找不到依赖库javacv [英] can't find dependent library javacv

问题描述

我有此代码:

package javacv;
import static com.googlecode.javacv.cpp.opencv_core.*;
import static com.googlecode.javacv.cpp.opencv_imgproc.*;
import static com.googlecode.javacv.cpp.opencv_highgui.*;
import javax.swing.JOptionPane;

/**
 *
 * @author (Mahdi)
 */
public class JavaCv {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        try {
              IplImage img = cvLoadImage("mehdi.jpg");  
                cvShowImage("Hellow", img);
                cvSmooth(img, img, CV_GAUSSIAN, 13);
                cvShowImage("Blur", img);
                cvWaitKey();
                cvReleaseImage(img);

        } catch (Exception e) {
            JOptionPane.showMessageDialog(null, e.getMessage());
        }



    }
}

运行后抛出此异常:

Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\Users\(Mahdi)\AppData\Local\Temp\javacpp66820482987315\jniopencv_core.dll: Can't find dependent libraries
    at java.lang.ClassLoader$NativeLibrary.load(Native Method)
    at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1939)
    at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1864)
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1825)
    at java.lang.Runtime.load0(Runtime.java:792)
    at java.lang.System.load(System.java:1059)
    at com.googlecode.javacpp.Loader.loadLibrary(Loader.java:566)
    at com.googlecode.javacpp.Loader.load(Loader.java:489)
    at com.googlecode.javacpp.Loader.load(Loader.java:431)
    at com.googlecode.javacv.cpp.opencv_core.<clinit>(opencv_core.java:136)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:266)
    at com.googlecode.javacpp.Loader.load(Loader.java:453)
    at com.googlecode.javacv.cpp.opencv_imgproc.<clinit>(opencv_imgproc.java:97)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:266)
    at com.googlecode.javacpp.Loader.load(Loader.java:453)
    at com.googlecode.javacv.cpp.opencv_highgui.<clinit>(opencv_highgui.java:85)
    at javacv.JavaCv.main(JavaCv.java:23)
Caused by: java.lang.UnsatisfiedLinkError: no opencv_core244 in java.library.path
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1860)
    at java.lang.Runtime.loadLibrary0(Runtime.java:845)
    at java.lang.System.loadLibrary(System.java:1084)
    at com.googlecode.javacpp.Loader.loadLibrary(Loader.java:593)
    at com.googlecode.javacpp.Loader.load(Loader.java:481)
    ... 11 more
Java Result: 1

有什么主意吗?

推荐答案

Java试图在$ {java.library.path}中查找所需的dll，但未定义. 所以你应该:

Java is trying to find required dlls in ${java.library.path} but it is not defined. So you should:

1. 在％PATH％中设置opencv_java244.dll的位置(例如"c:\ opencv \ build \ java \ x64 \").
2. 在项目目录中创建"lib"目录.
3. 放入此处:
   • javacpp.jar
   • javacv.jar
   • javacv-windows-x86_64.jar
   • opencv-2.4.4-windows-x86_64.jar
   • opencv-244.jar

1. Set location of opencv_java244.dll in %PATH% ("c:\opencv\build\java\x64\" for example).
2. Create in your project dir "lib" dir.
3. Put there:
   • javacpp.jar
   • javacv.jar
   • javacv-windows-x86_64.jar
   • opencv-2.4.4-windows-x86_64.jar
   • opencv-244.jar

如果平台的位数为32，则使用* x86.jar版本.

If your platform's bitness is 32 then use *x86.jar versions.

然后您可以使用opencv/samples/java/ant/中的此修改过的ant脚本来运行您的应用程序:

And then you may use this modified ant script from opencv/samples/java/ant/ to run your app:

<project name="JavaCv" basedir="." default="rebuild-run">

<property name="src.dir" value="src"/>
<property name="lib.dir" value="lib"/>
<path id="classpath">
    <fileset dir="${lib.dir}" includes="**/*.jar"/>
</path>

<property name="build.dir"   value="build"/>
<property name="classes.dir" value="${build.dir}/classes"/>
<property name="jar.dir"     value="${build.dir}/jar"/>

<property name="main-class"  value="${ant.project.name}"/>


<target name="clean">
    <delete dir="${build.dir}"/>
</target>

<target name="compile">
    <mkdir dir="${classes.dir}"/>
    <javac includeantruntime="false" srcdir="${src.dir}" destdir="${classes.dir}" classpathref="classpath"/>
</target>

<target name="jar" depends="compile">
    <mkdir dir="${jar.dir}"/>
    <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}">
        <manifest>
            <attribute name="Main-Class" value="${main-class}"/>
        </manifest>
    </jar>
</target>

<target name="run" depends="jar">
    <java fork="true" classname="${main-class}">
        <classpath>
            <path refid="classpath"/>
            <path location="${jar.dir}/${ant.project.name}.jar"/>
        </classpath>
    </java>
</target>

<target name="rebuild" depends="clean,jar"/>

<target name="rebuild-run" depends="clean,run"/>

或者您可以像这样在ant脚本中定义$ {java.library.path}:

Or you may define ${java.library.path} in your ant script like this:

<target name="run" depends="jar">
    <java fork="true" classname="${main-class}">
        <sysproperty key="java.library.path" path="PUT_YOUR_PATH_HERE"/>
        <classpath>
            <path refid="classpath"/>
            <path location="${jar.dir}/${ant.project.name}.jar"/>
        </classpath>
    </java>
</target>

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