最近做项目的时候需要存储静态图片，但是有一个问题，我们的前台系统和后台系统采用Maven继承的方式实现，即前台系统web和后台系统mgr都依赖一个名为base的jar包，那么前后台系统的图片上传共享就出现了问题，开始我们在阿里云上搭建了一个FTP服务器，但不幸的是，我们的小程序不支持FTP的访问（表示很纳闷），所以就选择了阿里云的OSS存储，由于工期较紧所以就把上传的任务放在了服务器上，其实更好的方案是在客户端中上传，服务器只负责保存文件名。我在此小记，希望可以帮助到您。

阿里云OSS云存简单使用步骤

1. 开通OSS服务，并获取到如下信息：

   • ENDPOINT：访问的域名
   • ACCESSKEYID：键ID
   • ACCESSKEYSECRET：键密钥
   • BUCKETNAME：可选状态，只要权限够可以使用代码创建；

2. 添加配置文件,把上面的信息配置在配置文件中，不多说

3. 添加jar依赖，可以去OSS官网下载aliyun_java_sdk_yyyyMMdd.zip，其中也有各种源码文档资料示例等，如果你的项目使用Maven构建则可以使用如下Maven依赖：

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

4. 编写一个工具类专门处理OSS文件上传，我的文件如下：

   import java.io.File;
   import java.util.Iterator;
   import java.util.Map;
   import com.aliyun.oss.ClientException;
   import com.aliyun.oss.OSSClient;
   import com.aliyun.oss.OSSException;
   import com.aliyun.oss.model.CannedAccessControlList;
   import com.aliyun.oss.model.CreateBucketRequest;
   import com.aliyun.oss.model.PutObjectRequest;
   import lombok.extern.slf4j.Slf4j;
   
   @Slf4j
   public class OSSUtil {  
       public static final String OSS_ENDPOINT = "OSS_ENDPOINT";
       public static final String OSS_ACCESSKEYID = "OSS_ACCESSKEYID";
       public static final String OSS_ACCESSKEYSECRET = "OSS_ACCESSKEYSECRET";
       public static final String OSS_BUCKETNAME = "OSS_BUCKETNAME";
   
       public static String endpoint = PropertiesUtil.getProperty(OSS_ENDPOINT);
       public static String accesskeyId = PropertiesUtil.getProperty(OSS_ACCESSKEYID);
       public static String accesskeySecret = PropertiesUtil.getProperty(OSS_ACCESSKEYSECRET);
       public static String bucketName = PropertiesUtil.getProperty(OSS_BUCKETNAME);
   
       public static boolean uploadFile2OSS(Map<String, File> filesMap) {
           OSSClient ossClient = new OSSClient(endpoint, accesskeyId, accesskeySecret);
           try {
               if (!ossClient.doesBucketExist(bucketName)) {
                   System.out.println("Creating bucket " + bucketName + "\n");
                   ossClient.createBucket(bucketName);
                   CreateBucketRequest createBucketRequest= new CreateBucketRequest(bucketName);
                   createBucketRequest.setCannedACL(CannedAccessControlList.PublicRead);
                   ossClient.createBucket(createBucketRequest);
               }
               log.info("#####################################开始上传...\n");
               Iterator<String> iterator = filesMap.keySet().iterator();
               while (iterator.hasNext()) {
                   String filename = iterator.next();
                   ossClient.putObject(new PutObjectRequest(bucketName, filename, filesMap.get(filename)));
               }
               log.info("#####################################上传完成\n");
               return true;
           } catch (OSSException oe) {
               log.error("Caught an OSSException, which means your request made it to OSS, but was rejected with an error response for some reason.");
               log.error("Error Message: " + oe.getErrorCode());
               log.error("Error Code: " + oe.getErrorCode());
               log.error("Request ID: " + oe.getRequestId());
               log.error("Host ID: " + oe.getHostId());
               return false;
           } catch (ClientException ce) {
               log.error("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.");
               log.error("Error Message: " + ce.getMessage());
               return false;
           } finally {
               ossClient.shutdown();
           }
       }
   }
   
   

5. 在需要的地方调用工具类的方法即可如下：

   // 上传文件到OSS
   Map<String, File> fileMap = Maps.newHashMap();
   fileMap.put(filename, imgFile);
   fileMap.put(thumbnailName, thumbnailFile);
   boolean success = OSSUtil.uploadFile2OSS(fileMap);
   if (!success) {
       return ServerResponse.createErrorWithMessage("上传到OSS失败");
   }