socket 发送http请求

一、发送Get请求

import java.net.*;
import java.io.*;
public class URLSender {  
  /**     * @param args */
 public static void main(String[] args) throws IOException {
        try { 
           Socket socket = new Socket("www.nwu.edu.cn", 80); 
           boolean autoflush = true;
           PrintWriter out = new PrintWriter(socket.getOutputStream(), autoflush); 
           BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            //send an HTTP request to the web server
           out.println("GET / HTTP/1.1"); 
           out.println("Host: nwu.edu.cn"); 
           out.println("Connection: Close"); 
           out.println(); 
           //read the response        
           boolean loop = true;
           StringBuffer sb = new StringBuffer(8096); 
           while (loop) { 
              if (in.ready()) {
                int i = 0;
                while (i != -1) {
                    i = in.read();
                    sb.append((char) i);
                }
                loop = false; 
            } 
           //Thread.currentThread().sleep(50);  
          }  
          //display the response to the out console  
          System.out.println(sb.toString());
          socket.close();
       } catch (UnknownHostException e) {
            System.err.println("Don't know about host: Victest."); 
            System.exit(1); 
       } catch (IOException e) { 
           System.err.println("Couldn't get I/O for " + "the connection to: Victest.");  
           System.exit(1); 
       } 
  }
}

2、用Socket发送一个POST请求

try {
// Construct data
String data = URLEncoder.encode("key1", "UTF-8") + "=" + URLEncoder.encode("value1", "UTF-8");
data += "&" + URLEncoder.encode("key2", "UTF-8") + "=" + URLEncoder.encode("value2", "UTF-8");

// Create a socket to the host
String hostname = "hostname.com";
int port = 80;
InetAddress addr = InetAddress.getByName(hostname);
Socket socket = new Socket(addr, port);

// Send header
String path = "/servlet/SomeServlet";
BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8"));
wr.write("POST "+path+" HTTP/1.0\r\n");
wr.write("Content-Length: "+data.length()+"\r\n");
wr.write("Content-Type: application/x-www-form-urlencoded\r\n");
wr.write("\r\n");

// Send data
wr.write(data);
wr.flush();

// Get response
BufferedReader rd = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
// Process line...
}
wr.close();
rd.close();
} catch (Exception e) {
}