从千千静听的歌词服务器查询音乐的 LRC 歌词 [Java]

从千千静听的歌词服务器查询音乐的 LRC 歌词 [Java]学习随笔images/icons/3.gif

package org.iscripts.services;

import java.io.IOException;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
import org.iscripts.common.net.HttpGet;

/**
* @author 混混(<b>ialvin.cn</b>) 广东·普宁·里湖
*/
public class LrcGet {
  public static void main(String[] args) throws Exception {
    System.out.println(query("你把爱情给了谁", "王强"));
  }

public static String query(String title, String artist)
      throws DocumentException, NumberFormatException, IOException {
    String URL = "http://ttlrcct.qianqian.com/dll/lyricsvr.dll?sh?Artist={ar}&Title={ti}&Flags=0";
    URL = URL.replace("{ar}", encode(artist))
        .replace("{ti}", encode(title));
    String result = "";
    try {
      result = HttpGet.get(URL);
    } catch (Exception e) {
      e.printStackTrace();
    }
    // 需要 dom4j-1.6.1.jar , 使用可参考 dom4j 手册
    Document doc = new SAXReader().read(new StringReader(result));
    // XML中可能包含多个匹配结果，我们只取一个
    Node n = doc.selectSingleNode("/result/lrc");
    if (n == null)
      return null;
    Element e = (Element) n;
    result = e.attributeValue("id");
    artist = e.attributeValue("artist");
    title = e.attributeValue("title");

URL = "http://ttlrcct2.qianqian.com/dll/lyricsvr.dll?dl?Id={id}&Code={code}";
    URL = URL.replace("{id}", result).replace("{code}",
        verifyCode(artist, title, Integer.parseInt(result, 10)));
    return HttpGet.get(URL);
  }

public static String verifyCode(String artist, String title, int lrcId)
      throws UnsupportedEncodingException {
    byte[] bytes = (artist + title).getBytes("UTF-8");
    int[] song = new int[bytes.length];
    for (int x = 0; x < bytes.length; x++)
      song[x] = bytes[x] & 0xff;
    int intVal1 = 0, intVal2 = 0, intVal3 = 0;
    intVal1 = (lrcId & 0xFF00) >> 8;
    if ((lrcId & 0xFF0000) == 0) {
      intVal3 = 0xFF & ~intVal1;
    } else {
      intVal3 = 0xFF & ((lrcId & 0x00FF0000) >> 16);
    }
    intVal3 = intVal3 | ((0xFF & lrcId) << 8);
    intVal3 = intVal3 << 8;
    intVal3 = intVal3 | (0xFF & intVal1);
    intVal3 = intVal3 << 8;
    if ((lrcId & 0xFF000000) == 0) {
      intVal3 = intVal3 | (0xFF & (~lrcId));
    } else {
      intVal3 = intVal3 | (0xFF & (lrcId >> 24));
    }
    int uBound = bytes.length - 1;
    while (uBound >= 0) {
      int c = song[uBound];
      if (c >= 0x80)
        c = c - 0x100;
      intVal1 = c + intVal2;
      intVal2 = intVal2 << (uBound % 2 + 4);
      intVal2 = intVal1 + intVal2;
      uBound -= 1;
    }
    uBound = 0;
    intVal1 = 0;
    while (uBound <= bytes.length - 1) {
      int c = song[uBound];
      if (c >= 128)
        c = c - 256;
      int intVal4 = c + intVal1;
      intVal1 = intVal1 << (uBound % 2 + 3);
      intVal1 = intVal1 + intVal4;
      uBound += 1;
    }
    int intVal5 = intVal2 ^ intVal3;
    intVal5 = intVal5 + (intVal1 | lrcId);
    intVal5 = intVal5 * (intVal1 | intVal3);
    intVal5 = intVal5 * (intVal2 ^ lrcId);
    return String.valueOf(intVal5);
  }

private static String encode(String value) {
    if (value == null)
      value = "";
    value = value.replace(" ", "").replace("'", "").toLowerCase();
    byte[] bytes = null;
    try {
      bytes = value.getBytes("UTF-16LE");
    } catch (UnsupportedEncodingException e) {
      e.printStackTrace();
      bytes = value.getBytes();
    }
    return stringify(bytes);
  }

final private static char[] digit = { '0', '1', '2', '3', '4', '5', '6',
      '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

private static String stringify(byte[] bytes) {
    char[] str = new char[2];
    StringBuilder builder = new StringBuilder();
    for (byte byteValue : bytes) {
      str[0] = digit[(byteValue >>> 4) & 0X0F];
      str[1] = digit[byteValue & 0X0F];
      builder.append(str);
    }
    return builder.toString();
  }
}

其中 HttpGet.get(.....)　方法是 HTTP 抓取的功能，参考：
http://www.iscripts.org/forum.php?mod=viewthread&tid=84

ASP 版的千千静听 LRC 歌词查询请点这里

原文链接：http://www.iscripts.org/forum.php?mod=viewthread&tid=85]]>2011-05-03 00:42:252011-05-22 22:44:3602590