Java中JSON应用

集合转JSON

package com;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONArray;

/**
 * Servlet implementation class JsonServlet
 */
public class JsonServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	private Biz biz = new Biz();

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		try{
			PrintWriter out = response.getWriter();
			String name = request.getParameter("name");
			//得到 数据集
			List<Demo> list = biz.getDemoes(name);	
			//把数据集转成JSON格式
			JSONArray js = JSONArray.fromObject(list);
			//输入json对象
			out.print(js);
			out.flush();
			out.close();
		}catch(Exception e){
			e.printStackTrace();
		}
	}
}

前台得到JSON数据转成对象

$.get("/Demo.do",null,function(data){
	var obj = eval("("+data+")");
	alert(obj.name);
});