View Javadoc

1   /*
2    * Copyright 2004-2009 the Seasar Foundation and the Others.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13   * either express or implied. See the License for the specific language
14   * governing permissions and limitations under the License.
15   */
16  package org.seasar.cubby.admin.servlet;
17  
18  class StringUtils {
19  
20  	/**
21  	 * 文字列を置き換えます。
22  	 * 
23  	 * @param text
24  	 *            テキスト
25  	 * @param fromText
26  	 *            置き換え対象のテキスト
27  	 * @param toText
28  	 *            置き換えるテキスト
29  	 * @return 結果
30  	 */
31  	public static final String replace(final String text,
32  			final String fromText, final String toText) {
33  
34  		if (text == null || fromText == null || toText == null) {
35  			return null;
36  		}
37  		final StringBuilder builder = new StringBuilder(100);
38  		int pos = 0;
39  		int pos2 = 0;
40  		while (true) {
41  			pos = text.indexOf(fromText, pos2);
42  			if (pos == 0) {
43  				builder.append(toText);
44  				pos2 = fromText.length();
45  			} else if (pos > 0) {
46  				builder.append(text.substring(pos2, pos));
47  				builder.append(toText);
48  				pos2 = pos + fromText.length();
49  			} else {
50  				builder.append(text.substring(pos2));
51  				break;
52  			}
53  		}
54  		return builder.toString();
55  	}
56  
57  }