Redis实现session共享

冷不防 2022-05-11 08:48 311阅读 0赞

一、实现方法：实现以下两步即可：

1、pom文件加上依赖：

<dependency>
                <groupId>org.springframework.session</groupId>
                <artifactId>spring-session-data-redis</artifactId>
            </dependency>
    
    
            <dependency>
                <groupId>org.springframework.session</groupId>
                <artifactId>spring-session</artifactId>        
            </dependency>

2、application.properties配置文件加上以下配置：

spring.redis.host=xxx.xx.xxx.xx
    spring.redis.port=你的redis端口号
    spring.redis.password=xxxxxx
    #以下为redis的其他配置
    spring.redis.jedis.pool.maxTotal=500
    spring.redis.jedis.pool.maxIdle=10
    spring.redis.jedis.pool.maxWaitMillis=5000
    spring.redis.jedis.pool.min-idle=5
    spring.redis.timeout=5000

注意，如果没有配置spring.redis...，则会默认连接localhost:6379的redis。

二、实例：

新建两个工程，一个部署在本地8080端口，一个部署在本地9090端口，两个配置到一个redis上。

8080端口工程：

![70][]

1、pom：

<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>
    	<groupId>com.demo</groupId>
    	<artifactId>sessionRedis</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>1.4.1.RELEASE</version>
    	</parent>
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    
    		
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-redis</artifactId>
    		</dependency>
    		 <dependency>
    			<groupId>org.springframework.session</groupId>
    			<artifactId>spring-session-data-redis</artifactId>
    		</dependency> 
    
    		<dependency>
    			<groupId>org.mybatis.spring.boot</groupId>
    			<artifactId>mybatis-spring-boot-starter</artifactId>
    			<version>1.1.1</version>
    		</dependency>
    		<dependency>
    			<groupId>mysql</groupId>
    			<artifactId>mysql-connector-java</artifactId>
    			<version>5.1.21</version>
    		</dependency>
    
    		<dependency>
    			<groupId>com.alibaba</groupId>
    			<artifactId>fastjson</artifactId>
    			<version>1.2.33</version>
    		</dependency>
    	</dependencies>
    </project>

2、

package com.demo.controller;
    
    import java.util.Date;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpSession;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.CrossOrigin;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.ResponseBody;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.demo.module.Message;
    import com.demo.module.User;
    import com.demo.service.UserService;
    
    @RestController
    @RequestMapping("/user")
    public class UserController {
    
    	@Autowired
    	private UserService userService;
    
    
    	@RequestMapping("/login")
    	public Message login(String name, String pwd,HttpServletRequest req) {
    		User user = userService.select(name, pwd);
    		Message message = new Message();
    		if (user != null) {
    			message.setCode(200);
    			message.setRes(true);
    			message.setMsg("登录成功");
    			HttpSession session = req.getSession();
    			session.setAttribute("user", user.toString());
    		} else {
    			message.setCode(500);
    			message.setRes(false);
    			message.setMsg("登录失败");
    		}
    		System.out.println("message"+message);
    		return message;
    	}
    	
    	@RequestMapping("/main")
    	public String main(HttpServletRequest req){
    		
    		HttpSession session = req.getSession();
    		System.out.println("请求"+session.getId());
    		String user = (String) session.getAttribute("user");
    		System.out.println("8080当前登录用户为"+user);
    		return session.getId();
    	}
    
    	
    //	  @RequestMapping(value = "/first", method = RequestMethod.GET)  
    //	    public Map<String, Object> firstResp (HttpServletRequest request){  
    //	        Map<String, Object> map = new HashMap<>();  
    //	        request.getSession().setAttribute("request Url", request.getRequestURL());  
    //	        map.put("request Url", request.getRequestURL());  
    //	        return map;  
    //	    }  
    //	  
    //	    @RequestMapping(value = "/sessions", method = RequestMethod.GET)  
    //	    public Object sessions (HttpServletRequest request){  
    //	        Map<String, Object> map = new HashMap<>();  
    //	        map.put("sessionId", request.getSession().getId());  
    //	        map.put("message", request.getSession().getAttribute("map"));  
    //	        return map;  
    //	    }  
    }

9090端口工程：

![70 1][]

1、pom:

<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>
    	<groupId>com.demo</groupId>
    	<artifactId>sessionRedis1</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>1.4.1.RELEASE</version>
    	</parent>
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    
    		
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-redis</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.session</groupId>
    			<artifactId>spring-session-data-redis</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>org.mybatis.spring.boot</groupId>
    			<artifactId>mybatis-spring-boot-starter</artifactId>
    			<version>1.1.1</version>
    		</dependency>
    		<dependency>
    			<groupId>mysql</groupId>
    			<artifactId>mysql-connector-java</artifactId>
    			<version>5.1.21</version>
    		</dependency>
    
    		<dependency>
    			<groupId>com.alibaba</groupId>
    			<artifactId>fastjson</artifactId>
    			<version>1.2.33</version>
    		</dependency>
    	</dependencies>
    </project>

两个项目的配置文件只有端口号不一样。

2、

package com.demo.controller;
    
    import java.util.HashMap;
    import java.util.Map;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpSession;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RestController;
     @RestController
     @RequestMapping("/test")
    public class TestController {
    
    	 
    	 @RequestMapping("/test")
    	 public String test(HttpServletRequest request){
    		 HttpSession session = request.getSession();
    		String user = (String) session.getAttribute("user");
    		System.out.println("9090当前登录用户为"+user);
    		return request.getSession().getId();
    	 }
    		
    }

测试：

1、8080上登录：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70][]

2、8080上获取用户：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70 1][]

![20190730113321855.png][]

3、9090上获取用户：

![20190730113346182.png][]

![20190730113359990.png][]

可以看到，两个sessonId是一样的，获取的session是一致的。

[70]: /images/20220511/7e5c932baf7b498c95855c5cb04fa805.png
[70 1]: /images/20220511/f11cf4859a474459bf95867e8518764f.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70]: /images/20220511/a53599c97beb407eb92b4423bc96392b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70 1]: /images/20220511/dc0dc3dc86234c49bb8e4bfb6097f862.png
[20190730113321855.png]: /images/20220511/0e95f4801d2f4669bf96bb28afe89b77.png
[20190730113346182.png]: /images/20220511/cbc2cb5cf5094bd3ae9160431f0c2a11.png
[20190730113359990.png]: /images/20220511/76e6869bf3464cce8f5494bdf689b606.png