pom.xml (虽然配置了maven tomcat7插件,但是直接从maven中启动web服务，websocket服务启动不了。要将web服务部署到tomcat7 server上。可以直接打包war，也可以在开发工具中引入tomcat7)
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>web</groupId> <artifactId>web</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>web Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>javax.websocket</groupId> <artifactId>javax.websocket-api</artifactId> <version>1.1</version> <scope>provided</scope> </dependency> </dependencies> <build> <finalName>web</finalName> <plugins> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.1</version> <configuration> <port>8077</port> <path>/web</path> <uriEncoding>UTF-8</uriEncoding> <finalName>web</finalName> <server>tomcat7</server> </configuration> </plugin> </plugins> </build> </project>
websocket.server.SimpleServer
package websocket.server;
import javax.websocket.*;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.logging.Logger;
/**
* Created by Administrator on 2016/4/17.
*/
@ServerEndpoint("/SimpleWebSocket")
public class SimpleServer {
private Logger logger = Logger.getLogger(this.getClass().getName());
@OnOpen
public void onOpen(Session session){
logger.info("websocket open ... ");
System.out.println(session);
}
/**
* 连接关闭调用的方法
*/
@OnClose
public void onClose(){
logger.info("websocket close .... ");
}
@OnError
public void onError(Throwable e){
logger.severe("error～～～～"+e.getMessage());
}
/**
* 收到客户端消息后调用的方法
* @param message 客户端发送过来的消息
* @param session 可选的参数
*/
@OnMessage
public void onMessage(String message, Session session) throws IOException {
logger.info("receive the message from client ["+message+"]");
session.getBasicRemote().sendText("服务器收到客户端的信息:"+message);
}
}simple.html
<!DOCTYPE html>
<html>
<head>
<title>Testing websockets</title>
</head>
<body>
<input type="text" id="input"/>
<input type="button" id="button" value="send"/>
<script type="text/javascript">
var webSocket = new WebSocket(‘ws://localhost:8077/web/SimpleWebSocket‘);
webSocket.onerror = function(event) {
console.log("error ... ");
console.log(event.data);
};
webSocket.onopen = function(event) {
console.log("open ... ");
console.log(event.data)
};
webSocket.onmessage = function(event) {
console.log("[message]:"+event.data);
};
var btn = document.getElementById("button");
var input = document.getElementById("input");
btn.onclick = function(){
var value = input.value;
webSocket.send(value);
input.value="";
};
</script>
</body>
</html>原文：http://antlove.blog.51cto.com/10057557/1764843