diff --git a/src/main/java/im/zhaojun/common/util/FileComparator.java b/src/main/java/im/zhaojun/common/util/FileComparator.java
index 0cf097a..ddc1898 100644
--- a/src/main/java/im/zhaojun/common/util/FileComparator.java
+++ b/src/main/java/im/zhaojun/common/util/FileComparator.java
@@ -37,16 +37,15 @@ public class FileComparator implements Comparator<FileItemDTO> {
         if (order == null) {
             order = "asc";
         }
-
         FileTypeEnum o1Type = o1.getType();
         FileTypeEnum o2Type = o2.getType();
-
+        NaturalOrderComparator naturalOrderComparator = new NaturalOrderComparator();
         if (o1Type.equals(o2Type)) {
             int result;
             switch (sortBy) {
                 case "time": result = o1.getTime().compareTo(o2.getTime()); break;
                 case "size": result = o1.getSize().compareTo(o2.getSize()); break;
-                default: result = o1.getName().compareToIgnoreCase(o2.getName()); break;
+                default: result = naturalOrderComparator.compare(o1.getName(), o2.getName()); break;
             }
             return "asc".equals(order) ? result : -result;
         }
@@ -57,4 +56,4 @@ public class FileComparator implements Comparator<FileItemDTO> {
             return 1;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/main/java/im/zhaojun/common/util/NaturalOrderComparator.java b/src/main/java/im/zhaojun/common/util/NaturalOrderComparator.java
new file mode 100644
index 0000000..2de33da
--- /dev/null
+++ b/src/main/java/im/zhaojun/common/util/NaturalOrderComparator.java
@@ -0,0 +1,142 @@
+package im.zhaojun.common.util;
+/*
+ NaturalOrderComparator.java -- Perform 'natural order' comparisons of strings in Java.
+ Copyright (C) 2003 by Pierre-Luc Paour <natorder@paour.com>
+
+ Based on the C version by Martin Pool, of which this is more or less a straight conversion.
+ Copyright (C) 2000 by Martin Pool <mbp@humbug.org.au>
+
+ This software is provided 'as-is', without any express or implied
+ warranty.  In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+ */
+
+import java.util.*;
+
+public class NaturalOrderComparator implements Comparator<String> {
+
+    private int compareRight(String a, String b) {
+        int bias = 0, ia = 0, ib = 0;
+
+        // The longest run of digits wins. That aside, the greatest
+        // value wins, but we can't know that it will until we've scanned
+        // both numbers to know that they have the same magnitude, so we
+        // remember it in BIAS.
+        for (; ; ia++, ib++) {
+            char ca = charAt(a, ia);
+            char cb = charAt(b, ib);
+
+            if (!isDigit(ca) && !isDigit(cb)) {
+                return bias;
+            }
+            if (!isDigit(ca)) {
+                return -1;
+            }
+            if (!isDigit(cb)) {
+                return +1;
+            }
+            if (ca == 0 && cb == 0) {
+                return bias;
+            }
+
+            if (bias == 0) {
+                if (ca < cb) {
+                    bias = -1;
+                } else if (ca > cb) {
+                    bias = +1;
+                }
+            }
+        }
+    }
+
+    public int compare(String a, String b) {
+        int ia = 0, ib = 0;
+        int nza = 0, nzb = 0;
+        char ca, cb;
+
+        while (true) {
+            // Only count the number of zeroes leading the last number compared
+            nza = nzb = 0;
+
+            ca = charAt(a, ia);
+            cb = charAt(b, ib);
+
+            // skip over leading spaces or zeros
+            while (Character.isSpaceChar(ca) || ca == '0') {
+                if (ca == '0') {
+                    nza++;
+                } else {
+                    // Only count consecutive zeroes
+                    nza = 0;
+                }
+
+                ca = charAt(a, ++ia);
+            }
+
+            while (Character.isSpaceChar(cb) || cb == '0') {
+                if (cb == '0') {
+                    nzb++;
+                } else {
+                    // Only count consecutive zeroes
+                    nzb = 0;
+                }
+
+                cb = charAt(b, ++ib);
+            }
+
+            // Process run of digits
+            if (Character.isDigit(ca) && Character.isDigit(cb)) {
+                int bias = compareRight(a.substring(ia), b.substring(ib));
+                if (bias != 0) {
+                    return bias;
+                }
+            }
+
+            if (ca == 0 && cb == 0) {
+                // The strings compare the same. Perhaps the caller
+                // will want to call strcmp to break the tie.
+                return compareEqual(a, b, nza, nzb);
+            }
+            if (ca < cb) {
+                return -1;
+            }
+            if (ca > cb) {
+                return +1;
+            }
+
+            ++ia;
+            ++ib;
+        }
+    }
+
+    private static boolean isDigit(char c) {
+        return Character.isDigit(c) || c == '.' || c == ',';
+    }
+
+    private static char charAt(String s, int i) {
+        return i >= s.length() ? 0 : s.charAt(i);
+    }
+
+    private static int compareEqual(String a, String b, int nza, int nzb) {
+        if (nza - nzb != 0)
+            return nza - nzb;
+
+        if (a.length() == b.length())
+            return a.compareTo(b);
+
+        return a.length() - b.length();
+    }
+
+}