如何使用redis存储HttpSession

1、代码Demo

1）引入依赖：

<?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>

    <groupId>com.example</groupId>
    <artifactId>helloworld</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>io.spring.platform</groupId>
                <artifactId>platform-bom</artifactId>
                <version>Athens-SR2</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <!-- Import dependency management from Spring Boot -->
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>1.4.3.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <!-- Additional lines to be added here... -->
    <dependencies>
        <dependency>
            <groupId>org.springframework.session</groupId>
            <artifactId>spring-session</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-redis</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>1.4.3.RELEASE</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

2）配置Spring Session

添加@EnableRedisHttpSession注解，该注解会自动创建一个springSessionRepositoryFilter的Filter，这个Filter负责用Spring Session来替换原先的默认HttpSession实现，在这个例子中，Spring Session是用Redis来实现的

import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;

@EnableRedisHttpSession
public class HttpSessionConfig {
    
}

3）操作HttpSession

这里我们将实现两个操作，一个是往Session中写入数据，另一个是查询数据

@RestController
public class Example {

    @RequestMapping("/set")
    String set(HttpServletRequest req) {
        req.getSession().setAttribute("testKey", "testValue");
        return "设置session:testKey=testValue";
    }

    @RequestMapping("/query")
    String query(HttpServletRequest req) {
        Object value = req.getSession().getAttribute("testKey");
        return "查询Session：\"testKey\"=" + value;
    }

}

4）编写main方法

编写main方法，使用@SpringBootApplication注解标注，如果查看该注解源码的话，会发现相当于添加了@SpringBootConfiguration @EnableAutoConfiguration @ComponentScan等注解。

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class APP {
       public static void main(String[] args) throws Exception {
            SpringApplication.run(APP.class, args);
        }
}

5）配置文件

在resources下新建application.properties:

spring.session.store-type = redis
#server.servlet.session.timeout =＃会话超时。如果未指定持续时间后缀，则使用秒。
spring.session.redis.namespace = spring：session＃用于存储会话的键的命名空间。
spring.redis.host = localhost
spring.redis.password = foobared
spring.redis.port = 6379

2、安装redis

3、配置redis

1）下载好redis

2）运行 redis-server.exe

3）打开命令指示符cd到redis文件夹

4）进入redis：输入redis-cli

5）设置密码：config set requirepass “密码”

6）输入密码：auth “密码”

4、查看缓存

1）浏览器输入http://localhost:8080/set，设置Session

2）命令指示符输入 keys *，查看redis是否有数据插入

3）浏览器输入http://localhost:8080/query，查询Session

4）清空缓存（flushall命令）

5）再次打开http://localhost:8080/query，可以看到数据消失，操作成功

本文地址：https://blog.csdn.net/aaaPostcard/article/details/110286650