krc转lrc 酷狗加密歌词转换

import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.RandomAccessFile;
import java.text.SimpleDateFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.zip.Inflater;

public class Krc2Lrc {
private static final char key[] = { '@', 'G', 'a', 'w', '^', '2', 't', 'G', 'Q', '6', '1', '-', '\316', '\322','n', 'i' };

public static void main(String[] args) {
try {
convert("c:/a.krc");
}
catch (Exception e) {
System.err.println("failure!");
e.printStackTrace();
return;
}
System.out.println("success");
}

/*
* 参数：文件名 函数作用：解密转换
*/
public static void convert(String fileName) throws Exception {
RandomAccessFile raf = new RandomAccessFile(fileName, "r");
byte[] content = new byte[(int) (raf.length() - 4)];
raf.skipBytes(4);
raf.read(content);
raf.close();

for (int i = 0, length = content.length; i < length; i++) {
int j = i % 16; // 循环异或解密
content[i] ^= key[j];
}

String lrc = null;

lrc = new String(decompress(content), "utf-8"); // 解压为 utf8

String final_lrc = lrc.replaceAll("<([^>]*)>", "").replaceAll(",([^]]*)]", "] ");
/* 处理时间标签 */
Pattern p = Pattern.compile("\\[\\d+?\\]");
Matcher m = p.matcher(final_lrc);
while (m.find()) {
final_lrc = m.replaceFirst(toTime(m.group()));
m = p.matcher(final_lrc);
}
String lrcFileName = fileName.replaceAll(".krc", ".lrc").replaceAll("\\s-\\s\\w+.lrc", ".lrc");
FileOutputStream fos = new FileOutputStream(lrcFileName);
byte[] lrcbyte = final_lrc.getBytes();
fos.write(lrcbyte);
fos.close();
System.out.println("文件保存为："+lrcFileName);
}

private static String toTime(String num) {
SimpleDateFormat sdf = new SimpleDateFormat("mm:ss");
long time = Long.parseLong(num.substring(1, num.length() - 1));
return "[" + sdf.format(time) + "." + ((time % 1000) / 10) + "]";
}

/*
* 解压
*/
private static byte[] decompress(byte[] data) throws Exception {

byte[] output = new byte[0];
Inflater decompresser = new Inflater();
decompresser.reset();
decompresser.setInput(data);
ByteArrayOutputStream o = new ByteArrayOutputStream(data.length);
byte[] buf = new byte[1024];
while (!decompresser.finished()) {
int i = decompresser.inflate(buf);
o.write(buf, 0, i);
}
output = o.toByteArray();
o.close();
decompresser.end();
return output;
}
}