java unicode编码与解码

public static String unicodeEncode(String str)
{
char[] charArray = str.toCharArray();
StringBuilder result = new StringBuilder();
for (int i = 0; i < charArray.length; i++)
{
result.append("\\u");
char c = charArray[i];
int j = (c >>> 8);
if (j < 16)
{
result.append("0");
}
result.append(Integer.toHexString(j));
j = (c & 0x00FF);
if (j < 16)
{
result.append("0");
}
result.append(Integer.toHexString(j));
}

return result.toString();
}

java.net.URLDecoder.decode("\u5b57\u7b26\u4e32\u8f6c\u0055\u004e\u0049\u0043\u004f\u0044\u0045\u7f16\u7801", "UTF-8")