java如何运行应用程序。jar文件,其中包含OpenCV代码,是使用ant从命令行创建的?
我试图从Ubuntu控制台运行一个小型java类,其中包含如下OpenCV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());
}
}
我用蚂蚁做的;建造。xml如下所示:-
<project name="SimpleSample" basedir="." default="rebuild-run">
<property name="lib.dir" value="/opencv-2.4.7/build/bin"/>
<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="/opencv-2.4.7/build/lib"/>
<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>
当给出命令“ant”时,代码会产生以下输出:-
Buildfile: /opencv-2.4.7/samples/java/ant/build.xml
clean:
[delete] Deleting directory /opencv-2.4.7/samples/java/ant/build
compile:
[mkdir] Created dir: /opencv-2.4.7/samples/java/ant/build/classes
[javac] Compiling 1 source file to /opencv-2.4.7/samples/java/ant/build/classes
jar:
[mkdir] Created dir: /opencv-2.4.7/samples/java/ant/build/jar
[jar] Building jar: /opencv-2.4.7/samples/java/ant/build/jar/SimpleSample.jar
run:
[java] Welcome to OpenCV 2.4.7.0
[java] OpenCV Mat: Mat [ 5*10*CV_8UC1, isCont=true, isSubmat=false, nativeObj=0x7fc23c1bbc90, dataAddr=0x7fc23c1bbd50 ]
[java] OpenCV Mat data:
[java] [0, 0, 0, 0, 0, 5, 0, 0, 0, 0;
[java] 1, 1, 1, 1, 1, 5, 1, 1, 1, 1;
[java] 0, 0, 0, 0, 0, 5, 0, 0, 0, 0;
[java] 0, libdc1394 error: Failed to initialize libdc1394
[java] 0, 0, 0, 0, 5, 0, 0, 0, 0;
[java] 0, 0, 0, 0, 0, 5, 0, 0, 0, 0]
rebuild-run:
BUILD SUCCESSFUL
Total time: 3 seconds
但当我试着运行。ant在上一步中使用命令java -jar SimpleSample.jar
生成的jar文件,它给出了以下错误:-
Exception in thread "main" java.lang.NoClassDefFoundError: org/opencv/core/Core
at SimpleSample.<clinit>(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.opencv.core.Core
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 1 more
我打算运行SimpleSample。jar文件来自命令行本身,没有任何错误。有人能告诉我,我需要做什么才能做到这一点
# 1 楼答案
问题在于,您没有正确指定类路径,因此,您的依赖项可能没有正确绑定
你必须改变你的体格。xml文件。 将以下内容添加到构建中。xml
希望这能奏效
# 2 楼答案
我通过将OpenCV库jar与我构建的jar打包,解决了这个问题。在构建的“jar”目标中。xml,我添加了一个属性如下的“zipgroupfileset”: