package com.mzsx.http;import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.UnsupportedEncodingException;import java.net.HttpURLConnection;import java.net.URL;import java.net.URLEncoder;public class HttpJsonUilt {    /**     * Get请求     *     * */    public static String readContentFromGet(String GET_URL) throws IOException{        URL getUrl = new URL(GET_URL);        HttpURLConnection connection = (HttpURLConnection) getUrl.openConnection();        connection.connect();        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(),"utf-8"));//设置编码,否则中文乱码        StringBuffer lines=new StringBuffer();        String line=null;        while ((line = reader.readLine()) != null){            lines.append(line);        }        reader.close();        // 断开连接        connection.disconnect();        return lines.toString();    }    /**     * post请求     *     * */    public static String readContentFromPost(String POST_URL, String params) throws IOException{        URL postUrl = new URL(URLEncoder.encode(POST_URL,"utf-8"));        // 打开连接        HttpURLConnection connection = (HttpURLConnection) postUrl.openConnection();        connection.setDoOutput(true);        connection.setDoInput(true);        connection.setRequestMethod("POST");        // Post 请求不能使用缓存        connection.setUseCaches(false);        connection.setInstanceFollowRedirects(true);        connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");        // 连接，从postUrl.openConnection()至此的配置必须要在connect之前完成，        // 要注意的是connection.getOutputStream会隐含的进行connect。        connection.connect();        DataOutputStream out = new DataOutputStream(connection                .getOutputStream());       // String content = "";//"key=j0r53nmbbd78x7m1pqml06u2&type=1&toemail=cngolon@gmail.com" + "&activatecode=" + URLEncoder.encode("中国聚龙", "utf-8");        // DataOutputStream.writeBytes将字符串中的16位的unicode字符以8位的字符形式写道流里面        out.writeBytes(params);        out.flush();        out.close(); // flush and close        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(),"utf-8"));//设置编码,否则中文乱码        String line=null;        StringBuffer lines=new StringBuffer();        while ((line = reader.readLine()) != null){            lines.append(line);        }        reader.close();        // 断开连接        connection.disconnect();        return lines.toString();    }    public static void main(String[] args) throws UnsupportedEncodingException {        //如果参数中有中文可以使用URLEncoder.encode(params,"utf-8")转义        //http://api.map.baidu.com/place/v2/search?                  String GET_URL = "http://api.map.baidu.com/place/v2/search?ak=F454f8a5efe5e577997931cc01de3974&output=json&query="+URLEncoder.encode("银行","utf-8")+"&page_size=10&page_num=0&scope=1&region="+URLEncoder.encode("北京","utf-8");        System.out.println(GET_URL);        try {            System.out.println(readContentFromGet(GET_URL));        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }      }