Java 上传图片至阿里 OSS 文件存储系统，java 面试问题及答案

<dependency>

<groupId>com.aliyun.oss</groupId>

<artifactId>aliyun-sdk-oss</artifactId>

<version>3.10.2</version>

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</dependency>

以上传文件夹为例，工作中正好遇到这个需求，简单记录一下。

前端界面

接口

ossUtils 工具类

cesh

/**

• 上传文件

• dugt1998@163.com

*/

public String uploadImage(MultipartFile file) throws Exception {

InputStream in = file.getInputStream();

String fileOriginalFilename = file.getOriginalFilename();

String fileName = fileOriginalFilename.split("/")[1];

ObjectMetadata metadata = new ObjectMetadata();

metadata.setContentLength(in.available());

metadata.setCacheControl("no-cache");

metadata.setHeader("Access-Control-Allow-Origin", "*");

metadata.setHeader("Access-Control-Allow-Methods", "POST GET HEAD PUT DELETE");

metadata.setHeader("Access-Control-Max-Age", "3600");

metadata.setHeader("Pragma", "no-cache");

metadata.setContentEncoding("utf-8");

metadata.setContentType(fileName);

OSS oss = new OSSClientBuilder().build(endPoint, accessKeyId, accessKeySecret);

oss.putObject(bucket, fileDir + fileName, in, metadata);

oss.shutdown();

in.close();

return "https://" + bucket + "." + endPoint + "/" + fileDir + fileName;

}

老样子，写完测试?

OK！！！

Oss utils

import com.aliyun.oss.OSS;

import com.aliyun.oss.OSSClientBuilder;

import com.aliyun.oss.model.ObjectMetadata;

import org.springframework.stereotype.Component;

import org.springframework.web.multipart.MultipartFile;

import java.io.InputStream;

import java.util.*;

/**

• @author dugt1998@163.com

• @date 2020/11/21 9:13

*/

@Component

public class OSSUtils {

private static final String END_POINT = "oss-cn-qingdao.aliyuncs.com";

private static final String ACCESS_KEY_ID = "";

private static final String ACCESS_KEY_SECRET = "";

private static final String BUCKET = "";

private static final String FILE_DIR = "test/";

/**

• 上传文件

• dugt1998@163.com

*/

public String uploadImage(MultipartFile file) throws Exception {

InputStream in = file.getInputStream();

String fileName = file.getOriginalFilename();

ObjectMetadata metadata = new ObjectMetadata();

metadata.setContentLength(in.available());

metadata.setCacheControl("no-cache");

metadata.setHeader("Access-Control-Allow-Origin", "*");

metadata.setHeader("Access-Control-Allow-Methods", "POST GET HEAD PUT DELETE");

metadata.setHeader("Access-Control-Max-Age", "3600");

metadata.setHeader("Pragma", "no-cache");

metadata.setContentEncoding("utf-8");

metadata.setContentType(getContentType(fileName));

OSS oss = new OSSClientBuilder().build(END_POINT, ACCESS_KEY_ID, ACCESS_KEY_SECRET);

oss.putObject(BUCKET, FILE_DIR + fileName, in, metadata);

总结

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