http://haoningabc.iteye.com/blog/2011985
代码的git地址
https://github.com/killinux/mysocket/tree/master/websocket/project/tomcat7servlet
如果是使用tomcat7的模式
1.html是客户端
2.tomcat7的servlet对websocket协议进行了封装，里面转发给普通的socket服务端
3.普通的socket 作为服务端
html ----->tomcat7,servlet----->socket server
这里纯js的客户端：
Insert title here
如果是用java-websocket，
git为 https://github.com/killinux/Java-WebSocket
代码如下：
socket server端：
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Server {
public static final int PORT = 5000;
public static void main(String[] args) {
System.out.println("服务器...\n");
Server ser = new Server();
ser.sock();
}
public void sock() {
try {
ServerSocket server = new ServerSocket(PORT);
while (true) {
// 一旦有堵塞, 则表示服务器与客户端获得了连接
Socket client = server.accept();
// 处理这次连接
new PServer(client);
}
} catch (Exception e) {
System.out.println("服务器异常: " + e.getMessage());
}
}
private class PServer implements Runnable {
private Socket socket;
public PServer(Socket sock) {
socket = sock;
new Thread(this).start();
}
public void run() {
System.out.println("一个客户端连接ip:" + socket.getInetAddress());
try {
// 读取客户端数据
DataInputStream input = new DataInputStream(
socket.getInputStream());
// 向客户端发送数据
DataOutputStream out = new DataOutputStream(
socket.getOutputStream());
// 读取客户端数据
//System.out.println("客户端发过来的内容: " + input.readUTF());
byte[] bt = new byte[1024];
int leng = input.read(bt);
System.out.println(new String(bt, 0, leng));
// 发送键盘输入的一行
// String s = new BufferedReader(new
// InputStreamReader(System.in)).readLine();
String s = "server d shu ru";
out.write(s.getBytes());
out.flush();
input.close();
out.close();
socket.close();
} catch (Exception e) {
System.out.println("服务器 run 异常: " + e.getMessage());
}
}
}
}
----------------------------------------------------------------------
----------------------------------------------------------------------
如果server是用tomcat转发
参考
http://blog.csdn.net/a79412906/article/details/9393515
servlet:
package com.hao;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import javax.servlet.http.HttpServletRequest;
import org.apache.catalina.websocket.MessageInbound;
import org.apache.catalina.websocket.StreamInbound;
import org.apache.catalina.websocket.WebSocketServlet;
public class HelloWorldWebSocketServlet extends WebSocketServlet {
protected StreamInbound createWebSocketInbound(String subProtocol,HttpServletRequest arg1) {
return new MessageInbound() {
@Override
protected void onBinaryMessage(ByteBuffer arg0) throws IOException {
// TODO Auto-generated method stub
}
@Override
protected void onTextMessage(CharBuffer message) throws IOException {
// TODO Auto-generated method stub
System.out.println("onText--->" + message.toString());
Socket socket;
String msg = "";
try {
// 向服务器利用Socket发送信息
socket = new Socket("192.168.1.102", 5000);
//socket = new Socket("127.0.0.1",5000);
PrintWriter output = new PrintWriter(
socket.getOutputStream());
output.write(message.toString());
output.flush();
// 这里是接收到Server的信息
DataInputStream input = new DataInputStream(
socket.getInputStream());
byte[] b = new byte[1024];
input.read(b);
// Server返回的信息
msg = new String(b).trim();
output.close();
input.close();
socket.close();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// 往浏览器发送信息
CharBuffer cb = CharBuffer.wrap(new StringBuilder(msg));
getWsOutbound().writeTextMessage(cb);
}
};
}
public static void main(String[] args) {
Socket socket;
String message ="haoning";
String msg = "";
try {
// 向服务器利用Socket发送信息
socket = new Socket("192.168.0.102", 5000);
// socket = new Socket("127.0.0.1",5000);
PrintWriter output = new PrintWriter(
socket.getOutputStream());
output.write(message.toString());
output.flush();
// 这里是接收到Server的信息
DataInputStream input = new DataInputStream(
socket.getInputStream());
byte[] b = new byte[1024];
input.read(b);
// Server返回的信息
msg = new String(b).trim();
output.close();
input.close();
socket.close();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
web.xml配置：
wsSnake com.hao.HelloWorldWebSocketServlet wsSnake /websocket/test
tomcat7的
配置
中心server代码：
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Server {
public static final int PORT = 5000;
public static void main(String[] args) {
System.out.println("服务器...\n");
Server ser = new Server();
ser.sock();
}
public void sock() {
try {
ServerSocket server = new ServerSocket(PORT);
while (true) {
// 一旦有堵塞, 则表示服务器与客户端获得了连接
Socket client = server.accept();
System.out.println("server accept");
// 处理这次连接
new PServer(client);
}
} catch (Exception e) {
System.out.println("服务器异常: " + e.getMessage());
}
}
private class PServer implements Runnable {
private Socket socket;
public PServer(Socket sock) {
socket = sock;
new Thread(this).start();
}
public void run() {
System.out.println("一个客户端连接ip:" + socket.getInetAddress());
try {
// 读取客户端数据
DataInputStream input = new DataInputStream(
socket.getInputStream());
// 向客户端发送数据
DataOutputStream out = new DataOutputStream(
socket.getOutputStream());
// 读取客户端数据
//System.out.println("客户端发过来的内容: " + input.readUTF());
byte[] bt = new byte[1024];
int leng = input.read(bt);
System.out.println(new String(bt, 0, leng));
// 发送键盘输入的一行
// String s = new BufferedReader(new
// InputStreamReader(System.in)).readLine();
String s = "server d shu ru";
out.write(s.getBytes());
out.flush();
input.close();
out.close();
socket.close();
} catch (Exception e) {
System.out.println("服务器 run 异常: " + e.getMessage());
}
}
}
}
客户端改进如下：
Insert title here
servlet中发现，不能广播，只能单纯的返回，如果想每个浏览器都受到消息，则修改如下
package com.hao;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.util.ArrayList;
import javax.servlet.http.HttpServletRequest;
import org.apache.catalina.websocket.MessageInbound;
import org.apache.catalina.websocket.StreamInbound;
import org.apache.catalina.websocket.WebSocketServlet;
import org.apache.catalina.websocket.WsOutbound;
public class HelloWorldWebSocketServlet extends WebSocketServlet {
private static ArrayList mmiList = new ArrayList();
protected StreamInbound createWebSocketInbound(String subProtocol,
HttpServletRequest arg1) {
return new MyMessageInbound();
}
private class MyMessageInbound extends MessageInbound {
WsOutbound myoutbound;
@Override
public void onOpen(WsOutbound outbound) {
try {
System.out.println("Open Client.");
this.myoutbound = outbound;
mmiList .add(this);
outbound.writeTextMessage(CharBuffer.wrap("Hello!"));
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onClose(int status) {
System.out.println("Close Client.");
mmiList .remove(this);
}
@Override
protected void onBinaryMessage(ByteBuffer arg0) throws IOException {
// TODO Auto-generated method stub
}
@Override
protected void onTextMessage(CharBuffer message) throws IOException {
// TODO Auto-generated method stub
System.out.println("onText--->" + message.toString());
for (int i=0;i< mmiList.size();i++ ) {
MyMessageInbound mmib = (MyMessageInbound) mmiList.get(i);
CharBuffer buffer = CharBuffer.wrap(message);
mmib.myoutbound.writeTextMessage(buffer);
mmib.myoutbound.flush();
}
/*Socket socket;
String msg = "";
try {
// 向服务器利用Socket发送信息
socket = new Socket("192.168.0.102", 5000);
// socket = new Socket("127.0.0.1",5000);
PrintWriter output = new PrintWriter(socket.getOutputStream());
output.write(message.toString());
output.flush();
// 这里是接收到Server的信息
DataInputStream input = new DataInputStream(
socket.getInputStream());
byte[] b = new byte[1024];
input.read(b);
// Server返回的信息
msg = new String(b).trim();
output.close();
input.close();
socket.close();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// 往浏览器发送信息
CharBuffer cb = CharBuffer.wrap(new StringBuilder(msg));
getWsOutbound().writeTextMessage(cb);*/
}
}
public static void main(String[] args) {
Socket socket;
String message = "haoning";
String msg = "";
try {
// 向服务器利用Socket发送信息
socket = new Socket("192.168.0.102", 5000);
// socket = new Socket("127.0.0.1",5000);
PrintWriter output = new PrintWriter(socket.getOutputStream());
output.write(message.toString());
output.flush();
// 这里是接收到Server的信息
DataInputStream input = new DataInputStream(socket.getInputStream());
byte[] b = new byte[1024];
input.read(b);
// Server返回的信息
msg = new String(b).trim();
output.close();
input.close();
socket.close();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
这段参考
http://blog.fens.me/java-websocket-intro/