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