Java調用dll動態庫的方法,總的有三種:JNI、JNA、JNative。其中JNA調用DLL是最方便的,一般情況下選用JNA
使用JNA框架調用DLL動態庫,步驟如下:
1.引入添加jna-x.x.x.jar、jna-platform-x.x.x.jar,最新的版本的是5.5.0
<dependency>
<groupId>net.java.dev.jna</groupId>
<artifactId>jna</artifactId>
<version>5.5.0</version>
</dependency>
<dependency>
<groupId>net.java.dev.jna</groupId>
<artifactId>jna-platform</artifactId>
<version>5.5.0</version>
</dependency>
<!--整合Dll開發-->
2.代碼調用DLL動態庫方法
import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Platform;
import com.sun.jna.ptr.IntByReference;
import com.sun.jna.win32.StdCallLibrary;
/**
* JNA框架DLL動態庫讀取調用示例類
* @ClassName: DllCall
* @Description: 讀取調用DLL動態庫文件中的方法
*/
public class JNADllCall {
/**
* DLL動態庫調用方法1-StdCallDll
*/
public interface StdCallDll extends StdCallLibrary {
//獲取本電腦的位數,如x64則調用64位的dll
//String arch = System.getProperty("os.arch");
//DLL文件默認路徑爲項目根目錄,若DLL文件存放在項目外,請使用絕對路徑
StdCallDll INSTANCE = (StdCallDll) Native.load(("C:\\Users\\bank\\Desktop\\dll\\xxx"), StdCallDll.class);
void printf(String format, Object... args);
}
/**
* DLL動態庫調用方法2-CLibrary
*/
public interface CLibrary extends Library {
CLibrary INSTANCE = (CLibrary) Native.load("C:\\Users\\bank\\Desktop\\dll\\xxx", CLibrary.class);
void printf(String format, Object... args);
}
public static void main(String[] args) {
StdCallDll.INSTANCE.printf("2020-01-01");
CLibrary.INSTANCE.printf("2020-01-01");
}
}
注意:jna 5以下的版本,調用加載dll方式爲:
//加載方式1
StdCallDll INSTANCE = (StdCallDll) Native.loadLibrary(("xxx"),StdCallDll.class);
//加載方式2
CLibrary INSTANCE = (CLibrary) Native.loadLibrary(("xxx"),CLibrary.class);