Java反射得到属性的值和设置属性的值

来源：互联网发布：彩票大数据分析编辑：程序博客网时间：2024/06/05 22:17

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/

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