nginx日志中文变成类型\xE9\xA6\x96\xE9\xA1\xB5-\xE6\x8E\xA8\xE8\x8D\x90的东西

public class App {
public static String str2Hex(String str) throws UnsupportedEncodingException {
String hexRaw = String.format("%x", new BigInteger(1, str.getBytes("UTF-8")));
char[] hexRawArr = hexRaw.toCharArray();
StringBuilder hexFmtStr = new StringBuilder();
final String SEP = "\\x";
for (int i = 0; i < hexRawArr.length; i++) {
hexFmtStr.append(SEP).append(hexRawArr[i]).append(hexRawArr[++i]);
}
return hexFmtStr.toString();
}

public static String hex2Str(String str) throws UnsupportedEncodingException {
String strArr[] = str.split("\\\\"); // 分割拿到形如 xE9 的16进制数据
byte[] byteArr = new byte[strArr.length - 1];
for (int i = 1; i < strArr.length; i++) {
Integer hexInt = Integer.decode("0" + strArr[i]);
byteArr[i - 1] = hexInt.byteValue();
}

return new String(byteArr, "UTF-8");
}

public static void main(String[] args) throws UnsupportedEncodingException {

System.out.println(str2Hex("中国1a23"));
System.out.println(hex2Str(str2Hex("中国1a23")));
System.out.println(hex2Str("\\xE9\\xA6\\x96\\xE9\\xA1\\xB5\\xE6\\x8E\\xA8\\xE8\\x8D\\x90"));
}

}