diff --git a/pom.xml b/pom.xml
index f807715..4349ba1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -79,6 +79,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-jpa</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-mongodb</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-security</artifactId>
diff --git a/src/main/java/com/onekeycall/videotablet/controller/ApkInfoController.java b/src/main/java/com/onekeycall/videotablet/controller/ApkInfoController.java
new file mode 100644
index 0000000..e562aab
--- /dev/null
+++ b/src/main/java/com/onekeycall/videotablet/controller/ApkInfoController.java
@@ -0,0 +1,37 @@
+package com.onekeycall.videotablet.controller;
+
+
+import com.onekeycall.videotablet.entity.ApkInfo;
+import com.onekeycall.videotablet.service.ApkInfoService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/apks")
+public class ApkInfoController {
+
+    @Autowired
+    private ApkInfoService apkInfoService;
+
+    @GetMapping("/device/{deviceId}")
+    public List<ApkInfo> getApksByDeviceId(@PathVariable String deviceId) {
+        return apkInfoService.getApkInfosByDeviceId(deviceId);
+    }
+
+    @PostMapping
+    public ApkInfo saveApkInfo(@RequestBody ApkInfo apkInfo) {
+        return apkInfoService.saveOrUpdateApkInfo(apkInfo);
+    }
+
+    @PostMapping("/batch")
+    public List<ApkInfo> saveApkInfos(@RequestBody List<ApkInfo> apkInfos) {
+        return apkInfoService.saveAllApkInfos(apkInfos);
+    }
+
+    @DeleteMapping("/{packageName}")
+    public void deleteApkInfo(@PathVariable String packageName) {
+        apkInfoService.deleteApkInfoByPackageName(packageName);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/onekeycall/videotablet/controller/LoginController.java b/src/main/java/com/onekeycall/videotablet/controller/LoginController.java
index 5fdcf9d..a18d4dd 100644
--- a/src/main/java/com/onekeycall/videotablet/controller/LoginController.java
+++ b/src/main/java/com/onekeycall/videotablet/controller/LoginController.java
@@ -91,7 +91,7 @@ public class LoginController {
             return Result.ok().data(Collections.singletonMap("token", tokenPair.toMap()));
         } catch (Exception e) {
             e.printStackTrace();
-            return Result.error().message("登录失败");
+            return Result.error().message("登录失败:密码错误");
         }
     }
 
diff --git a/src/main/java/com/onekeycall/videotablet/entity/ApkInfo.java b/src/main/java/com/onekeycall/videotablet/entity/ApkInfo.java
new file mode 100644
index 0000000..ff1db54
--- /dev/null
+++ b/src/main/java/com/onekeycall/videotablet/entity/ApkInfo.java
@@ -0,0 +1,43 @@
+package com.onekeycall.videotablet.entity;
+
+import lombok.Data;
+import org.springframework.data.mongodb.core.index.Indexed;
+import org.springframework.data.mongodb.core.mapping.Document;
+import org.springframework.data.mongodb.core.mapping.Field;
+import org.springframework.data.annotation.Id;
+
+import java.util.Date;
+
+@Data
+@Document(collection = "apk_info") // 指定集合名
+public class ApkInfo {
+    @Id // 标识主键
+    private String id; // MongoDB默认使用ObjectId，这里用String接收
+
+    @Field("package_name") // 可指定字段在数据库中的名称
+    private String packageName;
+
+    @Field("app_name")
+    private String appName;
+
+    @Field("version_name")
+    private String versionName;
+
+    @Field("version_code")
+    private Integer versionCode;
+
+    @Field("install_time")
+    private Date installTime; // MongoDB支持Date类型[9,11](@ref)
+
+    @Field("last_update_time")
+    private Date lastUpdateTime;
+
+    private Long size; // APK大小，单位可以是字节
+
+    // 建议增加一个字段标识该列表所属的设备或用户
+    @Indexed // 为设备ID创建索引
+    @Field("device_sn")
+    private String deviceSn;
+
+
+}
diff --git a/src/main/java/com/onekeycall/videotablet/repository/ApkInfoRepository.java b/src/main/java/com/onekeycall/videotablet/repository/ApkInfoRepository.java
new file mode 100644
index 0000000..b107b26
--- /dev/null
+++ b/src/main/java/com/onekeycall/videotablet/repository/ApkInfoRepository.java
@@ -0,0 +1,28 @@
+package com.onekeycall.videotablet.repository;
+
+import com.onekeycall.videotablet.entity.ApkInfo;
+import org.springframework.data.mongodb.repository.MongoRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.Date;
+import java.util.List;
+
+@Repository
+public interface ApkInfoRepository extends MongoRepository<ApkInfo, String> {
+    // MongoRepository<ApkInfo, String> 中String是主键类型
+
+    // 根据包名查找应用
+    ApkInfo findByPackageName(String packageName);
+
+    // 根据设备ID查找该设备的所有应用
+    List<ApkInfo> findByDeviceSn(String deviceSn);
+
+    // 查找安装时间在某个时间点之后的应用
+    List<ApkInfo> findByInstallTimeAfter(Date date);
+
+    // 自定义查询：查找应用名称包含特定字符串的应用
+    List<ApkInfo> findByAppNameLike(String appName);
+
+    // 你可以根据业务需求定义更多查询方法
+    // Spring Data MongoDB会根据方法名自动推导查询[2](@ref)
+}
diff --git a/src/main/java/com/onekeycall/videotablet/service/ApkInfoService.java b/src/main/java/com/onekeycall/videotablet/service/ApkInfoService.java
new file mode 100644
index 0000000..d81ffbd
--- /dev/null
+++ b/src/main/java/com/onekeycall/videotablet/service/ApkInfoService.java
@@ -0,0 +1,74 @@
+package com.onekeycall.videotablet.service;
+
+import com.onekeycall.videotablet.entity.ApkInfo;
+import com.onekeycall.videotablet.repository.ApkInfoRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.Sort;
+import org.springframework.data.mongodb.core.MongoTemplate;
+import org.springframework.data.mongodb.core.query.Criteria;
+import org.springframework.data.mongodb.core.query.Query;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class ApkInfoService {
+
+    @Autowired
+    private ApkInfoRepository apkInfoRepository;
+
+    @Autowired
+    private MongoTemplate mongoTemplate;
+
+    /**
+     * 保存或更新APK信息（如果ID存在则更新，不存在则新增）
+     */
+    public ApkInfo saveOrUpdateApkInfo(ApkInfo apkInfo) {
+        return apkInfoRepository.save(apkInfo);
+    }
+
+    /**
+     * 批量保存APK列表（例如从一台设备同步所有应用）
+     */
+    public List<ApkInfo> saveAllApkInfos(List<ApkInfo> apkInfos) {
+        return apkInfoRepository.saveAll(apkInfos);
+    }
+
+    /**
+     * 根据ID查询APK信息
+     */
+    public ApkInfo getApkInfoById(String id) {
+        return apkInfoRepository.findById(id).orElse(null);
+    }
+
+    /**
+     * 根据设备ID查询该设备上的所有应用
+     */
+    public List<ApkInfo> getApkInfosByDeviceId(String deviceSn) {
+        return apkInfoRepository.findByDeviceSn(deviceSn);
+    }
+
+    /**
+     * 根据包名删除应用信息
+     */
+    public void deleteApkInfoByPackageName(String packageName) {
+        ApkInfo apkInfo = apkInfoRepository.findByPackageName(packageName);
+        if (apkInfo != null) {
+            apkInfoRepository.delete(apkInfo);
+        }
+    }
+
+    /**
+     * 获取所有APK信息
+     */
+    public List<ApkInfo> getAllApkInfos() {
+        return apkInfoRepository.findAll();
+    }
+
+    public List<ApkInfo> findTop5ByDeviceIdOrderBySizeDesc(String deviceSn) {
+        Query query = Query.query(Criteria.where("device_Sn").is(deviceSn))
+                .with(Sort.by(Sort.Direction.DESC, "size"))
+                .limit(5);
+        return mongoTemplate.find(query, ApkInfo.class);
+    }
+}
\ No newline at end of file
diff --git a/src/main/resources/application-debug.properties b/src/main/resources/application-debug.properties
index 24eea01..0847148 100644
--- a/src/main/resources/application-debug.properties
+++ b/src/main/resources/application-debug.properties
@@ -22,6 +22,9 @@ spring.data.redis.lettuce.pool.max-active=8
 spring.data.redis.lettuce.pool.max-wait=1ms
 spring.data.redis.lettuce.shutdown-timeout=100ms
 
+#MongoDB
+spring.data.mongodb.uri=mongodb://fht:fanhuitong@139.199.77.221:27027/apk_installation_records
+
 # Hibernate配置
 #spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MariaDBDialect
 spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect