很多情况下,我们需要得到该系统的版本号可以运行该文件数。为了做一些额外的动作!实际上可使用jna获得,是这将依赖人家,所以还是Java自己来吧!好啦。直接上代码吧
/** * @Description: * * @Title: FileInfoUtil.java * @Package com.joyce.util * @Copyright: Copyright (c) 2014 * * @author Comsys-LZP * @date 2014-5-12 下午03:46:32 * @version V2.0 */ package com.joyce.util; import java.io.File; import java.io.RandomAccessFile; /** * @Description:文件操作工具类 * * @ClassName: FileInfoUtil * @Copyright: Copyright (c) 2014 * * @author Comsys-LZP * @date 2014-5-12 下午03:46:32 * @version V2.0 */ public class FileInfoUtil { /** * @Description: 获取文件版本号信息 * * @param file * @return * * @Title: FileInfoUtil.java * @Copyright: Copyright (c) 2014 * * @author Comsys-LZP * @date 2014-5-12 下午04:36:17 * @version V2.0 */ public static String getVersion(File file) { 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 nameEntries = unpack(new byte[] { buffer[12], buffer[13] }); int idEntries = unpack(new byte[] { buffer[14], buffer[15] }); boolean infoFound = false; int subOff = 0; for (int i = 0; i < (nameEntries + idEntries); 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] }); return version2 + "." + version1 + "." + version4 + "." + version3; } catch (Exception e) { return null; } finally { if (raf != null) { try { raf.close(); } catch (Exception e) { e.printStackTrace(); } } } } 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; } public static void main(String[] args) { try { // String filePath = "D:\\Program Files (x86)\\Wiz\\Wiz.exe"; String filePath = "D:\\Program Files (x86)\\360\\360Chrome\\Chrome\\Application\\360chrome.exe"; File file = new File(filePath); System.out.println("软件版本号号:" + getVersion(file)); } catch (Exception e) { e.printStackTrace(); } } }
真的非常赞。效果美极了!
附上完整文件资源下载地址:http://download.csdn.net/download/luo201227/7336013
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