Java反射得到属性的值和设置属性的值

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

}

}

}

}

转载于：http://zhangcb666.blog.163.com/blog/static/4696352920107255914820/