springboot整合阿里云oss上传的方法示例

OSS申请和配置

1. 注册登录

输入网址：https://www.aliyun.com/product/oss

如果没有账号点击免费注册，然后登录。

2.开通以及配置

点击立即开通

进入管理控制台

第一次使用会出现引导，按引导点击“我知道了”，然后点击创建Bucket。

如果没有存储包或流量包点击购买。

点击确定，返回主页面，出现该页面，点击我知道了

将EndPoint记录下来，方便后期添加到我们项目的配置文件中

创建 AccessKeyID 和 AccessKeySecret

点击创建Access key，第一次需要短信验证，验证成功后弹出

保留Access key 以及 AccessKeySecret 信息

springboot整合使用

1. 进入我们springboot的项目中，导入oss相关依赖

<dependency>
 <groupId>com.aliyun.oss</groupId>
 <artifactId>aliyun-sdk-oss</artifactId>
 <version>2.8.3</version>
</dependency>

2. 再配置文件中添加相关信息

oss.aliyun.accessKeyId= #
oss.aliyun.accessKeySecret= #
oss.aliyun.bucketName= mutest-qcby-oss
oss.aliyun.endpoint= #
oss.aliyun.pubFlag= false
oss.aliyun.expiration= 100
oss.aliyun.sslNmae= #内网使用，不必须

3. 书写获取配置信息的java文件，建立properties包（导入依赖，否则无法识别这个包）

<dependency>
 	 <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-configuration-processor</artifactId>
  <optional>true</optional>
 </dependency>

OssProerties.java

import com.mbyte.easy.oss.OssUtil;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;

/**
 * @ClassName: OssProerties
 * @Description: 阿里云 对象云存储配置类
 * @Author: zte
 * @Date: 2019-02-14 09:37
 * @Version 1.0
 **/
@Data
@Component
@ConfigurationProperties(prefix = "oss.aliyun")
public class OssProerties {
 private String accessKeyId;
 private String accessKeySecret;
 private String bucketName;
 private String endpoint;
 private String bucket;
 private boolean pubFlag;
 private String sslNmae;

 @PostConstruct
 public void init(){
  //Oss工具类配置初始化
  OssUtil.initConfig(this);
 }

 //过期时间
 private int expiration;

 public String getAccessKeyId() {
  return accessKeyId;
 }

 public OssProerties setAccessKeyId(String accessKeyId) {
  this.accessKeyId = accessKeyId;
  return this;
 }

 public String getAccessKeySecret() {
  return accessKeySecret;
 }

 public OssProerties setAccessKeySecret(String accessKeySecret) {
  this.accessKeySecret = accessKeySecret;
  return this;
 }

 public String getBucketName() {
  return bucketName;
 }

 public OssProerties setBucketName(String bucketName) {
  this.bucketName = bucketName;
  return this;
 }

 public String getEndpoint() {
  return endpoint;
 }

 public OssProerties setEndpoint(String endpoint) {
  this.endpoint = endpoint;
  return this;
 }

 public String getBucket() {
  return bucket;
 }

 public OssProerties setBucket(String bucket) {
  this.bucket = bucket;
  return this;
 }

 public boolean isPubFlag() {
  return pubFlag;
 }

 public void setPubFlag(boolean pubFlag) {
  this.pubFlag = pubFlag;
 }

 public int getExpiration() {
  return expiration;
 }

 public OssProerties setExpiration(int expiration) {
  this.expiration = expiration;
  return this;
 }

 @Override
 public String toString() {
  return "OssPro{" +
    "accessKeyId='" + accessKeyId + '\'' +
    ", accessKeySecret='" + accessKeySecret + '\'' +
    ", bucketName='" + bucketName + '\'' +
    ", endpoint='" + endpoint + '\'' +
    ", bucket='" + bucket + '\'' +
    ", expiration=" + expiration +
    '}';
 }
}

4. 整合oss,书写相关java文件

1. 文件常量java文件 FileConstants.java

package com.mbyte.easy.oss;

import org.springframework.util.ClassUtils;

import java.io.File;

/**
 * @ClassName: FileConstants
 * @Description: 文件常量
 * @Author: lxt
 * @Date: 2019-02-19 09:59
 * @Version 1.0
 **/
public class FileConstants {
 /**
  * 文件存储临时文件夹
  */
 public final static String TEMP_ROOT = "temp";
 /**
  * 下载暂存目录
  */
 public final static String DOWNLOAD = TEMP_ROOT+ File.separator+"download";
 /**
  * 后缀名相关常量(包含【.】)
  */
 public final static String SUFFIX_ZIP = ".zip";
 /**
  * png图片后缀
  */
 public final static String SUFFIX_png = ".png";
 /**
  * 二维码暂存路径 eg：微信支付二维码
  */
 public static final String QRCODE = "qrcode";
 public static final String QRCODE_PATH = ClassUtils.getDefaultClassLoader().getResource("static").getPath()+File.separator+QRCODE;

 /**
  * 文件的后缀名
  */
 public static final String FILE_TYPE_AVI = "avi";
 public static final String FILE_TYPE_CSV = "csv";
 public static final String FILE_TYPE_DOC = "doc";
 public static final String FILE_TYPE_DOCX = "docx";
 public static final String FILE_TYPE_MP3 = "mp3";
 public static final String FILE_TYPE_PDF = "pdf";
 public static final String FILE_TYPE_PPT = "ppt";
 public static final String FILE_TYPE_PPTX = "pptx";
 public static final String FILE_TYPE_RAR = "rar";
 public static final String FILE_TYPE_TXT = "txt";
 public static final String FILE_TYPE_XLS = "xls";
 public static final String FILE_TYPE_ZIP = "zip";
 /**
  * 文件对应图片的oss路径
  */
 public static final String FILE_TYPE_AVI_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205092751242.U27AJS.png?Expires=4731182871&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=0S4nIClHiI11Iw2SOnLoKuwpiDc%3D";
 public static final String FILE_TYPE_CSV_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205092859378.A0J8R6.png?Expires=4731182939&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=McS77A%2BMOkmSjBfZziIxLeR5QCM%3D";
 public static final String FILE_TYPE_DOC_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205092908602.QHFWCO.png?Expires=4731182949&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=%2Fr9V%2FP8nmfYKVbANe2fl1qR%2FFwg%3D";
 public static final String FILE_TYPE_DOCX_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205092908602.QHFWCO.png?Expires=4731182949&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=%2Fr9V%2FP8nmfYKVbANe2fl1qR%2FFwg%3D";
 public static final String FILE_TYPE_MP3_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205092920411.L5CBAF.png?Expires=4731182960&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=wPz2ylPAg%2FpBqyIz4LztacVfRwo%3D";
 public static final String FILE_TYPE_PDF_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205092930146.CU0CAD.png?Expires=4731182970&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=Nwl6%2BkZmosARipe%2BoVJT3FdRLqM%3D";
 public static final String FILE_TYPE_PPT_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205092939365.XHOX9G.png?Expires=4731182979&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=3CDxl0W5ymVXe2XLnxLn1ewc1gU%3D";
 public static final String FILE_TYPE_PPTX_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205092939365.XHOX9G.png?Expires=4731182979&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=3CDxl0W5ymVXe2XLnxLn1ewc1gU%3D";
 public static final String FILE_TYPE_RAR_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205092949684.9OW7L9.png?Expires=4731182989&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=RCKarsekmPG3CXI5D6MLpJ4ocj4%3D";
 public static final String FILE_TYPE_TXT_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205092959887.TF1K0N.png?Expires=4731183000&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=9l44IQ0FZdQMcRq92PPOXlBKEFk%3D";
 public static final String FILE_TYPE_XLS_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205093007830.M6O08Z.png?Expires=4731183008&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=GeNmvgi7TGMq3uk9AG0%2BJRWRFY0%3D";
 public static final String FILE_TYPE_ZIP_ROUTE = "https://hmett.oss-cn-beijing.aliyuncs.com/20191205093017998.Q39L45.png?Expires=4731183018&OSSAccessKeyId=LTAI4FqUE3bJs9FK7Sj65JnM&Signature=djzJ7rTgH8LvCeaMfWGXUAQIpJE%3D";
}

2. 文件操作工具类 OssFileUtils.java

import com.mbyte.easy.common.web.AjaxResult;
import com.mbyte.easy.oss.OssUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.*;

/**
 * @ClassName: DesignFileUtils
 * @Description: 文件操作工具类
 * @Author: lxt
 * @Date: 2019-02-15 14:50
 * @Version 1.0
 **/
@Slf4j
public class OssFileUtils {
 /**
  * @Title: uploadSingleFile
  * @Description: 单个文件上传
  * @Author: zte
  * @param: file
  * @Date: 2019-02-15 14:56
  * @return: java.lang.String 成功返回 文件路径，失败返回null
  * @throws:
  */
 public static String uploadSingleFile(MultipartFile file){
  if(file == null){
   log.error("单文件上传失败，文件为空");
   return null;
  }
  try {
   return OssUtil.upload(OssUtil.generateKey(file.getOriginalFilename()),file.getBytes());
  } catch (Exception e) {
   log.error("单文件上传异常【"+file+"】",e);
  }
  return null;
 }
 /**
  * @Title: uploadSingleFile
  * @Description: 单个文件上传
  * @Author: lxt
  * @param: file
  * @Date: 2019-02-15 14:56
  * @return: java.lang.String 成功返回 文件路径，失败返回null
  * @throws:
  */
 public static String uploadSingleFile(File file){
  if(file == null){
   log.error("单文件上传失败，文件为空");
   return null;
  }
  try {
   return OssUtil.upload(OssUtil.generateKey(file.getName()),file);
  } catch (Exception e) {
   log.error("单文件上传异常【"+file+"】",e);
  }
  return null;
 }
 /**
  * @Title: uploadMultipartFile
  * @Description: 多文件文件上传
  * @Author: zte
  * @param: files
  * @Date: 2019-02-18 13:08
  * @return: java.util.List<java.lang.String> 成功返回 文件路径集合，失败返回null
  * @throws:
  */
 public static List<String> uploadMultipartFile(List<MultipartFile> fileList){
  List<String> filePaths = new ArrayList<>();
  Optional.ofNullable(fileList).ifPresent(fl->{
      fl.stream().forEach(f->{
       try {
        filePaths.add(OssUtil.upload(OssUtil.generateKey(f.getOriginalFilename()),f.getBytes()));
       } catch (IOException e) {
        log.error("多文件上传异常【"+f+"】",e);
       }
      });
    }
  );
  return filePaths;
 }
 /**
  * @Title: downloadSingleFileByOss
  * @Description: 下载阿里云文件到本地
  * @Author: lxt
  * @param: url 阿里云链接
  * @param: filePath 下载目录
  * @Date: 2019-02-18 13:13
  * @return: java.io.File
  * @throws:
  */
 public static File downloadSingleFile(String url,String filePath){
  try {
   return OssUtil.download2File(url,filePath);
  } catch (Exception e) {
   log.error("单文件下载异常【"+url+"】",e);
  }
  return null;
 }
 /**
  * @Title: downloadMultipartFileByOss
  * @Description: 批量下载阿里云文件到本地
  * @Author: zte
  * @param: urlList 阿里云链接集合
  * @param: dir 下载目录
  * @Date: 2019-02-18 13:19
  * @return: java.util.List<java.io.File>
  * @throws:
  */
 public static List<File> downloadMultipartFile(List<String> urlList,String dir){
  List<File> files = new ArrayList<>();
  Optional.ofNullable(urlList).ifPresent(fl->{
     fl.stream().forEach(f->files.add(OssUtil.download2Dir(f,dir)));
    }
  );
  return files;
 }
 /**
  * @Title: downloadMultipartFileByOssWithZip
  * @Description: 批量下载，打包成一个zip包
  * @Author: zte
  * @param: urlList
  * @param: zipPath
  * @Date: 2019-02-18 15:41
  * @return: java.io.File
  * @throws:
  */
// public static File downloadMultipartFileWithZip(List<String> urlList,String zipName){
//  try {
//   //压缩路径不存在，先创建
//   File zipDirFile = new File(FileConstants.DOWNLOAD);
//   if(!zipDirFile.exists()){
//    zipDirFile.mkdirs();
//   }
//   if(StringUtils.isNoneBlank(zipName) && !isFileBySuffix(zipName,FileConstants.SUFFIX_ZIP)){
//    //文件名称存在 但后缀名不是zip
//    zipName = zipName + FileConstants.SUFFIX_ZIP;
//   }else{
//    // 压缩包默认名称未6为随机字符串
//    zipName = StringUtils.isBlank(zipName) ? Utility.getRandomStrByNum(6)+FileConstants.SUFFIX_ZIP : zipName;
//   }
//   // 批量下载文件到指定位置
//   List<File> files = downloadMultipartFile(urlList,FileConstants.DOWNLOAD);
//   // 将文件打包
//   File zipFile = ZipFileUtil.compressFiles2Zip(files,FileConstants.DOWNLOAD+File.separator+zipName);
//   // 删除打包之前的文件
//   files.stream().forEach(f->f.delete());
//   return zipFile;
//  }catch (Exception e){
//   logger.error("批量下载文件异常",e);
//  }
//  return null;
// }

 /**
  * @Title: isFileBySuffix
  * @Description: 通过后缀名判断是否是某种文件
  * @Author: zte
  * @param: fileName 文件名称
  * @param: suffix 后缀名
  * @Date: 2019-02-19 10:09
  * @return: boolean
  * @throws:
  */
 public static boolean isFileBySuffix(String fileName,String suffix){
  if(StringUtils.isNoneBlank(fileName) && StringUtils.isNoneBlank(suffix)){
   return fileName.endsWith(suffix.toLowerCase()) || fileName.endsWith(suffix.toUpperCase());
  }
  return false;
 }
 /**
  * @Title: downloadByUrlPath
  * @Description: 下载网络文件
  * @Author: lxt
  * @param: urlPath
  * @param: saveDir
  * @param: fileName
  * @Date: 2019-02-23 16:26
  * @return: java.io.File
  * @throws:
  */
 public static File downloadByUrlPath(String urlPath,String saveDir,String fileName){
  if(StringUtils.isBlank(urlPath)){
   log.error("下载网络文件失败，链接为空");
   return null;
  }
  try (InputStream ins = new URL(urlPath).openStream()) {
   Path target = Paths.get(saveDir, fileName);
   Files.createDirectories(target.getParent());
   Files.copy(ins, target, StandardCopyOption.REPLACE_EXISTING);
   return new File(saveDir+File.separator+fileName);
  } catch (IOException e) {
   log.error("下载网络文件异常",e);
  }
  return null;
 }
// /**
//  * @Description: 上传视频文件
//  * @param file
//  * @param type
//  * @return: com.mbyte.easy.common.web.AjaxResult
//  * @Author: zte
//  * @Date: 2020/3/23 17:48
//  */
// public static AjaxResult uploadVideoFile(MultipartFile file,String type){
//  if(file!=null){
//   File partFile = null;
//   File compressFile = null;
//   try {
//    Map<String,String> result = new HashMap<>();
//    // 压缩视频
//    if(VideoDetailConstants.VIDEO_W_FLAG.equals(type)){
//     compressFile = FfmpegUtil.INSTANCE.compressFile2W(file);
//    }
//    if(VideoDetailConstants.VIDEO_H_FLAG.equals(type)){
//     compressFile = FfmpegUtil.INSTANCE.compressFile2H(file);
//    }
//    String fileUrlPath = null;
//    if(compressFile != null){
//     fileUrlPath = OssFileUtils.uploadSingleFile(compressFile);
//     // 剪辑视频
//     partFile = FfmpegUtil.INSTANCE.getPartVideo(compressFile);
//    }else{
//     fileUrlPath = OssFileUtils.uploadSingleFile(file);
//     // 剪辑视频
//     partFile = FfmpegUtil.INSTANCE.getPartVideo(file);
//    }
//    // 上传视频本身到oss
//    result.put("video",fileUrlPath);
//    // 上传试看部分到oss
//    result.put("videoPart", OssFileUtils.uploadSingleFile(partFile));
//    return AjaxResult.success(result);
//   }catch (Exception e){
//    log.error("上传视频异常",e);
//   }finally {
//    if(partFile != null && partFile.exists()){
//     partFile.delete();
//    }
//    if(compressFile != null && compressFile.exists()){
//     compressFile.delete();
//    }
//   }
//  }
//  return AjaxResult.error();
// }
}

3. 阿里云 对象云存储工具类 OssUtil.java

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClient;
import com.aliyun.oss.model.GetObjectRequest;
import com.aliyun.oss.model.OSSObject;
import com.mbyte.easy.properties.OssProerties;
import com.mbyte.easy.util.Utility;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateFormatUtils;
import org.apache.commons.lang3.time.DateUtils;
import org.apache.logging.log4j.util.Strings;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @ClassName: OSSUtill
 * @Description: 阿里云 对象云存储工具类
 * @Author: zte
 * @Date: 2019-02-13 14:38
 * @Version 1.0
 **/
@Slf4j
public class OssUtil {
 /**
  * 注入配置
  */
 private static OssProerties ossProerties;
 /**
  * @Title: initConfig
  * @Description: 配置初始化
  * @Author: lxt
  * @param: ossProertiesInit
  * @Date: 2019-02-14 09:25
  * @throws:
  */
 public static void initConfig(OssProerties ossProertiesInit){
  ossProerties = ossProertiesInit;
 }

 /**
  * @Title: generateKey
  * @Description: 生成oss对象名称
  * @Author: lxt
  * @param: fileName
  * @Date: 2019-02-13 15:21
  * @return: java.lang.String
  * @throws:
  */
 public static String generateKey(String fileName) {
  //对象名称格式：yyyymm.name.6位随机字符.ext
  return new StringBuilder(DateFormatUtils.format(new Date(), "yyyyMMddHHmmssSSS"))
    .append(".").append(Utility.getRandomStrByNum(6))
    .append(".").append(FilenameUtils.getExtension(fileName))
    .toString();
 }

 public static String getHttpsAddress(String url){
  return url.replaceAll("http://"+ossProerties.getBucket(),ossProerties.getSslNmae());
 }

 /**
  * @Title: upload
  * @Description: 上传方法
  * @Author: zte
  * @param: key 对象名称
  * @param: file待上传文件
  * @Date: 2019-02-13 15:35
  * @return: java.lang.String
  * @throws:
  */
 public static String upload(String key,File file) {
  if(file == null || !file.exists()){
   log.error("阿里云上传文件失败【"+file+"】不存在");
   return null;
  }
  log.info("阿里云上传文件开始：【"+file+"】");
  OSS ossClient = new OSSClient(ossProerties.getEndpoint(), ossProerties.getAccessKeyId(), ossProerties.getAccessKeySecret());
  try {
   ossClient.putObject(ossProerties.getBucketName(),key,file);
   //设置url过期时间
   Date expirationDate = DateUtils.addYears(new Date(), ossProerties.getExpiration());
   String url = ossClient.generatePresignedUrl(ossProerties.getBucketName(), key, expirationDate).toString();
   log.info("阿里云上传文件结束：【"+file+"】=>【"+url+"】");
   return getHttpsAddress(url);
  }catch(Exception e) {
   log.error("阿里云上传文件异常【"+file+"】",e);
  }finally {
   ossClient.shutdown();
  }
  return null;
 }
 /**
  * @Title: upload
  * @Description: 上传方法
  * @Author: zte
  * @param: key 对象名称
  * @param: file待上传文件
  * @Date: 2019-02-13 15:35
  * @return: java.lang.String
  * @throws:
  */
 public static String upload(String key,byte[] bytes) {
  if(bytes == null || StringUtils.isBlank(key)){
   log.error("阿里云上传文件不存在:【"+key+"】");
   return null;
  }
  log.info("阿里云上传文件开始:【"+key+"】");
  OSS ossClient = new OSSClient(ossProerties.getEndpoint(), ossProerties.getAccessKeyId(), ossProerties.getAccessKeySecret());
  try {
   ossClient.putObject(ossProerties.getBucketName(),key, new ByteArrayInputStream(bytes));
   //设置url过期时间
   Date expirationDate = DateUtils.addYears(new Date(), 100);
   String url = ossClient.generatePresignedUrl(ossProerties.getBucketName(), key, expirationDate).toString();
   log.info("阿里云上传文件结束：【"+key+"】=>【"+url+"】");
   return getHttpsAddress(url);
  }catch(Exception e) {
   log.error("阿里云上传文件异常:【"+key+"】",e);
  }finally {
   ossClient.shutdown();
  }
  return null;
 }
 /**
  * @Title: uploadWithObjectName
  * @Description: 上传方法，返回对象名称和 url
  * @Author: zte
  * @param: file待上传文件
  * @Date: 2019-02-13 15:35
  * @return: java.lang.Map<String,String>
  * @throws:
  */
 public static Map<String,String> uploadWithObjectName(File file) {
  if(file == null || !file.exists()){
   log.error("阿里云上传文件失败【"+file+"】不存在");
   return null;
  }
  Map<String,String> map = new HashMap<>();
  log.info("阿里云上传文件开始：【"+file+"】");
  OSS ossClient = new OSSClient(ossProerties.getEndpoint(), ossProerties.getAccessKeyId(), ossProerties.getAccessKeySecret());
  try {
   String key = generateKey(file.getName());

   ossClient.putObject(ossProerties.getBucketName(),key, new FileInputStream(file));
   //设置url过期时间
   Date expirationDate = DateUtils.addYears(new Date(), ossProerties.getExpiration());
   String url = ossClient.generatePresignedUrl(ossProerties.getBucketName(), key, expirationDate).toString();
   log.info("阿里云上传文件结束：【"+file+"】=>【"+url+"】");
   map.put("objectName",key);
   map.put("url",url);
   return map;
  }catch(Exception e) {
   log.error("阿里云上传文件异常【"+file+"】",e);
  }finally {
   ossClient.shutdown();
  }
  return null;
 }
 /**
  * @Title: delete
  * @Description: 删除方法
  * @Author: zte
  * @param: url 待删除对象url
  * @Date: 2019-02-13 15:54
  * @throws:
  */
 public static void delete(String url) {
  if(StringUtils.isBlank(url)){
   log.error("阿里云删除文件失败，对象url为空");
   return;
  }
  log.info("阿里云删除文件开始：【"+url+"】");
  if(url.contains(ossProerties.getBucket())){
   //根据url获取对象名称
   url = getObjectNameByUrl(url);
  }
  OSS ossClient = new OSSClient(ossProerties.getEndpoint(), ossProerties.getAccessKeyId(), ossProerties.getAccessKeySecret());
  try {
   // 删除文件
   ossClient.deleteObject(ossProerties.getBucketName(), url);
   log.info("阿里云删除文件结束：【"+url+"】");
  }catch(Exception e) {
   log.error("阿里云删除文件异常【"+url+"】",e);
  }finally {
   ossClient.shutdown();
  }
 }
 /**
  * @Title: download
  * @Description: 下载文件到本地文件
  * @Author: zte
  * @param: url 待下载对象url
  * @param: filePath 下载到本地文件
  * @Date: 2019-02-13 15:56
  * @return: java.io.File
  * @throws:
  */
 public static File download2File(String url, String filePath) {
  log.info("阿里云下载文件开始：【"+url+"】");
  if(url.contains(ossProerties.getBucket())){
   //根据url获取对象名称
   url = getObjectNameByUrl(url);
  }
  OSS ossClient = new OSSClient(ossProerties.getEndpoint(), ossProerties.getAccessKeyId(), ossProerties.getAccessKeySecret());
  try {
   File file = new File(filePath);
   // 下载OSS文件到本地文件。如果指定的本地文件存在会覆盖，不存在则新建。
   ossClient.getObject(new GetObjectRequest(ossProerties.getBucketName(), url),file);
   log.info("阿里云下载文件结束：【"+url+"】");
   return file;
  }catch(Exception e) {
   log.error("阿里云下载文件异常【"+url+"】",e);
  }finally {
   ossClient.shutdown();
  }
  return null;
 }
 /**
  * @Title: download
  * @Description: 通过流下载文件
  * @Author: zte
  * @param: url 待下载对象url
  * @param: filePath 下载到本地文件
  * @Date: 2019-02-13 15:56
  * @return: java.io.File
  * @throws:
  */
 public static void download2FileByStream(String url, String fileName, HttpServletResponse response) {
  BufferedInputStream inputStream = null;
  OSS ossClient = new OSSClient(ossProerties.getEndpoint(), ossProerties.getAccessKeyId(), ossProerties.getAccessKeySecret());
  try(
    BufferedOutputStream outputStream = new BufferedOutputStream(response.getOutputStream());){
   // 配置文件下载
   response.setHeader("content-type", "application/octet-stream");
   response.setContentType("application/octet-stream");
   if(url.contains(ossProerties.getBucket())){
    //根据url获取对象名称
    url = getObjectNameByUrl(url);
   }
   // 下载文件能正常显示中文
   response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(StringUtils.isBlank(fileName) ? url : fileName, "UTF-8"));
   log.info("阿里云下载文件开始：【"+url+"】");
   // ossObject包含文件所在的存储空间名称、文件名称、文件元信息以及一个输入流。
   OSSObject ossObject = ossClient.getObject(ossProerties.getBucketName(), url);
   inputStream = new BufferedInputStream(ossObject.getObjectContent());
   byte[] buff = new byte[2048];
   int bytesRead;
   while (-1 != (bytesRead = inputStream.read(buff, 0, buff.length))){
    outputStream.write(buff, 0, bytesRead);
   }
   outputStream.flush();
  } catch (Exception e) {
   log.error("下载异常！", e);
  }finally {
   log.info("阿里云下载文件结束：【"+url+"】");
   ossClient.shutdown();
   if(inputStream != null){
    try {
     inputStream.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   }
  }
 }
 /**
  * @Title: download
  * @Description: 下载文件到指定目录,文件名称为阿里云文件对象名称
  * @Author: zte
  * @param: url 待下载对象url
  * @param: dir 下载到本地目录
  * @Date: 2019-02-13 15:56
  * @return: java.io.File
  * @throws:
  */
 public static File download2Dir(String url, String dir) {
  log.info("阿里云下载文件开始：【"+url+"】");
  if(url.contains(ossProerties.getBucket())){
   //根据url获取对象名称
   url = getObjectNameByUrl(url);
  }
  OSS ossClient = new OSSClient(ossProerties.getEndpoint(), ossProerties.getAccessKeyId(), ossProerties.getAccessKeySecret());
  try {
   File file = new File(dir+File.separator+url);
   // 下载OSS文件到本地文件。如果指定的本地文件存在会覆盖，不存在则新建。
   ossClient.getObject(new GetObjectRequest(ossProerties.getBucketName(), url),file);
   log.info("阿里云下载文件结束：【"+url+"】");
   return file;
  }catch(Exception e) {
   log.error("阿里云下载文件异常【"+url+"】",e);
  }finally {
   ossClient.shutdown();
  }
  return null;
 }
 /*
  * @Title: getObjectNameByUrl
  * @Description: 通过url获取对象名称
  * @Author: lxt
  * @param: url
  * @Date: 2019-02-13 16:20
  * @return: java.lang.String
  * @throws:
  */
 public static String getObjectNameByUrl(String url){
  if(StringUtils.isBlank(url)){
   return null;
  }
  return url.substring(url.indexOf(ossProerties.getBucket())+ossProerties.getBucket().length()+1,url.indexOf("?"));
 }

 /**
  * @author: zte
  * @description: 重载方法,根据file生成文件名称并且上传文件到阿里云
  * @date: 2019/9/21 10:56
  * @param file : MultipartFile文件
  * @see #upload(String,byte[])
  * @return 数据库中要存入的路径
  */
 public static String upload(MultipartFile file) throws IOException {
  if (file == null || Strings.isEmpty(file.getOriginalFilename())){
   return null;
  }
  return upload(generateKey(file.getOriginalFilename()), file.getBytes());
 }

 /**
  * 调用浏览器下载
  * @param url
  * @param response
  */
 public static void download2FileByStream(String url,HttpServletResponse response,String name) {

  File file = new File(url);
  String fileName=file.getName();
  fileName= StringUtils.substringBefore(fileName,"?");
  String fileLast=StringUtils.substringAfterLast(fileName,".");

  fileName=name+"."+fileLast;

  BufferedInputStream inputStream = null;
  OSS ossClient = new OSSClient(ossProerties.getEndpoint(), ossProerties.getAccessKeyId(), ossProerties.getAccessKeySecret());
  try(

    BufferedOutputStream outputStream = new BufferedOutputStream(response.getOutputStream());){
   // 配置文件下载
   response.setHeader("content-type", "application/octet-stream");
   response.setContentType("application/octet-stream");
   if(url.contains(ossProerties.getBucket())){
    //根据url获取对象名称
    url = getObjectNameByUrl(url);
   }
   // 下载文件能正常显示中文
   response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(StringUtils.isBlank(fileName) ? url : fileName, "UTF-8"));
   log.info("阿里云下载文件开始：【"+url+"】");
   // ossObject包含文件所在的存储空间名称、文件名称、文件元信息以及一个输入流。
   OSSObject ossObject = ossClient.getObject(ossProerties.getBucketName(), url);
   inputStream = new BufferedInputStream(ossObject.getObjectContent());
   byte[] buff = new byte[2048];
   int bytesRead;
   while (-1 != (bytesRead = inputStream.read(buff, 0, buff.length))){
    outputStream.write(buff, 0, bytesRead);
   }
   outputStream.flush();
  } catch (Exception e) {
   log.error("下载异常！", e);
  }finally {
   log.info("阿里云下载文件结束：【"+url+"】");
   ossClient.shutdown();
   if(inputStream != null){
    try {
     inputStream.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   }
  }
 }
}

5. controller 调用样例

我这里使用的是我自己项目封装的 AjaxResult工具类，大家可以使用Map,通过这个方法呢，我们就可以使用oss将图片保存，并且返回前端图片的保存地址(可以访问)。

/**
  * 上传
  * @param fileupload
  * @return
  */
 @PostMapping("uploadImg")
 @ResponseBody
 public AjaxResult uploadImg(MultipartFile fileupload){
  if(fileupload != null){
   String path = OssFileUtils.uploadSingleFile(fileupload);
   return AjaxResult.success(path);
  }else {
   return AjaxResult.error();
  }

 }

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