SpringBoot整合Redis

本实例应用redis做登录及状态检查

1. 添加pom依赖

   <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-data-redis</artifactId>
   </dependency>

2. application.properties配置

   #redis
   spring.redis.database=0
   spring.redis.host=111.111.111.111
   spring.redis.port=6379
   spring.redis.password=root@234
   #连接池最大连接数
   spring.redis.jedis.pool.max-active=8
   #连接池最大阻塞等待时间 默认 -1 表示没有限制
   spring.redis.jedis.pool.max-wait=-1ms
   #连接池最大空闲连接数
   spring.redis.jedis.pool.max-idle=8
   #连接池最小空闲连接数
   spring.redis.jedis.pool.min-idle=0

3. 使用redis

   • 登录/退出/请求状态监测

   /**
    * @author wsyjlly
    * @create 2019.06.29 - 12:52
    **/
   @RestController
   public class MainController {
       @Autowired
       private UserService userService;
   
       @Autowired
       RedisTemplate redisTemplate;
       @Autowired
       StringRedisTemplate stringRedisTemplate;
       /**
       *  登录信息缓存时长
       * */
       public static final long EXPIRATION_TIME =  10 * 60;
   
       @PostMapping("/status")
       public ModelMap isLogin(HttpServletRequest request, HttpServletResponse response){
           ModelMap map = new ModelMap();
           String authorization = request.getHeader("authorization");
           if (authorization == ""||authorization == null){
               response.setStatus(345);
               return map.addAttribute("status",false);
           }
           String isLogin = stringRedisTemplate.opsForValue().get(authorization);
           if (null==isLogin){
               response.setStatus(345);
               return map.addAttribute("status",false);
           }
           return map.addAttribute("status",true).addAttribute("sa",isLogin);
       }
   
       @PostMapping("/login")
       public ModelMap login(String username,String password){
           ValueOperations<String, String> ops = stringRedisTemplate.opsForValue();
           User user = userService.getUser(username, password);
           if (user!=null) {
               String token = DigestUtils.sha1DigestAsHex(username + StringUtil.getRandomString(10) + password);
               if (user.getRole().equals("SuperAdmin")){
                   ops.set(token, "true", EXPIRATION_TIME, TimeUnit.SECONDS);
               }else {
                   ops.set(token, "false", EXPIRATION_TIME, TimeUnit.SECONDS);
               }
               return new ModelMap().addAttribute("token",token)
                       .addAttribute("result",true)
                       .addAttribute("role",user.getRole());
           }
           return new ModelMap().addAttribute("result",false);
       }
   
   
   
       @PostMapping("/logout")
       public ModelMap logout(HttpServletRequest request){
           ValueOperations<String, String> ops = stringRedisTemplate.opsForValue();
           System.out.println(request.getHeader("authorization"));
           Boolean result = ops.getOperations().delete(request.getHeader("authorization"));
           System.out.println(result);
           if (result) return new ModelMap().addAttribute("result",true).addAttribute("tip","退出成功！");
           return new ModelMap().addAttribute("result",false).addAttribute("tip","退出失败！");
       }
   }

   • 拦截器拦截请求并检查状态

   /**
    * @author wsyjlly
    * @create 2019.06.13 - 16:52
    **/
   @Controller
   public class MainInterceptor implements HandlerInterceptor {
       @Autowired
       StringRedisTemplate stringRedisTemplate;
       private Logger logger = LoggerFactory.getLogger(getClass());
       @Override
       public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
           logger.debug("MainInterceptor...拦截..."+request.getRequestURI());
   
           String authorization = request.getHeader("authorization");
           if (authorization == ""||authorization == null){
               response.setStatus(345);
               return false;
           }
           Boolean isLogin = stringRedisTemplate.hasKey(authorization);
           if (!isLogin){
               response.setStatus(345);
               return false;
           }
           logger.debug("key是否存在："+stringRedisTemplate.hasKey(authorization));
           logger.debug("key过期时间："+stringRedisTemplate.getExpire(authorization));
           stringRedisTemplate.expire(authorization, MainController.EXPIRATION_TIME, TimeUnit.SECONDS);
           return true;
       }
   
       @Override
       public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
           logger.debug("MainInterceptor...postHandle");
       }
   
       @Override
       public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
           logger.debug("MainInterceptor...afterCompletion");
   }
   }