开通对象存储服务

在对象存储oss创建Bucket列表，详细流程去网上可以看教程。

密钥管理

点击头像点击密钥管理

创建新密钥AccessKey

验证后会给你一个AccessKey ID和AccessKey Secret，把他复制好记录在记事本上。

写在yml配置文件中

#阿里云oss配置
alioss:
  endpoint: oss-cn-shanghai.aliyuncs.com
  access-key-id: LTAI5tKXTEM5sNWAMd5H2j5LGz
  access-key-secret: TDSTJK2SJ7UGyepbruIxEXWZ2LZsq8T7
  bucket-name: lonelykky

在这里写你刚刚复制的id和secret

相关配置

1.pom依赖

导入阿里云相关依赖

 <!--阿里云OSS-->
          <dependency>
              <groupId>com.aliyun.oss</groupId>
              <artifactId>aliyun-sdk-oss</artifactId>
              <version>3.10.2</version>
          </dependency>
          <dependency>
              <groupId>javax.xml.bind</groupId>
              <artifactId>jaxb-api</artifactId>
              <version>2.3.1</version>
          </dependency>
          <dependency>
          		<groupId>org.springframework.boot</groupId>
          		<artifactId>spring-boot-configuration-processor</artifactId>
          		<optional>true</optional>
     	 </dependency>

2.全局配置类

写入OssConfiguration 创建oss对象

@Configuration
@Slf4j
public class OssConfiguration {

    @Bean
    public AliOssUtil aliOssUtil(AliOssProperties aliOssProperties) {
        log.info("开始创建阿里云文件oss对象");
        return new AliOssUtil(aliOssProperties.getEndpoint(),
                aliOssProperties.getAccessKeyId(),
                aliOssProperties.getAccessKeySecret(),
                aliOssProperties.getBucketName());
    }
}

3.AliOssUtil 工具类

@Data
@AllArgsConstructor
@Slf4j
public class AliOssUtil {

    private String endpoint;
    private String accessKeyId;
    private String accessKeySecret;
    private String bucketName;

    /**
     * 文件上传
     *
     * @param bytes
     * @param objectName
     * @return
     */
    public String upload(byte[] bytes, String objectName) {

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

        try {
            // 创建PutObject请求。
            ossClient.putObject(bucketName, objectName, new ByteArrayInputStream(bytes));
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }

        //文件访问路径规则 https://BucketName.Endpoint/ObjectName
        StringBuilder stringBuilder = new StringBuilder("https://");
        stringBuilder
                .append(bucketName)
                .append(".")
                .append(endpoint)
                .append("/")
                .append(objectName);

        log.info("文件上传到:{}", stringBuilder.toString());

        return stringBuilder.toString();
    }
}

3.AliOssProperties类，用于读取yml文件中写入的密钥

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

@Component
@ConfigurationProperties(prefix = "alioss")
@Data
public class AliOssProperties {

    private String endpoint;
    private String accessKeyId;
    private String accessKeySecret;
    private String bucketName;

}

4.controller层，用于写传输文件的接口

package com.kkk.controller;

import com.kkk.common.utils.AliOssUtil;
import com.kkk.common.utils.Result;
import com.kkk.service.UploadService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.util.UUID;

/**
 * 文件上传
 * @author lonelykkk
 * @email 2765314967@qq.com
 * @date 2024/5/15 9:12
 * @Version V1.0
 */
@RestController
@Slf4j
public class UploadController {
    @Autowired
    private AliOssUtil aliOssUtil;
    @PostMapping("/upload")
    public Result upload(MultipartFile img) {
        log.info("file：{}", img);
        try {
            //原始文件名
            String originalFilename = img.getOriginalFilename();
            //截取原始文件名的后缀   dfdfdf.png
            String extension = originalFilename.substring(originalFilename.lastIndexOf("."));
            //构造新文件名称
            String objectName = UUID.randomUUID().toString() + extension;

            //文件的请求路径
            String filePath = aliOssUtil.upload(img.getBytes(), objectName);
            return Result.okResult(filePath);
        } catch (IOException e) {
            log.error("文件上传失败：{}", e);
        }
        return Result.errorResult(507, "文件上传失败");
    }
}

接下来就可以根据请求路径上传文件了。