/*

* System Abbrev ：

* system Name  :

* Component No  ：

* Component Name：

* File name     ：ReflectTestMain.java

* Author        ：Qiuzhenping

* Date          ：2014-10-25

* Description   :  <description>

*/

/* Updation record 1：

* Updation date        :  2014-10-25

* Updator          :  Qiuzhenping

* Trace No:  <Trace No>

* Updation No:  <Updation No>

* Updation Content:  <List all contents of updation and all methods updated.>

*/

package com.qiuzhping.reflect.main;

import java.lang.reflect.Constructor;

import java.lang.reflect.Field;

import java.lang.reflect.Method;

/**

* <Description functions in a word>

* 反射就是把Java类中的各种成分映射成对应的Java类。

* <Detail description>

*

* @author  Qiuzhenping

* @version  [Version NO, 2014-10-25]

* @see  [Related classes/methods]

* @since  [product/module version]

*/

public class ReflectTestMain {

/** <default constructor>

*/

public ReflectTestMain() {

// TODO Auto-generated constructor stub

}

/** <Description functions in a word>

* 2014-10-25

* <Detail description>

* @author  Qiuzhenping

* @param args [Parameters description]

* @return void [Return type description]

* @exception throws [Exception] [Exception description]

* @see [Related classes#Related methods#Related properties]

*/

public static void main(String[] args) throws Exception{

// TODO Auto-generated method stub

//Constructor[] contructor = Person.class.getConstructors();

//Method[] method = Person.class.getMethods();

Person p = new Person(24, "Qiuzhping", "100001", "Qiuzhping");

//               Field [] field = p.getClass().getDeclaredFields();

//               for(Field f:field){

//                         f.setAccessible(true);

//                         System.out.println(f.getName());

//                         Object obj = f.get(p);

//                         System.out.println(obj);

//               }

changeStringValue(p);

System.out.println(p.toString());

}

/** <Description functions in a word>

*  将obj对象中的String类型的字段相应的Value中含有i的字符替换为abc<BR>

*  2014-10-26

* <Detail description>

* @author  Qiuzhenping

* @param obj [Parameters description]

* @return void [Return type description]

* @exception throws [Exception] [Exception description]

* @see [Related classes#Related methods#Related properties]

*/

private static void changeStringValue(Object obj) throws Exception {

Field[] fields = obj.getClass().getDeclaredFields();

for(Field f : fields){

f.setAccessible(true);//暴力反射

if(f.getType() == String.class){//字节码比較是用 ==

String oldValue = (String) f.get(obj);

String newValue = oldValue.replaceAll("i", "abc");//将全部的i替换为abc

f.set(obj, newValue);

}

}

}

static class Person {

public Person(int age, String name, String id, String pwd) {

super();

this.age = age;

this.name = name;

this.id = id;

this.pwd = pwd;

}

@Override

public String toString() {

return "age = "+age +"\tname = "+name+"\tid = "+id+"\tpwd = "+pwd;

}

private int age;

private String name;

private String id;

private String pwd;

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 getId() {

return id;

}

public void setId(String id) {

this.id = id;

}

public String getPwd() {

return pwd;

}

public void setPwd(String pwd) {

this.pwd = pwd;

}

/** <default constructor>

*/

public Person() {

// TODO Auto-generated constructor stub

}

}

}