Spring Session -redis

SpringBoot之使用Spring Session集羣-redis

用nginx作負載的時候，會出現每一次http請求都會分配到不一樣的tomcat上，這樣用session存儲用戶數據就會有問題。由於tomcat集羣之間沒有實現session共享。java

spring-session跟redis很好的幫咱們解決了這個問題。nginx

1、引入maven依賴web

 
      01 
      <?xml version="1.0" encoding="UTF-8"?> 
     
      02 
      <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     
      03 
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 
     
      04 
          <modelVersion>4.0.0</modelVersion> 
     
      05 
        
      06 
          <groupId>com.cicoding.druid</groupId> 
     
      07 
          <artifactId>springboot_session_redis_colony</artifactId> 
     
      08 
          <version>0.0.1-SNAPSHOT</version> 
     
      09 
          <packaging>war</packaging> 
     
      10 
        
      11 
          <name>springboot_session_redis_colony</name> 
     
      12 
          <description>Demo project for Spring Boot</description> 
     
      13 
        
      14 
          <parent> 
     
      15 
              <groupId>org.springframework.boot</groupId> 
     
      16 
              <artifactId>spring-boot-starter-parent</artifactId> 
     
      17 
              <version>1.5.9.RELEASE</version> 
     
      18 
              <relativePath /> <!-- lookup parent from repository --> 
     
      19 
          </parent> 
     
      20 
        
      21 
          <properties> 
     
      22 
              <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
     
      23 
              <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> 
     
      24 
              <java.version>1.8</java.version> 
     
      25 
          </properties> 
     
      26 
        
      27 
          <dependencies> 
     
      28 
              <dependency> 
     
      29 
                  <groupId>org.springframework.boot</groupId> 
     
      30 
                  <artifactId>spring-boot-starter-data-redis</artifactId> 
     
      31 
              </dependency> 
     
      32 
              <dependency> 
     
      33 
                  <groupId>org.springframework.session</groupId> 
     
      34 
                  <artifactId>spring-session-data-redis</artifactId> 
     
      35 
              </dependency> 
     
      36 
                
      37 
              <dependency> 
     
      38 
                  <groupId>org.springframework.boot</groupId> 
     
      39 
                  <artifactId>spring-boot-starter-web</artifactId> 
     
      40 
              </dependency> 
     
      41 
          </dependencies> 
     
      42 
        
      43 
          <build> 
     
      44 
              <plugins> 
     
      45 
                  <plugin> 
     
      46 
                      <groupId>org.springframework.boot</groupId> 
     
      47 
                      <artifactId>spring-boot-maven-plugin</artifactId> 
     
      48 
                  </plugin> 
     
      49 
              </plugins> 
     
      50 
          </build> 
     
      51 
      </project>

2、配置application.propertiesredis

server.port=8082
spring.redis.host=localhost
spring.redis.port=6379
spring.redis.password=redis password

# spring session使用存儲類型
spring.session.store-type=redis

spirngboot默認就是使用redis方式，若是不想用能夠填none。

3、在啓動類中加入@EnableRedisHttpSession 註解spring

package com.cicoding;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;

@EnableCaching
@EnableRedisHttpSession  
@SpringBootApplication
public class SessionApplication {

	public static void main(String[] args) {
		SpringApplication.run(SessionApplication.class, args);
	}
}

4、編寫控制器apache

package com.cicoding.controller;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping(value = "/")
public class UserController {

	@ResponseBody
    @RequestMapping(value = "/session")
    public Map<String, Object> getSession(HttpServletRequest request) {
        request.getSession().setAttribute("username", "admin");
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("sessionId", request.getSession().getId());
        return map;
    }

    @ResponseBody
    @RequestMapping(value = "/get")
    public String get(HttpServletRequest request) {
        String userName = (String) request.getSession().getAttribute("username");

        return userName;
    }

}

5、測試tomcat