eXtremeComponents的中文的问题，目前知道的就是导出使用中文文件名的乱码问题，eXtremeComponents已经默认使用UTF来导出XLS，也已经给出了PDF导出的解决方案：
最新eXtremeComponents包：支持 PDF中文导出
网友seno指出可以参照SpringSide的解决方案，对文件名进行toUtf8编码。不过，在我自己实际应用中，我的一个应用根本不需要进行任何形式的修正就能正确地生成正确的文件名输出，如果我在eXtremeComponents添加了toUtf8导出的文件名反而乱码。所以现在的问题是我什么时候需要对文件名进行toUtf8编码？这是这段时间一直困扰我的问题，在网友冷月宫主和MagicYang的帮助，昨天经过一整天的查找测试找到了一个暂时看来令我比较满意的解决方案（暂时没有CheckIn）： 我对得到的文件名字符串使用jchardet（http://jchardet.sourceforge.net/）进行编码检测，如果检测编码是ASCII码则直接返回原字符串，否则的话是用SpringSide提供的toUtf8方法（比我原来的简洁有效）对字符串进行编码后再返回新的字符串。对应的代码如下：
/*
* Copyright 2004 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 org.extremecomponents.table.filter;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.extremecomponents.table.context.Context;
import org.extremecomponents.table.core.TableConstants;
import org.mozilla.intl.chardet.nsDetector;
import org.mozilla.intl.chardet.nsICharsetDetectionObserver;
import org.mozilla.intl.chardet.nsPSMDetector;
/**
* @author Jeff Johnston
*/
public final class ExportFilterUtils {
private static Log logger = LogFactory.getLog(ExportFilterUtils.class);
public static boolean found = false;
private ExportFilterUtils() {
}
public static boolean isExported(Context context) {
return StringUtils.isNotBlank(getTableId(context));
}
public static String getExportFileName(Context context) {
String tableId = getTableId(context);
if (StringUtils.isNotBlank(tableId)) {
String exportFileNameStr = tableId + "_" + TableConstants.EXPORT_FILE_NAME;
String exportFileName = verifyEncoding(context.getParameter(exportFileNameStr));
if (logger.isDebugEnabled()) {
logger.debug("eXtremeTable export file name [" + exportFileNameStr + "] is [" + exportFileName + "]");
}
return exportFileName;
}
return null;
}
private static String verifyEncoding(String exportFileName) {
nsDetector det = new nsDetector(nsPSMDetector.ALL);
det.Init(new nsICharsetDetectionObserver() {
public void Notify(String charset) {
ExportFilterUtils.found = true;
}
});
boolean done = false;
boolean isAscii = true;
byte[] buf = exportFileName.getBytes();
for (int i = 0; i < buf.length; i++) {
if (isAscii)
isAscii = det.isAscii(buf, i);
if (!isAscii && !done)
done = det.DoIt(buf, i, false);
}
det.DataEnd();
if (isAscii) {
return exportFileName;
}
return toUtf8(exportFileName);
}
public static String toUtf8(String src) {
byte[] b = src.getBytes();
char[] c = new char[b.length];
for (int i = 0; i < b.length; i++) {
c[i] = (char) (b[i] & 0x00FF);
}
return new String(c);
}
/**
* There can only be one table instance (tableId) per form. If the instance
* variable exists that means there is an export being done.
*
* @param context
* @return
*/
public static String getTableId(Context context) {
return context.getParameter(TableConstants.EXPORT_TABLE_ID);
}
}
经过我们三个人测试是成功的。欢迎大家帮助测试。大家如果有任何意见、建议可与我联系： xplucky@gmail.com
压缩文件只包含： eXtremeComponents.jar eXtremeComponents.tld 和 jchardet.jar
eXtremeComponents.rar