how to make runnable jar for javaCV or openCV project from Eclipse

问题

I have a openCV project in eclipse. Now I am trying to make it runnable Jar but not able to launch it , once trying to run the jar. I tried following - https://groups.google.com/forum/#!topic/javacv/ziqKIb7PgYk

but I couldn't understand properly. Can anyone explain the proper way to do the needful.

in my System , OpenCV is installed. Once I try to run the project from eclipse , everything works fine . but when I try to do the same from runnabelJar it doesn't. The problem I found it that I didn't include .dll files , so how should I do it.

回答1:

I finally got the solution. Yes we can easily make Runnable jars from eclipse while using javaCV , no need for ant or maven build.

No Need to set the class path with OpenCV, which you are only using javaCV and no intention for jni build.

Create a Java Project.
Copy all the jars.You can avoid x86 or linux or non required jars as well.

Find the jre version , if 32 bit , get the path of OpenCV 32 bits libraries else 64 bits. You can place those dlls any where in the system.. No need to place it any specific path.
Go to OpenCV jar , expand it , click on Native Library Location , edit and browse the path

Thats it , job Done , now make Runnable jar or anything , it will work like charm.

Once you provide your runnable jar to any user, then either user's openCV path should be set in the class path or you provide the dlls , and you Load the library in any static block.

回答2:

Building a jar with ANT (for javacv 0.9):

install opencv (and/or ffmpeg)
download javacv from https://github.com/bytedeco/javacv
Create a Java Project and create the directories 'lib', 'lib32' and 'lib64' in the root and add the x64 jars from javacv to lib64 - same for lib32 and the others without bit-version in lib
Add the following jars to the buildpaht of your project (Add External JARs...) and set the Native library paths for opencv (and/or ffmpeg)

Sample Test class

public class Main { 
    public static void main(String[] args) throws Exception, IOException {
        OpenCVFrameGrabber frameGrabber = new OpenCVFrameGrabber(new File(".\\tmp_files\\small.mp4"));
        frameGrabber.start();
        IplImage origImg = frameGrabber.grab();

        //create canvas frame named 'Demo'
        final CanvasFrame canvas = new CanvasFrame("Demo");

        //Show image in canvas frame
        canvas.showImage(origImg);

        //This will close canvas frame on exit
        canvas.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);    
    }
}

ANT -script

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<project basedir="." default="main" name="Main">
    <property environment="env"/>
    <property name="debuglevel" value="source,lines,vars"/>
    <property name="target" value="1.6"/>
    <property name="source" value="1.6"/>
    <property name="build.dir"     value="bin"/>
    <property name="src.dir"       value="src"/>
    <property name="lib.dir"       value="lib"/> 
    <property name="lib32.dir"       value="lib32"/>
    <property name="lib64.dir"       value="lib64"/>
    <property name="classes.dir"   value="${build.dir}/classes"/>
    <property name="jar.dir"       value="${build.dir}/jar"/>
    <property name="jar.file"      value="${jar.dir}/buildOpenCvTest32_64.jar"/>
    <property name="manifest.file" value="${jar.dir}/MANIFEST.MF"/>

    <property name="main.class" value="test.Main"/>

    <path id="external.jars">
        <fileset dir="${lib.dir}" includes="**/*.jar"/>
        <fileset dir="${libV.dir}" includes="**/*.jar"/>
    </path>

    <path id="project.classpath">
        <pathelement location="${src.dir}"/>
        <path refid="external.jars" />
    </path>

    <target name="init">
        <mkdir dir="${build.dir}"/>
        <mkdir dir="${classes.dir}"/>
        <mkdir dir="${jar.dir}"/>
        <copy includeemptydirs="false" todir="${build.dir}">
            <fileset dir="${src.dir}">
                <exclude name="**/*.launch"/>
                <exclude name="**/*.java"/>
            </fileset>
        </copy>
    </target>

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

    <target name="cleanall" depends="clean"/>

    <target name="build" depends="init">
        <echo message="${ant.project.name}: ${ant.file}"/>
        <javac debug="true" debuglevel="${debuglevel}" destdir="bin" source="${source}" target="${target}" classpathref="project.classpath">
            <src path="${src.dir}"/>
        </javac>
    </target>

    <target name="build-jar" depends="build">
        <delete file="${jar.file}" />
        <delete file="${manifest.file}" />

        <manifest file="${manifest.file}" >
            <attribute name="built-by" value="${user.name}" />
            <attribute name="Main-Class" value="${main.class}" />
        </manifest>

        <jar destfile="${jar.file}" 
            basedir="${build.dir}" 
            manifest="${manifest.file}">
            <fileset dir="${classes.dir}" includes="**/*.class" />
            <zipgroupfileset dir="${lib.dir}" includes="**/*.jar" />
            <zipgroupfileset dir="${lib32.dir}" includes="**/*.jar" />
            <zipgroupfileset dir="${lib64.dir}" includes="**/*.jar" />
        </jar>

    </target>

    <target name="main" depends="build-jar">
        <description>Main target</description>
      </target>
</project>

Run ANT - the jar should run on every 32 and 64bit Windows system. same should work for ffmpeg library and for unix systems

来源：https://stackoverflow.com/questions/19108222/how-to-make-runnable-jar-for-javacv-or-opencv-project-from-eclipse

标签

java

eclipse

OpenCV

executable-jar