java解析json方法总结

package com.test;

 

public class TestPerson {

  private int age;

  private String name;

   

  public TestPerson(){

     

  }

   

  public TestPerson(int age,String name){

    this.age=age;

    this.name=name;

  }

   

  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;

  }

}

 

 

 

package com.test;

import java.util.*;

 

import com.alibaba.fastjson.*;

 

public final class TestFastJson {

 

  public static void main(String[] args) {

    // TODO Auto-generated method stub

     

    TestPerson json = new TestPerson(19,"李明");

    List<TestPerson> list = new ArrayList<TestPerson>();

    list.add(json);

    list.add(new TestPerson(12,"张三"));

    //将集合或者对象序例化成JSON

    System.out.println(JSON.toJSON(json));

    System.out.println( JSON.toJSON(list) );

    //Json串反序列化成对象

    TestPerson person = JSON.parseObject("{\"name\":\"李明\",\"age\":19}", TestPerson.class);

    System.out.printf("name:%s,age:%d\n",person.getName(),person.getAge());

     

    String str = "[{\"name\":\"李明\",\"age\":19},{\"name\":\"张三\",\"age\":12}]";

    //数组对象反序列化成集合

    List<TestPerson> listPerson = JSON.parseArray(str,TestPerson.class);

     

    for(TestPerson item : listPerson){

      System.out.println( item.getName() );

      System.out.println( item.getAge());

    }

     

    //没有对象直接解析JSON对象

    JSONObject jobj = JSON.parseObject("{\"name\":\"李明\",\"age\":19}");

    System.out.printf("name:%s,age:%d\n",jobj.getString("name"),jobj.getBigInteger("age"));

     

    //没有对象直接解析JSON数组

    JSONArray jarr = JSON.parseArray("[{\"name\":\"李明\",\"age\":19},{\"name\":\"张三\",\"age\":12}]");

     

    for(int i=0,len=jarr.size();i<len;i++){

      JSONObject temp= jarr.getJSONObject(i);

      System.out.printf("name:%s,age:%d\n",temp.getString("name"),temp.getBigInteger("age"));

    }

     

    for(Object obj:jarr){

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

    }

     

  }

 

}