springBoot接入阿里云oss的实现步骤

maven导入依赖

<dependencies>
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-thymeleaf</artifactId>
   </dependency>
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
   </dependency>

<dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-devtools</artifactId>
     <scope>runtime</scope>
     <optional>true</optional>
   </dependency>
   <dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
     <scope>runtime</scope>
   </dependency>
   <dependency>
     <groupId>org.projectlombok</groupId>
     <artifactId>lombok</artifactId>
     <optional>true</optional>
   </dependency>
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-test</artifactId>
     <scope>test</scope>
   </dependency>
   <dependency>
     <groupId>com.alibaba</groupId>
     <artifactId>fastjson</artifactId>
     <version>1.2.15</version>
   </dependency>
   <dependency>
     <groupId>commons-lang</groupId>
     <artifactId>commons-lang</artifactId>
     <version>2.6</version>
   </dependency>
   <!-- 阿里云OSS -->
   <dependency>
     <groupId>com.aliyun.oss</groupId>
     <artifactId>aliyun-sdk-oss</artifactId>
     <version>3.10.2</version>
   </dependency>
 </dependencies>

定义阿里云上传结果实体

package com.example.demo.entity;

import lombok.Data;

/**
* 阿里云上传结果集
*
* @author wushuai
* @create 2021-01-25
*/
@Data
public class AliyunOssResult {
 /**
  * code：200成功
  * code: 400失败
  */
 private int code;

/**
  * 上传成功的返回url
  */
 private String url;

/**
  * 提示信息
  */
 private String msg;
}

yml设置阿里云oss参数

aliyunOss:
endpoint: "http://oss-cn-shanghai.aliyuncs.com"
accessKeyId: "xxxxxxx"
accessKeySecret: "xxxxxxx"
bucketName: "xxxxxx"
urlPrefix: "http://bucketName.oss-cn-shanghai.aliyuncs.com/"

yml设置上传文件大小限制

spring:
servlet:
 multipart:
  max-file-size: 20MB
  max-request-size: 20MB

工具类封装

package com.example.demo.util;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.model.DeleteObjectsRequest;
import com.aliyun.oss.model.DeleteObjectsResult;
import com.aliyun.oss.model.GeneratePresignedUrlRequest;
import com.example.demo.entity.AliyunOssResult;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.io.InputStream;
import java.net.URL;
import java.util.Date;
import java.util.List;

@Component
public class AliyunOSSUtil {

@Value("${aliyunOss.endpoint}")
 private String endpoint;
 @Value("${aliyunOss.accessKeyId}")
 private String accessKeyId;
 @Value("${aliyunOss.accessKeySecret}")
 private String accessKeySecret;
 @Value("${aliyunOss.bucketName}")
 private String bucketName;
 @Value("${aliyunOss.urlPrefix}")
 private String urlPrefix;

/**
  * 上传文件，以IO流方式
  *
  * @param inputStream 输入流
  * @param objectName   唯一objectName（在oss中的文件名字）
  */
 public AliyunOssResult upload(InputStream inputStream, String objectName) {
   AliyunOssResult aliyunOssResult = new AliyunOssResult();
   try {
     // 创建OSSClient实例。
     OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
     // 上传内容到指定的存储空间（bucketName）并保存为指定的文件名称（objectName）。
     ossClient.putObject(bucketName, objectName, inputStream);
     // 关闭OSSClient。
     ossClient.shutdown();
     aliyunOssResult.setCode(200);
     aliyunOssResult.setUrl(urlPrefix+objectName);
     aliyunOssResult.setMsg("上传成功");
   } catch (Exception e) {
     e.printStackTrace();
     aliyunOssResult.setCode(400);
     aliyunOssResult.setMsg("上传失败");
   }
   return aliyunOssResult;
 }

/**
  * 删除OSS中的单个文件
  *
  * @param objectName 唯一objectName（在oss中的文件名字）
  */
 public void delete(String objectName) {
   try {
     // 创建OSSClient实例。
     OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
     // 删除文件。
     ossClient.deleteObject(bucketName, objectName);
     // 关闭OSSClient。
     ossClient.shutdown();
   } catch (Exception e) {
     e.printStackTrace();
   }
 }

/**
  * 批量删除OSS中的文件
  *
  * @param objectNames oss中文件名list
  */
 public void delete(List<String> objectNames) {
   try {
     // 创建OSSClient实例。
     OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
     // 批量删除文件。
     DeleteObjectsResult deleteObjectsResult = ossClient.deleteObjects(new DeleteObjectsRequest(bucketName).withKeys(objectNames));
     List<String> deletedObjects = deleteObjectsResult.getDeletedObjects();
     // 关闭OSSClient。
     ossClient.shutdown();
   } catch (Exception e) {
     e.printStackTrace();
   }
 }

/**
  * 获取文件临时url
  *
  * @param objectName oss中的文件名
  * @param effectiveTime 有效时间(ms)
  */
 public String getUrl(String objectName,long effectiveTime){
   OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
   // 设置URL过期时间
   Date expiration = new Date(new Date().getTime() + effectiveTime);
   GeneratePresignedUrlRequest generatePresignedUrlRequest ;
   generatePresignedUrlRequest =new GeneratePresignedUrlRequest(bucketName, objectName);
   generatePresignedUrlRequest.setExpiration(expiration);
   URL url = ossClient.generatePresignedUrl(generatePresignedUrlRequest);
   return url.toString();
 }

}

controller接收调用

package com.example.demo.controller;

import com.example.demo.util.AliyunOSSUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

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

@RestController
@RequestMapping("/file")
public class FileController {

@Autowired
 private AliyunOSSUtil aliyunOSSUtil;

@RequestMapping(value = "/uploadFile")
 public @ResponseBody
 Object uploadFile(@RequestParam(value = "file", required = false) MultipartFile file,
          String strPath) throws IOException {
   String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1);
   String objectName = strPath+"/"+ UUID.randomUUID().toString()+"."+suffix;
   return aliyunOSSUtil.upload(file.getInputStream(),objectName);
 }
}

postman测试

来源：https://blog.csdn.net/qq_41541368/article/details/113114086