fix: 大写下滑下列名转驼峰问题

修改前: CREATE_TIME -> cREATETIME
修改后: CREATE_TIME -> createTime

Author: Nisus-Liu

generator-web/src/main/java/com/softdev/system/generator/util/StringUtils.java

@@ -47,7 +47,7 @@ public static String underlineToCamelCase(String underscoreName) {
                         result.append(Character.toUpperCase(ch));
                         flag = false;
                     } else {
-                        result.append(ch);
+                        result.append(Character.toLowerCase(ch));
                     }
                 }
             }

generator-web/src/test/java/FooTest.java

@@ -19,6 +19,8 @@ public static void main(String[] args) {
         System.out.println(StringUtils.toUnderline("UserName",true));
         System.out.println(StringUtils.toUnderline("user_NameGgg_x-UUU",true));
         System.out.println(StringUtils.toUnderline("username",true));
+
+        System.out.println(StringUtils.underlineToCamelCase("CREATE_TIME"));
     }