用java实现linux上exe文件的版本号读取功能，javalinux,用java实现linux

用java实现linux上exe文件的版本号读取功能，javalinux,用java实现linux

用java实现linux上exe文件的版本号读取功能。下面是详细代码：```java package com.herman.utils;

import java.io.File;  import java.io.FileNotFoundException;  import java.io.IOException;  import java.io.RandomAccessFile;  /**  * @see 获取文件信息的工具类  * @author Herman.Xiong  * @date 2014年5月12日 15:01:26  * @version V1.0  * @since tomcat 6.0 , jdk 1.6  */  public class FileUtil {      /**      * @see 获取版本信息      * @param filePath      * @return      */      public static String getVersion(String filePath) {          File file = new File(filePath);          RandomAccessFile raf = null;          byte[] buffer;          String str;          try {              raf = new RandomAccessFile(file, "r");              buffer = new byte[64];              raf.read(buffer);              str = "" + (char) buffer[0] + (char) buffer[1];              if (!"MZ".equals(str)) {                  return null;              }            int peOffset = unpack(new byte[] { buffer[60], buffer[61],                      buffer[62], buffer[63] });              if (peOffset < 64) {                  return null;              }            raf.seek(peOffset);              buffer = new byte[24];              raf.read(buffer);              str = "" + (char) buffer[0] + (char) buffer[1];              if (!"PE".equals(str)) {                  return null;              }              int machine = unpack(new byte[] { buffer[4], buffer[5] });              if (machine != 332) {                  return null;              }            int noSections = unpack(new byte[] { buffer[6], buffer[7] });              int optHdrSize = unpack(new byte[] { buffer[20], buffer[21] });              raf.seek(raf.getFilePointer() + optHdrSize);              boolean resFound = false;              for (int i = 0; i < noSections; i++) {                  buffer = new byte[40];                  raf.read(buffer);                  str = "" + (char) buffer[0] + (char) buffer[1]                          + (char) buffer[2] + (char) buffer[3]                          + (char) buffer[4];                  if (".rsrc".equals(str)) {                      resFound = true;                      break;                  }              }              if (!resFound) {                  return null;              }            int infoVirt = unpack(new byte[] { buffer[12], buffer[13],                      buffer[14], buffer[15] });              int infoSize = unpack(new byte[] { buffer[16], buffer[17],                      buffer[18], buffer[19] });              int infoOff = unpack(new byte[] { buffer[20], buffer[21],                      buffer[22], buffer[23] });              raf.seek(infoOff);              buffer = new byte[infoSize];              raf.read(buffer);              int numDirs = unpack(new byte[] { buffer[14], buffer[15] });              boolean infoFound = false;              int subOff = 0;              for (int i = 0; i < numDirs; i++) {                  int type = unpack(new byte[] { buffer[i * 8 + 16],                          buffer[i * 8 + 17], buffer[i * 8 + 18],                          buffer[i * 8 + 19] });                  if (type == 16) { // FILEINFO resource                      infoFound = true;                      subOff = unpack(new byte[] { buffer[i * 8 + 20],                              buffer[i * 8 + 21], buffer[i * 8 + 22],                              buffer[i * 8 + 23] });                      break;                  }              }              if (!infoFound) {                  return null;              }            subOff = subOff &amp; 0x7fffffff;              infoOff = unpack(new byte[] { buffer[subOff + 20],                      buffer[subOff + 21], buffer[subOff + 22],                      buffer[subOff + 23] }); // offset of first FILEINFO              infoOff = infoOff &amp; 0x7fffffff;              infoOff = unpack(new byte[] { buffer[infoOff + 20],                      buffer[infoOff + 21], buffer[infoOff + 22],                      buffer[infoOff + 23] }); // offset to data              int dataOff = unpack(new byte[] { buffer[infoOff],                      buffer[infoOff + 1], buffer[infoOff + 2],                      buffer[infoOff + 3] });              dataOff = dataOff - infoVirt;            int version1 = unpack(new byte[] { buffer[dataOff + 48],                      buffer[dataOff + 48 + 1] });              int version2 = unpack(new byte[] { buffer[dataOff + 48 + 2],                      buffer[dataOff + 48 + 3] });              int version3 = unpack(new byte[] { buffer[dataOff + 48 + 4],                      buffer[dataOff + 48 + 5] });              int version4 = unpack(new byte[] { buffer[dataOff + 48 + 6],                      buffer[dataOff + 48 + 7] });              System.out.println(version2 + "." + version1 + "." + version4 + "."                      + version3);              return version2 + "." + version1 + "." + version4 + "." + version3;          } catch (FileNotFoundException e) {              return null;          } catch (IOException e) {              return null;          } finally {              if (raf != null) {                  try {                      raf.close();                  } catch (IOException e) {                  }              }          }      }    public static int unpack(byte[] b) {          int num = 0;          for (int i = 0; i < b.length; i++) {              num = 256 * num + (b[b.length - 1 - i] &amp; 0xff);          }          return num;      }  }

```运行效果图(window上和linux的filePath自己改正正确即可)：

转自：http://blog.csdn.net/xmtblog/article/details/25620685