如何通过Java swing执行cmd命令
我有一个要打印的文件，我想通过java swing向他发送自定义水印。 我有2个文件NewJFrame.java和Test.java
package test; import java.io.IOException; import java.io.OutputStream; /** * * @author shaharnakash */ public class NewJFrame extends javax.swing.JFrame { /** * Creates new form NewJFrame */ public NewJFrame() { initComponents(); } /** * This method is called from within the constructor to initialize the form. * WARNING: Do NOT modify this code. The content of this method is always * regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // private void initComponents() { jLabel1 = new javax.swing.JLabel(); jTextField1 = new javax.swing.JTextField(); jButton1 = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); jLabel1.setText("whater mark name"); jTextField1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jTextField1ActionPerformed(evt); } }); jButton1.setText("submit"); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } }); org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) .add(layout.createSequentialGroup() .add(30, 30, 30) .add(jLabel1) .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .add(jTextField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 251, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE) .addContainerGap()) .add(layout.createSequentialGroup() .add(17, 17, 17) .add(jButton1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 206, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE) .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) .add(layout.createSequentialGroup() .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) .add(layout.createSequentialGroup() .add(41, 41, 41) .add(jLabel1)) .add(layout.createSequentialGroup() .addContainerGap() .add(jTextField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 57, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))) .add(112, 112, 112) .add(jButton1) .addContainerGap(96, Short.MAX_VALUE)) ); pack(); }// private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: } private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { String value; value = jTextField1.getText(); try{ String command = "cmd /c start cmd.exe"; Process child = Runtime.getRuntime().exec(command); OutputStream out = child.getOutputStream(); out.write("C:/PDF>pdfprint.exe -printer 'docPrint' -firstpage 1 -lastpage 1 -wtext 'value' -wo 100 -wa 50 -wf 'Arial' C:/readme.pdf".getBytes()); out.close(); }catch(IOException e){ } } /** * @param args the command line arguments */ public static void main(String args[]) { /* Set the Nimbus look and feel */ // /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } // /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new NewJFrame().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JButton jButton1; private javax.swing.JLabel jLabel1; private javax.swing.JTextField jTextField1; // End of variables declaration } 以及执行该程序的主要java类Test.java
package test; /** * * @author shaharnakash */ public class Test { /** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new NewJFrame().setVisible(true); } }); } }
我们的想法是在文本字段中插入一个值，然后单击提交按钮，它将执行cmd命令
C:/PDF>pdfprint.exe -printer 'docPrint' -firstpage 1 -lastpage 1 -wtext 'value' -wo 100 -wa 50 -wf 'Arial' C:/readme.pdf
当我执行程序时，它将打开cmd并且不会将文件发送到打印机
注意：草案是水印的变化
我改为Process child = Runtime.getRuntime（）。exec（“\”PDF \ pdfprint.exe -printer docPrint -firstpage 1 -lastpage 1 -wtext“+ value +”-wo 100 -wa 50 -wf Arial C：\ readme .PDF“）;
我还是不工作
就个人而言，我使用ProcessBuilder ，如果没有其他原因，它会降低使用Process涉及的大量复杂性。
ProcessBuilder pb = new ProcessBuilder("pdfprint.exe", "-printer", "'docPrint'", "-firstpage", "1", "-lastpage", "1", "-wtext", "'value'", "-wo", "100", "-wa", "50", "-wf", "'Arial'", "C:/readme.pdf"); pb.redirectErrorStream(true); Process p = pb.start(); InputStream is = p.getInputStream(); int inInt = -1; while ((inInt = is.read()) != -1) { System.out.print((char)inInt); }
现在，这是一个块调用，这意味着如果您在UI的上下文（AKA事件调度线程）中执行此操作，UI将显示为挂起，直到外部进程完成运行。
在这种情况下，您应该在后面调用execute命令。 可能最简单的方法是使用SwingWorker
public class ExeWorker extends SwingWorker { public String doInBackground() { // Execute command here... // Depending on what you want to return, setup a return value // This could an error string or the path to the output file for example... return result; } public void done() { // Back on the EDT, update the UI ;) } }
有关更多详细信息，请阅读Swing中的Concurrency
使用Runtime.getRuntime().exec()方法。 谷歌关于它的不同变种。