/**
 * 
 * @author YYichou 2014-07-20 15:08:48
 *
 */
public class MrpInfo {
 public String label;
 public String name;
 public String vendor;
 public String detail;
 public int appid;
 public int version;
}

import java.io.RandomAccessFile;
import java.nio.charset.Charset;

public class MrpUtils {
 public static String readMrpAppName(String path) {
  RandomAccessFile raf = null;
  try {
   raf = new RandomAccessFile(path, "r");
   byte[] buf = new byte[32];

   raf.seek(28);
   raf.read(buf, 0, 24);
   buf[24] = 0;

   return new String(buf, 0, 24, Charset.forName("GB2312"));
  } catch (Exception e) {
   e.printStackTrace();
  } finally {
   try {
    raf.close();
   } catch (Exception e) {
   }
  }

  return null;
 }

 public static int byteArrayToInt(byte[] b, int offset) {
  int value = 0;
  for (int i = 0; i < 4; i++) {
   int shift = (4 - 1 - i) * 8;
   value += (b[i + offset] & 0x000000FF) << shift;
  }

  return value;
 }

 public static MrpInfo readMrpInfo(String path) {
  MrpInfo mrpInfo = new MrpInfo();

  RandomAccessFile raf = null;
  try {
   raf = new RandomAccessFile(path, "r");
   byte[] buf = new byte[128];

   final Charset charset = Charset.forName("GB2312");

   raf.seek(28);
   raf.read(buf, 0, 22);
   mrpInfo.label = new String(buf, 0, 22, charset);

   raf.seek(16);
   raf.read(buf, 0, 12);
   mrpInfo.name = new String(buf, 0, 12, charset);

   raf.seek(68);
   raf.read(buf, 0, 4);
   mrpInfo.appid = Integer.reverseBytes(byteArrayToInt(buf, 0));

   raf.seek(72);
   raf.read(buf, 0, 4);
   mrpInfo.version = Integer.reverseBytes(byteArrayToInt(buf, 0));

   raf.seek(88);
   raf.read(buf, 0, 38);
   mrpInfo.vendor = new String(buf, 0, 38, charset);

   raf.seek(128);
   raf.read(buf, 0, 60);
   mrpInfo.detail = new String(buf, 0, 60, charset);
  } catch (Exception e) {
   e.printStackTrace();
  } finally {
   try {
    raf.close();
   } catch (Exception e) {
   }
  }

  return mrpInfo;
 }
}