1.新建一個springboot工程，新增websocket、Thymleaf，Security依賴

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId
 
>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId
 
>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-websocket</artifactId>
        </dependency>

2.配置WebSocket

package com.cvsea.config;

import org.springframework.context.annotation.Configuration;
import
 
 org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.AbstractWebSocketMessageBrokerConfigurer;
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer{

    @Override
    public void registerStompEndpoints(StompEndpointRegistry P_Registry) {
        P_Registry.addEndpoint("/endpointChat").withSockJS();
    }

    @Override
    public void configureMessageBroker(MessageBrokerRegistry P_Registry) {
        P_Registry.enableSimpleBroker("/queue");
    }

}

3.配置SpringSecurity

package com.cvsea.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests().antMatchers("/", "/login").permitAll().anyRequest().authenticated().and().formLogin().loginPage("/login")
                .defaultSuccessUrl("/chat").permitAll().and().logout().permitAll();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication().withUser("pxs").password("123456").roles("USER").and().withUser("lgp").password("123456").roles("USER");
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/resources/static/**");
    }

}

4.配置WebMVC

package com.cvsea.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter{

    @Override
    public void addViewControllers(ViewControllerRegistry P_Registry) {
        P_Registry.addViewController("/login").setViewName("/login");
        P_Registry.addViewController("/chat").setViewName("/chat");
    }

}

5.前端控制器

package com.cvsea.contoller;

import java.security.Principal;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.simp.SimpMessagingTemplate;
import org.springframework.stereotype.Controller;

@Controller
public class ChatContoller {

    @Autowired
    private SimpMessagingTemplate messagingTemplate;

    @MessageMapping("/chat")
    public void handleChat(Principal P_Principal,String msg)
    {
        String strSendTo=P_Principal.getName().equals("pxs")?"lgp":"pxs";
        System.out.println("strSendTo:"+strSendTo);
        messagingTemplate.convertAndSendToUser(strSendTo, "/queue/notifications", P_Principal.getName()+"-Send:"+msg);
    }
}

6.登入

/src/main/resources/templates/login.html

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8"/>
<title>登入</title>
</head>
<body>
 <div th:if="${param.error}">無效的賬號和密碼</div>
 <div th:if="${param.logout}">你已登出</div>
<form th:action="@{/login}" method="post">
    <div><label>賬號：<input type="text" name="username"/></label></div>
    <div><label>密碼：<input type="password" name="password"/></label></div>
    <div><input type="submit" value="登入"/></div>
</form>
</body>
</html>

7.聊天主介面

/src/main/resources/templates/chat.html

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8" />
<title>即時通訊</title>
<script th:src="@{/websocket/js/sockjs.min.js}"></script>
<script th:src="@{/websocket/js/stomp.min.js}"></script>
<script th:src="@{/common/js/jquery.min.js}"></script>
</head>
<body>
    <h2>即時通訊</h2>
    <form id="cvseaForm">
        <textarea rows="4" cols="60" name="text" id="content"></textarea>
        <input type="submit" value="傳送" />
    </form>
    <input type="button" value="斷開連線" id="stop" />
    <ul id="response"></ul>

    <script th:inline="javascript">
        var sock = new SockJS("endpointChat");
        var stomp = Stomp.over(sock);
        stomp.connect("guest", "guest", function(frame) {
            stomp.subscribe("/user/queue/notifications", handleNotification);
        });

        $("#cvseaForm").submit(function(e) {
            e.preventDefault();
            var content = $("#content").val();
            sendSpittle(content);
        });

        function handleNotification(message) {
            $("#response").append("<li>Re:" + message.body + "</li>");
        }

        function sendSpittle(message) {
            stomp.send("/chat", {}, message);
        }

        $("#stop").click(function() {
            sock.close();
        });
    </script>
</body>
</html>

8.新增js指令碼到/src/main/resources/static/

#stomp.min.js存放在/websocket/js/
http://www.bootcdn.cn/stomp.js/
#sockjs.min.js存放在/websocket/js/
http://www.bootcdn.cn/sockjs-client/
#jquery.min.js存放在/common/js/
http://www.bootcdn.cn/jquery/

9.執行測試

• 登入
  
• 聊天