Java使用原始的HTTPURLConnect发送post请求

快来打我* 2022-05-15 14:19 315阅读 0赞

主要介绍jdk中的httpURLConnect发送post请求：

package dbzhang.test;
    
    import java.beans.Encoder;
    import java.io.BufferedReader;
    import java.io.DataOutputStream;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.UnsupportedEncodingException;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.net.URLEncoder;
    
    /**
    *@author：zdb
    *@time：2018年10月29日
    *@Description: 使用jdk中的HttpURLConnection发送post请求
    *
    */
    public class SendPostDemo {
    	private static String urlPath = "http://localhost:8080/Test1/HelloWorld";
    	
    	public static void main(String[] args) throws IOException {
    		
    		String param = "name="+URLEncoder.encode("张代兵", "UTF-8");
    		
    		 //建立连接
            URL url=new URL(urlPath);
            HttpURLConnection httpConn=(HttpURLConnection)url.openConnection();
             
            //设置参数
            httpConn.setDoOutput(true);     //需要输出
            httpConn.setDoInput(true);      //需要输入
            httpConn.setUseCaches(false);   //不允许缓存
            httpConn.setRequestMethod("POST");      //设置POST方式连接
             
            //设置请求属性
            httpConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            httpConn.setRequestProperty("Connection", "Keep-Alive");// 维持长连接
            httpConn.setRequestProperty("Charset", "UTF-8");
             
            //连接,也可以不用明文connect，使用下面的httpConn.getOutputStream()会自动connect
            httpConn.connect();
                 
            //建立输入流，向指向的URL传入参数
            DataOutputStream dos=new DataOutputStream(httpConn.getOutputStream());
            dos.writeBytes(param);
            dos.flush();
            dos.close();
             
            //获得响应状态
            int resultCode=httpConn.getResponseCode();
            if(HttpURLConnection.HTTP_OK==resultCode){
                StringBuffer sb=new StringBuffer();
                String readLine=new String();
                BufferedReader responseReader=new BufferedReader(new InputStreamReader(httpConn.getInputStream(),"UTF-8"));
                while((readLine=responseReader.readLine())!=null){
                    sb.append(readLine).append("\n");
                }
                responseReader.close();
                System.out.println(sb.toString());
            }  
    		
    	}
    }