Excel导出功能

yzg-util-base/src/main/java/com/yanzuoguang/util/helper/StringHelper.java

@@ -14,6 +14,7 @@ import java.util.UUID;
 
 /**
  * 字符串帮主类
+ *
  * @author 颜佐光
  */
 public class StringHelper {
@@ -748,23 +749,22 @@ public class StringHelper {
      * @return 加密后的字符串
      */
     public static String md5(String string) {
-        byte[] hash = null;
         try {
-            hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8"));
+            byte[] hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8"));
+            StringBuilder hex = new StringBuilder(hash.length * 2);
+            for (byte b : hash) {
+                if ((b & 0xFF) < 0x10) {
+                    hex.append("0");
+                }
+                hex.append(Integer.toHexString(b & 0xFF));
+            }
+            return hex.toString();
         } catch (NoSuchAlgorithmException e) {
             e.printStackTrace();
         } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
         }
-
-        StringBuilder hex = new StringBuilder(hash.length * 2);
-        for (byte b : hash) {
-            if ((b & 0xFF) < 0x10) {
-                hex.append("0");
-            }
-            hex.append(Integer.toHexString(b & 0xFF));
-        }
-        return hex.toString();
+        return StringHelper.EMPTY;
     }
 
     /**