HttpUtils.java

超、凢脫俗 2022-06-11 06:14 136阅读 0赞

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;
        }
    }

HttpUtils.java

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