package com.whbs.bean;  public class UserBean {  private Integer id;  private int age;  private String name;  private String address;  public UserBean(){  System.out.println("实例化");  }  public Integer getId() {  return id;  }  public void setId(Integer id) {  this.id = id;  }  public int getAge() {  return age;  }  public void setAge(int age) {  this.age = age;  }  public String getName() {  return name;  }  public void setName(String name) {  this.name = name;  }  public String getAddress() {  return address;  }  public void setAddress(String address) {  this.address = address;  }  }  2 > 反射测试  package com.whbs.test;  import java.lang.reflect.Field;
import java.lang.reflect.Method;  import com.whbs.bean.UserBean;  public class Test1 {  public static void main(String[] args) throws Exception {  /* * 实列化类 方法1 */  //String classPath = "com.whbs.bean.UserBean";  //Class cla = Test1.class.getClassLoader().loadClass(classPath);  //Object ob = cla.newInstance();  /* * 实列化类 方法2 */  UserBean bean = new UserBean();  bean.setId(100);  bean.setAddress("武汉");  //得到类对象  Class userCla = (Class) bean.getClass();  /* * 得到类中的所有属性集合 */  Field[] fs = userCla.getDeclaredFields();  for(int i = 0 ; i < fs.length; i++){  Field f = fs[i];  f.setAccessible(true); //设置些属性是可以访问的  Object val = f.get(bean);//得到此属性的值
        System.out.println("name:"+f.getName()+"\t value = "+val);  String type = f.getType().toString();//得到此属性的类型  if (type.endsWith("String")) {  System.out.println(f.getType()+"\t是String");  f.set(bean,"12") ;        //给属性设值  }else if(type.endsWith("int") || type.endsWith("Integer")){  System.out.println(f.getType()+"\t是int");  f.set(bean,12) ;       //给属性设值  }else{  System.out.println(f.getType()+"\t");  }  }  /* * 得到类中的方法 */  Method[] methods = userCla.getMethods();  for(int i = 0; i < methods.length; i++){  Method method = methods[i];  if(method.getName().startsWith("get")){  System.out.print("methodName:"+method.getName()+"\t");  System.out.println("value:"+method.invoke(bean));//得到get 方法的值
           }  }  }  }