java实现oss文件上传

以下是java实现oss文件上传的示例代码：

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.utils.IOUtils;
import com.aliyun.oss.model.ObjectMetadata;
import com.aliyun.oss.model.PutObjectRequest;
import com.aliyun.oss.model.PutObjectResult;
import java.io.FileInputStream;
import java.io.InputStream;

public class OSSUploadDemo {

    public static void main(String[] args) {
        String endpoint = "<yourEndpoint>";
        String accessKeyId = "<yourAccessKeyId>";
        String accessKeySecret = "<yourAccessKeySecret>";
        String bucketName = "<yourBucketName>";
        String objectName = "<yourObjectName>";
        String filePath = "<yourFilePath>";

        // 创建OSSClient实例
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

        try {
            // 创建上传请求
            PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, objectName, new FileInputStream(filePath));
            // 设置上传文件的元信息
            ObjectMetadata metadata = new ObjectMetadata();
            metadata.setContentLength(putObjectRequest.getInputStream().available());
            putObjectRequest.setMetadata(metadata);

            // 执行上传操作并返回结果
            PutObjectResult putObjectResult = ossClient.putObject(putObjectRequest);

            System.out.println("上传成功：" + putObjectResult.getETag());
        } catch (Exception e) {
            System.out.println("上传失败：" + e.getMessage());
        } finally {
            // 关闭OSSClient实例
            ossClient.shutdown();
        }
    }
}

其中，需要替换的变量如下：

- `endpoint`：OSS服务的访问域名，例如`http://oss-cn-hangzhou.aliyuncs.com`
- `accessKeyId`：访问OSS服务的AccessKeyId
- `accessKeySecret`：访问OSS服务的AccessKeySecret
- `bucketName`：存储文件的Bucket名称
- `objectName`：上传文件在Bucket中的Object名称
- `filePath`：要上传的文件路径