How to get the details and properties of files (such as EXE files) under Windows and Linux

Programmers are lazy, you know!

Recently in the project development, the EXE developed by the CS program, need to automatically upgrade, the EXE program is placed under Linux, the automatic upgrade will not detect the version number of the EXE program, but our client's EXE needs to get the new program version number information on the server. Finally, I use Java to implement the Linux EXE file version number read function. Here is the detailed code:

Package Com.herman.utils;import Java.io.file;import Java.io.filenotfoundexception;import java.io.IOException;  Import java.io.randomaccessfile;/** * @see Tool class for obtaining file information * @author Herman.xiong * @date May 12, 2014 15:01:26 * @version V1.0 *  @since Tomcat 6.0, JDK 1.6 */public class Fileutil {/** * @see get version information * @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 <) {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 (RA F.getfilepointer () + opthdrsize); Boolean resfound = false;for (int i = 0; i < nosections; i++) {buffer = new Byte[40];r Af.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[] {BUF FER[16], buffer[17],buffer[18], buffer[19]}); int infooff = unpack (new byte[] {buffer[20], buffer[21],buffer[22], buffer Raf.seek (infooff); buffer = new Byte[infosize];raf.read (buffer); int numdirs = unpack (new byte[] {buffer[14], buff ER[15]}); Boolean infofound = False;int Suboff = 0;for (int i = 0; i < numdirs; i++) {int type = unpack (new byte[] {BU Ffer[i * 8 + 16],buffer[i * 8 + +], Buffer[i * 8 + 18],buffer[i * 8 + 19]}), if (type = =) {//FILEINFO Resourceinfofound = True;suboff = Unpack (new byte[] {Buffer[i * 8 + 20],buffer[i * 8 + Buffer[i * 8 + 22],buffer[i * 8 +]}); break;}} if (!infofound) {return null;} Suboff = suboff & 0x7fffffff;infooff = unpack (new byte[] {Buffer[suboff + 20],buffer[suboff + +], Buffer[suboff + 22 ],buffer[suboff + 23]}); Offset of First Fileinfoinfooff = Infooff & 0x7fffffff;infooff = unpack (new byte[] {Buffer[infooff + 20],buffer[in Fooff +], Buffer[infooff + 22],buffer[infooff + 23]});  Offset to Dataint Dataoff = unpack (new byte[] {Buffer[infooff],buffer[infooff + 1], Buffer[infooff + 2],buffer[infooff + 3]});d Ataoff = Dataoff-infovirt;int Version1 = unpack (new byte[] {Buffer[dataoff + 48],buffer[dataoff + 48 + 1]});  int version2 = unpack (new byte[] {Buffer[dataoff + + + 2],buffer[dataoff + 3]}); int version3 = unpack (new byte[] { Buffer[dataoff + + + 4],buffer[dataoff + 5]}); int version4 = unpack (new byte[] {Buffer[daTaoff + + + 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.cl OSE ();} catch (IOException e) {}}}}public static int unpack (byte[] b) {int num = 0;for (int i = 0; i < b.length; i++) {num = 25 6 * num + (b[b.length-1-i] & 0xff);} return num;}}

Run (Windows and Linux filepath to correct themselves correctly):

Click to download the detailed demo project:http://download.csdn.net/detail/xmt1139057136/7335155