首页 > 代码库 > 如何在windows下和linux下获取文件(如exe文件)的详细信息和属性
如何在windows下和linux下获取文件(如exe文件)的详细信息和属性
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最近在项目开发中,由cs开发的exe的程序,需要自动升级,该exe程序放在linux下,自动升级时检测不到该exe程序的版本号信息,但是我们客户端的exe程序需要获取服务器上新程序的版本号信息。最后由我用java实现linux上exe文件的版本号读取功能。下面是详细代码:
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 & 0x7fffffff; infoOff = unpack(new byte[] { buffer[subOff + 20], buffer[subOff + 21], buffer[subOff + 22], buffer[subOff + 23] }); // offset of first FILEINFO infoOff = infoOff & 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] & 0xff); } return num; } }运行效果图(window上和linux的filePath自己改正正确即可):
点击下载详细的演示项目:http://download.csdn.net/detail/xmt1139057136/7335155
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