将图片上传到阿里云并回显

1.导入依赖

 <!--   阿里云oss依赖     -->
        <dependency>
            <groupId>com.aliyun.oss</groupId>
            <artifactId>aliyun-sdk-oss</artifactId>
        </dependency>

2.添加配置ym

sky:
  alioss:
    endpoint: ${sky.alioss.endpoint}
    access-key-id: ${sky.access-key-id}
    access-key-secret: ${sky.access-key-secret}
    bucket-name: ${sky.bucket-name}

sky:
  alioss:
#    外网访问
    endpoint: oss-cn-guangzhou.aliyuncs.com
#    AccessKey ID
    access-key-id: ****
#    AccessKey ID
    access-key-secret: *****
#    bucket名字
    bucket-name: ****

3.创建工具类 AliOssUtil

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import java.io.ByteArrayInputStream;

@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();
    }
}

4.上传图片

import com.sky.result.Result;
import com.sky.utils.AliOssUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
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;

@Slf4j
@RestController
@RequestMapping("/admin/common")
@Api(tags = "通用接口")
public class CommonController {

    @Autowired
    private AliOssUtil aliOssUtil;

    /**
     * 文件上传
     */
    @PostMapping("/upload")
    @ApiOperation("文件上传")
    public Result upload(MultipartFile file) {

        try {
            log.info("获取到的文件：{}", file);
            //获取原始文件名
            String originalFilename = file.getOriginalFilename();
            //截取原始文件名的后缀 dfdfdfd.png
            String extension = originalFilename.substring(originalFilename.lastIndexOf("."));
            //构建新的文件名称
            String ObjectName = UUID.randomUUID().toString() + extension;
            //返回前端的文件的请求路径
            String filePath = aliOssUtil.upload(file.getBytes(), ObjectName);
            return Result.success(filePath);
        } catch (IOException e) {
            log.info("文件上传失败：{}", e);
        }
        return null;
    }
}