/** 

     * 测试返回JSON数据 

     * @param session 

     * @return 

     */  

    @RequestMapping(value="/test")  

    @ResponseBody  

    public Object test(HttpSession session){  

           

        return session.getAttribute("permit");  

    }  

package com.ljn.base;



import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLConnection;



/**

 * @author lijinnan

 * @date:2013-11-11 下午6:12:26  

 */

public class HttpJSONTest {



    /**

     * @param args

     */

    public static void main(String[] args) {

        String url = "http://api.geonames.org/citiesJSON?north=44.1&south=-9.9&east=-22.4&west=55.2&lang=de&username=demo";

        String json = loadJSON(url);

        System.out.println(json);

    }



    public static String loadJSON (String url) {

        StringBuilder json = new StringBuilder();

        try {

            URL oracle = new URL(url);

            URLConnection yc = oracle.openConnection();

            BufferedReader in = new BufferedReader(new InputStreamReader(

                                        yc.getInputStream()));

            String inputLine = null;

            while ( (inputLine = in.readLine()) != null) {

   &