java处理HTTP请求

 import com.diyfintech.wx.service.HttpService;
 import org.springframework.stereotype.Service;

 import java.io.BufferedReader;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.HttpURLConnection;
 import java.net.URL;
 @Service
 public class HttpServiceImpl implements HttpService {

   //处理http请求  requestUrl为请求地址  requestMethod请求方式，值为"GET"或"POST"
   public String httpRequest(String requestUrl,String requestMethod,String outputStr){

     StringBuffer buffer=null;
     try{
       URL url=new URL(requestUrl);
       HttpURLConnection conn=(HttpURLConnection)url.openConnection();
       conn.setDoOutput(true);
       conn.setDoInput(true);
       conn.setRequestMethod(requestMethod);
       conn.connect();
       //往服务器端写内容 也就是发起http请求需要带的参数
       if(null!=outputStr){
         OutputStream os=conn.getOutputStream();
         os.write(outputStr.getBytes("utf-8"));
         os.close();
       }
       //读取服务器端返回的内容
       InputStream is=conn.getInputStream();
       InputStreamReader isr=new InputStreamReader(is,"utf-8");
       BufferedReader br=new BufferedReader(isr);
       buffer=new StringBuffer();
       String line=null;
       while((line=br.readLine())!=null){
         buffer.append(line);
       }
     }catch(Exception e){
       e.printStackTrace();
     }
     return buffer.toString();
   }

 }