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HWZen · Apr 19, 2022 · 558f0ce · 558f0ce
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diff --git a/.gitignore b/.gitignore
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+.idea
+lib
+out
+target
diff --git a/EChat.iml b/EChat.iml
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+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="FacetManager">
+    <facet type="web" name="Web">
+      <configuration>
+        <descriptors>
+          <deploymentDescriptor name="web.xml" url="file://$MODULE_DIR$/web/WEB-INF/web.xml" />
+        </descriptors>
+        <webroots>
+          <root url="file://$MODULE_DIR$/web" relative="/" />
+        </webroots>
+        <sourceRoots>
+          <root url="file://$MODULE_DIR$/src/main/java" />
+          <root url="file://$MODULE_DIR$/src/main/resources" />
+        </sourceRoots>
+      </configuration>
+    </facet>
+  </component>
+</module>
diff --git a/pom.xml b/pom.xml
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+<?xml version="1.0" encoding="UTF-8"?>
+<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/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <dependencies>
+        <dependency>
+            <groupId>javax.websocket</groupId>
+            <artifactId>javax.websocket-api</artifactId>
+            <version>1.1</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>servlet-api</artifactId>
+            <version>3.0-alpha-1</version>
+        </dependency>
+    </dependencies>
+
+    <groupId>org.example</groupId>
+    <artifactId>EChat</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>8</maven.compiler.source>
+        <maven.compiler.target>8</maven.compiler.target>
+    </properties>
+
+</project>
diff --git a/src/main/java/serverTest.java b/src/main/java/serverTest.java
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+import java.io.IOException;
+import javax.websocket.OnClose;
+import javax.websocket.OnError;
+import javax.websocket.OnMessage;
+import javax.websocket.OnOpen;
+import javax.websocket.Session;
+import javax.websocket.server.PathParam;
+import javax.websocket.server.ServerEndpoint;
+
+@ServerEndpoint(value="/websocketTest/{userId}")
+public class serverTest {
+    private static String userId;
+
+    // new Connection
+    @OnOpen
+    public void onOpen(Session session, @PathParam("userId") String userId) {
+        this.userId = userId;
+        System.out.println("Connected to user " + userId);
+    }
+
+    // close Connection
+    @OnClose
+    public void onClose(Session session) {
+        System.out.println("Disconnected from user " + userId);
+    }
+
+    // receive message
+    @OnMessage
+    public void onMessage(String message, Session session) {
+        System.out.println("Received message: " + message);
+    }
+
+    // error
+    @OnError
+    public void onError(Session session, Throwable error) {
+        System.out.println("User: " + userId);
+        System.out.println("Error: " + error.getMessage());
+    }
+
+}
diff --git a/web/WEB-INF/web.xml b/web/WEB-INF/web.xml
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+<?xml version="1.0" encoding="UTF-8"?>
+<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
+         version="4.0">
+
+    <welcome-file-list>
+        <welcome-file>index.jsp</welcome-file>
+    </welcome-file-list>
+</web-app>
+
diff --git a/web/index.jsp b/web/index.jsp
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+<%--
+  Created by IntelliJ IDEA.
+  User: HWZ
+  Date: 2022/4/19
+  Time: 15:53
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <title></title>
+</head>
+<body>
+websocket Demo---- user000 <br />
+<input id="userName" type="text" />
+<button onclick="connect2server()"> Connect </button>
+<br />
+
+<input id="text" type="text" />
+<button onclick="send()"> Send </button>
+<button   onclick="closeWebSocket()"> Close </button>
+<div id="message">   </div>
+
+<script type="text/javascript">
+    let websocket;
+
+    function connect2server(){
+        //判断当前浏览器是否支持WebSocket
+        if('WebSocket' in window){
+            var userName = document.getElementById("userName").value;
+            websocket = new WebSocket("ws://localhost:8080/EChat_Web_exploded/websocketTest/"+userName);
+            setMessageInnerHTML("Connect success");
+            console.log("link success")
+        }else{
+            setMessageInnerHTML("当前浏览器不支持websocket");
+            alert('Not support websocket')
+        }
+    }
+
+
+    //连接发生错误的回调方法
+    websocket.onerror = function(){
+        setMessageInnerHTML("error");
+    };
+
+    //连接成功建立的回调方法
+    websocket.onopen = function(event){
+        setMessageInnerHTML("open");
+    }
+    console.log("-----")
+    //接收到消息的回调方法
+    websocket.onmessage = function(event){
+        setMessageInnerHTML(event.data);
+    }
+
+    //连接关闭的回调方法
+    websocket.onclose = function(){
+        setMessageInnerHTML("close");
+    }
+
+    //监听窗口关闭事件，当窗口关闭时，主动去关闭websocket连接，防止连接还没断开就关闭窗口，server端会抛异常。
+    window.onbeforeunload = function(){
+        websocket.close();
+    }
+
+    //将消息显示在网页上
+    function setMessageInnerHTML(innerHTML){
+        document.getElementById('message').innerHTML += innerHTML + '<br/>';
+    }
+
+    //关闭连接
+    function closeWebSocket(){
+        websocket.close();
+    }
+
+    //发送消息
+    function send(){
+        var message = document.getElementById('text').value;
+        websocket.send(message);
+    }
+</script>
+
+</body>
+</html>
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+Diff line change
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+    .idea
+    lib
+    out
+    target