SpringBoot+SpringSession+Redis实现session共享及唯一登录示例
最近在学习springboot,session这个点一直困扰了我好久,今天把这些天踩的坑分享出来吧,希望能帮助更多的人。
一、pom.xml配置<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>二、application.properties的redis配置
#redisspring.redis.host=127.0.0.1spring.redis.port=6379spring.redis.password=123456spring.redis.pool.max-idle=8spring.redis.pool.min-idle=0spring.redis.pool.max-active=8spring.redis.pool.max-wait=-1#超时一定要大于0spring.redis.timeout=3000spring.session.store-type=redis
在配置redis时需要确保redis安装正确,并且配置notify-keyspace-events Egx,spring.redis.timeout设置为大于0,我当时这里配置为0时springboot时启不起来。
三、编写登录状态拦截器RedisSessionInterceptor//拦截登录失效的请求public class RedisSessionInterceptor implements HandlerInterceptor{ @Autowired private StringRedisTemplate redisTemplate; @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {//无论访问的地址是不是正确的,都进行登录验证,登录成功后的访问再进行分发,404的访问自然会进入到错误控制器中HttpSession session = request.getSession();if (session.getAttribute('loginUserId') != null){ try {//验证当前请求的session是否是已登录的sessionString 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, '', '用户未登录!')));}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 { }}四、配置拦截器
@Configurationpublic class WebSecurityConfig extends WebMvcConfigurerAdapter{ @Bean public RedisSessionInterceptor getSessionInterceptor() {return new RedisSessionInterceptor(); } @Override public void addInterceptors(InterceptorRegistry registry) {//所有已api开头的访问都要进入RedisSessionInterceptor拦截器进行登录验证,并排除login接口(全路径)。必须写成链式,分别设置的话会创建多个拦截器。//必须写成getSessionInterceptor(),否则SessionInterceptor中的@Autowired会无效registry.addInterceptor(getSessionInterceptor()).addPathPatterns('/api/**').excludePathPatterns('/api/user/login');super.addInterceptors(registry); }}五、登录控制器
@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, '登录成功!');}else{ throw new MyException(StatusCode.ACCOUNT_OR_PASSWORD_ERROR, '账户名或密码错误!');} } @RequestMapping(value = '/getUserInfo') public ReturnData get(long userId) {User user = userService.findUserByUserId(userId);if (user != null){ return new ReturnData(StatusCode.REQUEST_SUCCESS, user, '查询成功!');}else{ throw new MyException(StatusCode.USER_NOT_EXIST, '用户不存在!');} }}六、效果
我在浏览器上登录,然后获取用户信息,再在postman上登录相同的账号,浏览器再获取用户信息,就会提示401错误了,浏览器需要重新登录才能获取得到用户信息,同样,postman上登录的账号就失效了。
浏览器:
postman:
分布式session需要解决两个难点:1、正确配置redis让springboot把session托管到redis服务器。2、唯一登录。
1、redis:redis需要能正确启动到出现如下效果才证明redis正常配置并启动
同时还要保证配置正确
@EnableCaching@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 30)//session过期时间(秒)@Configurationpublic class RedisSessionConfig{ @Bean public static ConfigureRedisAction configureRedisAction() {//让springSession不再执行config命令return ConfigureRedisAction.NO_OP; }}
springboot启动后能在redis上查到缓存的session才能说明整个redis+springboot配置成功!
1、用户登录时,在redis中记录该userId对应的sessionId,并将userId保存到session中。
HttpSession session = request.getSession();session.setAttribute('loginUserId', user.getUserId());redisTemplate.opsForValue().set('loginUser:' + user.getUserId(), session.getId());
2、访问接口时,会在RedisSessionInterceptor拦截器中的preHandle()中捕获,然后根据该请求发起者的session中保存的userId去redis查当前已登录的sessionId,若查到的sessionId与访问者的sessionId相等,那么说明请求合法,放行。否则抛出401异常给全局异常捕获器去返回给客户端401状态。
唯一登录经过我的验证后满足需求,暂时没有出现问题,也希望大家能看看有没有问题,有的话给我点好的建议!
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