UTF-8应该是可以用来表CZ文的吧？我不知道q是不是Jdom的一个BUGQJdom 1.0Qbeta?0ơ的产物哦！Q。我google了一下，大家解决q个问题的办法无非是把Jdom的输出字W集改ؓ(f)GBK或者GB2312Q但是这样就?x)有一些副作用Q如果在没有特定字符集（GBK或者GB2312Q的操作pȝ上不是依然不能正解析吗Q一个比较好的解军_法是先把中文转换成Unicode~码在直接输出，E序解析XML后的时候再把Unicode~码转回中文没有问题了?/p>
于是我查看了JDK的文，截至Java 5好像都没有做cM转换的类可以直接使用Q但是我发现一个类 java.util.PropertiesQ它的源代码里有两个U有QprivateQ方?loadConvert (char[] in, int off, int len, char[] convtBuf) ?saveConvert(String theString, boolean escapeSpace) 其实是做特D字W和Unicode~码字符间{换的Q我把它们提取出来，单独包装C个类里就可以使用了?/p>
下面是我包装的类 CharacterSetToolkit
/*
* CharacterSetToolkit.java
*
* Created on 2006q?0?7? 下午2:06
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package mobi.chenwei.lang;
/**
* q行字符操作的工L(fng)
* @author Chen Wei
* @email chenwei.mobi@gmail.com
*/
public class CharacterSetToolkit {
/** Creates a new instance of CharacterSetToolkit */
public CharacterSetToolkit() {
}
private static final char[] hexDigit = {
'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'
};
private static char toHex(int nibble) {
return hexDigit[(nibble & 0xF)];
}
/**
* 字W串~码?Unicode ?br /> * @param theString 待{换成Unicode~码的字W串?br /> * @param escapeSpace 是否忽略I格?br /> * @return q回转换后Unicode~码的字W串?br /> */
public static String toUnicode(String theString, boolean escapeSpace) {
int len = theString.length();
int bufLen = len * 2;
if (bufLen < 0) {
bufLen = Integer.MAX_VALUE;
}
StringBuffer outBuffer = new StringBuffer(bufLen);
for(int x=0; x<len; x++) {
char aChar = theString.charAt(x);
// Handle common case first, selecting largest block that
// avoids the specials below
if ((aChar > 61) && (aChar < 127)) {
if (aChar == '\\') {
outBuffer.append('\\'); outBuffer.append('\\');
continue;
}
outBuffer.append(aChar);
continue;
}
switch(aChar) {
case ' ':
if (x == 0 || escapeSpace)
outBuffer.append('\\');
outBuffer.append(' ');
break;
case '\t':outBuffer.append('\\'); outBuffer.append('t');
break;
case '\n':outBuffer.append('\\'); outBuffer.append('n');
break;
case '\r':outBuffer.append('\\'); outBuffer.append('r');
break;
case '\f':outBuffer.append('\\'); outBuffer.append('f');
break;
case '=': // Fall through
case ':': // Fall through
case '#': // Fall through
case '!':
outBuffer.append('\\'); outBuffer.append(aChar);
break;
default:
if ((aChar < 0x0020) || (aChar > 0x007e)) {
outBuffer.append('\\');
outBuffer.append('u');
outBuffer.append(toHex((aChar >> 12) & 0xF));
outBuffer.append(toHex((aChar >> 8) & 0xF));
outBuffer.append(toHex((aChar >> 4) & 0xF));
outBuffer.append(toHex( aChar & 0xF));
} else {
outBuffer.append(aChar);
}
}
}
return outBuffer.toString();
}
/**
* ?Unicode 码{换成~码前的Ҏ(gu)字符丌Ӏ?br /> * @param in Unicode~码的字W数l?br /> * @param off 转换的v始偏U量?br /> * @param len 转换的字W长度?br /> * @param convtBuf 转换的缓存字W数l?br /> * @return 完成转换Q返回编码前的特D字W串?br /> */
public String fromUnicode(char[] in, int off, int len, char[] convtBuf) {
if (convtBuf.length < len) {
int newLen = len * 2;
if (newLen < 0) {
newLen = Integer.MAX_VALUE;
}
convtBuf = new char[newLen];
}
char aChar;
char[] out = convtBuf;
int outLen = 0;
int end = off + len;
while (off < end) {
aChar = in[off++];
if (aChar == '\\') {
aChar = in[off++];
if (aChar == 'u') {
// Read the xxxx
int value = 0;
for (int i = 0; i < 4; i++) {
aChar = in[off++];
switch (aChar) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
value = (value << 4) + aChar - '0';
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
value = (value << 4) + 10 + aChar - 'a';
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
value = (value << 4) + 10 + aChar - 'A';
break;
default:
throw new IllegalArgumentException(
"Malformed \\uxxxx encoding.");
}
}
out[outLen++] = (char) value;
} else {
if (aChar == 't') {
aChar = '\t';
} else if (aChar == 'r') {
aChar = '\r';
} else if (aChar == 'n') {
aChar = '\n';
} else if (aChar == 'f') {
aChar = '\f';
}
out[outLen++] = aChar;
}
} else {
out[outLen++] = (char) aChar;
}
}
return new String(out, 0, outLen);
}
}
]]>
// 十六q制转化为十q制Q结?40?br /> Integer.parseInt("8C",16);
]]>
/** */
/**
* 点数的四舍五入?br /> *
@param
f float 代表源QҎ(gu) *
@param
digits int 保留的小数点后位?br /> *
@return
float
*/
public
static
float
round(
float
f,
int
digits)
{
float
offset
=
1f;
if
(digits
==
0
)
{ offset
=
1f; }
else
if
(digits
>
0
)
{ offset
=
digits
*
10f; }
else
if
(digits
<
0
)
{
return
f;
}
f
=
java.lang.Math.round(f
*
offset)
/
offset;
return
f; }
]]>