处理JSON字符串时，一直出错，写个样例后发现原来是没有弄清楚数据的格式问题。

实现的是 JSONString 转换成java对象 或是 list列表

实例类 News

package lyx.entity;

/**

 * @author lyx

 *

 * 2015-8-10上午10:14:38

 *

 *

 *新闻类

 */

public class News {

	/**

	 * 日期

	 */

	private String date;

	/**

	 * 链接

	 */

	private String link;

	/**

	 * 标题

	 */

	private String title;

	public String getDate() {

		return date;

	}

	public void setDate(String date) {

		this.date = date;

	}

	public String getLink() {

		return link;

	}

	public void setLink(String link) {

		this.link = link;

	}

	public String getTitle() {

		return title;

	}

	public void setTitle(String title) {

		this.title = title;

	}

}

測试类：

package test;

import java.util.ArrayList;

import java.util.List;

import com.pom.lyx.entity.News;

import net.sf.json.JSONArray;

import net.sf.json.JSONObject;

public class Test {

	/**

	 * @param args

	 */

	public static void main(String[] args)

	{

		String str_news="[{'date':'2015-08-10 14:20:34','link':'http://news.baidu.com/n?cmd=2&class=hongguan&page=http://news.xinhuanet.com/finance/2015-08/10/c_128112246.htm&cls=hongguan','title':'发改委：尽快上报碳排放权交易管理条例 ――百度新闻搜索'}," +

				"{'date':'2015-08-10 14:13:22','link':'http://news.xinhuanet.com/finance/2015-08/10/c_128112246.htm','title':'发改委：尽快上报碳排放权交易管理条例-新华网'}," +

				"{'date':'2015-08-10 14:02:08','link':'http://guba.eastmoney.com/news,600271,193716538.html','title':'期待信心修复 14股潜伏现最佳时点'}," +

				"{'date':'2015-08-10 14:00:42','link':'http://www.escn.com.cn/news/show-259795.html','title':'外媒称中国欲将“APEC蓝”变常态'}]";

	//将JSON字符串转换成JSONArray

	JSONArray array_news =new JSONArray();

	array_news = JSONArray.fromObject(str_news);

	//JSONArray -> JSONObject ->News ->List

	List<News> newsList1 =new ArrayList<News>();

	for (int i = 0; i < array_news.size(); i++) {

			//JSONObject对象

			JSONObject jsonObj =(JSONObject) array_news.get(i);

			//依据key获取相应的值

			System.out.println(jsonObj.getString("title"));

			//将JSONObject对象转换成实体类后加入到List列表中

			newsList1.add((News) JSONObject.toBean(jsonObj ,News.class));

			System.out.println(newsList1.get(i).getTitle()+":"+newsList1.get(i).getLink());

		}

	//JSONArray -> List

		@SuppressWarnings("unchecked")

	 	//将JSONArray转换成List列表

		List<News> newsList =(List<News>) JSONArray.toCollection(array_news, News.class);

		for (News news : newsList) {

			System.out.println(news.getDate()+":"+news.getTitle()+":"+news.getLink());

		}

	}

}

上面实现的是 JSONString 转换成java对象 或是 list列表