Question

我想创建可执行的.jar文件， opencv 嵌入在包中。我的意思是我可以在另一台计算机上运行它。拜托，有人帮我吗???

我在档案SimpleSample.java中有这段代码：

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.CvType;
import org.opencv.core.Scalar;

class SimpleSample {

  static{ System.loadLibrary(Core.NATIVE_LIBRARY_NAME); }

  public static void main(String[] args) {
    System.out.println("Welcome to OpenCV " + Core.VERSION);
    Mat m = new Mat(5, 10, CvType.CV_8UC1, new Scalar(0));
    System.out.println("OpenCV Mat: " + m);
    Mat mr1 = m.row(1);
    mr1.setTo(new Scalar(1));
    Mat mc5 = m.col(5);
    mc5.setTo(new Scalar(5));
    System.out.println("OpenCV Mat data:\n" + m.dump());
  }
}

我尝试使用Ant build.xml构建后运行它：

<project name="SimpleSample" basedir="." default="rebuild-run">
    <property name="src.dir"     value="src"/>
    <property name="lib.dir"     value="${ocvJarDir}"/>
    <path id="classpath"><fileset dir="${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="${main-class}">
            <sysproperty key="java.library.path" path="${ocvLibDir}"/>
            <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"/>
</project>

我遇到了这个例外：

线程“main”中的异常java.lang.NoClassDefFoundError：SimpleSample中的org / opencv / core / Core。（未知来源）引起 by：java.lang.ClassNotFoundException：org.opencv.core.Core at java.net.URLClassLoader.findClass（URLClassLoader.java:381）at java.lang.ClassLoader.loadClass（ClassLoader.java:424）at sun.misc.Launcher $ AppClassLoader.loadClass（Launcher.java:331）at at java.lang.ClassLoader.loadClass（ClassLoader.java:357）... 1更多

然后我尝试了eclipse，得到了这个：

线程“main”中的异常java.lang.UnsatisfiedLinkError：no java.library.path中的opencv_java300 java.lang.ClassLoader.loadLibrary（ClassLoader.java:1864）at java.lang.Runtime.loadLibrary0（Runtime.java:870）at java.lang.System.loadLibrary（System.java:1122）at test.Test。（Test.java:10）at java.lang.Class.forName0（Native 方法）在java.lang.Class.forName（Class.java:348）at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main（JarRsrcLoader.java:56）

我需要做什么来生成工作正常的jar文件???谢谢！

Obs：我已经将opencv构建为静态库：

cmake -DBUILD_SHARED_LIBS = OFF ..

Answer 1

您需要使用jar文件打包静态库，将该静态库加载到一个temperory文件，然后从该路径加载静态库。

在名为opencv的资源中创建一个文件夹，并将.dll或.dylib个文件放在相应的文件夹中。

public class LoadLibrary {
public static void loadOpenCV() {
    try {
        InputStream inputStream = null;
        File fileOut = null;
        String osName = System.getProperty("os.name");
        System.out.println(osName);

        if (osName.startsWith("Windows")) {
            int bitness = Integer.parseInt(System.getProperty("sun.arch.data.model"));
            if (bitness == 32) {
                inputStream = LoadLibrary.class.getResourceAsStream("/opencv/windows/x86/opencv_java300.dll");
                fileOut = File.createTempFile("lib", ".dll");
            } else if (bitness == 64) {
                inputStream = LoadLibrary.class.getResourceAsStream("/opencv/windows/x64/opencv_java300.dll");
                fileOut = File.createTempFile("lib", ".dll");
            } else {
                inputStream = LoadLibrary.class.getResourceAsStream("/opencv/windows/x86/opencv_java300.dll");
                fileOut = File.createTempFile("lib", ".dll");
            }
        } else if (osName.equals("Mac OS X")) {
            inputStream = LoadLibrary.class.getResourceAsStream("/opencv/mac/libopencv_java300.dylib");
            fileOut = File.createTempFile("lib", ".dylib");
        }

        if (fileOut != null) {
            OutputStream outputStream = new FileOutputStream(fileOut);
            byte[] buffer = new byte[1024];
            int length;

            while ((length = inputStream.read(buffer)) > 0) {
                outputStream.write(buffer, 0, length);
            }

            inputStream.close();
            outputStream.close();
            System.load(fileOut.toString());
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

}

在Main中或在调用OpenCV函数之前将Static { System.loadLibrary(Core.NATIVE_LIBRARY_NAME); }更改为LoadLibrary.loadOpenCV();。

尝试从Eclipse导出jar文件。它会工作得很好。

构建使用opencv portable的java应用程序

1 个答案: