f\u7684\u6570，\u4f18\u5148\u7ea7\u5c31\u6bd4\u8f83\u9ad8 –>
\n\u00a0\u00a0 \u00a0<load-on-startup>1<\/load-on-startup>
\n\u00a0 <\/servlet>
\n\u00a0 <!– \u914d\u7f6e HttpUserServlet \u7684 URL \u5730\u5740\u6620\u5c04 –>
\n\u00a0 <servlet-mapping>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u914d\u7f6e\u8be5Servlet \u7684\u540d\u79f0，\u540d\u79f0\u9700\u8981\u548c\u4e0a\u9762\u7684\u4e00\u81f4 –>
\n\u00a0 \u00a0\u00a0 \u00a0<servlet-name>HttpUserServlet<\/servlet-name>
\n\u00a0 \u00a0\u00a0 \u00a0<!– \u914d\u7f6e HttpUserServlet \u90e8\u7f72\u5230 Tomcat \u7684URL \u5730\u5740，\u5b8c\u6574\u5730\u5740：http:\/\/localhost:8080\/javaweb2\/httpUserServlet \u00a0–>
\n\u00a0 \u00a0\u00a0 \u00a0<url-pattern>\/httpUserServlet<\/url-pattern>
\n\u00a0 <\/servlet-mapping>
\n<\/web-app><\/p>\n

\u6d4b\u8bd5：\u76f4\u63a5\u8bf7\u6c42 HttpUserServlet：<\/p>\n

\"\"<\/p>\n

3.4 ServletResponse \u5bf9\u8c61<\/p>\n

\u8868\u793a\u539f\u751f\u7684\u54cd\u5e94\u5bf9\u8c61，\u4e5f\u662f\u7531 Servlet \u5bb9\u5668\u81ea\u52a8\u8d4b\u503c\u7684<\/p>\n

3.4.1 \u5e38\u7528\u65b9\u6cd5<\/p>\n

1. public String getContentType()：\u83b7\u53d6\u54cd\u5e94\u5934\u7684MIME\u7c7b\u578b<\/p>\n

2. public String getCharacterEncoding()：\u83b7\u53d6\u54cd\u5e94\u7684\u5b57\u7b26\u7f16\u7801<\/p>\n

3. public void setContentType(String type)：\u8bbe\u7f6e\u54cd\u5e94\u5934\u7684MIME\u7c7b\u578b\u4ee5\u53ca\u5b57\u7b26\u7f16\u7801<\/p>\n

3.5 HttpServletResponse \u5bf9\u8c61<\/p>\n

\u5373 response \u5bf9\u8c61，\u7ee7\u627f\u4e8e ServletResponse<\/p>\n

3.5.1 \u5e38\u7528\u7684\u65b9\u6cd5<\/p>\n

1. public void addCookie(Cookie cookie)：\u6dfb\u52a0\u4e00\u4e2aCookie<\/p>\n

2. public void sendError(int sc)：\u6309\u7167\u6307\u5b9a\u7684\u72b6\u6001\u7801\u8fd4\u56de\u4e00\u4e2a\u51fa\u9519\u6d88\u606f\u7ed9\u5ba2\u6237\u7aef<\/p>\n

3. public void sendError(int sc, String message)：\u6309\u7167\u6307\u5b9a\u7684\u72b6\u6001\u7801\u548c\u51fa\u9519\u4fe1\u606f\u8fd4\u56de\u4e00\u4e2a\u51fa\u9519\u6d88\u606f\u7ed9\u5ba2\u6237\u7aef<\/p>\n

\u5e38\u89c1\u7684\u72b6\u6001\u7801：<\/p>\n

\"\"<\/p>\n

4. public void sendRedirect(String location)：\u91cd\u5b9a\u5411<\/p>\n

5. public void setHeader(String name,String value)：\u8bbe\u7f6e\u54cd\u5e94\u5934<\/p>\n

6. pubic void setStatus(int sc)：\u8bbe\u7f6e\u72b6\u6001\u7801，\u4f8b\u5982：response.setStatus(response.SC_OK);<\/p>\n

7. public void flushBuffer()：\u5237\u65b0\u7f13\u51b2\u533a<\/p>\n

8. public void int getBufferSize()：\u83b7\u53d6\u7f13\u51b2\u533a\u5927\u5c0f<\/p>\n

9. public void setBufferSize()：\u8bbe\u7f6e\u7f13\u51b2\u533a\u5927\u5c0f<\/p>\n

\u793a\u4f8b：\u6539\u8fdb\u4e4b\u540e\u7684\u767b\u5f55<\/p>\n

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

\"\"<\/p>\n

2. \u521b\u5efa JavaBean，\u8981\u6c42 JavaBean \u7684\u5c5e\u6027\u540d\u8981\u548c\u8868\u7684\u5b57\u6bb5\u540c\u540d，\u56e0\u4e3a\u540e\u9762\u6211\u4eec\u7684\u5de5\u5177\u7c7b DbHelper \u8981\u7528\u5230\u53cd\u5c04<\/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}
\n\u00a0<\/p>\n

3. \u7ed9 Web \u5de5\u7a0b\u5bfc\u5165 mysql \u9a71\u52a8，\u6211\u4eec\u9700\u8981\u5c06 mysql \u7684\u9a71\u52a8\u62f7\u8d1d\u5230 Web \u5de5\u7a0b\u7684 WEB-INF\/lib \u76ee\u5f55，\u56e0\u4e3aWeb \u5de5\u7a0b\u5728\u8fd0\u884c\u7684\u65f6\u5019\u4f1a\u53bb WEB-INF\/lib \u76ee\u5f55\u4e2d\u53bb\u627e\u7b2c\u4e09\u65b9\u7684 jar \u5305，\u6240\u4ee5\u5fc5\u987b\u8981\u653e\u5728 WEB-INF\/lib \u76ee\u5f55\u4e2d\u3002<\/p>\n

eclipse \u4f1a\u81ea\u52a8\u5c06 WEB-INF\/lib \u76ee\u5f55\u4e2d\u7684 jar \u5305\u6dfb\u52a0\u5230\u5de5\u7a0b\u6784\u5efa\u8def\u5f84\u4e2d，\u4e0d\u8981\u81ea\u5df1\u53bb\u6dfb\u52a0<\/p>\n

\"\"<\/p>\n

3. \u62f7\u8d1d\u4e4b\u524d\u5199\u7684 ConnectionFactory \u4ee5\u53ca DbHelper \u5de5\u5177\u7c7b\u5230\u5f53\u524d\u5de5\u7a0b\u4e2d：<\/p>\n

\"\"<\/p>\n

5. \u767b\u5f55\u9875\u9762 login.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>\u767b\u5f55\u9875\u9762<\/title>
\n<\/head>
\n<body>
\n\u00a0\u00a0 \u00a0<%–
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u6211\u4eec\u7ed9\u8868\u5355\u8bf7\u6c42\u7684 Servlet \u7684 URL \u5730\u5740\u540e\u62fc\u63a5\u4e00\u4e2a\u8bf7\u6c42\u53c2\u6570 action=login \u6765\u6307\u660e\u5f53\u524d\u7684\u8bf7\u6c42\u662f\u767b\u5f55\u8bf7\u6c42，\u540c\u7406，
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u5176\u4ed6\u7684\u8bf7\u6c42(\u4f8b\u5982\u67e5\u8be2\u7528\u6237\u8bf7\u6c42，\u5220\u9664\u7528\u6237\u8bf7\u6c42\u7b49\u7b49），\u4e5f\u53ef\u4ee5\u7528\u8fd9\u79cd\u65b9\u5f0f\u6765\u8bf7\u6c42\u8be5 Servlet，\u7531\u4e8e Servlet \u662f\u5355\u4f8b\u591a\u7ebf\u7a0b\u7684，
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a Servlet \u6765\u54cd\u5e94\u7528\u6237\u7684\u4e0d\u540c\u8bf7\u6c42，\u800c\u4e0d\u662f\u6bcf\u4e2a\u4e0d\u540c\u7684\u8bf7\u6c42\u90fd\u53bb\u521b\u5efa\u4e00\u4e2a Servlet \u6765\u5904\u7406\u3002
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u6ce8\u610f：\u5982\u679c form \u7684 action \u5c5e\u6027\u9644\u52a0\u4e86\u8bf7\u6c42\u53c2\u6570，\u5219 method \u4e0d\u80fd\u4f7f get，\u56e0\u4e3a\u8981\u62a5\u9519，\u53ea\u80fd\u662f post
\n\u00a0\u00a0 \u00a0 –%>
\n\u00a0\u00a0 \u00a0<form action="httpUserServlet?action=login" method="post">
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<%–\u8868\u5355\u5143\u7d20，\u6211\u4eec\u7684\u8bf7\u6c42\u53c2\u6570\u5c31\u662f\u8fd9\u4e9b\u8868\u5355\u5143\u7d20\u7684\u503c –%>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u59d3\u540d：<input type="text" name="name"> <br>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u5bc6\u7801：<input type="password" name="pwd"> <br>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<br>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<input type="submit" value="\u767b\u5f55">
\n\u00a0\u00a0 \u00a0<\/form>
\n\u00a0\u00a0 \u00a0<div style="color:red;"><%=session.getAttribute("errormsg")==null ?"":session.getAttribute("errormsg")%><\/div>
\n\u00a0\u00a0 \u00a0<%–\u5237\u65b0\u9875\u9762\u65f6，\u4e0d\u80fd\u518d\u663e\u793a\u51fa\u9519\u4fe1\u606f，\u8fd9\u91cc\u5c31\u662f\u5c06 session \u57df\u7684\u51fa\u9519\u4fe1\u606f\u5220\u9664 –%>
\n\u00a0\u00a0 \u00a0<%session.removeAttribute("errormsg"); %>
\n<\/body>
\n<\/html><\/p>\n

6. \u521b\u5efa HttpUserServlet：<\/p>\n

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

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

import javax.servlet.ServletConfig;
\nimport javax.servlet.ServletException;
\nimport javax.servlet.annotation.WebInitParam;
\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.utils.DbHelper;<\/p>\n

@WebServlet("\/httpUserServlet")
\npublic class HttpUserServlet extends HttpServlet {
\n\u00a0\u00a0 \u00a0private static final long serialVersionUID = 1L;
\n\u00a0 \u00a0\u00a0
\n\u00a0\u00a0 \u00a0\/\/HttpUserServlet \u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570，\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u662f\u5ba2\u6237\u7aef\u7b2c\u4e00\u6b21\u8bf7\u6c42\u8be5 Servlet \u7684\u65f6\u5019\u7531\u670d\u52a1\u5668\u8c03\u7528\u4e00\u6b21
\n\u00a0 \u00a0 public HttpUserServlet() {
\n\u00a0 \u00a0 \u00a0 \u00a0 super(); \u00a0
\n\u00a0 \u00a0 }<\/p>\n

\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
\n\u00a0\u00a0 \u00a0}<\/p>\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 \u00a0doPost(request, response);\u00a0\u00a0 \u00a0\/\/\u5ba2\u6237\u7aef\u5982\u679c\u53d1 GET \u8bf7\u6c42，\u4e5f\u53bb\u8bf7\u6c42 doPost()
\n\u00a0\u00a0 \u00a0}<\/p>\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 \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\u524d\u7aef\u9875\u9762\u53d1\u9001\u8fc7\u6765\u7684 action \u8bf7\u6c42\u53c2\u6570\u6765\u5224\u65ad\u662f\u54ea\u4e00\u79cd\u8bf7\u6c42
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0String action = request.getParameter("action");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0switch (action) {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "login": {\/\/\u5904\u7406\u767b\u5f55\u8bf7\u6c42
\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 String name = request.getParameter("name");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 String pwd = request.getParameter("pwd");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 String sql = "select * from users where name=? and pwd=?";
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 User user = DbHelper.getBean(User.class, sql, name, pwd);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if(user == null) { \/\/\u6ca1\u627e\u5230\u8bb0\u5f55，\u767b\u5f55\u5931\u8d25
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/\u5f80session\u57df\u4e2d\u653e\u5165errormsg\u4fe1\u606f
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 request.getSession().setAttribute("errormsg", "\u7528\u6237\u540d\u6216\u5bc6\u7801\u9519\u8bef，\u8bf7\u91cd\u65b0\u767b\u5f55!");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/\u91cd\u5b9a\u5411\u5230\u767b\u5f55\u9875
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 response.sendRedirect("login.jsp");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }else { \/\/\u5426\u5219\u5c31\u767b\u5f55\u6210\u529f
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/\u767b\u5f55\u6210\u529f\u5c31\u5c06\u7528\u6237\u7684\u6240\u6709\u4fe1\u606f\u67e5\u8be2\u51fa\u6765\u901a\u8fc7\u8868\u683c\u663e\u793a
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 String sql2 = "select * from users";
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 List<User> users = DbHelper.getList(User.class, sql2, null);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/\u5c06users\u653e\u5165session\u57df
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 request.getSession().setAttribute("users", users);
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 request.getSession().setAttribute("name", user.getName());\/\/\u5728\u653e\u5165\u767b\u5f55\u6210\u529f\u7684\u7528\u6237\u540d
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/\u91cd\u5b9a\u5411\u5230\u4e3b\u9875\u663e\u793a\u7528\u6237\u4fe1\u606f
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 response.sendRedirect("index.jsp");
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0break;
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0case "getusers": {\/\/\u5904\u7406\u83b7\u53d6\u7528\u6237\u4fe1\u606f\u8bf7\u6c42
\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": {\/\/\u5904\u7406\u5f55\u5165\u7528\u6237\u4fe1\u606f\u8bf7\u6c42
\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 "deleteuser": {\/\/\u5904\u7406\u5220\u9664\u7528\u6237\u4fe1\u606f
\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": {\/\/\u5904\u7406\u66f4\u65b0\u7528\u6237\u4fe1\u606f\u8bf7\u6c42
\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}<\/p>\n

\u00a0\u00a0 \u00a0\/\/\u5f53HttpUserServlet \u88ab\u9500\u6bc1\u7684\u65f6\u5019\u8c03\u7528\u7684\u65b9\u6cd5
\n\u00a0\u00a0 \u00a0public void destroy() {
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/ TODO Auto-generated method stub
\n\u00a0\u00a0 \u00a0}
\n}<\/p>\n

7. index.jsp：<\/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<h1>\u6b22\u8fce\u56de\u6765：<%=session.getAttribute("name") %><\/h1>
\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>)session.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

8. \u6d4b\u8bd5：<\/p>\n

\u5148\u6d4b\u8bd5\u767b\u5f55\u5931\u8d25：<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u7136\u540e\u4ee5\u6b63\u786e\u7528\u6237\u5bc6\u7801\u767b\u5f55：<\/p>\n

\"\"<\/p>\n

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

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