Java tutorial
/* * Copyright 2009-2011 the Stormcat Project. * * 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 org.stormcat.jvbeans.common.lang; import java.io.UnsupportedEncodingException; import org.apache.commons.lang.StringUtils; import org.stormcat.jvbeans.common.constants.Charset; import org.stormcat.jvbeans.common.exception.IORuntimeException; /** * @author a.yamada * */ public class StringUtil extends StringUtils { protected StringUtil() { } public static int getBytesLength(String target) { if (target == null) { return 0; } return target.getBytes().length; } public static int getBytesLength(String target, Charset charset) { if (target == null) { return 0; } try { return target.getBytes(charset.getValue()).length; } catch (UnsupportedEncodingException e) { throw new IORuntimeException(e); } } public static byte[] getBytes(String target, Charset charset) { try { return target.getBytes(charset.getValue()); } catch (UnsupportedEncodingException e) { throw new IORuntimeException(e); } } public static String getString(byte[] target, Charset charset) { try { return new String(target, charset.getValue()); } catch (UnsupportedEncodingException e) { throw new IORuntimeException(e); } } public static String toZenkuakuNum(int target) { StringBuilder builder = new StringBuilder(); String s = String.valueOf(target); char[] array = s.toCharArray(); for (int i = 0; i < array.length; i++) { builder.append((char)(array[i] - '0' + '?')); } return builder.toString(); } }