Http通讯Util

HttpUtil类
Http通讯Util，可以通过请求参数为jsonstring来通讯，也可以把请求参数放在request中进行通讯
HttpUtil类

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLConnection;

public class HttpUtil {

    /**

     * 向指定URL发送GET方法的请求，参数都放在HttpRequestServlet request的内容中

     * @param url 发送请求的URL

     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。

     * @return URL 所代表远程资源的响应结果

     */

    public static String sendGet(String url, String param) {

        String result = "";

        BufferedReader in = null;

        try {

            String urlNameString = url + "?" + param;

            URL realUrl = new URL(urlNameString);

            // 打开和URL之间的连接

            URLConnection connection = realUrl.openConnection();

            // 设置通用的请求属性

            connection.setRequestProperty("accept", "*/*");

            connection.setRequestProperty("connection", "Keep-Alive");

            connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");

            // 建立实际的连接

            connection.connect();

            // 定义 BufferedReader输入流来读取URL的响应

            in = new BufferedReader(new InputStreamReader(

                    connection.getInputStream()));

            String line;

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

                result += line;

            }

        } catch (Exception e) {

            System.out.println("【HTTP发送GET请求出现异常】:访问URL："+url+",错误："+e.getMessage());

        }

        // 使用finally块来关闭输入流

        finally {

            try {

                if (in != null) {

                    in.close();

                }

            } catch (Exception e2) {

                System.out.println("【HTTP请求关闭输入流异常】:访问URL："+url+",错误："+e2.getMessage());

            }

        }

        return result;

    }

    /**

     * 通过一个jsonString参数来传递数据，POST请求

     * 请求地址的接口的参数必须为String data

     * @param json

     * @param urls

     * @return

     */

    public static  String jsonPost(String urls,String json) {

        OutputStream out = null;

        BufferedReader inputStreamReader = null;

        StringBuffer buffer=null;

        try {

            URL url = new URL(urls);

            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            connection.setDoOutput(true);

            connection.setDoInput(true);

            connection.setUseCaches(false);

            connection.setConnectTimeout(20000);

            connection.setReadTimeout(20000);

            connection.setInstanceFollowRedirects(true);

            connection.setRequestMethod("POST"); // 设置请求方式

            connection.setRequestProperty("Accept-Charset", "utf-8"); // 设置接收数据的格式

            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); // 设置发送数据的格式

            connection.connect();

            out = connection.getOutputStream();

            String pushData = "data="+json;

            out.write(pushData.getBytes("UTF-8"));

            out.flush();

            out.close();

            //获取响应

            inputStreamReader = new BufferedReader(new InputStreamReader(connection.getInputStream(),"UTF-8"));

            // 读取响应

            buffer = new StringBuffer();

            String data= new String("");

            while ((data = inputStreamReader.readLine()) != null) {

                buffer.append(data);

            }

            while ((data = inputStreamReader.readLine()) != null) {

                buffer.append(data);

            }

        }catch (Exception e) {

            e.printStackTrace();

        }finally{

            try {

                if(inputStreamReader != null){

                    inputStreamReader.close();

                }

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

        return buffer.toString();

    }

}
巴特西

Http通讯Util

HttpUtil类

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