Unicode的转码与解码
import java.io.UnsupportedEncodingException;
/**
* Unicode的转码与解码
* @author jieke_ZJ
*
*/
public class Test {
public static String convert(String str)
{
String tmp;
StringBuffer sb = new StringBuffer(1000);
char c;
int i, j;
sb.setLength(0);
for(i = 0;i<str.length();i++){
c = str.charAt(i);
if (c > 255) {
sb.append("\\u");
j = (c >>> 8);
tmp = Integer.toHexString(j);
if (tmp.length() == 1) sb.append("0");
sb.append(tmp);
j = (c & 0xFF);
tmp = Integer.toHexString(j);
if (tmp.length() == 1) sb.append("0");
sb.append(tmp);
}
else {
sb.append(c);
}
}return(new String(sb));
}
public static String decodeUnicode(String theString) {
char aChar;
int len = theString.length();
StringBuffer outBuffer = new StringBuffer(len);
for (int x = 0; x < len;) {
aChar = theString.charAt(x++);
if (aChar == '\\') {
aChar = theString.charAt(x++);
if (aChar == 'u') {
// Read the xxxx
int value = 0;
for (int i = 0; i < 4; i++) {
aChar = theString.charAt(x++);
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.");
}
}
outBuffer.append((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';
outBuffer.append(aChar);
}
} else
outBuffer.append(aChar);
}
return outBuffer.toString();
}
/**
* @param Unicode的转码与解码
* @throws UnsupportedEncodingException
*/
public static void main(String[] args) throws UnsupportedEncodingException {
// TODO Auto-generated method stub
System.out.println(convert("望月湖"));
String theString = "\u4e0a\u4f20\u6587\u4ef6\u683c\u5f0f\u9519\u8bef";
System.out.println(decodeUnicode(theString));
}
}