从给定的内容类型返回字符集。
/**nowjava.com**/ /******************************************************************************* * Copyright (c) 2008 Red Hat, Inc. * Distributed under license by Red Hat, Inc. All rights reserved. * This program is made available under the terms of the * Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Xavier Coulon - Initial API and implementation ******************************************************************************/ //package com.nowjava; import java.nio.charset.Charset; import java.nio.charset.UnsupportedCharsetException; import java.util.StringTokenizer; public class Main { /** * Returns the {@link Charset} from the given content-type. * * @param contentType * the given content type that may contain some ";charset=...". * @param defaultCharsetName * the name of the default charset to return in case when the given * contentType would be null or would not contain any specific * charset. If this name cannot be resolved into a valid charset, then "UTF-8" is used. * @return the value of the "charset" token in the given contentType, or * the given defaultCharsetName, or "UTF-8" as a last resort. */ public static Charset getContentCharSet(final String contentType, final String defaultCharsetName) { if (contentType != null) { final StringTokenizer stk = new StringTokenizer(contentType, ";"); while (stk.hasMoreTokens()) {//from NowJava.com final String token = stk.nextToken().toLowerCase() .replace(" ", ""); if (token.startsWith("charset=")) { final StringTokenizer tokenSplitter = new StringTokenizer( token, "="); tokenSplitter.nextToken(); // skip the 'charset' part as we already know it final String value = tokenSplitter.hasMoreTokens() ? tokenSplitter