jna

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>jna_test</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>net.java.dev.jna</groupId>
            <artifactId>jna</artifactId>
            <version>5.3.1</version>
        </dependency>
    </dependencies>

</project>

public class JnaTest {
    public static void main(String[] args) {
        MsvcrtLibrary.INSTANCE.printf("Hello, World\n");
    }
}

import com.sun.jna.Library;
import com.sun.jna.Native;

public interface MsvcrtLibrary extends Library {
    //加载动态库
    MsvcrtLibrary INSTANCE = Native.load("msvcrt", MsvcrtLibrary.class);

    void printf(String format, Object... args);
}

Default Type Mappings

Java primitive types (and their object equivalents) map directly to the native C type of the same size.

Native Type	Size	Java Type	Common Windows Types
char	8-bit integer	byte	BYTE, TCHAR
short	16-bit integer	short	WORD
wchar_t	16/32-bit character	char	TCHAR
int	32-bit integer	int	DWORD
int	boolean value	boolean	BOOL
long	32/64-bit integer	NativeLong	LONG
long long	64-bit integer	long	__int64
float	32-bit FP	float
double	64-bit FP	double
char*	C string	String	LPTCSTR
void*	pointer	Pointer	LPVOID, HANDLE, LPXXX

Unsigned types use the same mappings as signed types. C enums are usually interchangeable with "int".

参考链接： https://github.com/twall/jna/blob/master/www/Mappings.md