1.介绍
有关Session的管理方式这里就不再进行讨论,目前无非就是三种单机Session(基于单机内存,无法部署多台机器)、基于Cookie(安全性差)、基于全局的统一Session管理(redis、mysql)等多种方式
针对于像淘宝这种超大型网站来说Session如何管理的就无从得知了、但是可以通过yy的方式想象一下,这种大型架构都需要部署多台认证Server,但是一般来说集中式Session无法存储那么多的Session
那么就可以通过UID分片的形式来存储,不同UID分布在不同的Server上认证即可(纯属猜测丷)
2.快速开始
这里采用的是redis进行集中式Session管理,核心如下依赖
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session</artifactId>
<version>1.2.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-redis</artifactId>
</dependency>
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完整pom.xml
<?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">
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.1.RELEASE</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>springboot-4</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session</artifactId>
<version>1.2.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>1.4.1.RELEASE</version>
</plugin>
</plugins>
</build>
</project>
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application.yaml配置
这块主要是通过application.yaml去配置redis的链接信息
server:
port: 8080
spring:
redis:
database: 1
host: localhost
pool:
max-active: 20
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开启@EnableRedisHttpSession
通过加上@EnableRedisHttpSession
注解,开启redis集中式session管理,所有的session都存放到了redis中
@SpringBootApplication
@EnableRedisHttpSession
public class AppApplication {
public static void main(String[] args) throws Exception {
SpringApplication.run(AppApplication.class, args);
}
}
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通过源码可知、可以通过设置maxInactiveIntervalInSeconds来设定session的统一过期时间,
@Retention(java.lang.annotation.RetentionPolicy.RUNTIME)
@Target({ java.lang.annotation.ElementType.TYPE })
@Documented
@Import(RedisHttpSessionConfiguration.class)
@Configuration
public @interface EnableRedisHttpSession {
int maxInactiveIntervalInSeconds() default 1800;
String redisNamespace() default "";
RedisFlushMode redisFlushMode() default RedisFlushMode.ON_SAVE;
}
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通过redis集中式管理session这种方式在使用上面对客户端是透明的,无需自己操作redis,在使用HttpSession对象的时候直接使用即可
@RestController
public class IndexController {
@GetMapping("/index")
public ResponseEntity index(HttpSession httpSession) {
httpSession.setAttribute("user", "helloword");
return ResponseEntity.ok("ok");
}
@GetMapping("/helloword")
public ResponseEntity hello(HttpSession httpSession) {
return ResponseEntity.ok(httpSession.getAttribute("user"));
}
}
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3. 其他扩展
SpringBoot Session集中式管理不仅仅限于redis这种方式,目前内部支持HttpSession with Pivotal GemFire、HttpSession with JDBC、HttpSession with Mongo
等多种方式具体可以参考http://docs.spring.io/spring-session/docs/1.2.2.RELEASE/reference/html5/#httpsession-jdbc
本文代码
https://git.oschina.net/wangkang_daydayup/SpringBoot-Learn/tree/master
springboot-4
原文地址:https://www.cnblogs.com/xifenglou/p/8503258.html