用户退出功能实现

用户退出将Redis的token自动添加到黑名单

src/main/java/com/bao/dating/controller/UserController.java

@@ -9,10 +9,13 @@ import com.bao.dating.pojo.dto.UserLoginDTO;
 import com.bao.dating.pojo.vo.UserInfoVO;
 import com.bao.dating.pojo.vo.UserLoginVO;
 import com.bao.dating.service.UserService;
+import io.jsonwebtoken.Jwt;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
 
+import javax.servlet.http.HttpServletRequest;
+
 /**
  * 用户接口
  *
@@ -35,6 +38,17 @@ public class UserController {
         return Result.success(ResultCode.SUCCESS, "登录成功", userloginVO);
     }
 
+    /**
+     * 退出登录
+     * 从请求头中获取token并将其加入黑名单
+     */
+    @PostMapping("/logout")
+    public Result<Void> logout(HttpServletRequest request) {
+        String token = request.getHeader("token");
+        userService.logout(token);
+        return Result.success(ResultCode.SUCCESS,"退出登录成功",null);
+    }
+
     /**
      * 获取用户信息
      * @return 用户信息

src/main/java/com/bao/dating/interceptor/TokenInterceptor.java

@@ -56,6 +56,16 @@ public class TokenInterceptor implements HandlerInterceptor {
                 response.getWriter().write("Token无效或已过期");
                 return false;
             }
+
+            // 检查 token 是否在黑名单中
+            Object blacklistToken = redisTemplate.opsForValue().get("jwt:blacklist:" + token);
+            if (blacklistToken != null) {
+                log.error("Token已在黑名单中");
+                response.setStatus(401);
+                response.setContentType("application/json;charset=UTF-8");
+                response.getWriter().write("登录已失效, 请重新登录");
+                return false;
+            }
             
             // 解析 token
             String userId = JwtUtil.getSubjectFromToken(token);

src/main/java/com/bao/dating/service/UserService.java

@@ -18,6 +18,13 @@ public interface UserService {
      */
     UserLoginVO userLogin(UserLoginDTO userLoginDTO);
 
+    /**
+     * 退出登录
+     * @param token 登录凭证
+     * @return 注册结果
+     */
+    void logout(String token);
+
     /**
      * 查询个人信息
      * @param userId 动态ID

src/main/java/com/bao/dating/service/impl/UserServiceImpl.java

@@ -17,6 +17,7 @@ import com.bao.dating.service.UserService;
 import com.bao.dating.util.FileUtil;
 import com.bao.dating.util.JwtUtil;
 import com.bao.dating.util.MD5Util;
+import io.jsonwebtoken.Claims;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.redis.core.RedisTemplate;
@@ -25,10 +26,7 @@ import org.springframework.web.multipart.MultipartFile;
 
 
 import java.time.LocalDateTime;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.UUID;
+import java.util.*;
 import java.util.concurrent.TimeUnit;
 
 /**
@@ -99,6 +97,29 @@ public class UserServiceImpl implements UserService {
         return userLoginVO;
     }
 
+    /**
+     * 退出登录
+     * @param token 登录凭证
+     */
+    @Override
+    public void logout(String token) {
+        Claims claims = JwtUtil.getClaimsFromToken(token);
+        Date expiration = claims.getExpiration();
+        // 判断 token 是否已过期
+        long ttl = expiration.getTime() - System.currentTimeMillis();
+        // 如果 token 已过期，则不用处理
+        if (ttl <= 0) {
+            return;
+        }
+
+        String logoutKey = "jwt:blacklist:" + token;
+        redisTemplate.opsForValue().set(
+                logoutKey,
+                "logout",
+                ttl,
+                TimeUnit.MILLISECONDS);
+    }
+
     /**
      * 获取用户信息
      *