三、核心代码实现

3.1 客户端上传表单设计

    
    Upload to Huawei Cloud

3.2 服务端处理逻辑（Spring Boot示例）

@PostMapping("/upload")
public String handleFileUpload(@RequestParam("file") MultipartFile file) {
    // 初始化OBS客户端
    ObsClient obsClient = new ObsClient(
        "your-access-key",
        "your-secret-key",
        "https://obs.ap-southeast-1.myhuaweicloud.com"
    );
    
    try {
        // 生成唯一文件名
        String fileName = UUID.randomUUID() + "_" + file.getOriginalFilename();
        
        // 上传到OBS
        PutObjectRequest request = new PutObjectRequest(
            "your-bucket-name",
            fileName,
            file.getInputStream()
        );
        obsClient.putObject(request);
        
        return "Upload success! File URL: " + 
               "https://your-bucket-name.obs.ap-southeast-1.myhuaweicloud.com/" + fileName;
    } catch (Exception e) {
        return "Upload failed: " + e.getMessage();
    }
}

四、高级功能与优化策略

4.1 大文件分片上传

华为云OBS支持断点续传和分片上传，适合超过100MB的大文件：

// 初始化分片上传
InitiateMultipartUploadRequest initRequest = 
    new InitiateMultipartUploadRequest("bucketName", "objectKey");
InitiateMultipartUploadResult initResult = obsClient.initiateMultipartUpload(initRequest);

// 上传分片（循环执行）
UploadPartRequest uploadPartRequest = new UploadPartRequest();
uploadPartRequest.setBucketName("bucketName");
uploadPartRequest.setObjectKey("objectKey");
uploadPartRequest.setUploadId(initResult.getUploadId());
uploadPartRequest.setPartNumber(1); // 分片序号
uploadPartRequest.setInput(new ByteArrayInputStream(data));
UploadPartResult uploadPartResult = obsClient.uploadPart(uploadPartRequest);

4.2 安全增强措施

• 临时访问凭证：使用临时AK/SK代替长期凭证
• 文件类型校验：通过Magic Number验证真实文件类型
• 病毒扫描：集成华为云企业主机安全服务（HSS）

五、监控与运维

通过华为云云监控服务（Cloud Eye）实现：

1. 设置OBS存储空间用量告警
2. 监控API调用次数和延迟
3. 通过日志服务LTS记录操作审计日志

六、总结

本文详细介绍了基于华为云国际站实现Java文件上传的完整方案，具有以下突出优势：

开发者通过华为云OBS SDK可以快速构建企业级文件上传服务，配合华为云的全栈安全能力和全球基础设施，能够为国际业务提供稳定可靠的文件存储解决方案。