java实现向服务端发送GET和POST请求，javaget,package com.

java实现向服务端发送GET和POST请求，javaget,package com.

package com.hongyuan.test;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.HttpURLConnection;import java.net.URL;public class HttpClient {    //发送一个GET请求    public static String get(String path) throws Exception{        HttpURLConnection httpConn=null;        BufferedReader in=null;        try {            URL url=new URL(path);            httpConn=(HttpURLConnection)url.openConnection();            //读取响应            if(httpConn.getResponseCode()==HttpURLConnection.HTTP_OK){                StringBuffer content=new StringBuffer();                String tempStr="";                in=new BufferedReader(new InputStreamReader(httpConn.getInputStream()));                while((tempStr=in.readLine())!=null){                    content.append(tempStr);                }                return content.toString();            }else{                throw new Exception("请求出现了问题!");            }        } catch (IOException e) {            e.printStackTrace();        }finally{            in.close();            httpConn.disconnect();        }        return null;    }    //发送一个GET请求,参数形式key1=value1&key2=value2...    public static String post(String path,String params) throws Exception{        HttpURLConnection httpConn=null;        BufferedReader in=null;        PrintWriter out=null;        try {            URL url=new URL(path);            httpConn=(HttpURLConnection)url.openConnection();            httpConn.setRequestMethod("POST");            httpConn.setDoInput(true);            httpConn.setDoOutput(true);            //发送post请求参数            out=new PrintWriter(httpConn.getOutputStream());            out.println(params);            out.flush();            //读取响应            if(httpConn.getResponseCode()==HttpURLConnection.HTTP_OK){                StringBuffer content=new StringBuffer();                String tempStr="";                in=new BufferedReader(new InputStreamReader(httpConn.getInputStream()));                while((tempStr=in.readLine())!=null){                    content.append(tempStr);                }                return content.toString();            }else{                throw new Exception("请求出现了问题!");            }        } catch (IOException e) {            e.printStackTrace();        }finally{            in.close();            out.close();            httpConn.disconnect();        }        return null;    }    public static void main(String[] args) throws Exception {        //String resMessage=HttpClient.get("http://localhost:3000/hello?hello=hello get");        String resMessage=HttpClient.post("http://localhost:3000/hello", "hello=hello post");        System.out.println(resMessage);    }}