SOCKET发送HTTP请求，Servlet处理的问题
客户端用socket连接web服务器发送HTTP请求，访问一个Servlet /service .并接收servlet的相应数据
我的客户端可以连接上服务端，但是发送的消息Servlet接收不到，Servlet发送回的消息客户端也接收不到。
客户端：
- Java code
public class Client {
public static void main(String[] arg) {
Socket socket;
try {
socket = new Socket("10.20.64.203", 7001);
OutputStream os = socket.getOutputStream();
InputStream ins = socket.getInputStream();
String data= getXmlString();
StringBuffer sb = new StringBuffer();
sb.append("POST /service HTTP/1.1\r\n");// 注意\r\n为回车换行
sb.append("Accept-Language: zh-cn\r\n");
sb.append("Connection: Keep-Alive\r\n");
sb.append("Host:localhost\r\n");
sb.append("Content-Length:11\r\n");
sb.append("\r\n");
sb.append("data=abc\r\n");
sb.append("\r\n");
// 接收Web服务器返回HTTP响应包
os.write(sb.toString().getBytes());
os.flush();
byte[] b = new byte[1000];
ins.read(b); //读取http头
InputStreamReader ireader = new InputStreamReader(ins);
java.io.BufferedReader reader = new java.io.BufferedReader(ireader);
String s = null；//读取内容
System.out.println( "response:");
while(( s= reader.readLine())!= null){//读取不到内容？
System.out.println(s);
}
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
Servlet
- Java code
public class ProcessServlet extends HttpServlet { private static final long serialVersionUID = 1L; public ProcessServlet() { super(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("receive Request message*******************:"); PrintWriter out = response.getWriter(); response.setContentType("text/html;charset=utf-8"); out.println("<html>"); out.println("<head><title>First servlet</title></head>"); out.println("<body>"); out.println("welcome use selevet"); out.println("</body>"); out.println("</html>"); BufferedReader reader = request.getReader(); String msg = null; while ((msg = reader.readLine()) != null) { System.out.println("receive Request message:" + msg); String send = "HTTP/1.1 200 OK\r\n" + "Filename: " + "\r\n" + "Content_length: " + "\r\n"; out.println(send); out.flush(); } out.flush(); out.close(); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); }}
[解决办法]
socket发送时，不需要指定通信地址么
比如http://192.168.2.213/项目名/servlet名
[解决办法]
Socket socket;
try {
String data = URLEncoder.encode("k", "UTF-8") + "=" +
URLEncoder.encode("abc", "UTF-8");
InetAddress addr = InetAddress.getByName("10.20.64.203");
socket = new Socket(addr,7001);
BufferedWriter wr = new BufferedWriter(new
OutputStreamWriter(socket.getOutputStream(), "UTF8"));
InputStream ins = socket.getInputStream();
StringBuffer sb = new StringBuffer();
sb.append("POST /service HTTP/1.1\r\n");// 注意\r\n为回车换行
sb.append("Accept-Language: zh-cn\r\n");
sb.append("Connection: Keep-Alive\r\n");
sb.append("Host:localhost\r\n");
sb.append("Content-Length:11\r\n");
sb.append("Content-Type: application/x-www-form-urlencoded\r\n");
sb.append("\r\n");
sb.append(data);
// 接收Web服务器返回HTTP响应包
wr.write(sb.toString());
wr.flush();
BufferedReader rd = new BufferedReader(new
InputStreamReader(socket.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
System.out.println(line);
}
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
[解决办法]
玩玩的话，你可以这么做，如果是正式项目的话，用 HTTP 客户端 API 吧，强烈不建议自己用 Socket 实现！
[解决办法]
[解决办法]
是不是 需要用 URLConnection对象啊
[解决办法]
Content-Length:11设置的有问题，应该是参数的长度
[解决办法]
现在没有客户端是不支持 HTTP 的 API，而要用 Socket 来实现的！