【第18篇】通过fastjson的JSON对象类处理json数组数据

[{
    "info": {
        "users": {
            "username": "东升布艺","email": "jilongliang@sina.com","tel": "222221111","age": "25"
        },"address": {
            "street": "云城区闻莺路东升布艺","province": "广东省","district": "云城区","city": "云浮市"
        }
    }
}]

package ivyy.taobao.com.domain.fastjson;

import java.util.Iterator;

import ivyy.taobao.com.utils.IoUtils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

/**
 *@DEMO:json
 *@Java：JSONTest3.java
 *@Date:2015-1-19上午9:44:14
 *@Author:liangjilong
 *@Email:jilongliang@sina.com
 *@Weibo:http://weibo.com/jilongliang
 *@Version:1.0
 *@Description：通过fastjson的JSON对象类处理json数组数据
 */
public class JSONTest3 {

	public static void main(String[] args) {
		//1、处理文件路径
		String filePath=JSONTest3.class.getClassLoader().getResource("doc/json1.json").getPath();
		//2、读取文件里面的数据
		String content=IoUtils.reader(filePath);
		//3、把数据转换成json数组
		JSONArray jarr=JSON.parseArray(content);
		
		//-----------------------------方法一-----------------------------
		//遍历json数组节点
		for (Iterator iterator = jarr.iterator(); iterator.hasNext();) {
			JSONObject object = (JSONObject) iterator.next();
			//拿出info节点
			JSONObject infoObj=JSON.parSEObject(object.get("info").toString());
			//拿出address节点
			JSONObject addrObj=JSON.parSEObject(infoObj.get("address").toString());
			System.out.println(addrObj.get("province"));//拿出province节点
			System.out.println(addrObj.get("city"));//拿出city节点
			System.out.println(addrObj.get("district"));//拿出district节点
			System.out.println(addrObj.get("street"));//拿出street节点
			System.out.println(addrObj.getString("street"));//拿出street节点
		}
		
		//-----------------------------方法二-----------------------------
		//遍历json数组节点
		for (int i=0;i<jarr.size();i++) {
			JSONObject object = (JSONObject) jarr.get(i);
			//拿出info节点
			JSONObject infoObj=JSON.parSEObject(object.get("info").toString());
			//拿出address节点
			JSONObject addrObj=JSON.parSEObject(infoObj.get("address").toString());
			System.out.println(addrObj.get("province"));//拿出province节点
			System.out.println(addrObj.get("city"));//拿出city节点
			System.out.println(addrObj.get("district"));//拿出district节点
			System.out.println(addrObj.get("street"));//拿出street节点
			System.out.println(addrObj.getString("street"));//拿出street节点
		}
		//-----------------------------方法三-----------------------------
		//-----------------------------还可以使用do while  while..-----------------------------
		//参考文章http://blog.csdn.net/jilongliang/article/details/42841811 的getArrayToJsonByMap方法
		//遍历json数组节点
		 for (Object object : jarr) {
			 JSONObject obj=JSON.parSEObject( object.toString());
			 
			 JSONObject infoObj=JSON.parSEObject(obj.get("info").toString());
			 //拿出address节点
			 JSONObject addrObj=JSON.parSEObject(infoObj.get("address").toString());
			 System.out.println(addrObj.get("province"));//拿出province节点
			 System.out.println(addrObj.get("city"));//拿出city节点
			 System.out.println(addrObj.get("district"));//拿出district节点
			 System.out.println(addrObj.get("street"));//拿出street节点
			 System.out.println(addrObj.getString("street"));//拿出street节点
		}
		
	}

}

（编辑：李大同）

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