Mega Code Archive
Check whether the given String contains any whitespace characters
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/*
* Copyright 2002-2007 the original author or authors.
*
* 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 jacky.lanlan.song.extension.struts.util;
/**
* Miscellaneous {@link String} utility methods.
*
* <p>Mainly for internal use within the framework; consider
* <a href="http://jakarta.apache.org/commons/lang/">Jakarta's Commons Lang</a>
* for a more comprehensive suite of
* {@link org.apache.commons.lang.StringUtils String utilities}.
*
* <p>This class delivers some simple functionality that should really
* be provided by the core Java <code>String</code> and {@link StringBuffer}
* classes, such as the ability to {@link #replace} all occurrences of a given
* substring in a target string. It also provides easy-to-use methods to
* convert between delimited strings, such as CSV strings, and collections and
* arrays.
*
* @author Rod Johnson
* @author Juergen Hoeller
* @author Keith Donald
* @author Rob Harrop
* @author Rick Evans
* @author Jacky.Song
* @since 16 April 2001
*/
abstract class StringUtils {
/**
* Check whether the given String contains any whitespace characters.
* @param str the String to check (may be <code>null</code>)
* @return <code>true</code> if the String is not empty and
* contains at least 1 whitespace character
* @see java.lang.Character#isWhitespace
*/
public static boolean containsWhitespace(String str) {
if (!hasLength(str)) {
return false;
}
int strLen = str.length();
for (int i = 0; i < strLen; i++) {
if (Character.isWhitespace(str.charAt(i))) {
return true;
}
}
return false;
}
/**
* Check that the given String is neither <code>null</code> nor of length 0.
* Note: Will return <code>true</code> for a String that purely consists of whitespace.
* <p><pre>
* StringUtils.hasLength(null) = false
* StringUtils.hasLength("") = false
* StringUtils.hasLength(" ") = true
* StringUtils.hasLength("Hello") = true
* </pre>
* @param str the String to check (may be <code>null</code>)
* @return <code>true</code> if the String is not null and has length
* @see #hasText(String)
*/
public static boolean hasLength(String str) {
return (str != null && str.length() > 0);
}
}
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