/**
* 解析unicode字符串
* @param unicodeStr
* @return
*/
public static String readUnicodeStr(String unicodeStr) {
StringBuilder buf = new StringBuilder();
for (int i = 0; i < unicodeStr.length(); i++) {
char char1 = unicodeStr.charAt(i);
if (char1 == '\\' && isUnicode(unicodeStr, i)) {
String cStr = unicodeStr.substring(i + 2, i + 6);
int cInt = Integer.parseInt(cStr,16);
buf.append((char) cInt);
// 跨过当前unicode码，因为还有i++，所以这里i加5，而不是6
i = i + 5;
} else {
buf.append(char1);
}
}
return buf.toString();
}
// 判断以index从i开始的串，是不是unicode码
private static boolean isUnicode(String unicodeStr, int i) {
int len = unicodeStr.length();
int remain = len - i;
// unicode码，反斜杠后还有5个字符 uxxxx
if (remain < 5)
return false;
char flag2 = unicodeStr.charAt(i + 1);
if (flag2 != 'u')
return false;
String nextFour = unicodeStr.substring(i + 2, i + 6);
return isHexStr(nextFour);
}
/** hex str 0-9 a-f A-F */
private static boolean isHexStr(String str) {
for (int i = 0; i < str.length(); i++) {
char ch = str.charAt(i);
boolean isHex = ch >= '0' && ch <= '9' || ch >= 'a' && ch <= 'f' || ch >= 'A' && ch <= 'F';
if (!isHex)
return false;
}
return true;
}
来自：http://blog.csdn.net/shigang_xing/article/details/8263728
