HttpUtils.java

package com.sdutacm.sportacm;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.NameValuePair;import org.apache.http.client.HttpClient;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.util.EntityUtils;import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.PrintWriter;import java.net.HttpURLConnection;import java.net.URL;import java.util.List;/** * Created by bummer on 2017/8/1. */public class HttpUtil {    static HttpURLConnection conn = null;    static InputStreamReader input = null;    static BufferedReader buffer = null;    static PrintWriter print = null;    public static void httpconnect(String url){        try {            URL httpUrl = new URL(url);            conn = (HttpURLConnection) httpUrl.openConnection();        } catch (Exception e) {            e.printStackTrace();        }    }    public static String Get(){        String inputLine = null;        String result = "";        try {           input = new InputStreamReader(conn.getInputStream());            buffer = new BufferedReader(input);            while ((inputLine = buffer.readLine())!=null){                result +=inputLine+"\n";            }            buffer.close();        } catch (Exception e) {            e.printStackTrace();        }        return result;    }    public static String post(String params){        String result = "";        try {            conn.setDoInput(true);            conn.setDoOutput(true);            conn.setRequestMethod("POST");            conn.setUseCaches(false);            OutputStream out = conn.getOutputStream();            print = new PrintWriter(out);            print.print(params);            print.flush();            InputStreamReader input = new InputStreamReader(conn.getInputStream());            BufferedReader reader = new BufferedReader(input);            String inputLine = null;            while ((inputLine = reader.readLine())!=null){                result += inputLine +"\n";            }            print.close();            conn.connect();        } catch (Exception e) {            e.printStackTrace();        }        return result;    }    public void close(){        if(conn != null){            conn.disconnect();        }    }    public static String clientpost(String url, List<NameValuePair> params){        //发送POST请求，创建HttpPost对象        HttpPost httpRequest = new HttpPost(url);        HttpEntity httpEntity;        String result = "";        try {            httpEntity = new UrlEncodedFormEntity( params,"utf-8");            httpRequest.setEntity(httpEntity);            /*HttpClient 是Http的一个借口，因此，HttpClient对象需要通过DefaultHttpClient来进行实例化            * */            HttpClient httpClient = new DefaultHttpClient();            //发送请求，获取响应 该方法将获得Http的响应            HttpResponse httpResponse = httpClient.execute(httpRequest);            //判断请求和相应是否成功            if(httpResponse.getStatusLine().getStatusCode() ==                    HttpStatus.SC_OK){                //调用EntityUtils.toString()方法可获取封装在HttpEntity对象中的服务器的响应内容                result = EntityUtils.toString(httpResponse.getEntity());            }else {                result = "请求错误";            }        } catch (Exception e) {            e.printStackTrace();        }        return  result;    }}