JSON解析实例——使用Json-lib

JSON解析实例——使用Json-lib

Json-lib下载及使用

　　本文介绍用一个类库进行JSON解析。

　　工具下载地址：http://sourceforge.net/projects/json-lib/?source=directory

　　下载后，有这么三个东东：

package com.shengqishiwind.domain;

public class Person
{
private int id;
private String name;
private String address;

public Person()
{
}

public Person(int id, String name, String address)
{
super();
this.id = id;
this.name = name;
this.address = address;
}

public int getId()
{
return id;
}

public void setId(int id)
{
this.id = id;
}

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;
}

@Override
public String toString()
{
return "Person [id=" + id + ", name=" + name + ", address=" + address
+ "]";
}

}

Person.java

package com.shengqishiwind.tools;

import net.sf.json.JSONObject;

public class JsonTools
{

public JsonTools()
{

}

public static String createJsonString(String key, Object value)
{
String jsonString = null;

JSONObject jsonObject = new JSONObject();
jsonObject.put(key, value);
jsonString = jsonObject.toString();

return jsonString;

}

}

package com.shengqishiwind.service;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.shengqishiwind.domain.Person;

public class JsonService
{
public JsonService()
{
}

public Person getPerson()
{
Person person = new Person(001, "ZhangSan", "Beijing");

return person;

}

public List<Person> getPersonsList()
{
List<Person> personsList = new ArrayList<Person>();
Person person1 = new Person(001, "ZhangSan", "Beijing");
Person person2 = new Person(002, "LiSi", "Tianjin");
Person person3 = new Person(003, "WangWu", "Shanghai");

personsList.add(person1);
personsList.add(person2);
personsList.add(person3);

return personsList;
}

public List<String> getStringsList()
{
List<String> stringsList = new ArrayList<String>();

stringsList.add("南京");
stringsList.add("杭州");
stringsList.add("承德");
stringsList.add("哈尔滨");
stringsList.add("重庆");

return stringsList;
}

public List<Map<String, Object>> getMapsList()
{
List<Map<String, Object>> mapsList = new ArrayList<Map<String, Object>>();

for (int i = 0; i < 3; ++i)
{
Map<String, Object> map = new HashMap<String, Object>();

map.put("id", i);
map.put("name", "Name_" + i);
map.put("address", "Address_" + i);

mapsList.add(map);
}

return mapsList;

}

}

　　最后测试的主程序：

package com.shengqishiwind.jsontest;

import com.shengqishiwind.domain.Person;
import com.shengqishiwind.service.JsonService;
import com.shengqishiwind.tools.JsonTools;

public class Test1
{

public static void main(String[] args)
{
String msg = "";

JsonService service = new JsonService();
Person person = service.getPerson();

// 一个Person对象
msg = JsonTools.createJsonString("aPerson", person);
System.out.println(msg);

// 一个List，里面有若干Person对象
msg = JsonTools.createJsonString("Persons", service.getPersonsList());
System.out.println(msg);

// 一个List，里面有若干String对象
msg = JsonTools.createJsonString("StringsList",
service.getStringsList());
System.out.println(msg);

// 一个List，里面有若干Map对象，每个Map对象中存储了若干个键值对
msg = JsonTools.createJsonString("MapsList", service.getMapsList());
System.out.println(msg);

}

}

　　程序在控制台输出如下：

{"aPerson":{"address":"Beijing","id":1,"name":"ZhangSan"}}
{"Persons":[{"address":"Beijing","id":1,"name":"ZhangSan"},{"address":"Tianjin","id":2,"name":"LiSi"},{"address":"Shanghai","id":3,"name":"WangWu"}]}
{"StringsList":["南京","杭州","承德","哈尔滨","重庆"]}
{"MapsList":[{"id":0,"address":"Address_0","name":"Name_0"},{"id":1,"address":"Address_1","name":"Name_1"},{"id":2,"address":"Address_2","name":"Name_2"}]}

参考资料

　　老罗Android开发视频教程。

　　本博客上一篇博文：JSON数据解析 基础知识及链接收集

　　Json-lib工具类库下载地址：

　　http://sourceforge.net/projects/json-lib/?source=directory

　　http://sourceforge.net/projects/json-lib/files/json-lib/json-lib-2.4/

　　附加包下载地址：

　　http://download.csdn.net/download/guoyongxue/4423006

　　我的百度网盘中全部Json-lib资源下载：

　　http://pan.baidu.com/share/link?shareid=1066468750&uk=2701745266

　　如果觉得有帮助，就点个推荐吧~~~