java - 创建一个独立的jar文件

Question

我已经使用 Netbeans 构建了一个 jar 文件，它在我的系统中运行良好。但我想制作能够在所有系统中运行的 jar 文件，它具有 JRE，即使 classpath 未在该系统中设置，它也应该正常工作。

package circle;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;


public class Circle {


    public static void main(String[] args) {


        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new Circle().createAndShowGUI(); 
            }
        });
    }

    private void createAndShowGUI() {
        JFrame f = new JFrame("Swing Paint Demo");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
        f.add(new MyPanel());
        f.pack();
        f.setVisible(true);

    }

    class MyPanel extends JPanel {

        public MyPanel() {

        setBorder(BorderFactory.createLineBorder(Color.black));

        addMouseListener(new MouseAdapter() {
            public void mousePressed(MouseEvent e) {
               startX=e.getX();
               startY=e.getY();
            }
        });

        addMouseMotionListener(new MouseAdapter() {
            public void mouseDragged(MouseEvent e) {
               X=e.getX();
               Y=e.getY();
               repaint();
            }
        });

    }



        public Dimension getPreferredSize() {
        return new Dimension(250,200);
    }

    protected void paintComponent(Graphics g) {
        super.paintComponent(g);       
        //g.setColor(Color.RED);
        //g.fillRect(squareX,squareY,squareW,squareH);
        g.setColor(Color.BLACK);
        g.drawOval(startX,startY,X-startX,Y-startY);
        g.fillOval(startX,startY,X-startX,Y-startY);
    }  


    }

        private int startX,startY,X,Y;
}

Answer 1

您可以使用 ant 脚本构建可运行的 JAR。

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<project default="create_run_jar" name="Create Runnable Jar for Project SimpleApp with libraries in sub-folder">
    <!--ANT 1.7 is required -->
    <target name="create_run_jar">
        <jar destfile="C:/Workspaces/SimpleApp/SimpleApp.jar">
            <manifest>
                <attribute name="Main-Class" value="SimpleApp"/>
                <attribute name="Class-Path" value=". SimpleApp_lib/lib1.jar SimpleApp_lib/lib2.jar"/>
            </manifest>
            <fileset dir="C:/Workspaces/SimpleApp/bin"/>
        </jar>
        <delete dir="C:/Workspaces/SimpleApp/SimpleApp_lib"/>
        <mkdir dir="C:/Workspaces/SimpleApp/SimpleApp_lib"/>
        <copy file="C:/path/to/lib/lib1.jar" todir="C:/Workspaces/SimpleApp/SimpleApp_lib"/>
        <copy file="C:/path/to/lib/lib2.jar" todir="C:/Workspaces/SimpleApp/SimpleApp_lib"/>
    </target>
</project>

在这个例子中，项目的SimpleApp依赖两个库:lib1.jar和lib2.jar，输出到bin 与具有指定属性的 MANIFEST.MF。