Java 全半角转换

* 全角转半角的 转换函数
* @return String
*/
public static final String full2HalfChange(String QJstr)
{
StringBuffer outStrBuf = new StringBuffer("");
String Tstr = "";
byte[] b = null;
for (int i = 0; i < QJstr.length(); i++) {
Tstr = QJstr.substring(i, i + 1);
// 全角空格转换成半角空格
if (Tstr.equals("　")) {
outStrBuf.append(" ");
continue;
}
try {
b = Tstr.getBytes("unicode");
// 得到 unicode 字节数据
if (b[2] == -1) {
// 表示全角
b[3] = (byte) (b[3] + 32);
b[2] = 0;
outStrBuf.append(new String(b, "unicode"));
} else {
outStrBuf.append(Tstr);
}
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

} // end for.
return outStrBuf.toString();

}

/**
* 半角转全角
* @return String
*/
public static final String half2Fullchange(String QJstr)
{
StringBuffer outStrBuf = new StringBuffer("");
String Tstr = "";
byte[] b = null;
for (int i = 0; i < QJstr.length(); i++) {
Tstr = QJstr.substring(i, i + 1);
if (Tstr.equals(" ")) {
// 半角空格
outStrBuf.append(Tstr);
continue;
}
try {
b = Tstr.getBytes("unicode");
if (b[2] == 0) {
// 半角
b[3] = (byte) (b[3] - 32);
b[2] = -1;
outStrBuf.append(new String(b, "unicode"));
} else {
outStrBuf.append(Tstr);
}
return outStrBuf.toString();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
return outStrBuf.toString();
}