這篇文章主要介紹SpringBoot+SpringSession+Redis怎么實現session共享,文中介紹的非常詳細,具有一定的參考價值,感興趣的小伙伴們一定要看完!
springboot一種全新的編程規范,其設計目的是用來簡化新Spring應用的初始搭建以及開發過程,SpringBoot也是一個服務于框架的框架,服務范圍是簡化配置文件。
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.session</groupId> <artifactId>spring-session-data-redis</artifactId> </dependency>
#redis spring.redis.host=127.0.0.1 spring.redis.port=6379 spring.redis.password=123456 spring.redis.pool.max-idle=8 spring.redis.pool.min-idle=0 spring.redis.pool.max-active=8 spring.redis.pool.max-wait=-1 #超時一定要大于0 spring.redis.timeout=3000 spring.session.store-type=redis
在配置redis時需要確保redis安裝正確,并且配置notify-keyspace-events Egx,spring.redis.timeout設置為大于0,我當時這里配置為0時springboot時啟不起來。
//攔截登錄失效的請求 public class RedisSessionInterceptor implements HandlerInterceptor { @Autowired private StringRedisTemplate redisTemplate; @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { //無論訪問的地址是不是正確的,都進行登錄驗證,登錄成功后的訪問再進行分發,404的訪問自然會進入到錯誤控制器中 HttpSession session = request.getSession(); if (session.getAttribute("loginUserId") != null) { try { //驗證當前請求的session是否是已登錄的session String loginSessionId = redisTemplate.opsForValue().get("loginUser:" + (long) session.getAttribute("loginUserId")); if (loginSessionId != null && loginSessionId.equals(session.getId())) { return true; } } catch (Exception e) { e.printStackTrace(); } } response401(response); return false; } private void response401(HttpServletResponse response) { response.setCharacterEncoding("UTF-8"); response.setContentType("application/json; charset=utf-8"); try { response.getWriter().print(JSON.toJSONString(new ReturnData(StatusCode.NEED_LOGIN, "", "用戶未登錄!"))); } catch (IOException e) { e.printStackTrace(); } } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { } }
@Configuration public class WebSecurityConfig extends WebMvcConfigurerAdapter { @Bean public RedisSessionInterceptor getSessionInterceptor() { return new RedisSessionInterceptor(); } @Override public void addInterceptors(InterceptorRegistry registry) { //所有已api開頭的訪問都要進入RedisSessionInterceptor攔截器進行登錄驗證,并排除login接口(全路徑)。必須寫成鏈式,分別設置的話會創建多個攔截器。 //必須寫成getSessionInterceptor(),否則SessionInterceptor中的@Autowired會無效 registry.addInterceptor(getSessionInterceptor()).addPathPatterns("/api/**").excludePathPatterns("/api/user/login"); super.addInterceptors(registry); } }
@RestController @RequestMapping(value = "/api/user") public class LoginController { @Autowired private UserService userService; @Autowired private StringRedisTemplate redisTemplate; @RequestMapping("/login") public ReturnData login(HttpServletRequest request, String account, String password) { User user = userService.findUserByAccountAndPassword(account, password); if (user != null) { HttpSession session = request.getSession(); session.setAttribute("loginUserId", user.getUserId()); redisTemplate.opsForValue().set("loginUser:" + user.getUserId(), session.getId()); return new ReturnData(StatusCode.REQUEST_SUCCESS, user, "登錄成功!"); } else { throw new MyException(StatusCode.ACCOUNT_OR_PASSWORD_ERROR, "賬戶名或密碼錯誤!"); } } @RequestMapping(value = "/getUserInfo") public ReturnData get(long userId) { User user = userService.findUserByUserId(userId); if (user != null) { return new ReturnData(StatusCode.REQUEST_SUCCESS, user, "查詢成功!"); } else { throw new MyException(StatusCode.USER_NOT_EXIST, "用戶不存在!"); } } }
我在瀏覽器上登錄,然后獲取用戶信息,再在postman上登錄相同的賬號,瀏覽器再獲取用戶信息,就會提示401錯誤了,瀏覽器需要重新登錄才能獲取得到用戶信息,同樣,postman上登錄的賬號就失效了。
瀏覽器:
postman:
分布式session需要解決兩個難點:1、正確配置redis讓springboot把session托管到redis服務器。2、唯一登錄。
redis需要能正確啟動到出現如下效果才證明redis正常配置并啟動
同時還要保證配置正確
@EnableCaching @EnableRedisHttpSession(maxInactiveIntervalInSeconds = 30)//session過期時間(秒) @Configuration public class RedisSessionConfig { @Bean public static ConfigureRedisAction configureRedisAction() { //讓springSession不再執行config命令 return ConfigureRedisAction.NO_OP; } }
springboot啟動后能在redis上查到緩存的session才能說明整個redis+springboot配置成功!
1、用戶登錄時,在redis中記錄該userId對應的sessionId,并將userId保存到session中。
HttpSession session = request.getSession(); session.setAttribute("loginUserId", user.getUserId()); redisTemplate.opsForValue().set("loginUser:" + user.getUserId(), session.getId());
2、訪問接口時,會在RedisSessionInterceptor攔截器中的preHandle()中捕獲,然后根據該請求發起者的session中保存的userId去redis查當前已登錄的sessionId,若查到的sessionId與訪問者的sessionId相等,那么說明請求合法,放行。否則拋出401異常給全局異常捕獲器去返回給客戶端401狀態。
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