diff --git a/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/oss/OssBootUtil.java b/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/oss/OssBootUtil.java
index 605a16d3..3b2e194c 100644
--- a/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/oss/OssBootUtil.java
+++ b/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/oss/OssBootUtil.java
@@ -15,6 +15,7 @@ import com.jero.common.util.oConvertUtils;
 import org.springframework.web.multipart.MultipartFile;
 
 import java.io.BufferedInputStream;
+import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
@@ -102,7 +103,7 @@ public class OssBootUtil {
      * @return oss 中的相对文件路径
      */
     public static String upload(MultipartFile file, String fileDir,String customBucket) {
-        String FILE_URL = null;
+        String url;
         initOSS(endPoint, accessKeyId, accessKeySecret);
         StringBuilder fileUrl = new StringBuilder();
         String newBucket = bucketName;
@@ -123,21 +124,21 @@ public class OssBootUtil {
             FileTypeFilter.fileTypeFilter(file);
             //update-end-author:liusq date:20210809 for: 过滤上传文件类型
             orgName = CommonUtils.getFileName(orgName);
-            String fileName = orgName.indexOf(".")==-1
+            String fileName = !orgName.contains(".")
                     ?orgName + "_" + System.currentTimeMillis()
                     :orgName.substring(0, orgName.lastIndexOf(".")) + "_" + System.currentTimeMillis() + orgName.substring(orgName.lastIndexOf("."));
             if (!fileDir.endsWith("/")) {
                 fileDir = fileDir.concat("/");
             }
             //update-begin-author:wangshuai date:20201012 for: 过滤上传文件夹名特殊字符，防止攻击
-            fileDir=StrAttackFilter.filter(fileDir);
+            fileDir = StrAttackFilter.filter(fileDir);
             //update-end-author:wangshuai date:20201012 for: 过滤上传文件夹名特殊字符，防止攻击
-            fileUrl = fileUrl.append(fileDir + fileName);
+            fileUrl.append(fileDir).append(fileName);
 
             if (oConvertUtils.isNotEmpty(staticDomain) && staticDomain.toLowerCase().startsWith("http")) {
-                FILE_URL = staticDomain + "/" + fileUrl;
+                url = staticDomain + File.separator + fileUrl;
             } else {
-                FILE_URL = HTTPS_CONSTANT + newBucket + "." + endPoint + "/" + fileUrl;
+                url = HTTPS_CONSTANT + newBucket + "." + endPoint + File.separator + fileUrl;
             }
             PutObjectResult result = ossClient.putObject(newBucket, fileUrl.toString(), file.getInputStream());
             // 设置权限(公开读)
@@ -145,14 +146,11 @@ public class OssBootUtil {
             if (result != null) {
                 log.info(OSS_UPLOAD_CONSTANT + fileUrl);
             }
-        } catch (IOException e) {
-            e.printStackTrace();
-            return null;
-        }catch (Exception e) {
+        } catch (Exception e) {
             e.printStackTrace();
             return null;
         }
-        return FILE_URL;
+        return url;
     }
 
     /**
@@ -188,7 +186,7 @@ public class OssBootUtil {
      * @return oss 中的相对文件路径
      */
     public static String upload(FileItemStream file, String fileDir) {
-        String FILE_URL = null;
+        String url;
         initOSS(endPoint, accessKeyId, accessKeySecret);
         StringBuilder fileUrl = new StringBuilder();
         try {
@@ -198,11 +196,11 @@ public class OssBootUtil {
                 fileDir = fileDir.concat("/");
             }
             fileDir = StrAttackFilter.filter(fileDir);
-            fileUrl = fileUrl.append(fileDir + fileName);
+            fileUrl.append(fileDir).append(fileName);
             if (oConvertUtils.isNotEmpty(staticDomain) && staticDomain.toLowerCase().startsWith("http")) {
-                FILE_URL = staticDomain + "/" + fileUrl;
+                url = staticDomain + File.separator + fileUrl;
             } else {
-                FILE_URL = HTTPS_CONSTANT + bucketName + "." + endPoint + "/" + fileUrl;
+                url = HTTPS_CONSTANT + bucketName + "." + endPoint + File.separator + fileUrl;
             }
             PutObjectResult result = ossClient.putObject(bucketName, fileUrl.toString(), file.openStream());
             // 设置权限(公开读)
@@ -214,7 +212,7 @@ public class OssBootUtil {
             e.printStackTrace();
             return null;
         }
-        return FILE_URL;
+        return url;
     }
 
     /**
@@ -325,21 +323,21 @@ public class OssBootUtil {
      * @return
      */
     public static String upload(InputStream stream, String relativePath) {
-        String FILE_URL = null;
+        String url;
         String fileUrl = relativePath;
         initOSS(endPoint, accessKeyId, accessKeySecret);
         if (oConvertUtils.isNotEmpty(staticDomain) && staticDomain.toLowerCase().startsWith("http")) {
-            FILE_URL = staticDomain + "/" + relativePath;
+            url = staticDomain + File.separator + relativePath;
         } else {
-            FILE_URL = HTTPS_CONSTANT + bucketName + "." + endPoint + "/" + fileUrl;
+            url = HTTPS_CONSTANT + bucketName + "." + endPoint + File.separator + fileUrl;
         }
-        PutObjectResult result = ossClient.putObject(bucketName, fileUrl.toString(),stream);
+        PutObjectResult result = ossClient.putObject(bucketName, fileUrl,stream);
         // 设置权限(公开读)
         ossClient.setBucketAcl(bucketName, CannedAccessControlList.PublicRead);
         if (result != null) {
             log.info(OSS_UPLOAD_CONSTANT + fileUrl);
         }
-        return FILE_URL;
+        return url;
     }