spring boot +WebSocket(三) 点对点式

前两篇博客演示了广播式的websocket 推送。
广播式有自己的应用场景,但是广播式不能解决我门一个常见的场景,即消息由谁发送、由谁接收的问题。

本例中演示了一个简单的聊天室程序。例子中只有两个用户,互相发送消息给彼此,因需要用户相关内容,所以这里引入了最简单的spring Security相关内容。


本文原代码会在文章末尾给出,但是原代码中包含
spring boot +WebSocket 广播式(一)、
spring boot +WebSocket 广播式(二)
的代码

本文目录:

后台

1.新建maven工程

2.新建Websocket 配置类

3.新建WebSecurityConfig配置

4.新建java bean

5.新建WebSocketController类

7.新建映射类WebMvcConfig

8.新建Application 启动类

前台

1.导入脚本

2.编写login.html

3.编写chat.html

效果


后台

1.新建maven工程

新建maven 工程,pom.xml 文件内容如下:


<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>4.0.0modelVersion>

    <groupId>com.us.examplegroupId>
    <artifactId>springWebSocketartifactId>
    <version>1.0-SNAPSHOTversion>

    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>1.3.0.RELEASEversion>
    parent>

    <properties>
        <start-class>com.us.Applicationstart-class>
        <maven.compiler.target>1.8maven.compiler.target>
        <maven.compiler.source>1.8maven.compiler.source>
    properties>

    <dependencies>

        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starterartifactId>
        dependency>

        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-thymeleafartifactId>
        dependency>

        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>

        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-websocketartifactId>
        dependency>

        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-securityartifactId>
        dependency>
    dependencies>
project>

2.新建WebsocketConfig 配置类

package com.us.example.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;

/**
 * Created by yangyibo on 16/12/29.
 */
@Configuration
@EnableWebSocketMessageBroker
//通过EnableWebSocketMessageBroker 开启使用STOMP协议来传输基于代理(message broker)的消息,此时浏览器支持使用@MessageMapping 就像支持@RequestMapping一样。
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer{


    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) { //endPoint 注册协议节点,并映射指定的URl

        //注册一个名字为"endpointChat" 的endpoint,并指定 SockJS协议。   点对点-用
        registry.addEndpoint("/endpointChat").withSockJS();
    }


    @Override
    public void configureMessageBroker(MessageBrokerRegistry registry) {//配置消息代理(message broker)
        //点对点式增加一个/queue 消息代理
        registry.enableSimpleBroker("/queue","/topic");

    }
}

3.新建WebSecurityConfig配置

package com.us.example.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()//根路径和/login路径不拦截
                .anyRequest().authenticated()
                .and()
                .formLogin()
                .loginPage("/login") //2登陆页面路径为/login
                .defaultSuccessUrl("/chat") //3登陆成功转向chat页面
                .permitAll()
                .and()
                .logout()
                .permitAll();
    }

    //4在内存中配置两个用户 wyf 和 wisely ,密码和用户名一致,角色是 USER
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
            auth
                .inMemoryAuthentication()
                .withUser("wyf").password("wyf").roles("USER")
                .and()
                .withUser("wisely").password("wisely").roles("USER");
    }
    //5忽略静态资源的拦截
    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/resources/static/**");
    }

}

4.新建java bean

package com.us.example.bean;

/**
 * Created by yangyibo on 16/12/29.
 */
public class Message {
    private String name;

    public String getName(){
        return name;
    }
}

5.新建WebSocketController类

package com.us.example.controller;

import com.us.example.bean.Message;
import com.us.example.bean.Response;
import com.us.example.service.WebSocketService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.messaging.simp.SimpMessagingTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.security.Principal;

/**
 * Created by yangyibo on 16/12/29.
 *
 */
@Controller
public class WebSocketController {
    @Autowired
    private SimpMessagingTemplate messagingTemplate;

    @MessageMapping("/chat")
    //在springmvc 中可以直接获得principal,principal 中包含当前用户的信息
    public void handleChat(Principal principal, Message message) {

        /**
         * 此处是一段硬编码。如果发送人是wyf 则发送给 wisely 如果发送人是wisely 就发送给 wyf。
         */
        if (principal.getName().equals("wyf")) {
            //通过convertAndSendToUser 向用户发送信息,
            // 第一个参数是接收消息的用户,第二个参数是浏览器订阅的地址,第三个参数是消息本身

            messagingTemplate.convertAndSendToUser("wisely",
                    "/queue/notifications", principal.getName() + "-send:"
                            + message.getName());
        } else {
            messagingTemplate.convertAndSendToUser("wyf",
                    "/queue/notifications", principal.getName() + "-send:"
                            + message.getName());
        }
    }
}

7.新建映射类WebMvcConfig

为HTML 提供便捷的路径映射。

package com.us.example.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 registry) {
           registry.addViewController("/login").setViewName("/login");
           registry.addViewController("/chat").setViewName("/chat");
       }

}

8.新建Application 启动类

package com.us.example;

/**
 * Created by yangyibo on 16/12/29.
 */
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.scheduling.annotation.EnableScheduling;

import static org.springframework.boot.SpringApplication.run;

@ComponentScan(basePackages ="com.us.example")
@SpringBootApplication
@EnableScheduling
public class Application {

    public static void main(String[] args) {
        ConfigurableApplicationContext run = run(Application.class, args);
    }
}

前台

1.导入脚本

添加脚本,将stomp.js、sockjs.min.js 以及jQuery 脚本放在src/main/resources/static下。

2.编写login.html

在src/main/resources/templates 下新建 login.html。(源代码会在文章底部给出)

<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
      xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<meta charset="UTF-8" />
<head>
    <title>登陆页面title>
head>
<body>
<div th:if="${param.error}">
    无效的账号和密码
div>
<div th:if="${param.logout}">
    你已注销
div>
<form th:action="@{/login}" method="post">
    <div><label> 账号 : <input type="text" name="username"/> label>div>
    <div><label> 密码: <input type="password" name="password"/> label>div>
    <div><input type="submit" value="登陆"/>div>
form>
body>
html>

3.编写chat.html

在src/main/resources/templates 下新建 chat.html。(源代码会在文章底部给出)


<html xmlns:th="http://www.thymeleaf.org">
<meta charset="UTF-8" />
<head>
    <title>Hometitle>
    <script th:src="@{sockjs.min.js}">script>
    <script th:src="@{stomp.min.js}">script>
    <script th:src="@{jquery.js}">script>
head>
<body>
<p>
    聊天室
p>

<form id="wiselyForm">
    <textarea rows="4" cols="60" name="text">textarea>
    <input type="submit"/>
form>

<script th:inline="javascript">
    $('#wiselyForm').submit(function(e){
        e.preventDefault();
        var text = $('#wiselyForm').find('textarea[name="text"]').val();
        sendSpittle(text);
    });
    //链接endpoint名称为 "/endpointChat" 的endpoint。
    var sock = new SockJS("/endpointChat");
    var stomp = Stomp.over(sock);
    stomp.connect('guest', 'guest', function(frame) {

        /**
 订阅了/user/queue/notifications 发送的消息,这里雨在控制器的 convertAndSendToUser 定义的地址保持一致,

         *  这里多用了一个/user,并且这个user 是必须的,使用user 才会发送消息到指定的用户。

         *  */
        stomp.subscribe("/user/queue/notifications", handleNotification);
    });



    function handleNotification(message) {
        $('#output').append("Received: " + message.body + "
"
) } function sendSpittle(text) { stomp.send("/chat", {}, JSON.stringify({ 'name': text }));//3 } $('#stop').click(function() {sock.close()}); script> <div id="output">div> body> html>

效果

打开两个浏览器,访问http://localhost:8080/login 进行登录,两个用户是wyf 和 wisely 账号密码一样。

登录成功后就可以相互发送信息聊天了。

spring boot +WebSocket(三) 点对点式_第1张图片
spring boot +WebSocket(三) 点对点式_第2张图片


本文参考:《JavaEE开发的颠覆者:Spring Boot实战 》

本文源代码:https://github.com/527515025/springBoot.git

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