diff --git a/aioj-backend-common/aioj-backend-common-core/src/main/java/cn/meowrain/aioj/backend/framework/core/enums/DelStatusEnum.java b/aioj-backend-common/aioj-backend-common-core/src/main/java/cn/meowrain/aioj/backend/framework/core/enums/DelStatusEnum.java
index 4d8afe3..7fcd246 100644
--- a/aioj-backend-common/aioj-backend-common-core/src/main/java/cn/meowrain/aioj/backend/framework/core/enums/DelStatusEnum.java
+++ b/aioj-backend-common/aioj-backend-common-core/src/main/java/cn/meowrain/aioj/backend/framework/core/enums/DelStatusEnum.java
@@ -5,15 +5,15 @@ package cn.meowrain.aioj.backend.framework.core.enums;
  */
 public enum DelStatusEnum {
 
-	STATUS_NORMAL("0"), STATUS_DELETE("1");
+	STATUS_NORMAL(0), STATUS_DELETE(1);
 
-	private final String code;
+	private final Integer code;
 
-	DelStatusEnum(String code) {
+	DelStatusEnum(Integer code) {
 		this.code = code;
 	}
 
-	public String code() {
+	public Integer code() {
 		return this.code;
 	}
 
diff --git a/aioj-backend-file-service/pom.xml b/aioj-backend-file-service/pom.xml
index 9f0b477..74d98fd 100644
--- a/aioj-backend-file-service/pom.xml
+++ b/aioj-backend-file-service/pom.xml
@@ -81,5 +81,13 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>cn.hutool</groupId>
+            <artifactId>hutool-crypto</artifactId>
+        </dependency>
     </dependencies>
 </project>
\ No newline at end of file
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/FileServiceApplication.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/FileServiceApplication.java
index 9033663..52d42c4 100644
--- a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/FileServiceApplication.java
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/FileServiceApplication.java
@@ -1,9 +1,13 @@
 package cn.meowrain.aioj.backend.fileservice;
 
+import org.mybatis.spring.annotation.MapperScan;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
 
 @SpringBootApplication
+@EnableConfigurationProperties
+@MapperScan("cn.meowrain.aioj.backend.fileservice.dao.mapper")
 public class FileServiceApplication {
     public static void main(String[] args) {
         SpringApplication.run(FileServiceApplication.class);
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/AsyncConfig.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/AsyncConfig.java
new file mode 100644
index 0000000..323b437
--- /dev/null
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/AsyncConfig.java
@@ -0,0 +1,49 @@
+package cn.meowrain.aioj.backend.fileservice.config;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.ThreadPoolExecutor;
+
+/**
+ * 异步配置类
+ *
+ * @author meowrain
+ * @since 2026-01-10
+ */
+@Slf4j
+@Configuration
+@EnableAsync
+public class AsyncConfig {
+
+    @Value("${file-config.async.core-pool-size:2}")
+    private int corePoolSize;
+
+    @Value("${file-config.async.max-pool-size:5}")
+    private int maxPoolSize;
+
+    @Value("${file-config.async.queue-capacity:100}")
+    private int queueCapacity;
+
+    @Value("${file-config.async.thread-name-prefix:file-async-}")
+    private String threadNamePrefix;
+
+    @Bean("fileExecutor")
+    public Executor fileExecutor() {
+        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+        executor.setCorePoolSize(corePoolSize);
+        executor.setMaxPoolSize(maxPoolSize);
+        executor.setQueueCapacity(queueCapacity);
+        executor.setThreadNamePrefix(threadNamePrefix);
+        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
+        executor.initialize();
+        log.info("文件异步线程池初始化完成: coreSize={}, maxSize={}, queueCapacity={}",
+                corePoolSize, maxPoolSize, queueCapacity);
+        return executor;
+    }
+}
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/FileConfigurationProperties.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/FileConfigurationProperties.java
new file mode 100644
index 0000000..d37b4d7
--- /dev/null
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/FileConfigurationProperties.java
@@ -0,0 +1,94 @@
+package cn.meowrain.aioj.backend.fileservice.config;
+
+import lombok.Data;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+/**
+ * 文件存储配置属性
+ *
+ * @author meowrain
+ * @since 2026-01-10
+ */
+@Component
+@Data
+@ConfigurationProperties(prefix = FileConfigurationProperties.PREFIX)
+public class FileConfigurationProperties {
+    static final String PREFIX = "file-config";
+
+    /**
+     * 是否使用云存储
+     */
+    private boolean useCloud = false;
+
+    /**
+     * 本地存储配置
+     */
+    private Local local = new Local();
+
+    /**
+     * 腾讯云COS存储配置
+     */
+    private Cos cos = new Cos();
+
+    @Data
+    public static class Local {
+        /**
+         * 本地存储基础路径
+         */
+        private String basePath = "uploads";
+
+        /**
+         * 访问域名
+         */
+        private String domain = "http://localhost:10013/api";
+
+        /**
+         * URL前缀
+         */
+        private String urlPrefix = "/file";
+    }
+
+    @Data
+    public static class Cos {
+        /**
+         * 是否启用COS
+         */
+        private boolean enabled = false;
+
+        /**
+         * 腾讯云SecretId
+         */
+        private String secretId;
+
+        /**
+         * 腾讯云SecretKey
+         */
+        private String secretKey;
+
+        /**
+         * 区域，如ap-guangzhou、ap-beijing等
+         */
+        private String region;
+
+        /**
+         * 存储桶名称
+         */
+        private String bucketName;
+
+        /**
+         * 访问域名（可选，如果配置则使用该域名生成访问URL）
+         */
+        private String domain;
+
+        /**
+         * 文件前缀
+         */
+        private String prefix = "";
+
+        /**
+         * 预签名URL过期时间（秒）
+         */
+        private Integer presignedUrlExpireSeconds = 3600;
+    }
+}
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/FileStorageConfig.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/FileStorageConfig.java
new file mode 100644
index 0000000..e232cf5
--- /dev/null
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/FileStorageConfig.java
@@ -0,0 +1,51 @@
+package cn.meowrain.aioj.backend.fileservice.config;
+
+import cn.meowrain.aioj.backend.fileservice.storage.FileStorageStrategy;
+import cn.meowrain.aioj.backend.fileservice.storage.impl.CosFileStorageStrategy;
+import cn.meowrain.aioj.backend.fileservice.storage.impl.LocalFileStorageStrategy;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+
+/**
+ * 文件存储配置类
+ * 根据配置自动选择存储策略
+ *
+ * @author meowrain
+ * @since 2026-01-10
+ */
+@Slf4j
+@Configuration
+@RequiredArgsConstructor
+public class FileStorageConfig {
+
+    private final LocalFileStorageStrategy localFileStorageStrategy;
+    private final FileConfigurationProperties fileConfigurationProperties;
+    private final ApplicationContext applicationContext;
+
+    /**
+     * 配置文件存储策略
+     * 优先使用腾讯云COS，如果未启用则使用本地存储
+     */
+    @Bean
+    @Primary
+    public FileStorageStrategy fileStorageStrategy() {
+        if (fileConfigurationProperties.isUseCloud()) {
+            try {
+                CosFileStorageStrategy cosStrategy = applicationContext.getBean(CosFileStorageStrategy.class);
+                log.info("使用腾讯云COS文件存储策略");
+                return cosStrategy;
+            } catch (Exception e) {
+                log.warn("腾讯云COS未配置，回退到本地文件存储策略");
+                return localFileStorageStrategy;
+            }
+        } else {
+            log.info("使用本地文件存储策略");
+            return localFileStorageStrategy;
+        }
+    }
+}
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/SwaggerConfiguration.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/SwaggerConfiguration.java
new file mode 100644
index 0000000..b21d34a
--- /dev/null
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/config/SwaggerConfiguration.java
@@ -0,0 +1,45 @@
+package cn.meowrain.aioj.backend.fileservice.config;
+
+import com.github.xiaoymin.knife4j.spring.annotations.EnableKnife4j;
+import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.oas.models.info.Contact;
+import io.swagger.v3.oas.models.info.Info;
+import io.swagger.v3.oas.models.info.License;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.ApplicationArguments;
+import org.springframework.boot.ApplicationRunner;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Swagger配置类
+ *
+ * @author meowrain
+ * @since 2026-01-10
+ */
+@Slf4j
+@Configuration
+@EnableKnife4j
+public class SwaggerConfiguration implements ApplicationRunner {
+
+    @Value("${server.port:8080}")
+    private String serverPort;
+
+    @Value("${server.servlet.context-path:}")
+    private String contextPath;
+
+    @Bean
+    public OpenAPI customerOpenAPI() {
+        return new OpenAPI().info(new Info().title("AIOJ-文件服务✨")
+                .description("文件上传、下载、存储管理等功能")
+                .version("v1.0.0")
+                .contact(new Contact().name("meowrain").email("meowrain@126.com"))
+                .license(new License().name("MeowRain").url("https://meowrain.cn")));
+    }
+
+    @Override
+    public void run(ApplicationArguments args) throws Exception {
+        log.info("✨API Document: http://127.0.0.1:{}{}/doc.html", serverPort, contextPath);
+    }
+}
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/controller/AttachmentController.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/controller/AttachmentController.java
index 2291a9c..a6ee585 100644
--- a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/controller/AttachmentController.java
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/controller/AttachmentController.java
@@ -9,6 +9,7 @@ import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
 
 import java.util.List;
 
@@ -21,11 +22,16 @@ import java.util.List;
  * @since 2026-01-10
  */
 @RestController
-@RequestMapping("/v1/attachment")
+@RequestMapping("/v1/file")
 @RequiredArgsConstructor
 public class AttachmentController {
 
     private final AttachmentService attachmentService;
+    @Operation(summary = "通用文件上传组件")
+    @PostMapping("/upload")
+    public Result<AttachmentDO> uploadFile(@RequestParam("file")MultipartFile file) {
+        return Results.success(attachmentService.upload(file));
+    }
 
     /**
      * 分页查询通用附件表列表
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/controller/FileAccessController.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/controller/FileAccessController.java
new file mode 100644
index 0000000..a06c8cc
--- /dev/null
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/controller/FileAccessController.java
@@ -0,0 +1,83 @@
+package cn.meowrain.aioj.backend.fileservice.controller;
+
+import cn.hutool.core.util.StrUtil;
+import io.swagger.v3.oas.annotations.Operation;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+/**
+ * 本地文件访问控制器
+ *
+ * @author meowrain
+ * @since 2026-01-10
+ */
+@Slf4j
+@RestController
+@ConditionalOnProperty(prefix = "file-config", name = "use-cloud", havingValue = "false", matchIfMissing = true)
+public class FileAccessController {
+
+    @Value("${file-config.local.base-path:uploads}")
+    private String basePath;
+
+    @Value("${file-config.local.domain:http://localhost:10013}")
+    private String domain;
+
+    @Value("${server.servlet.context-path:}")
+    private String contextPath;
+
+    @GetMapping("/file/**")
+    @Operation(summary = "访问本地文件")
+    public void accessFile(HttpServletRequest request, HttpServletResponse response) throws IOException {
+        String requestURI = request.getRequestURI();
+        // 去除 context-path 和 /file 前缀，获取相对路径
+        String prefix = contextPath + "/file";
+        String filePath = requestURI.substring(prefix.length());
+
+        // 移除开头的斜杠（如果有）
+        if (filePath.startsWith("/")) {
+            filePath = filePath.substring(1);
+        }
+
+        if (StrUtil.isBlank(filePath)) {
+            response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
+            return;
+        }
+
+        // 使用 Paths.get 自动处理路径分隔符
+        Path targetPath = Paths.get(basePath, filePath).normalize();
+
+        // 安全检查：防止路径遍历攻击
+        if (!targetPath.startsWith(Paths.get(basePath).normalize())) {
+            response.setStatus(HttpServletResponse.SC_FORBIDDEN);
+            return;
+        }
+
+        if (!Files.exists(targetPath)) {
+            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
+            return;
+        }
+
+        String contentType = Files.probeContentType(targetPath);
+        if (StrUtil.isBlank(contentType)) {
+            contentType = MediaType.APPLICATION_OCTET_STREAM_VALUE;
+        }
+
+        response.setContentType(contentType);
+        response.setHeader(HttpHeaders.CONTENT_DISPOSITION,
+                "inline; filename=\"" + targetPath.getFileName().toString() + "\"");
+
+        Files.copy(targetPath, response.getOutputStream());
+    }
+}
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/dao/entity/AttachmentDO.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/dao/entity/AttachmentDO.java
index 720ad19..751ee70 100644
--- a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/dao/entity/AttachmentDO.java
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/dao/entity/AttachmentDO.java
@@ -103,7 +103,7 @@ public class AttachmentDO implements Serializable {
      * 逻辑删除(0-正常, 1-已删除)
      */
     @TableField("is_deleted")
-    private Byte isDeleted;
+    private Integer isDeleted;
 
     /**
      * 创建时间
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/dao/mapper/AttachmentMapper.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/dao/mapper/AttachmentMapper.java
index 4926d09..b0a6a97 100644
--- a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/dao/mapper/AttachmentMapper.java
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/dao/mapper/AttachmentMapper.java
@@ -2,6 +2,7 @@ package cn.meowrain.aioj.backend.fileservice.dao.mapper;
 
 import cn.meowrain.aioj.backend.fileservice.dao.entity.AttachmentDO;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import org.apache.ibatis.annotations.Mapper;
 
 /**
  * <p>
@@ -11,6 +12,7 @@ import com.baomidou.mybatisplus.core.mapper.BaseMapper;
  * @author meowrain
  * @since 2026-01-10
  */
+@Mapper
 public interface AttachmentMapper extends BaseMapper<AttachmentDO> {
 
 }
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/service/AttachmentService.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/service/AttachmentService.java
index e7f62b1..e279df8 100644
--- a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/service/AttachmentService.java
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/service/AttachmentService.java
@@ -2,6 +2,7 @@ package cn.meowrain.aioj.backend.fileservice.service;
 
 import cn.meowrain.aioj.backend.fileservice.dao.entity.AttachmentDO;
 import com.baomidou.mybatisplus.extension.service.IService;
+import org.springframework.web.multipart.MultipartFile;
 
 /**
  * <p>
@@ -13,4 +14,6 @@ import com.baomidou.mybatisplus.extension.service.IService;
  */
 public interface AttachmentService extends IService<AttachmentDO> {
 
+
+    AttachmentDO upload(MultipartFile file);
 }
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/service/HashCalculationService.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/service/HashCalculationService.java
new file mode 100644
index 0000000..ac25370
--- /dev/null
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/service/HashCalculationService.java
@@ -0,0 +1,78 @@
+package cn.meowrain.aioj.backend.fileservice.service;
+
+import cn.hutool.crypto.digest.DigestUtil;
+import cn.meowrain.aioj.backend.fileservice.config.FileConfigurationProperties;
+import cn.meowrain.aioj.backend.fileservice.dao.entity.AttachmentDO;
+import cn.meowrain.aioj.backend.fileservice.dao.mapper.AttachmentMapper;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Propagation;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+
+/**
+ * 异步哈希计算服务
+ *
+ * @author meowrain
+ * @since 2026-01-10
+ */
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class HashCalculationService {
+
+    private final AttachmentMapper attachmentMapper;
+    private final FileConfigurationProperties fileConfigurationProperties;
+
+    /**
+     * 异步计算大文件哈希（只计算，不删除文件）
+     *
+     * @param attachmentId 新上传的附件ID
+     * @param storagePath  存储路径
+     * @param storageType  存储类型
+     */
+    @Async("fileExecutor")
+    @Transactional(propagation = Propagation.REQUIRES_NEW)
+    public void calculateHashAsync(Long attachmentId, String storagePath, String storageType) {
+        FileInputStream fis = null;
+        try {
+            log.info("开始异步计算大文件哈希: attachmentId={}, storagePath={}, storageType={}",
+                    attachmentId, storagePath, storageType);
+
+            String fileHash;
+            if ("LOCAL".equals(storageType)) {
+                String fullPath = fileConfigurationProperties.getLocal().getBasePath() + "/" + storagePath;
+                File file = new File(fullPath);
+                fis = new FileInputStream(file);
+                fileHash = DigestUtil.sha256Hex(fis);
+            } else {
+                log.warn("暂不支持云存储的异步哈希计算: storageType={}", storageType);
+                return;
+            }
+
+            // 只更新哈希值，不删除文件
+            AttachmentDO update = new AttachmentDO();
+            update.setId(attachmentId);
+            update.setFileHash(fileHash);
+            attachmentMapper.updateById(update);
+
+            log.info("大文件哈希计算完成: attachmentId={}, fileHash={}", attachmentId, fileHash);
+
+        } catch (IOException e) {
+            log.error("异步计算大文件哈希失败: attachmentId={}", attachmentId, e);
+        } finally {
+            if (fis != null) {
+                try {
+                    fis.close();
+                } catch (IOException e) {
+                    log.error("关闭文件流失败", e);
+                }
+            }
+        }
+    }
+}
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/service/impl/AttachmentServiceImpl.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/service/impl/AttachmentServiceImpl.java
index 6f4a557..37e86a1 100644
--- a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/service/impl/AttachmentServiceImpl.java
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/service/impl/AttachmentServiceImpl.java
@@ -1,10 +1,25 @@
 package cn.meowrain.aioj.backend.fileservice.service.impl;
 
+import cn.hutool.core.io.FileUtil;
+import cn.hutool.core.util.IdUtil;
+import cn.hutool.core.util.StrUtil;
+import cn.hutool.crypto.digest.DigestUtil;
 import cn.meowrain.aioj.backend.fileservice.dao.entity.AttachmentDO;
 import cn.meowrain.aioj.backend.fileservice.dao.mapper.AttachmentMapper;
 import cn.meowrain.aioj.backend.fileservice.service.AttachmentService;
+import cn.meowrain.aioj.backend.fileservice.service.HashCalculationService;
+import cn.meowrain.aioj.backend.fileservice.storage.FileStorageStrategy;
+import cn.meowrain.aioj.backend.framework.core.enums.DelStatusEnum;
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.time.LocalDateTime;
 
 /**
  * <p>
@@ -14,7 +29,99 @@ import org.springframework.stereotype.Service;
  * @author meowrain
  * @since 2026-01-10
  */
+@Slf4j
 @Service
+@RequiredArgsConstructor
 public class AttachmentServiceImpl extends ServiceImpl<AttachmentMapper, AttachmentDO> implements AttachmentService {
 
+    private final FileStorageStrategy fileStorageStrategy;
+    private final HashCalculationService hashCalculationService;
+
+    /**
+     * 是否启用文件去重
+     */
+    @Value("${file-config.deduplication-enabled:true}")
+    private boolean deduplicationEnabled;
+
+    /**
+     * 同步计算哈希的文件大小阈值（字节）
+     * 超过此大小异步计算，默认 10MB
+     */
+    @Value("${file-config.sync-hash-threshold:10485760}")
+    private long syncHashThreshold;
+
+    @Override
+    public AttachmentDO upload(MultipartFile file) {
+        try {
+            String originalFilename = file.getOriginalFilename();
+            String fileExtension = FileUtil.extName(originalFilename);
+            long fileSize = file.getSize();
+
+            // 判断文件大小，选择处理方式
+            boolean isSmallFile = fileSize <= syncHashThreshold;
+
+            if (deduplicationEnabled && isSmallFile) {
+                // ========== 小文件：同步计算哈希，立即去重 ==========
+                String fileHash = DigestUtil.sha256Hex(file.getInputStream());
+
+                AttachmentDO existingFile = getOne(new LambdaQueryWrapper<AttachmentDO>()
+                        .eq(AttachmentDO::getFileHash, fileHash)
+                        .eq(AttachmentDO::getIsDeleted, DelStatusEnum.STATUS_NORMAL.code())
+                        .last("LIMIT 1"));
+
+                if (existingFile != null) {
+                    log.info("小文件已存在，返回已有文件: fileName={}, fileHash={}, existingId={}",
+                            originalFilename, fileHash, existingFile.getId());
+                    return existingFile;
+                }
+
+                // 文件不存在，上传并保存哈希
+                return uploadAndSave(file, originalFilename, fileExtension, fileHash);
+            } else {
+                // ========== 大文件：直接上传，异步计算哈希 ==========
+                AttachmentDO attachmentDO = uploadAndSave(file, originalFilename, fileExtension, null);
+
+                // 异步计算哈希（只计算，不删除文件）
+                hashCalculationService.calculateHashAsync(attachmentDO.getId(), attachmentDO.getStoragePath(), attachmentDO.getStorageType());
+
+                return attachmentDO;
+            }
+
+        } catch (IOException e) {
+            log.error("文件上传失败: {}", file.getOriginalFilename(), e);
+            throw new RuntimeException("文件上传失败: " + e.getMessage(), e);
+        }
+    }
+
+    /**
+     * 上传文件并保存记录
+     */
+    private AttachmentDO uploadAndSave(MultipartFile file, String originalFilename,
+                                        String fileExtension, String fileHash) throws IOException {
+        String fileName = IdUtil.fastSimpleUUID() + StrUtil.DOT + fileExtension;
+        String datePath = LocalDateTime.now().toLocalDate().toString().replace("-", "/");
+        String relativePath = datePath + "/" + fileName;
+
+        String fileUrl = fileStorageStrategy.upload(file, relativePath);
+
+        AttachmentDO attachmentDO = new AttachmentDO();
+        attachmentDO.setId(IdUtil.getSnowflakeNextId());
+        attachmentDO.setFileName(originalFilename);
+        attachmentDO.setFileExtension(fileExtension);
+        attachmentDO.setFileSize(file.getSize());
+        attachmentDO.setFileHash(fileHash);
+        attachmentDO.setMimeType(file.getContentType());
+        attachmentDO.setStorageType(fileStorageStrategy.getStorageType());
+        attachmentDO.setStoragePath(relativePath);
+        attachmentDO.setCreatedAt(LocalDateTime.now());
+        attachmentDO.setUpdatedAt(LocalDateTime.now());
+        attachmentDO.setIsDeleted(DelStatusEnum.STATUS_NORMAL.code());
+
+        save(attachmentDO);
+        log.info("文件上传成功: fileName={}, storageType={}, storagePath={}, fileHash={}, size={}KB",
+                originalFilename, fileStorageStrategy.getStorageType(), relativePath,
+                fileHash, file.getSize() / 1024);
+
+        return attachmentDO;
+    }
 }
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/storage/FileStorageStrategy.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/storage/FileStorageStrategy.java
new file mode 100644
index 0000000..bc53ba4
--- /dev/null
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/storage/FileStorageStrategy.java
@@ -0,0 +1,68 @@
+package cn.meowrain.aioj.backend.fileservice.storage;
+
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * 文件存储策略接口
+ * 支持多种存储方式：本地存储、腾讯云COS、阿里云OSS等
+ *
+ * @author meowrain
+ * @since 2026-01-10
+ */
+public interface FileStorageStrategy {
+
+    /**
+     * 上传文件
+     *
+     * @param file     文件
+     * @param filePath 文件存储路径
+     * @return 文件访问URL
+     * @throws IOException 上传失败时抛出
+     */
+    String upload(MultipartFile file, String filePath) throws IOException;
+
+    /**
+     * 上传文件流
+     *
+     * @param inputStream 文件流
+     * @param filePath    文件存储路径
+     * @param fileSize    文件大小
+     * @return 文件访问URL
+     * @throws IOException 上传失败时抛出
+     */
+    String upload(InputStream inputStream, String filePath, long fileSize) throws IOException;
+
+    /**
+     * 删除文件
+     *
+     * @param filePath 文件存储路径
+     * @return 是否删除成功
+     */
+    boolean delete(String filePath);
+
+    /**
+     * 判断文件是否存在
+     *
+     * @param filePath 文件存储路径
+     * @return 是否存在
+     */
+    boolean exists(String filePath);
+
+    /**
+     * 获取文件访问URL
+     *
+     * @param filePath 文件存储路径
+     * @return 文件访问URL
+     */
+    String getFileUrl(String filePath);
+
+    /**
+     * 获取存储类型标识
+     *
+     * @return 存储类型，如 LOCAL、COS、OSS
+     */
+    String getStorageType();
+}
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/storage/impl/CosFileStorageStrategy.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/storage/impl/CosFileStorageStrategy.java
new file mode 100644
index 0000000..5013f93
--- /dev/null
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/storage/impl/CosFileStorageStrategy.java
@@ -0,0 +1,164 @@
+package cn.meowrain.aioj.backend.fileservice.storage.impl;
+
+import cn.meowrain.aioj.backend.fileservice.storage.FileStorageStrategy;
+import com.qcloud.cos.COSClient;
+import com.qcloud.cos.ClientConfig;
+import com.qcloud.cos.auth.BasicCOSCredentials;
+import com.qcloud.cos.auth.COSCredentials;
+import com.qcloud.cos.http.HttpMethodName;
+import com.qcloud.cos.model.ObjectMetadata;
+import com.qcloud.cos.model.PutObjectRequest;
+import com.qcloud.cos.region.Region;
+import jakarta.annotation.PostConstruct;
+import jakarta.annotation.PreDestroy;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.stereotype.Component;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.Date;
+
+/**
+ * 腾讯云COS文件存储策略
+ *
+ * @author meowrain
+ * @since 2026-01-10
+ */
+@Slf4j
+@Component("cosFileStorageStrategy")
+@ConditionalOnProperty(prefix = "file-config.cos", name = "enabled", havingValue = "true")
+public class CosFileStorageStrategy implements FileStorageStrategy {
+
+    @Value("${file-config.cos.secret-id}")
+    private String secretId;
+
+    @Value("${file-config.cos.secret-key}")
+    private String secretKey;
+
+    @Value("${file-config.cos.region}")
+    private String region;
+
+    @Value("${file-config.cos.bucket-name}")
+    private String bucketName;
+
+    @Value("${file-config.cos.domain:}")
+    private String domain;
+
+    @Value("${file-config.cos.prefix:}")
+    private String prefix;
+
+    @Value("${file-config.cos.presigned-url-expire-seconds:3600}")
+    private Integer presignedUrlExpireSeconds;
+
+    private COSClient cosClient;
+
+    @PostConstruct
+    public void init() {
+        try {
+            COSCredentials cred = new BasicCOSCredentials(secretId, secretKey);
+            ClientConfig clientConfig = new ClientConfig(new Region(region));
+            cosClient = new COSClient(cred, clientConfig);
+            log.info("腾讯云COS存储初始化成功, bucket: {}, region: {}", bucketName, region);
+        } catch (Exception e) {
+            log.error("腾讯云COS存储初始化失败", e);
+            throw new RuntimeException("初始化腾讯云COS存储失败", e);
+        }
+    }
+
+    @PreDestroy
+    public void destroy() {
+        if (cosClient != null) {
+            cosClient.shutdown();
+            log.info("腾讯云COS客户端已关闭");
+        }
+    }
+
+    @Override
+    public String upload(org.springframework.web.multipart.MultipartFile file, String filePath) throws IOException {
+        try {
+            String key = buildKey(filePath);
+            ObjectMetadata metadata = new ObjectMetadata();
+            metadata.setContentLength(file.getSize());
+            metadata.setContentType(file.getContentType());
+
+            PutObjectRequest request = new PutObjectRequest(bucketName, key, file.getInputStream(), metadata);
+            cosClient.putObject(request);
+
+            log.info("文件上传到COS成功: {}", key);
+            return getFileUrl(filePath);
+        } catch (Exception e) {
+            log.error("文件上传到COS失败: {}", filePath, e);
+            throw new IOException("文件上传到COS失败: " + e.getMessage(), e);
+        }
+    }
+
+    @Override
+    public String upload(InputStream inputStream, String filePath, long fileSize) throws IOException {
+        try {
+            String key = buildKey(filePath);
+            ObjectMetadata metadata = new ObjectMetadata();
+            metadata.setContentLength(fileSize);
+
+            PutObjectRequest request = new PutObjectRequest(bucketName, key, inputStream, metadata);
+            cosClient.putObject(request);
+
+            log.info("文件流上传到COS成功: {}", key);
+            return getFileUrl(filePath);
+        } catch (Exception e) {
+            log.error("文件流上传到COS失败: {}", filePath, e);
+            throw new IOException("文件流上传到COS失败: " + e.getMessage(), e);
+        }
+    }
+
+    @Override
+    public boolean delete(String filePath) {
+        try {
+            String key = buildKey(filePath);
+            cosClient.deleteObject(bucketName, key);
+            log.info("文件从COS删除成功: {}", key);
+            return true;
+        } catch (Exception e) {
+            log.error("文件从COS删除失败: {}", filePath, e);
+            return false;
+        }
+    }
+
+    @Override
+    public boolean exists(String filePath) {
+        try {
+            String key = buildKey(filePath);
+            return cosClient.doesObjectExist(bucketName, key);
+        } catch (Exception e) {
+            log.error("检查文件是否存在失败: {}", filePath, e);
+            return false;
+        }
+    }
+
+    @Override
+    public String getFileUrl(String filePath) {
+        String key = buildKey(filePath);
+
+        if (domain != null && !domain.isEmpty()) {
+            return domain + "/" + key;
+        }
+
+        Date expirationDate = new Date(System.currentTimeMillis() + presignedUrlExpireSeconds * 1000L);
+        URL url = cosClient.generatePresignedUrl(bucketName, key, expirationDate, HttpMethodName.GET);
+        return url.toString();
+    }
+
+    @Override
+    public String getStorageType() {
+        return "COS";
+    }
+
+    private String buildKey(String filePath) {
+        if (prefix != null && !prefix.isEmpty()) {
+            return prefix + "/" + filePath;
+        }
+        return filePath;
+    }
+}
diff --git a/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/storage/impl/LocalFileStorageStrategy.java b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/storage/impl/LocalFileStorageStrategy.java
new file mode 100644
index 0000000..6f16eb9
--- /dev/null
+++ b/aioj-backend-file-service/src/main/java/cn/meowrain/aioj/backend/fileservice/storage/impl/LocalFileStorageStrategy.java
@@ -0,0 +1,116 @@
+package cn.meowrain.aioj.backend.fileservice.storage.impl;
+
+import cn.meowrain.aioj.backend.fileservice.storage.FileStorageStrategy;
+import cn.hutool.core.io.FileUtil;
+import jakarta.annotation.PostConstruct;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+
+/**
+ * 本地文件存储策略
+ *
+ * @author meowrain
+ * @since 2026-01-10
+ */
+@Slf4j
+@Component("localFileStorageStrategy")
+@RequiredArgsConstructor
+public class LocalFileStorageStrategy implements FileStorageStrategy {
+
+    @Value("${file-config.local.base-path:uploads}")
+    private String basePath;
+
+    @Value("${file-config.local.domain:http://localhost:10013/api}")
+    private String domain;
+
+    @Value("${file-config.local.url-prefix:/file}")
+    private String urlPrefix;
+
+    @PostConstruct
+    public void init() {
+        try {
+            Path baseDir = Paths.get(basePath);
+            if (!Files.exists(baseDir)) {
+                Files.createDirectories(baseDir);
+                log.info("创建本地文件存储目录: {}", basePath);
+            }
+        } catch (IOException e) {
+            log.error("创建本地文件存储目录失败: {}", basePath, e);
+            throw new RuntimeException("初始化本地文件存储失败", e);
+        }
+    }
+
+    @Override
+    public String upload(MultipartFile file, String filePath) throws IOException {
+        Path targetPath = Paths.get(basePath, filePath);
+        Path parentDir = targetPath.getParent();
+
+        if (parentDir != null && !Files.exists(parentDir)) {
+            Files.createDirectories(parentDir);
+        }
+
+        Files.copy(file.getInputStream(), targetPath, StandardCopyOption.REPLACE_EXISTING);
+        log.info("文件上传成功: {}", targetPath);
+
+        return getFileUrl(filePath);
+    }
+
+    @Override
+    public String upload(InputStream inputStream, String filePath, long fileSize) throws IOException {
+        Path targetPath = Paths.get(basePath, filePath);
+        Path parentDir = targetPath.getParent();
+
+        if (parentDir != null && !Files.exists(parentDir)) {
+            Files.createDirectories(parentDir);
+        }
+
+        Files.copy(inputStream, targetPath, StandardCopyOption.REPLACE_EXISTING);
+        log.info("文件流上传成功: {}", targetPath);
+
+        return getFileUrl(filePath);
+    }
+
+    @Override
+    public boolean delete(String filePath) {
+        try {
+            Path targetPath = Paths.get(basePath, filePath);
+            if (Files.exists(targetPath)) {
+                Files.delete(targetPath);
+                log.info("文件删除成功: {}", targetPath);
+                return true;
+            }
+            return false;
+        } catch (IOException e) {
+            log.error("文件删除失败: {}", filePath, e);
+            return false;
+        }
+    }
+
+    @Override
+    public boolean exists(String filePath) {
+        Path targetPath = Paths.get(basePath, filePath);
+        return Files.exists(targetPath);
+    }
+
+    @Override
+    public String getFileUrl(String filePath) {
+        // 确保URL中始终使用正斜杠
+        String normalizedPath = filePath.replace("\\", "/");
+        return domain + urlPrefix + "/" + normalizedPath;
+    }
+
+    @Override
+    public String getStorageType() {
+        return "LOCAL";
+    }
+}
diff --git a/aioj-backend-file-service/src/main/resources/application.yml b/aioj-backend-file-service/src/main/resources/application.yml
index 5f2c040..69dd91c 100644
--- a/aioj-backend-file-service/src/main/resources/application.yml
+++ b/aioj-backend-file-service/src/main/resources/application.yml
@@ -3,6 +3,10 @@ spring:
     name: file-service
   profiles:
     active: @env@
+  servlet:
+    multipart:
+      max-file-size: 500MB
+      max-request-size: 500MB
 server:
   port: 10013
   servlet:
@@ -20,8 +24,8 @@ springdoc:
     operations-sorter: alpha
   group-configs:
     - group: 'default'
-      paths-to-match: '/api/**'
-      packages-to-scan: cn.meowrain.aioj.backend.fileservice.controller
+      paths-to-match: '/**'
+      packages-to-scan: cn.meowrain.aioj.backend.fileservice
 knife4j:
   basic:
     enable: true
@@ -31,7 +35,48 @@ mybatis-plus:
   configuration:
     log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
   mapper-locations: classpath*:/mapper/**/*.xml
-aioj:
-  log:
-    enabled: true
-    max-length: 20000
\ No newline at end of file
+
+# 文件存储配置
+file-config:
+  # 是否使用云存储（true=腾讯云COS，false=本地存储）
+  use-cloud: false
+  # 是否启用文件去重（相同文件只存储一份）
+  deduplication-enabled: true
+  # 同步计算哈希的文件大小阈值（字节），默认 10MB
+  sync-hash-threshold: 10485760
+  # 本地存储配置
+  local:
+    # 本地存储基础路径（相对路径）
+    base-path: uploads
+    # 访问域名（不含context-path）
+    domain: http://localhost:10013
+    # URL前缀（需包含context-path）
+    url-prefix: /api/file
+  # 腾讯云COS存储配置
+  cos:
+    # 是否启用COS
+    enabled: false
+    # 腾讯云SecretId
+    secret-id: your-secret-id
+    # 腾讯云SecretKey
+    secret-key: your-secret-key
+    # 区域，如ap-guangzhou、ap-beijing等
+    region: ap-guangzhou
+    # 存储桶名称
+    bucket-name: your-bucket-name
+    # 访问域名（可选，如果配置则使用该域名生成访问URL）
+    domain: https://your-bucket-name.cos.ap-guangzhou.myqcloud.com
+    # 文件前缀
+    prefix: aioj
+    # 预签名URL过期时间（秒）
+    presigned-url-expire-seconds: 3600
+  # 异步线程池配置（用于大文件哈希计算）
+  async:
+    # 核心线程数
+    core-pool-size: 2
+    # 最大线程数
+    max-pool-size: 5
+    # 队列容量
+    queue-capacity: 100
+    # 线程名前缀
+    thread-name-prefix: file-async-