package data.test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class UnicodeToUtf8 {
private static final Logger logger = LoggerFactory.getLogger(UnicodeToUtf8.class);
public static String decodeUnicode(String unicodeStr) {
char aChar;
int len = unicodeStr.length();
StringBuffer outBuffer = new StringBuffer(len);
for (int x = 0; x < len;) {
aChar = unicodeStr.charAt(x++);
if (aChar == '\\') {
aChar = unicodeStr.charAt(x++);
if (aChar == 'u') {
// Read the xxxx
int value = 0;
for (int i = 0; i < 4; i++) {
aChar = unicodeStr.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:
logger.warn("{}","UnicodeToUtf8 exception!");
return "";
}
}
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();
}
public static void main(String[] args) {
String str = "\u7acb\u767d_\u5168\u81ea\u52a8\u6d53\u7f29_\u6d17\u8863\u7c89_900g";
str = decodeUnicode(str);
System.out.println(str);
}
}
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