增加oss删除文件方法。

picc-common/src/main/java/com/jpsoft/picc/modules/common/utils/OSSUtil.java

@@ -67,7 +67,7 @@ public class OSSUtil {
         return ossConfig.getUrlPrefix() + "/" + retFileUrl;
     }
 
-    public boolean deleteFile(OSSConfig ossConfig,String filePath) {
+    public static boolean deleteFile(OSSConfig ossConfig,String filePath) {
         OSS ossClient = new OSSClientBuilder().build(ossConfig.getEndpoint(), ossConfig.getAccessKeyId(), ossConfig.getAccessKeySecret());
 
         boolean exist = ossClient.doesObjectExist(ossConfig.getBucketName(), filePath);