WebSocket+String
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WebSocket+String
1、 新建一个maven项目
2、 修改pom.xml，完整的pom.xml如下：
<projectxmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>my</groupId> <artifactId>WebSocket_String_test1</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>WebSocket_String_test1 MavenWebapp</name> <url>http://maven.apache.org</url> <properties> <spring-version>4.2.5.RELEASE</spring-version> <hibernate-version>4.3.0</hibernate-version> <project-build-encode>UTF-8</project-build-encode> <jackson-version>2.8.3</jackson-version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.0.1</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.3</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <version>2.2.1</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.3</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.6</version> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging-api</artifactId> <version>1.1</version> </dependency> <dependency> <groupId>commons-collections</groupId> <artifactId>commons-collections</artifactId> <version>3.2.1</version> </dependency> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.5</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.12</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-jpa</artifactId> <version>1.4.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-commons</artifactId> <version>1.6.1.RELEASE</version> </dependency> <!--Spring 配置 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-messaging</artifactId> <version>4.2.5.RELEASE</version> </dependency> <!--spring websocket--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-websocket</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>antlr</groupId> <artifactId>antlr</artifactId> <version>2.7.7</version> </dependency> <dependency> <groupId>aopalliance</groupId> <artifactId>aopalliance</artifactId> <version>1.0</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>1.7.4</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.3.2</version> </dependency> <dependency> <groupId>dom4j</groupId> <artifactId>dom4j</artifactId> <version>1.6.1</version> </dependency> <dependency> <groupId>org.hibernate.common</groupId> <artifactId>hibernate-commons-annotations</artifactId> <version>4.0.2.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>4.2.5.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>4.2.5.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>4.3.0.Final</version> </dependency> <dependency> <groupId>org.hibernate.javax.persistence</groupId> <artifactId>hibernate-jpa-2.0-api</artifactId> <version>1.0.1.Final</version> </dependency> <dependency> <groupId>org.javassist</groupId> <artifactId>javassist</artifactId> <version>3.15.0-GA</version> </dependency> <dependency> <groupId>org.jboss.logging</groupId> <artifactId>jboss-logging</artifactId> <version>3.1.0.GA</version> </dependency> <dependency> <groupId>org.jboss.spec.javax.transaction</groupId> <artifactId>jboss-transaction-api_1.1_spec</artifactId> <version>1.0.1.Final</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.12</version> </dependency> <!-- 要把这个注释掉与 Spring websocket冲突 <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> <version>7.0</version> <scope>provided</scope> </dependency> --> </dependencies> <build> <finalName>MySocket</finalName> <!-- 编译的时候使用JDK7和UTF8编码 ,--> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin> <!-- 编译jar包 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-jar-plugin</artifactId> <configuration> <archive> <addMavenDescriptor>false</addMavenDescriptor> <manifest> <addDefaultImplementationEntries>true</addDefaultImplementationEntries> <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries> </manifest> </archive> </configuration> </plugin> </plugins> </build></project>3、 在src/main/java目录下，新建一个mytest包
4、 在mytest包中创建ChatWebSocketHandler.java，代码如下：
package mytest; import java.io.IOException;import java.util.ArrayList;import java.util.Collections;import java.util.List; import org.springframework.web.socket.CloseStatus;importorg.springframework.web.socket.TextMessage;importorg.springframework.web.socket.WebSocketSession;importorg.springframework.web.socket.handler.TextWebSocketHandler; public class ChatWebSocketHandlerextends TextWebSocketHandler{ privatefinal static List<WebSocketSession> sessions =Collections.synchronizedList(new ArrayList<WebSocketSession>()); //接收文本消息，并发送出去 @Override protected void handleTextMessage(WebSocketSession session, TextMessagemessage) throws Exception { super.handleTextMessage(session,message); sendMessageToUsers(session, message);//发送所有人 } //连接建立后处理 @SuppressWarnings("unchecked") @Override public void afterConnectionEstablished(WebSocketSession session) throwsException { System.out.println("connect to thewebsocket chat success......"); sessions.add(session); //处理离线消息 } //抛出异常时处理 @Override public void handleTransportError(WebSocketSession session, Throwableexception) throws Exception { if(session.isOpen()){ session.close(); } System.out.println("websocket chatconnection closed......"); sessions.remove(session); } //连接关闭后处理 @Override public void afterConnectionClosed(WebSocketSession session, CloseStatuscloseStatus) throws Exception { System.out.println("websocket chatconnection closed......"); sessions.remove(session); } @Override public boolean supportsPartialMessages() { return false; } //发送消息方法 private voidsendMessageToUsers(WebSocketSession session, TextMessagemessage) throws IOException { //循环在线会话，发送消息 for (WebSocketSessionitemSession : sessions) { if(itemSession.isOpen()) { itemSession.sendMessage(message); } } }}5、 在mytest包中创建WebSocketHandshakeInterceptor.java，代码如下：
package mytest; import java.util.Map; import javax.servlet.http.HttpSession; import org.springframework.http.server.ServerHttpRequest;import org.springframework.http.server.ServerHttpResponse;import org.springframework.http.server.ServletServerHttpRequest;import org.springframework.web.socket.WebSocketHandler;import org.springframework.web.socket.server.HandshakeInterceptor; public class WebSocketHandshakeInterceptor implements HandshakeInterceptor { private static final String SESSION_NAME ="username";private String userName; @Override public boolean beforeHandshake(ServerHttpRequestrequest, ServerHttpResponse response, WebSocketHandler wsHandler,Map<String, Object> attributes) throws Exception { if (request instanceofServletServerHttpRequest) { HttpSessionsession = ((ServletServerHttpRequest)request).getServletRequest().getSession(); userName= (String) session.getAttribute(SESSION_NAME); if(userName == null) { userName= "访客" + session.getId() ; session.setAttribute(SESSION_NAME,userName); } attributes.put("username",userName); } return true; } @Override public voidafterHandshake(ServerHttpRequest request, ServerHttpResponse response,WebSocketHandler wsHandler, Exception exception) { }}
6、 在mytest包中创建WebSocketConfig.java，代码如下：
package mytest; import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.EnableWebMvc;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;import org.springframework.web.socket.config.annotation.EnableWebSocket;import org.springframework.web.socket.config.annotation.WebSocketConfigurer;import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry; @Configuration@EnableWebMvc@EnableWebSocketpublic class WebSocketConfig extends WebMvcConfigurerAdapter implementsWebSocketConfigurer { @Override public voidregisterWebSocketHandlers(WebSocketHandlerRegistry registry) { //允许连接的域,只能以http或https开头 // String[] allowsOrigins = {"http://www.xxx.com"}; String[] allowsOrigins ={"*"}; //WebIM WebSocket通道 registry.addHandler(chatWebSocketHandler(),"/webSocketIMServer").setAllowedOrigins(allowsOrigins).addInterceptors(myInterceptor()); registry.addHandler(chatWebSocketHandler(),"/sockjs/webSocketIMServer").setAllowedOrigins(allowsOrigins).addInterceptors(myInterceptor()).withSockJS(); } @Bean public ChatWebSocketHandlerchatWebSocketHandler() { return new ChatWebSocketHandler(); } @Bean public WebSocketHandshakeInterceptormyInterceptor(){ return newWebSocketHandshakeInterceptor(); }}
7、 在src/main/resources中，创建spring-mvc.xml，内容如下：
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xmlns:tx="http://www.springframework.org/schema/tx"xmlns:jpa="http://www.springframework.org/schema/data/jpa"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/data/jpahttp://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd http://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.0.xsd"> <!--会自动注册DefaultAnnotationHandlerMapping与AnnotationMethodHandlerAdapter两个bean, 位spring MVC的注解提供支持 。 --> <mvc:annotation-driven /> <context:component-scanbase-package="mytest"/> <!--静态资源访问（不拦截此目录下的东西的访问） --> <mvc:resourceslocation="/imgs/" mapping="/imgs/**" /> </beans>
8、 配置web.xml，全部代码如下：
<?xml version="1.0" encoding="UTF-8"?><web-appxmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://java.sun.com/xml/ns/javaee"xsi:schemaLocation="http://java.sun.com/xml/ns/javaeehttp://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"id="WebApp_ID"version="2.5"> <display-name>Archetype Created WebApplication</display-name> <servlet> <servlet-name>webserver</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>webserver</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping></web-app>
9、 修改index.jsp，全部代码如下：
<%@page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><!DOCTYPEhtml PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><metahttp-equiv="Content-Type" content="text/html;charset=UTF-8"><title>Inserttitle here</title></head><body>Welcome<br/><input id="text"type="text"/> <button onclick="send()">发送消息</button> <hr/> <buttononclick="closeWebSocket()">关闭WebSocket连接</button> <hr/> <divid="message"></div><script type="text/javascript"> varwebsocket = null; //判断当前浏览器是否支持WebSocket if('WebSocket' in window) { websocket = newWebSocket("ws://localhost:8088/WebSocket_String_test1/webSocketIMServer"); } else{ alert('当前浏览器 Not support websocket') } //连接发生错误的回调方法 websocket.onerror = function () { //需要部署在Tomcat7.0.47以上的版本才能运行 setMessageInnerHTML("WebSocket连接发生错误"); }; //连接成功建立的回调方法 websocket.onopen = function () { setMessageInnerHTML("WebSocket连接成功"); } //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("WebSocket连接关闭"); } //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 () { closeWebSocket(); } //将消息显示在网页上 function setMessageInnerHTML(innerHTML) { document.getElementById('message').innerHTML += innerHTML +'<br/>'; } //关闭WebSocket连接 function closeWebSocket() { websocket.close(); } //发送消息 function send() { var message = document.getElementById('text').value; websocket.send(message); }</script></body></html>
10、最后进行测试，打开两个浏览器，分别访问这个index.jsp，在其中一个jsp中的文本框输入内容，点击发送消息，看另一个浏览器中是否会有相应变化呢，如果有变化，那么就成功了
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