文件上传阿里云OSS

spring boot + mybatis-plus

pom.xml 导包

<dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.4</version>
  </dependency>
 
  <!--        阿里云 对象存储-->
  <dependency>
      <groupId>com.aliyun.oss</groupId>
      <artifactId>aliyun-sdk-oss</artifactId>
      <version>3.15.0</version>
  </dependency>    

.yml 配置

servlet:
  multipart:
    max-request-size: 100MB
mvc:
  pathmatch:
    matching-strategy: ant_path_matcher

上传文件的工具类

public class AliOssUtil {
 
    //存储空间所在的城市域名
    public static final String endpoint = "oss-cn-beijing.aliyuncs.com";
    //账号的key -保密
    public static final String accessKeyId = "LTAI5t5ZPUfK5nTEUPCwzSxP";
    //账号的密钥 -保密
    public static final String accessKeySecret = "BdWzLO0B8Z7YhzBK3Hx2CvQJudyo32";
    //存储空间名
    public static final String bucketName = "Java2022";
 
    //阿里云 Oss的客户端对象
    private static OSS client;
    static {
        //  完成实例化
        client = new OSSClientBuilder().build(endpoint,accessKeyId,accessKeySecret);
    }
 
    /**
     * @Description: 上传资源，新增文件
     * @param: [fileName 上传的文件名, data 文件内容, date 访问地址的有效期]
     * @return: 返回 访问地址
    */
    public static String upload(String fileName, byte[] data, Date date){
        //  上传文件内容
        client.putObject(bucketName,fileName,new ByteArrayInputStream(data));
        //  返回访问地址
        return getUrl(fileName,date);
    }
 
    /**
     * @Description: 获取对象的访问地址
     * @param: [fileName 文件名, date 访问地址的有效期]
     * @return: java.lang.String
    */
    public static String getUrl(String fileName,Date date){
        return client.generatePresignedUrl(bucketName,fileName,date).toString();
    }
 
    /**
     * @Description: 验证对象是否存在
     * @param: [fileName 文件名]
     * @return: boolean
    */
    public static boolean exists(String fileName){
        return client.doesObjectExist(bucketName,fileName);
    }
 
    /**
     * @Description: 删除文件
     * @param: [fileName 文件名]
     * @return: boolean
    */
    public static boolean delete(String fileName){
        try {
            client.deleteObject(bucketName,fileName);
            return true;
        }catch (Exception e){
            return false;
        }
 
    }
     
}

控制器写法

@PostMapping("/uploadOss.do")
   public String uploadOss(@RequestPart MultipartFile file) throws IOException {
       //  验证文件是否为空
       if (!file.isEmpty()){
           //  获取文件名
           String fn = file.getOriginalFilename();
           //  获取文件内容
           byte[] data = file.getBytes();
           //  存储文件到阿里云的OSS服务器
           Calendar calendar = Calendar.getInstance();
           calendar.add(Calendar.YEAR,10);
           String url = AliOssUtil.upload(fn, data, calendar.getTime());
           return url;
       }else {
           return "文件为空！！！";
       }
   }