/**
* Copyright (c) 2011-2012, James Zhan 詹波 (jfinal@126.com).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jfinal.util;
/**
* StringKit.
*/
public class StringKit {
/**
* 首字母变小写
*/
public static String firstCharToLowerCase(String str) {
Character firstChar = str.charAt(0);
String tail = str.substring(1);
str = Character.toLowerCase(firstChar) + tail;
return str;
}
/**
* 首字母变大写
*/
public static String firstCharToUpperCase(String str) {
Character firstChar = str.charAt(0);
String tail = str.substring(1);
str = Character.toUpperCase(firstChar) + tail;
return str;
}
/**
* 字符串为 null 或者为 "" 时返回 true
*/
public static boolean isBlank(String str) {
return str == null || "".equals(str.trim()) ? true : false;
}
/**
* 字符串不为 null 而且不为 "" 时返回 true
*/
public static boolean notBlank(String str) {
return str == null || "".equals(str.trim()) ? false : true;
}
public static boolean notBlank(String... strings) {
if (strings == null)
return false;
for (String str : strings)
if (str == null || "".equals(str.trim()))
return false;
return true;
}
public static boolean notNull(Object... paras) {
if (paras == null)
return false;
for (Object obj : paras)
if (obj == null)
return false;
return true;
}
}