有谁知道如何通过Java获取可执行文件/文件的版本信息。场景是我的本地系统上有一个文件,如果服务器上的版本较新,则我的系统上需要从服务器上下载文件。
最佳答案
在花了几个小时上网并编码之后,我找到了使用JNA来获取文件的版本信息的解决方案。
import com.sun.jna.Library;
import com.sun.jna.Memory;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.ptr.IntByReference;
import com.sun.jna.ptr.PointerByReference;
import com.sun.jna.win32.W32APIOptions;
import java.io.IOException;
public class FileVersionInfo
{
interface Version extends Library {
Version INSTANCE = (Version) Native.loadLibrary("Version", Version.class, W32APIOptions.UNICODE_OPTIONS);
public int GetFileVersionInfoSizeW(String lptstrFilename, int dwDummy);
public boolean GetFileVersionInfoW(String lptstrFilename, int dwHandle,
int dwLen, Pointer lpData);
public int VerQueryValueW(Pointer pBlock, String lpSubBlock,
PointerByReference lplpBuffer, IntByReference puLen);
}
static class VS_FIXEDFILEINFO extends com.sun.jna.Structure {
public int dwSignature;
public int dwStrucVersion;
public int dwFileVersionMS;
public int dwFileVersionLS;
public int dwProductVersionMS;
public int dwProductVersionLS;
public int dwFileFlagsMask;
public int dwFileFlags;
public int dwFileOS;
public int dwFileType;
public int dwFileSubtype;
public int dwFileDateMS;
public int dwFileDateLS;
public VS_FIXEDFILEINFO(com.sun.jna.Pointer p){
super(p);
}
}
public static void main(String[] args) throws IOException {
int dwDummy = 0;
int versionlength = Version.INSTANCE.GetFileVersionInfoSizeW(
"C:\\Test\\chromeinstall.exe", dwDummy);
byte[] bufferarray = new byte[versionlength];
Pointer lpData = new Memory(bufferarray.length);
PointerByReference lplpBuffer = new PointerByReference();
IntByReference puLen = new IntByReference();
boolean FileInfoResult = Version.INSTANCE.GetFileVersionInfoW(
"C:\\Test\\chromeinstall.exe",
0, versionlength, lpData);
System.out.println(FileInfoResult);
int verQueryVal = Version.INSTANCE.VerQueryValueW(lpData,
"\\", lplpBuffer,
puLen);
VS_FIXEDFILEINFO lplpBufStructure = new VS_FIXEDFILEINFO(
lplpBuffer.getValue());
lplpBufStructure.read();
short[] rtnData = new short[4];
rtnData[0] = (short) (lplpBufStructure.dwFileVersionMS >> 16);
rtnData[1] = (short) (lplpBufStructure.dwFileVersionMS & 0xffff);
rtnData[2] = (short) (lplpBufStructure.dwFileVersionLS >> 16);
rtnData[3] = (short) (lplpBufStructure.dwFileVersionLS & 0xffff);
for (int i = 0; i < rtnData.length; i++) {
System.out.println(rtnData[i]);
}
}
关于java - 获取.exe的版本信息,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/27638198/