How SpringBoot integrates minio

<dependency>
        <groupId>io.minio</groupId>
        <artifactId>minio</artifactId>
        <version>3.0.10</version>
    </dependency>

package com.file.server.controller;
import io.minio.MinioClient;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
@RestController
public class MinioController {
   private static String url = "http://127.0.0.1:9000";  //minio服务的IP端口
   private static String accessKey = "W2ZWITFFDWFM5TWS3WI9";  
   private static String secretKey = "dNx++XsRJpjmWVQHWv8djMCFJ0A3YXbEr4qfKHR+";
   
    //上传文件到minio服务
 @PostMapping("upload")
 public String upload(@RequestParam("fileName") MultipartFile file )  {
   try {
       MinioClient minioClient = new MinioClient(url, accessKey, secretKey);
       InputStream is= file.getInputStream(); //得到文件流
       String fileName = file.getOriginalFilename(); //文件名
       String contentType = file.getContentType();  //类型
       minioClient.putObject("file",fileName,is,contentType); //把文件放置Minio桶(文件夹)
       return  "上传成功";
     }catch (Exception e){
         return "上传失败";
     }
    }
    //下载minio服务的文件
    @GetMapping("download")
    public String download(HttpServletResponse response){
        try {
          MinioClient minioClient = new MinioClient(url, accessKey, secretKey);
          InputStream fileInputStream = minioClient.getObject("file", "test.jpg");
          response.setHeader("Content-Disposition", "attachment;filename=" + "test.jpg");
          response.setContentType("application/force-download");
          response.setCharacterEncoding("UTF-8");
          IOUtils.copy(fileInputStream,response.getOutputStream());
          return "下载完成";
        }catch (Exception e){
            return "下载失败";
        }
    }
    //获取minio文件的下载地址
    @GetMapping("url")
    public  String  getUrl(){
        try {
            MinioClient minioClient = new MinioClient(url, accessKey, secretKey);
            String url = minioClient.presignedGetObject("file", "test.jpg");
            return url;
        }catch (Exception e){
            return "获取失败";
        }
    }
}