From e17001601933d0cc7a72f7537341090a53e136ea Mon Sep 17 00:00:00 2001
From: KilLze <kirito24177@163.com>
Date: Wed, 14 Jan 2026 11:21:06 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AE=8C=E6=88=90=E7=94=A8=E6=88=B7=E5=9C=A8?=
 =?UTF-8?q?=E7=BA=BF=E7=8A=B6=E6=80=81=E6=9F=A5=E8=AF=A2?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../bao/dating/controller/UserController.java | 11 +++++++++++
 .../com/bao/dating/service/UserService.java   |  7 +++++++
 .../dating/service/impl/UserServiceImpl.java  | 19 +++++++++++++++++++
 3 files changed, 37 insertions(+)

diff --git a/src/main/java/com/bao/dating/controller/UserController.java b/src/main/java/com/bao/dating/controller/UserController.java
index 13b709a..a85a762 100644
--- a/src/main/java/com/bao/dating/controller/UserController.java
+++ b/src/main/java/com/bao/dating/controller/UserController.java
@@ -203,4 +203,15 @@ public class UserController {
         return Result.success(ResultCode.SUCCESS,"用户登录成功",userLoginVO);
     }
 
+    /**
+     * 判断用户是否在线
+     * @param userId 用户ID
+     * @return 用户是否在线
+     */
+    @GetMapping("/{userId}/online")
+    public Result<Boolean> isUserOnline(@PathVariable Long userId) {
+
+        boolean online = userService.isUserOnline(userId);
+        return Result.success(ResultCode.SUCCESS, "查询成功", online);
+    }
 }
diff --git a/src/main/java/com/bao/dating/service/UserService.java b/src/main/java/com/bao/dating/service/UserService.java
index 3e3fed1..ab23da1 100644
--- a/src/main/java/com/bao/dating/service/UserService.java
+++ b/src/main/java/com/bao/dating/service/UserService.java
@@ -92,4 +92,11 @@ public interface UserService {
      * @return 用户列表
      */
     List<UserInfoVO> findNearbyUsers(double lat,double lng,double  radiusKm);
+
+    /**
+     * 判断用户是否在线
+     * @param userId 用户ID
+     * @return 是否在线
+     */
+    boolean isUserOnline(Long userId);
 }
diff --git a/src/main/java/com/bao/dating/service/impl/UserServiceImpl.java b/src/main/java/com/bao/dating/service/impl/UserServiceImpl.java
index 733e8ab..d17c298 100644
--- a/src/main/java/com/bao/dating/service/impl/UserServiceImpl.java
+++ b/src/main/java/com/bao/dating/service/impl/UserServiceImpl.java
@@ -491,4 +491,23 @@ public class UserServiceImpl implements UserService {
         }
         return result;
     }
+
+    @Override
+    public boolean isUserOnline(Long userId) {
+        if (userId == null) {
+            return false;
+        }
+
+        // 1. 是否被封禁
+        String banKey = "user:ban:" + userId;
+        if (Boolean.TRUE.equals(redisTemplate.hasKey(banKey))) {
+            return false;
+        }
+
+        // 2. 是否存在登录 token
+        String tokenKey = "login:token:" + userId;
+        Boolean online = redisTemplate.hasKey(tokenKey);
+
+        return Boolean.TRUE.equals(online);
+    }
 }
\ No newline at end of file