尝试修复路径遍历的问题

service-manager/src/main/java/com/winsun/controller/PackageController.java

@@ -185,18 +185,18 @@ public class PackageController extends BaseController {
 
 
     @Permission(menuname = "上传背景图", value = "backgroundUpload", method = RequestMethod.POST)
-    public ResponseData<String> backgroundUpload(@RequestParam(value = "file") MultipartFile file, @RequestParam(value = "id", required = false) String id) {
+    public ResponseData<String> backgroundUpload(@RequestParam(value = "file") MultipartFile file, @RequestParam(value = "id", required = false) int id) {
         String subfix = "";
         String backgroundpath = FilePath.BACKGROUNDIMG.getValue() + "/" + DEFAULTPATH + "/";
-        if (StringUtils.isBlank(id)) {
+        if (id < 1) {
             EntityWrapper<Package> packagewrapper = new EntityWrapper<>();
             packagewrapper.setSqlSelect("max(id) as id");
             List<Map<String, Object>> selectMaps = packageMapper.selectMaps(packagewrapper);
-            id = selectMaps.get(0).get("id").toString();
-            Integer fileid = Integer.valueOf(id) + 1;
+            id = Integer.parseInt(selectMaps.get(0).get("id").toString());
+            Integer fileid = id + 1;
             subfix = fileid.toString();
         } else {
-            subfix = id;
+            subfix = String.valueOf(id);
         }
         backgroundpath = backgroundpath + subfix.replace(".", "").
                 replace("/", "").replace("\\", "");