新增用例
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152
distributed-solution/spring-boot-session/README.md
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distributed-solution/spring-boot-session/README.md
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# spring boot 实现分布式 session
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## 一、项目结构
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<div align="center"> <img src="https://github.com/heibaiying/spring-samples-for-all/blob/master/pictures/spring-boot-session.png"/> </div>
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## 二、分布式session的配置
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#### 2.1 引入依赖
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```xml
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<!--分布式 session 相关依赖-->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-data-redis</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.session</groupId>
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<artifactId>spring-session-data-redis</artifactId>
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</dependency>
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```
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#### 2.2 Redis配置
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```yaml
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spring:
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redis:
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host: 127.0.0.1
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port: 6379
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jedis:
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pool:
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# 连接池最大连接数,使用负值表示无限制。
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max-active: 8
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# 连接池最大阻塞等待时间,使用负值表示无限制。
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max-wait: -1s
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# 连接池最大空闲数,使用负值表示无限制。
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max-idle: 8
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# 连接池最小空闲连接，只有设置为正值时候才有效
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min-idle: 1
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timeout: 300ms
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session:
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# session 存储方式 支持redis、mongo、jdbc、hazelcast
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store-type: redis
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# 如果是集群节点 采用如下配置指定节点
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#spring.redis.cluster.nodes
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```
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有两点需要特别说明：
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1. spring-session 不仅提供了redis作为公共session存储的方案，同时也支持jdbc、mongodb、Hazelcast等作为公共session的存储，可以用session.store-type 指定；
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2. 对于redis 存储方案而言，官方也提供了不止一种整合方式，这里我们选取的整合方案是jedis客户端作为连接，当然也可以使用Lettuce作为客户端连接。
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#### 2.3 启动类上添加@EnableRedisHttpSession 注解开启 spring-session-redis 整合方案的自动配置
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```java
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@SpringBootApplication
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@EnableRedisHttpSession(maxInactiveIntervalInSeconds= 1800) //开启redis session支持,并配置session过期时间
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public class SpringBootSessionApplication {
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public static void main(String[] args) {
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SpringApplication.run(SpringBootSessionApplication.class, args);
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}
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}
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```
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## 三、验证分布式session
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#### 3.1 创建测试controller和测试页面
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```java
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@Controller
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public class LoginController {
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@RequestMapping
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public String index() {
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return "index";
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}
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@RequestMapping("home")
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public String home() {
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return "home";
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}
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@PostMapping("login")
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public String login(User user, HttpSession session) {
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// 随机生成用户id
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user.setUserId(Math.round(Math.floor(Math.random() * 10 * 1000)));
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// 将用户信息保存到id中
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session.setAttribute("USER", user);
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return "home";
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}
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}
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```
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登录页面index.ftl：
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```jsp
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<!doctype html>
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<html lang="en">
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<head>
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<title>登录页面</title>
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</head>
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<body>
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<form action="/login" method="post">
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用户：<input type="text" name="username"><br/>
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密码：<input type="password" name="password"><br/>
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<button type="submit">登录</button>
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</form>
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</body>
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</html>
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```
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session 信息展示页面home.ftl：
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```jsp
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<!doctype html>
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<html lang="en">
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<head>
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<title>主页面</title>
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</head>
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<body>
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<h5>登录用户: ${Session["USER"].username} </h5>
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<h5>用户编号: ${Session["USER"].userId} </h5>
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</body>
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</html>
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```
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#### 3.2 启动项目
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由于我们这里采用的是spring boot 的内置容器作为web容器，所以直接启动两个实例测试即可。
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应用1启动配置：
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<div align="center"> <img src="https://github.com/heibaiying/spring-samples-for-all/blob/master/pictures/spring-boot-session-app1.png"/> </div>
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应用2启动配置，需要用 `--server.port `指定不同的端口号：
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<div align="center"> <img src="https://github.com/heibaiying/spring-samples-for-all/blob/master/pictures/spring-boot-session-app2.png"/> </div>
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**测试结果：**
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<div align="center"> <img src="https://github.com/heibaiying/spring-samples-for-all/blob/master/pictures/spring-boot-session-8080.png"/> </div>
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<div align="center"> <img src="https://github.com/heibaiying/spring-samples-for-all/blob/master/pictures/spring-boot-session-8090.png"/> </div>
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60
distributed-solution/spring-boot-session/pom.xml
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distributed-solution/spring-boot-session/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.1.2.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<groupId>com.heibaiying</groupId>
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<artifactId>spring-boot-session</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>spring-boot-session</name>
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<description>spring session project for Spring Boot</description>
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<properties>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-data-redis</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-freemarker</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.session</groupId>
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<artifactId>spring-session-data-redis</artifactId>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<optional>true</optional>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>
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package com.heibaiying.springboot;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;
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@SpringBootApplication
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@EnableRedisHttpSession(maxInactiveIntervalInSeconds= 1800) //开启redis session支持,并配置session过期时间
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public class SpringBootSessionApplication {
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public static void main(String[] args) {
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SpringApplication.run(SpringBootSessionApplication.class, args);
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}
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}
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package com.heibaiying.springboot.bean;
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import lombok.Data;
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import java.io.Serializable;
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/**
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* @author : heibaiying
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*/
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@Data
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public class User implements Serializable {
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private long userId;
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private String username;
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private String password;
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}
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package com.heibaiying.springboot.controller;
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import com.heibaiying.springboot.bean.User;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.RequestMapping;
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import javax.servlet.http.HttpSession;
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/**
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* @author : heibaiying
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* @description : 登录
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*/
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@Controller
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public class LoginController {
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@RequestMapping
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public String index() {
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return "index";
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}
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@RequestMapping("home")
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public String home() {
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return "home";
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}
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@PostMapping("login")
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public String login(User user, HttpSession session) {
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// 随机生成用户id
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user.setUserId(Math.round(Math.floor(Math.random() * 10 * 1000)));
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// 将用户信息保存到id中
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session.setAttribute("USER", user);
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return "home";
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}
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}
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spring:
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redis:
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host: 127.0.0.1
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port: 6379
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jedis:
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pool:
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# 连接池最大连接数,使用负值表示无限制。
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max-active: 8
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# 连接池最大阻塞等待时间,使用负值表示无限制。
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max-wait: -1s
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# 连接池最大空闲数,使用负值表示无限制。
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max-idle: 8
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# 连接池最小空闲连接，只有设置为正值时候才有效
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min-idle: 1
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timeout: 300ms
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session:
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# session 存储方式 支持redis、mongo、jdbc、hazelcast
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store-type: redis
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# 如果是集群节点 采用如下配置指定节点
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#spring.redis.cluster.nodes
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@ -0,0 +1,10 @@
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<!doctype html>
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<html lang="en">
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<head>
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<title>主页面</title>
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</head>
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<body>
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<h5>登录用户: ${Session["USER"].username} </h5>
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<h5>用户编号: ${Session["USER"].userId} </h5>
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</body>
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</html>
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@ -0,0 +1,13 @@
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<!doctype html>
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<html lang="en">
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<head>
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<title>登录页面</title>
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</head>
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<body>
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<form action="/login" method="post">
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用户：<input type="text" name="username"><br/>
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密码：<input type="password" name="password"><br/>
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<button type="submit">登录</button>
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</form>
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</body>
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</html>
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@ -0,0 +1,17 @@
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package com.heibaiying.springboot;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit4.SpringRunner;
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@RunWith(SpringRunner.class)
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@SpringBootTest
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public class SpringBootSessionApplicationTests {
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@Test
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public void contextLoads() {
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}
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}
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