在我的电脑上安装 SWI-Prolog 后,我继续尝试其中的一个示例,并发现了它的特别之处:
run:
Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\Program Files (x86)\swipl\bin\jpl.dll: Can't find dependent libraries
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1807)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1732)
at java.lang.Runtime.loadLibrary0(Runtime.java:823)
at java.lang.System.loadLibrary(System.java:1028)
at jpl.JPL.loadNativeLibrary(JPL.java:100)
at jpl.fli.Prolog.<clinit>(Prolog.java:85)
at jpl.Query.open(Query.java:286)
at jpl.Util.textToTerm(Util.java:162)
at jpl.Query.<init>(Query.java:198)
at main.ProjetoPLP.main(ProjetoPLP.java:12)
Java Result: 1
我检查过,上述文件夹中有一个jpl.dll 文件,所以我不确定这里发生了什么。我已经检查了这个网站和互联网上的旧问题,但都没有提供任何确凿的答案。
有人知道该怎么做吗?
编辑:
这是我尝试运行的代码,以防万一。
package main;
import java.io.*;
import java.util.Hashtable;
import jpl.Query;
import org.apache.commons.io.*;
public class ProjetoPLP
{
private static void loadJPLDll() {
try {
InputStream in = ProjetoPLP.class.getResourceAsStream("/test/resources/jpl.dll");
File fileOut = new File("jpl.dll");
OutputStream out = FileUtils.openOutputStream(fileOut);
IOUtils.copy(in, out);
in.close();
out.close();
System.load(fileOut.getAbsolutePath());// loading goes here
} catch (Exception e) {
e.printStackTrace();
}
}
public static void
main(String args[] )
{
loadJPLDll();
String t1 = "consult('family.pl')";
Query q1 = new Query(t1);
System.out.println( t1 + " " + (q1.hasSolution() ? "succeeded" : "failed") );
//--------------------------------------------------
String t2 = "child_of(joe, ralf)";
Query q2 = new Query(t2);
System.out.println( t2 + " is " + (q2.hasSolution() ? "provable" : "not provable") );
//--------------------------------------------------
String t3 = "descendent_of(steve, ralf)";
Query q3 = new Query(t3);
System.out.println( t3 + " is " +(q3.hasSolution() ? "provable" : "not provable") );
//--------------------------------------------------
String t4 = "descendent_of(X, ralf)";
Query q4 = new Query(t4);
System.out.println( "first solution of " + t4 + ": X = " + q4.oneSolution().get("X"));
//--------------------------------------------------
Hashtable[] ss4 = q4.allSolutions();
System.out.println( "all solutions of " + t4);
for ( int i=0 ; i<ss4.length ; i++ ) {
System.out.println( "X = " + ss4[i].get("X"));
}
//--------------------------------------------------
System.out.println( "each solution of " + t4);
while ( q4.hasMoreSolutions() ){
java.util.Hashtable s4 = q4.nextSolution();
System.out.println( "X = " + s4.get("X"));
}
//--------------------------------------------------
String t5 = "descendent_of(X,Y)";
Query q5 = new Query(t5);
System.out.println( "each solution of " + t5 );
while ( q5.hasMoreSolutions() ){
java.util.Hashtable s5 = q5.nextSolution();
System.out.println( "X = " + s5.get("X") + ", Y = " + s5.get("Y"));
}
}
}