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  • Session共享解决方案

    使用nginx做的负载均衡添加一个ip_hash配置

    一.开两个Tomcat写测试程序

    @WebServlet("/nginxSessionServlet")
    public class NginxSessionServlet  extends HttpServlet {
    
        @Override
        protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
           doGet(req,resp);
        }
    
        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
            System.out.println("当前使用端口:"+req.getLocalPort());
            String action = req.getParameter("action");
            if (action.equals("setSession")){
                req.getSession().setAttribute("username","wnwn");
                resp.getWriter().write("success");
            }else if (action.equals("getSession")){
                resp.getWriter().write((String)req.getSession().getAttribute("username"));
            }
        }
    }

    二.配置配置nginx.conf文件

     upstream myserver{
             ip_hash;
             server 127.0.0.1:8080;
             server 127.0.0.1:8081;
        }
        server{
            listen       81;
            server_name  www.bproject.com;
            location / {
                root   html;
                proxy_pass  http://myserver;
                index  index.html index.htm;
            }
        }

    三.启动nginx,并访问

     当第一次请求时,负载均衡将请求转发到8080端口上,因为配置了ip_hash,所以每次请求都会转发到8080端口上,相当于把请求和8080端口粘到一块了。

    利用spring-session+Redis

    一:创建一个springboot工程,启动两次,端口分别为8082和8083导入依赖

     <!--spring boot 与redis应用基本环境配置 -->
            <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-redis -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-redis</artifactId>
            </dependency>
    
            <!--spring session 与redis应用基本环境配置,需要开启redis后才可以使用,不然启动Spring boot会报错 -->
            <dependency>
                <groupId>org.springframework.session</groupId>
                <artifactId>spring-session-data-redis</artifactId>
            </dependency>

    二.测试

    @RestController
    public class SessionController {
    
        @RequestMapping("/setSession")
        public String setSession(HttpServletResponse response, HttpServletRequest request) throws IOException {
            request.getSession().setAttribute("username","wang");
            return "success";
        }
    
        @RequestMapping("/getSession")
        public String getSession(HttpServletRequest request,HttpServletResponse response){
            String username = (String) request.getSession().getAttribute("username");
            return username;
        }
    }

    三.配置application.properties文件

    server.port=8082
    #server.port=8083
    
    #redis配置
    spring.redis.password: wang2003

    四.启动测试

    页面返回success时,就成功将数据添加到Redis缓存中了

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  • 原文地址:https://www.cnblogs.com/danxun/p/12300048.html
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