CharsetUtil.java
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/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package io.mycat.backend.mysql;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.FileInputStream;
import java.util.*;
/**
* @author mycat
*/
public class CharsetUtil {
public static final Logger logger = LoggerFactory
.getLogger(CharsetUtil.class);
private static final Map<Integer,String> INDEX_TO_CHARSET = new HashMap<>();
private static final Map<String, Integer> CHARSET_TO_INDEX = new HashMap<>();
static {
// index_to_charset.properties
INDEX_TO_CHARSET.put(1,"big5");
INDEX_TO_CHARSET.put(8,"latin1");
INDEX_TO_CHARSET.put(9,"latin2");
INDEX_TO_CHARSET.put(14,"cp1251");
INDEX_TO_CHARSET.put(28,"gbk");
INDEX_TO_CHARSET.put(24,"gb2312");
INDEX_TO_CHARSET.put(33,"utf8");
INDEX_TO_CHARSET.put(45,"utf8mb4");
String filePath = Thread.currentThread().getContextClassLoader()
.getResource("").getPath().replaceAll("%20", " ")
+ "index_to_charset.properties";
Properties prop = new Properties();
try {
prop.load(new FileInputStream(filePath));
for (Object index : prop.keySet()){
INDEX_TO_CHARSET.put(Integer.parseInt((String) index), prop.getProperty((String) index));
}
} catch (Exception e) {
logger.error("error:",e);
}
// charset --> index
for(Integer key : INDEX_TO_CHARSET.keySet()){
String charset = INDEX_TO_CHARSET.get(key);
if(charset != null && CHARSET_TO_INDEX.get(charset) == null){
CHARSET_TO_INDEX.put(charset, key);
}
}
CHARSET_TO_INDEX.put("iso-8859-1", 14);
CHARSET_TO_INDEX.put("iso_8859_1", 14);
CHARSET_TO_INDEX.put("utf-8", 33);
}
public static final String getCharset(int index) {
return INDEX_TO_CHARSET.get(index);
}
public static final int getIndex(String charset) {
if (charset == null || charset.length() == 0) {
return 0;
} else {
Integer i = CHARSET_TO_INDEX.get(charset.toLowerCase());
return (i == null) ? 0 : i;
}
}
}