diff --git a/src/main/java/cn/chjyj/szwh/utils/SzFileUtils.java b/src/main/java/cn/chjyj/szwh/utils/SzFileUtils.java
index 3cf53dc..f99f702 100644
--- a/src/main/java/cn/chjyj/szwh/utils/SzFileUtils.java
+++ b/src/main/java/cn/chjyj/szwh/utils/SzFileUtils.java
@@ -45,7 +45,7 @@ public class SzFileUtils {
      */
     public static String fileSizeFormat(Long tfilesize){
         String out="0b";
-        //long fileSize = tfilesize - 1;
+        //获取到浮点型数据
         float fileSize = tfilesize.floatValue();
         //TB
         if(fileSize>1099511627776l) {
@@ -53,17 +53,17 @@ public class SzFileUtils {
             out =String.format("%.2f", f)+"TB";
         }
         //GB
-        if(fileSize>1073741824l) {
-            float f = fileSize/1073741824;
+        if(fileSize>1073741824l && fileSize<1099511627776l) {
+            float f = fileSize/1073741824l;
             out =String.format("%.2f", f)+"GB";
         }
         //MB
-        if(fileSize>1048576){
+        if(fileSize>1048576l && fileSize<1073741824l){
             float f = fileSize/1048576;
             out = String.format("%.2f",f)+"MB";
         }
         //KB
-        if(fileSize>1024){
+        if(fileSize>1024l && fileSize<1048576l){
             float f = fileSize/1024;
             out = String.format("%.2f",f)+"KB";
         }