JAVA中判断字符编码以及转码

http://simlee.iteye.com/blog/431611

java中判断字符编码以及转码
[参考]判断字符编码以及转码的一个工具类 http://hi.baidu.com/pazhu/blog/item/efcce7a2034ae9a8caefd05b.html 2008-07-01 08:55

/**
* Date: 2008-6-27
* <p>Copyright: Copyright (c) 2006</p>
*
* @version 1.0
* @author: SRH
*/
public class TranCharset {

private static final String PRE_FIX_UTF = "&#x";
private static final String POS_FIX_UTF = ";";

public TranCharset() {
}

/**
* Translate charset encoding to unicode
*
* @param sTemp charset encoding is gb2312
* @return charset encoding is unicode
*/
public static String XmlFormalize(String sTemp) {
StringBuffer sb = new StringBuffer();

if (sTemp == null || sTemp.equals("")) {
return "";
}
String s = TranCharset.TranEncodeTOGB(sTemp);
for (int i = 0; i < s.length(); i++) {
char cChar = s.charAt(i);
if (TranCharset.isGB2312(cChar)) {
sb.append(PRE_FIX_UTF);
sb.append(Integer.toHexString(cChar));
sb.append(POS_FIX_UTF);
} else {
switch ((int) cChar) {
case 32:
sb.append(" ");
break;
case 34:
sb.append(""");
break;
case 38:
sb.append("&");
break;
case 60:
sb.append("<");
break;
case 62:
sb.append(">");
break;
default:
sb.append(cChar);
}
}
}
return sb.toString();
}

/**
* 将字符串编码格式转成GB2312
*
* @param str
* @return
*/
public static String TranEncodeTOGB(String str) {
try {
String strEncode = TranCharset.getEncoding(str);
String temp = new String(str.getBytes(strEncode), "GB2312");
return temp;
} catch (java.io.IOException ex) {

return null;
}
}

/**
* 判断输入字符是否为gb2312的编码格式
*
* @param c 输入字符
* @return 如果是gb2312返回真，否则返回假
*/
public static boolean isGB2312(char c) {
Character ch = new Character(c);
String sCh = ch.toString();
try {
byte[] bb = sCh.getBytes("gb2312");
if (bb.length > 1) {
return true;
}
} catch (java.io.UnsupportedEncodingException ex) {
return false;
}
return false;
}

/**
* 判断字符串的编码
*
* @param str
* @return
*/
public static String getEncoding(String str) {
String encode = "GB2312";
try {
if (str.equals(new String(str.getBytes(encode), encode))) {
String s = encode;
return s;
}
} catch (Exception exception) {
}
encode = "ISO-8859-1";
try {
if (str.equals(new String(str.getBytes(encode), encode))) {
String s1 = encode;
return s1;
}
} catch (Exception exception1) {
}
encode = "UTF-8";
try {
if (str.equals(new String(str.getBytes(encode), encode))) {
String s2 = encode;
return s2;
}
} catch (Exception exception2) {
}
encode = "GBK";
try {
if (str.equals(new String(str.getBytes(encode), encode))) {
String s3 = encode;
return s3;
}
} catch (Exception exception3) {
}
return "";
}
}