\n| Modifier<\/td>\n | \u63d0\u4f9b\u65b9\u6cd5\u89e3\u6790\u7c7b\u548c\u6210\u5458\u7684\u4fee\u9970\u7b26（\u5982 public\u3001private）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u8fd9\u4e9b\u7c7b\u5171\u540c\u534f\u4f5c，\u8ba9\u6211\u4eec\u80fd\u591f\u5728\u8fd0\u884c\u65f6\u64cd\u4f5c\u7c7b\u7684\u5404\u79cd\u6210\u5458\u3002<\/p>\n \u53cd\u5c04\u7684\u5165\u53e3：Class \u5bf9\u8c61<\/h3>\nClass\u7c7b\u662f\u53cd\u5c04\u7684\u6838\u5fc3，\u6bcf\u4e2a\u7c7b\u5728 JVM \u4e2d\u90fd\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684Class\u5bf9\u8c61，\u5b83\u5305\u542b\u4e86\u8be5\u7c7b\u7684\u6240\u6709\u4fe1\u606f\u3002\u83b7\u53d6Class\u5bf9\u8c61\u6709\u4e09\u79cd\u65b9\u5f0f：<\/p>\n \u65b9\u5f0f 1：\u901a\u8fc7Class.forName()\u65b9\u6cd5（\u6700\u5e38\u7528）<\/h4>\ntry {
\n \/\/ \u53c2\u6570：\u7c7b\u7684\u5168\u9650\u5b9a\u540d（\u5305\u540d+\u7c7b\u540d）
\n Class<?> clazz = Class.forName("com.example.User");
\n System.out.println("\u83b7\u53d6\u5230\u7684Class\u5bf9\u8c61：" + clazz);
\n} catch (ClassNotFoundException e) {
\n e.printStackTrace();
\n}<\/p>\n \u8fd9\u79cd\u65b9\u5f0f\u6700\u7075\u6d3b，\u4e0d\u9700\u8981\u5728\u7f16\u8bd1\u671f\u77e5\u9053\u5177\u4f53\u7c7b\u540d，\u53ef\u4ee5\u901a\u8fc7\u5b57\u7b26\u4e32\u52a8\u6001\u52a0\u8f7d\u7c7b（\u5e38\u7528\u4e8e\u914d\u7f6e\u6587\u4ef6\u4e2d\u6307\u5b9a\u7c7b\u540d）\u3002<\/p>\n \u65b9\u5f0f 2：\u901a\u8fc7\u7c7b\u540d.class\u5c5e\u6027<\/h4>\n\/\/ \u76f4\u63a5\u901a\u8fc7\u7c7b\u540d\u83b7\u53d6
\nClass<User> clazz = User.class;
\nSystem.out.println("\u83b7\u53d6\u5230\u7684Class\u5bf9\u8c61：" + clazz);<\/p>\n \u8fd9\u79cd\u65b9\u5f0f\u9700\u8981\u5728\u7f16\u8bd1\u671f\u77e5\u9053\u5177\u4f53\u7c7b，\u7f16\u8bd1\u65f6\u4f1a\u68c0\u67e5\u7c7b\u662f\u5426\u5b58\u5728\u3002<\/p>\n \u65b9\u5f0f 3：\u901a\u8fc7\u5bf9\u8c61.getClass()\u65b9\u6cd5<\/h4>\n<\/p>\nUser user = new User();
\n\/\/ \u901a\u8fc7\u5bf9\u8c61\u5b9e\u4f8b\u83b7\u53d6
\nClass<? extends User> clazz = user.getClass();
\nSystem.out.println("\u83b7\u53d6\u5230\u7684Class\u5bf9\u8c61：" + clazz);<\/p>\n \u8fd9\u79cd\u65b9\u5f0f\u9700\u8981\u5148\u6709\u5bf9\u8c61\u5b9e\u4f8b，\u9002\u5408\u5df2\u6709\u5bf9\u8c61\u7684\u573a\u666f\u3002<\/p>\n \u6ce8\u610f：\u4e00\u4e2a\u7c7b\u5728 JVM \u4e2d\u53ea\u6709\u4e00\u4e2aClass\u5bf9\u8c61，\u65e0\u8bba\u901a\u8fc7\u54ea\u79cd\u65b9\u5f0f\u83b7\u53d6，\u90fd\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61：<\/p>\n Class<?> clazz1 = Class.forName("com.example.User");
\nClass<User> clazz2 = User.class;
\nUser user = new User();
\nClass<? extends User> clazz3 = user.getClass();<\/p>\n System.out.println(clazz1 == clazz2); \/\/ true
\nSystem.out.println(clazz1 == clazz3); \/\/ true<\/p>\n \u901a\u8fc7\u53cd\u5c04\u64cd\u4f5c\u7c7b\u7684\u6784\u9020\u65b9\u6cd5<\/h3>\nConstructor\u7c7b\u7528\u4e8e\u8868\u793a\u548c\u64cd\u4f5c\u7c7b\u7684\u6784\u9020\u65b9\u6cd5，\u901a\u8fc7Class\u5bf9\u8c61\u53ef\u4ee5\u83b7\u53d6\u7c7b\u7684\u6240\u6709\u6784\u9020\u65b9\u6cd5，\u5e76\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/p>\n \u793a\u4f8b：User \u7c7b<\/h4>\n\u9996\u5148\u5b9a\u4e49\u4e00\u4e2a\u7528\u4e8e\u6d4b\u8bd5\u7684User\u7c7b：<\/p>\n package com.example;<\/p>\n public class User {
\n private String username;
\n private int age;
\n private String email;<\/p>\n \/\/ \u65e0\u53c2\u6784\u9020
\n public User() {
\n }<\/p>\n \/\/ \u6709\u53c2\u6784\u90201
\n public User(String username, int age) {
\n this.username = username;
\n this.age = age;
\n }<\/p>\n \/\/ \u6709\u53c2\u6784\u90202（\u79c1\u6709）
\n private User(String username, int age, String email) {
\n this.username = username;
\n this.age = age;
\n this.email = email;
\n }<\/p>\n \/\/ getter\u548csetter\u65b9\u6cd5
\n public String getUsername() {
\n return username;
\n }<\/p>\n public void setUsername(String username) {
\n this.username = username;
\n }<\/p>\n public int getAge() {
\n return age;
\n }<\/p>\n public void setAge(int age) {
\n this.age = age;
\n }<\/p>\n public String getEmail() {
\n return email;
\n }<\/p>\n public void setEmail(String email) {
\n this.email = email;
\n }<\/p>\n @Override
\n public String toString() {
\n return "User{" +
\n "username='" + username + '\\\\'' +
\n ", age=" + age +
\n ", email='" + email + '\\\\'' +
\n '}';
\n }
\n}<\/p>\n \u83b7\u53d6\u6784\u9020\u65b9\u6cd5\u5e76\u521b\u5efa\u5bf9\u8c61<\/h4>\nimport java.lang.reflect.Constructor;
\nimport java.lang.reflect.InvocationTargetException;<\/p>\n public class ConstructorReflectionDemo {
\n public static void main(String[] args) {
\n try {
\n \/\/ \u83b7\u53d6User\u7c7b\u7684Class\u5bf9\u8c61
\n Class<?> clazz = Class.forName("com.example.User");<\/p>\n \/\/ 1. \u83b7\u53d6\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u5e76\u521b\u5efa\u5bf9\u8c61
\n Constructor<?> constructor1 = clazz.getConstructor();
\n User user1 = (User) constructor1.newInstance(); \/\/ \u8c03\u7528\u65e0\u53c2\u6784\u9020
\n user1.setUsername("\u5f20\u4e09");
\n user1.setAge(20);
\n System.out.println("\u65e0\u53c2\u6784\u9020\u521b\u5efa\u7684\u5bf9\u8c61：" + user1);<\/p>\n \/\/ 2. \u83b7\u53d6\u6709\u53c2\u6784\u9020\u65b9\u6cd5\u5e76\u521b\u5efa\u5bf9\u8c61
\n \/\/ \u53c2\u6570：\u6784\u9020\u65b9\u6cd5\u7684\u53c2\u6570\u7c7b\u578b.class
\n Constructor<?> constructor2 = clazz.getConstructor(String.class, int.class);
\n User user2 = (User) constructor2.newInstance("\u674e\u56db", 25); \/\/ \u4f20\u9012\u53c2\u6570
\n System.out.println("\u6709\u53c2\u6784\u9020\u521b\u5efa\u7684\u5bf9\u8c61：" + user2);<\/p>\n \/\/ 3. \u83b7\u53d6\u79c1\u6709\u6784\u9020\u65b9\u6cd5\u5e76\u521b\u5efa\u5bf9\u8c61
\n \/\/ getDeclaredConstructor()\u53ef\u4ee5\u83b7\u53d6\u79c1\u6709\u6784\u9020
\n Constructor<?> constructor3 = clazz.getDeclaredConstructor(String.class, int.class, String.class);
\n constructor3.setAccessible(true); \/\/ \u66b4\u529b\u8bbf\u95ee（\u5ffd\u7565\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26）
\n User user3 = (User) constructor3.newInstance("\u738b\u4e94", 30, "wangwu@example.com");
\n System.out.println("\u79c1\u6709\u6784\u9020\u521b\u5efa\u7684\u5bf9\u8c61：" + user3);<\/p>\n } catch (ClassNotFoundException | NoSuchMethodException | InstantiationException |
\n IllegalAccessException | InvocationTargetException e) {
\n e.printStackTrace();
\n }
\n }
\n}<\/p>\n \u5173\u952e\u65b9\u6cd5\u8bf4\u660e：<\/p>\n \n- getConstructor(Class<?>… parameterTypes)：\u83b7\u53d6 public \u4fee\u9970\u7684\u6784\u9020\u65b9\u6cd5<\/li>\n
- getDeclaredConstructor(Class<?>… parameterTypes)：\u83b7\u53d6\u6240\u6709\u6784\u9020\u65b9\u6cd5（\u5305\u62ec private）<\/li>\n
- newInstance(Object… initargs)：\u8c03\u7528\u6784\u9020\u65b9\u6cd5\u521b\u5efa\u5bf9\u8c61<\/li>\n
- setAccessible(true)：\u5173\u95ed\u8bbf\u95ee\u6743\u9650\u68c0\u67e5，\u7528\u4e8e\u8bbf\u95ee\u79c1\u6709\u6210\u5458<\/li>\n<\/ul>\n
\u901a\u8fc7\u53cd\u5c04\u64cd\u4f5c\u7c7b\u7684\u65b9\u6cd5<\/h3>\nMethod\u7c7b\u7528\u4e8e\u8868\u793a\u548c\u64cd\u4f5c\u7c7b\u7684\u65b9\u6cd5，\u901a\u8fc7\u53cd\u5c04\u53ef\u4ee5\u8c03\u7528\u7c7b\u7684\u4efb\u610f\u65b9\u6cd5（\u5305\u62ec\u79c1\u6709\u65b9\u6cd5）\u3002<\/p>\n import java.lang.reflect.InvocationTargetException;
\nimport java.lang.reflect.Method;<\/p>\n public class MethodReflectionDemo {
\n public static void main(String[] args) {
\n try {
\n \/\/ \u83b7\u53d6Class\u5bf9\u8c61\u548c\u5b9e\u4f8b
\n Class<?> clazz = Class.forName("com.example.User");
\n User user = (User) clazz.getConstructor().newInstance();<\/p>\n \/\/ 1. \u83b7\u53d6\u5e76\u8c03\u7528public\u65b9\u6cd5（setUsername）
\n \/\/ \u53c2\u6570：\u65b9\u6cd5\u540d，\u53c2\u6570\u7c7b\u578b.class
\n Method setUsernameMethod = clazz.getMethod("setUsername", String.class);
\n \/\/ \u8c03\u7528\u65b9\u6cd5：invoke(\u5bf9\u8c61, \u53c2\u6570\u503c)
\n setUsernameMethod.invoke(user, "\u8d75\u516d");<\/p>\n \/\/ \u83b7\u53d6getUsername\u65b9\u6cd5\u5e76\u8c03\u7528
\n Method getUsernameMethod = clazz.getMethod("getUsername");
\n String username = (String) getUsernameMethod.invoke(user);
\n System.out.println("\u7528\u6237\u540d：" + username);<\/p>\n \/\/ 2. \u8c03\u7528\u6709\u591a\u4e2a\u53c2\u6570\u7684\u65b9\u6cd5
\n Method setAgeMethod = clazz.getMethod("setAge", int.class);
\n setAgeMethod.invoke(user, 28);<\/p>\n \/\/ 3. \u8c03\u7528\u79c1\u6709\u65b9\u6cd5（\u5047\u8bbeUser\u7c7b\u6709\u4e00\u4e2a\u79c1\u6709\u65b9\u6cd5）
\n \/\/ \u5148\u5728User\u7c7b\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u79c1\u6709\u65b9\u6cd5：
\n \/\/ private void showInfo() {
\n \/\/ System.out.println("\u7528\u6237\u540d：" + username + ", \u5e74\u9f84：" + age);
\n \/\/ }<\/p>\n Method showInfoMethod = clazz.getDeclaredMethod("showInfo");
\n showInfoMethod.setAccessible(true); \/\/ \u66b4\u529b\u8bbf\u95ee\u79c1\u6709\u65b9\u6cd5
\n showInfoMethod.invoke(user); \/\/ \u8c03\u7528\u79c1\u6709\u65b9\u6cd5<\/p>\n } catch (ClassNotFoundException | NoSuchMethodException | InstantiationException |
\n IllegalAccessException | InvocationTargetException e) {
\n e.printStackTrace();
\n }
\n }
\n}<\/p>\n \u5173\u952e\u65b9\u6cd5\u8bf4\u660e：<\/p>\n \n- getMethod(String name, Class<?>… parameterTypes)：\u83b7\u53d6 public \u4fee\u9970\u7684\u65b9\u6cd5<\/li>\n
- getDeclaredMethod(String name, Class<?>… parameterTypes)：\u83b7\u53d6\u6240\u6709\u65b9\u6cd5（\u5305\u62ec private）<\/li>\n
- invoke(Object obj, Object… args)：\u8c03\u7528\u65b9\u6cd5，\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u5bf9\u8c61\u5b9e\u4f8b（\u9759\u6001\u65b9\u6cd5\u53ef\u4ee5\u4e3a null）<\/li>\n
- setAccessible(true)：\u540c\u6837\u9002\u7528\u4e8e\u65b9\u6cd5，\u7528\u4e8e\u8bbf\u95ee\u79c1\u6709\u65b9\u6cd5<\/li>\n<\/ul>\n
\u901a\u8fc7\u53cd\u5c04\u64cd\u4f5c\u7c7b\u7684\u5c5e\u6027<\/h3>\nField\u7c7b\u7528\u4e8e\u8868\u793a\u548c\u64cd\u4f5c\u7c7b\u7684\u5c5e\u6027，\u901a\u8fc7\u53cd\u5c04\u53ef\u4ee5\u83b7\u53d6\u548c\u4fee\u6539\u7c7b\u7684\u4efb\u610f\u5c5e\u6027（\u5305\u62ec\u79c1\u6709\u5c5e\u6027）\u3002<\/p>\n import java.lang.reflect.Field;<\/p>\n public class FieldReflectionDemo {
\n public static void main(String[] args) {
\n try {
\n \/\/ \u521b\u5efaUser\u5bf9\u8c61
\n User user = new User("\u5b59\u4e03", 35);
\n Class<?> clazz = user.getClass();<\/p>\n \/\/ 1. \u83b7\u53d6\u5e76\u4fee\u6539public\u5c5e\u6027（\u5982\u679c\u6709\u7684\u8bdd）
\n \/\/ \u5047\u8bbeUser\u6709public\u5c5e\u6027：public String address;
\n \/\/ Field addressField = clazz.getField("address");
\n \/\/ addressField.set(user, "\u5317\u4eac\u5e02"); \/\/ \u8bbe\u7f6e\u5c5e\u6027\u503c
\n \/\/ String address = (String) addressField.get(user); \/\/ \u83b7\u53d6\u5c5e\u6027\u503c<\/p>\n \/\/ 2. \u83b7\u53d6\u5e76\u4fee\u6539private\u5c5e\u6027（username）
\n Field usernameField = clazz.getDeclaredField("username");
\n usernameField.setAccessible(true); \/\/ \u66b4\u529b\u8bbf\u95ee\u79c1\u6709\u5c5e\u6027<\/p>\n \/\/ \u83b7\u53d6\u5c5e\u6027\u503c
\n String username = (String) usernameField.get(user);
\n System.out.println("\u4fee\u6539\u524d\u7684\u7528\u6237\u540d：" + username);<\/p>\n \/\/ \u4fee\u6539\u5c5e\u6027\u503c
\n usernameField.set(user, "\u5b59\u4e03_\u4fee\u6539\u540e");
\n System.out.println("\u4fee\u6539\u540e\u7684\u7528\u6237\u540d：" + user.getUsername());<\/p>\n \/\/ 3. \u83b7\u53d6\u5e76\u4fee\u6539private\u5c5e\u6027（age）
\n Field ageField = clazz.getDeclaredField("age");
\n ageField.setAccessible(true);
\n ageField.set(user, 36); \/\/ \u4fee\u6539\u5e74\u9f84
\n System.out.println("\u4fee\u6539\u540e\u7684\u5e74\u9f84：" + user.getAge());<\/p>\n \/\/ 4. \u83b7\u53d6\u9759\u6001\u5c5e\u6027（\u5982\u679c\u6709\u7684\u8bdd）
\n \/\/ \u5047\u8bbeUser\u6709\u9759\u6001\u5c5e\u6027：public static String version;
\n \/\/ Field versionField = clazz.getField("version");
\n \/\/ versionField.set(null, "1.0.0"); \/\/ \u9759\u6001\u5c5e\u6027，\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3anull
\n \/\/ String version = (String) versionField.get(null);<\/p>\n } catch (NoSuchFieldException | IllegalAccessException e) {
\n e.printStackTrace();
\n }
\n }
\n}<\/p>\n \u5173\u952e\u65b9\u6cd5\u8bf4\u660e：<\/p>\n \n- getField(String name)：\u83b7\u53d6 public \u4fee\u9970\u7684\u5c5e\u6027<\/li>\n
- getDeclaredField(String name)：\u83b7\u53d6\u6240\u6709\u5c5e\u6027（\u5305\u62ec private）<\/li>\n
- get(Object obj)：\u83b7\u53d6\u5c5e\u6027\u503c<\/li>\n
- set(Object obj, Object value)：\u8bbe\u7f6e\u5c5e\u6027\u503c（\u9759\u6001\u5c5e\u6027\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a null）<\/li>\n
- setAccessible(true)：\u7528\u4e8e\u8bbf\u95ee\u79c1\u6709\u5c5e\u6027<\/li>\n<\/ul>\n
\u53cd\u5c04\u4e0e\u6ce8\u89e3\u7ed3\u5408<\/h3>\n\u6ce8\u89e3（Annotation）\u662f Java 5 + \u5f15\u5165\u7684\u7279\u6027，\u4e0e\u53cd\u5c04\u7ed3\u5408\u53ef\u4ee5\u5b9e\u73b0\u5f3a\u5927\u7684\u529f\u80fd（\u5982 Spring \u7684@Autowired\u3001MyBatis \u7684@Select）\u3002<\/p>\n \u793a\u4f8b：\u81ea\u5b9a\u4e49\u6ce8\u89e3\u4e0e\u53cd\u5c04\u89e3\u6790<\/h4>\nimport java.lang.annotation.*;
\nimport java.lang.reflect.Field;<\/p>\n \/\/ 1. \u5b9a\u4e49\u81ea\u5b9a\u4e49\u6ce8\u89e3
\n@Target(ElementType.FIELD) \/\/ \u6ce8\u89e3\u4f5c\u7528\u5728\u5c5e\u6027\u4e0a
\n@Retention(RetentionPolicy.RUNTIME) \/\/ \u6ce8\u89e3\u4fdd\u7559\u5230\u8fd0\u884c\u65f6（\u53cd\u5c04\u53ef\u89c1）
\npublic @interface Column {
\n String name(); \/\/ \u6570\u636e\u5e93\u5217\u540d
\n boolean nullable() default true; \/\/ \u662f\u5426\u5141\u8bb8\u4e3anull
\n}<\/p>\n \/\/ 2. \u4f7f\u7528\u6ce8\u89e3\u7684\u5b9e\u4f53\u7c7b
\nclass User {
\n @Column(name = "user_name", nullable = false)
\n private String username;<\/p>\n @Column(name = "user_age")
\n private int age;<\/p>\n private String email; \/\/ \u6ca1\u6709\u6ce8\u89e3<\/p>\n \/\/ \u6784\u9020\u65b9\u6cd5\u3001getter\u3001setter\u7701\u7565
\n public User(String username, int age) {
\n this.username = username;
\n this.age = age;
\n }
\n}<\/p>\n \/\/ 3. \u901a\u8fc7\u53cd\u5c04\u89e3\u6790\u6ce8\u89e3
\npublic class AnnotationReflectionDemo {
\n public static void main(String[] args) {
\n try {
\n Class<?> clazz = User.class;
\n \/\/ \u83b7\u53d6\u6240\u6709\u5c5e\u6027
\n Field[] fields = clazz.getDeclaredFields();<\/p>\n System.out.println("\u89e3\u6790User\u7c7b\u7684\u6ce8\u89e3\u4fe1\u606f：");
\n for (Field field : fields) {
\n \/\/ \u5224\u65ad\u5c5e\u6027\u662f\u5426\u6709@Column\u6ce8\u89e3
\n if (field.isAnnotationPresent(Column.class)) {
\n \/\/ \u83b7\u53d6\u6ce8\u89e3\u5b9e\u4f8b
\n Column column = field.getAnnotation(Column.class);<\/p>\n System.out.println("\u5c5e\u6027\u540d：" + field.getName());
\n System.out.println("\u6570\u636e\u5e93\u5217\u540d：" + column.name());
\n System.out.println("\u662f\u5426\u5141\u8bb8\u4e3anull：" + column.nullable());
\n System.out.println("———————");
\n } else {
\n System.out.println("\u5c5e\u6027\u540d：" + field.getName() + "（\u65e0@Column\u6ce8\u89e3）");
\n System.out.println("———————");
\n }
\n }<\/p>\n } catch (Exception e) {
\n e.printStackTrace();
\n }
\n }
\n}<\/p>\n \u8fd0\u884c\u7ed3\u679c：<\/p>\n \u89e3\u6790User\u7c7b\u7684\u6ce8\u89e3\u4fe1\u606f：
\n\u5c5e\u6027\u540d：username
\n\u6570\u636e\u5e93\u5217\u540d：user_name
\n\u662f\u5426\u5141\u8bb8\u4e3anull：false
\n———————
\n\u5c5e\u6027\u540d：age
\n\u6570\u636e\u5e93\u5217\u540d：user_age
\n\u662f\u5426\u5141\u8bb8\u4e3anull：true
\n———————
\n\u5c5e\u6027\u540d：email（\u65e0@Column\u6ce8\u89e3）
\n———————<\/p>\n \u8fd9\u79cd\u65b9\u5f0f\u662f ORM \u6846\u67b6（\u5982 MyBatis）\u5b9e\u73b0\u5bf9\u8c61\u4e0e\u6570\u636e\u5e93\u8868\u6620\u5c04\u7684\u6838\u5fc3\u539f\u7406：\u901a\u8fc7\u6ce8\u89e3\u6807\u8bb0\u5c5e\u6027\u4e0e\u5217\u7684\u6620\u5c04\u5173\u7cfb，\u518d\u901a\u8fc7\u53cd\u5c04\u89e3\u6790\u6ce8\u89e3\u751f\u6210 SQL \u8bed\u53e5\u3002<\/p>\n \u53cd\u5c04\u7684\u4f18\u7f3a\u70b9<\/h3>\n\u4f18\u70b9<\/h4>\n - \u7075\u6d3b\u6027\u9ad8：\u7a81\u7834\u7f16\u8bd1\u671f\u9650\u5236，\u80fd\u591f\u52a8\u6001\u64cd\u4f5c\u7c7b\u548c\u5bf9\u8c61<\/li>\n
- \u89e3\u8026：\u901a\u8fc7\u914d\u7f6e\u6587\u4ef6（\u5982 XML）\u6307\u5b9a\u7c7b\u540d，\u65e0\u9700\u786c\u7f16\u7801，\u4fbf\u4e8e\u6269\u5c55<\/li>\n
- \u6846\u67b6\u57fa\u7840：\u662f\u4e3b\u6d41\u6846\u67b6（Spring\u3001MyBatis \u7b49）\u7684\u6838\u5fc3\u6280\u672f<\/li>\n
- \u53ef\u6269\u5c55\u6027\u5f3a：\u53ef\u4ee5\u5728\u4e0d\u4fee\u6539\u539f\u6709\u4ee3\u7801\u7684\u60c5\u51b5\u4e0b\u6269\u5c55\u529f\u80fd<\/li>\n
\u7f3a\u70b9<\/h4>\n - \u6027\u80fd\u5f00\u9500：\u53cd\u5c04\u64cd\u4f5c\u9700\u8981\u89e3\u6790\u5b57\u8282\u7801，\u6027\u80fd\u6bd4\u76f4\u63a5\u8c03\u7528\u4f4e（\u7ea6\u6162 10-100 \u500d）<\/li>\n
- \u5b89\u5168\u6027\u95ee\u9898：\u53ef\u4ee5\u8bbf\u95ee\u79c1\u6709\u6210\u5458，\u7834\u574f\u5c01\u88c5\u6027<\/li>\n
- \u4ee3\u7801\u53ef\u8bfb\u6027\u5dee：\u53cd\u5c04\u4ee3\u7801\u8f83\u590d\u6742，\u4e0d\u5982\u76f4\u63a5\u8c03\u7528\u76f4\u89c2<\/li>\n
- \u7f16\u8bd1\u671f\u68c0\u67e5\u7f3a\u5931：\u9519\u8bef\u53ea\u80fd\u5728\u8fd0\u884c\u65f6\u53d1\u73b0<\/li>\n
\u4f18\u5316\u53cd\u5c04\u6027\u80fd\u7684\u65b9\u6cd5：<\/p>\n \n- \u7f13\u5b58Class\u3001Method\u3001Field\u7b49\u5bf9\u8c61，\u907f\u514d\u9891\u7e41\u83b7\u53d6<\/li>\n
- \u5c3d\u91cf\u4f7f\u7528setAccessible(true)\u5173\u95ed\u8bbf\u95ee\u68c0\u67e5（\u53ef\u63d0\u5347\u6027\u80fd）<\/li>\n
- \u975e\u5fc5\u8981\u573a\u666f\u907f\u514d\u4f7f\u7528\u53cd\u5c04<\/li>\n<\/ul>\n
\u53cd\u5c04\u5728 JavaWeb \u4e2d\u7684\u5e94\u7528<\/h3>\n\u53cd\u5c04\u662f JavaWeb \u5f00\u53d1\u7684\u6838\u5fc3\u6280\u672f\u4e4b\u4e00，\u4ee5\u4e0b\u662f\u51e0\u4e2a\u5178\u578b\u5e94\u7528\u573a\u666f：<\/p>\n 1. Servlet \u5bb9\u5668\u521d\u59cb\u5316<\/h4>\nTomcat \u7b49 Servlet \u5bb9\u5668\u901a\u8fc7\u53cd\u5c04\u521d\u59cb\u5316 Servlet：<\/p>\n \/\/ Tomcat\u5185\u90e8\u5de5\u4f5c\u539f\u7406\u7b80\u5316
\npublic class ServletContainer {
\n public void initServlet(String servletClassName) {
\n try {
\n \/\/ 1. \u901a\u8fc7\u7c7b\u540d\u52a0\u8f7dServlet\u7c7b
\n Class<?> servletClass = Class.forName(servletClassName);<\/p>\n \/\/ 2. \u5b9e\u4f8b\u5316Servlet
\n Object servlet = servletClass.getConstructor().newInstance();<\/p>\n \/\/ 3. \u8c03\u7528init\u65b9\u6cd5
\n Method initMethod = servletClass.getMethod("init", ServletConfig.class);
\n initMethod.invoke(servlet, new MyServletConfig());<\/p>\n System.out.println("Servlet\u521d\u59cb\u5316\u5b8c\u6210：" + servletClassName);
\n } catch (Exception e) {
\n e.printStackTrace();
\n }
\n }
\n}<\/p>\n 2. Spring IOC \u5bb9\u5668<\/h4>\nSpring \u7684 IOC（\u63a7\u5236\u53cd\u8f6c）\u5bb9\u5668\u901a\u8fc7\u53cd\u5c04\u521b\u5efa\u548c\u7ba1\u7406 Bean：<\/p>\n <!– Spring\u914d\u7f6e\u6587\u4ef6 –>
\n<bean id="userService" class="com.example.UserService">
\n <property name="userDao" ref="userDao"\/>
\n<\/bean><\/p>\n Spring \u5bb9\u5668\u89e3\u6790\u914d\u7f6e\u6587\u4ef6，\u901a\u8fc7\u53cd\u5c04\u521b\u5efaUserService\u5b9e\u4f8b，\u5e76\u8c03\u7528setUserDao\u65b9\u6cd5\u6ce8\u5165\u4f9d\u8d56\u3002<\/p>\n 3. \u81ea\u5b9a\u4e49 MVC \u6846\u67b6<\/h4>\n\u7b80\u5355 MVC \u6846\u67b6\u901a\u8fc7\u53cd\u5c04\u5904\u7406\u8bf7\u6c42：<\/p>\n \/\/ \u7b80\u5316\u7684\u63a7\u5236\u5668
\n@Controller
\npublic class UserController {
\n @RequestMapping("\/user\/list")
\n public String listUsers() {
\n \/\/ \u5904\u7406\u7528\u6237\u5217\u8868\u8bf7\u6c42
\n return "userList";
\n }
\n}<\/p>\n \/\/ \u6846\u67b6\u901a\u8fc7\u53cd\u5c04\u89e3\u6790@RequestMapping\u6ce8\u89e3
\npublic class DispatcherServlet {
\n public void doGet(HttpServletRequest request, HttpServletResponse response) {
\n String path = request.getRequestURI(); \/\/ \u83b7\u53d6\u8bf7\u6c42\u8def\u5f84<\/p>\n \/\/ \u626b\u63cf\u6240\u6709@Controller\u7c7b
\n for (Class<?> clazz : controllerClasses) {
\n \/\/ \u89e3\u6790@RequestMapping\u6ce8\u89e3，\u627e\u5230\u5339\u914d\u7684\u65b9\u6cd5
\n for (Method method : clazz.getDeclaredMethods()) {
\n if (method.isAnnotationPresent(RequestMapping.class)) {
\n RequestMapping mapping = method.getAnnotation(RequestMapping.class);
\n if (mapping.value().equals(path)) {
\n \/\/ \u53cd\u5c04\u8c03\u7528\u65b9\u6cd5\u5904\u7406\u8bf7\u6c42
\n Object controller = clazz.getConstructor().newInstance();
\n String view = (String) method.invoke(controller);
\n \/\/ \u8f6c\u53d1\u5230\u89c6\u56fe
\n request.getRequestDispatcher(view + ".jsp").forward(request, response);
\n return;
\n }
\n }
\n }
\n }
\n }
\n}<\/p>\n \u603b\u7ed3\u4e0e\u5b9e\u8df5<\/h3>\n\u77e5\u8bc6\u70b9\u56de\u987e<\/h4>\n - \u53cd\u5c04\u673a\u5236：\u7a0b\u5e8f\u8fd0\u884c\u65f6\u83b7\u53d6\u7c7b\u4fe1\u606f\u5e76\u64cd\u4f5c\u7c7b\u6210\u5458\u7684\u80fd\u529b<\/li>\n
- \u6838\u5fc3\u7c7b：Class（\u5165\u53e3）\u3001Constructor（\u6784\u9020\u65b9\u6cd5）\u3001Method（\u65b9\u6cd5）\u3001Field（\u5c5e\u6027）<\/li>\n
- \u83b7\u53d6 Class \u5bf9\u8c61\u7684\u65b9\u5f0f：Class.forName()\u3001\u7c7b\u540d.class\u3001\u5bf9\u8c61.getClass()<\/li>\n
- \u53cd\u5c04\u64cd\u4f5c：\n
|