字符串转化为unicode编码

package com.util;

import java.io.UnsupportedEncodingException;

public class UnicodeUtil
{
/**
*
* @param gbString
* @return
*/
public static String encodeUnicode(final String data)
{
char[] utfBytes = data.toCharArray();
String unicodeBytes = "";

for (char utfByte : utfBytes)
{
String hexByte = Integer.toHexString(utfByte);

if (hexByte.length() <= 2)
{
hexByte = "00" + hexByte;
}

unicodeBytes += "//u" + hexByte;
}

return unicodeBytes;
}

public static String decodeUnicode(final String data)
{
int start = 0;
int end = 0;

final StringBuilder buffer = new StringBuilder();

while (start > -1)
{
end = data.indexOf("//u", start + 1);
String charStr = "";

if (end == -1)
{
charStr = data.substring(data.length() - 4, data.length());
}
else
{
charStr = data.substring(end - 4, end);
}

char letter = (char) Integer.parseInt(charStr, 16);

buffer.append(new Character(letter).toString());
start = end;
}

return buffer.toString();
}

public static void main(String[] args) throws UnsupportedEncodingException
{
String str = "非常抱歉，暂不支持该文件类型！";

String unicode = encodeUnicode(str);
System.out.println(unicode);

String decode = decodeUnicode(unicode);

System.out.println(decode);
}
}