问题描述

关于用Java调用dos，有些命令可以，有些就不行

我用swing做了一个窗体，可以输入dos命令，然后在文本域控件输出结果，像ping命令这些可以成功，但输入java.java -version这些就完全没反应

解决方案

看什么命令，java.java是不是在当前路径，要么添加到环境变量，要么带上完整路径。

解决方案二：

Java调用DOS命令
java调用Dos命令
java 调用DOS命令

解决方案三：

核心代码是这样
runtime.getruntime().exec(csd)//
csd
是获取的输入的命令字符串，

解决方案四：

package newMenu;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Color;
import java.awt.Font;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import javax.swing.JSplitPane;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JTextArea;
import javax.swing.JTextPane;
import javax.swing.JLayeredPane;
import javax.swing.JScrollPane;

public class newView extends JFrame {
private JTextField textField;

/**
 * Launch the application.
 */
public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                newView frame = new newView();
                frame.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

/**
 * Create the frame.
 */
public newView() {
    setTitle("                                                                                                                   Mamager");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 791, 502);
    setLocationRelativeTo(null);
    getContentPane().setLayout(null);

    JLabel label = new JLabel("u8BF7u8F93u5165uFF1A");
    label.setBounds(108, 28, 54, 15);
    getContentPane().add(label);

    textField = new JTextField();
    textField.setColumns(10);
    textField.setBounds(154, 25, 403, 21);
    getContentPane().add(textField);

    final JTextArea textArea = new JTextArea(100,15);
    textArea.setBounds(53, 54, 682, 379);

    JScrollPane scrollPane = new JScrollPane();
    scrollPane.setBounds(53, 54, 682, 379);
    getContentPane().add(scrollPane);
    scrollPane.setColumnHeaderView(textArea);

    JButton button = new JButton("u786Eu5B9A");
    button.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            String command=textField.getText();
              Runtime r=Runtime.getRuntime();
              Process p = null;
            try {
                p = r.exec("cmd /c"+command);
                int ret = 1,res=0;
                do{
                    ret = p.waitFor();
                    res++;
                } while(ret == 1&&res<=200000);

                System.out.println("ret="+ret);
            } catch (IOException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();

            } catch (InterruptedException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
              BufferedReader br=new BufferedReader(new InputStreamReader(p.getInputStream()));
              StringBuffer sb=new StringBuffer();
              String inline;
             try {

                while(null!=(inline=br.readLine())){
                  System.out.println(inline);
                  textArea.append(inline+"
");
                  }
            } catch (IOException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            } 

        }
    });
    button.setBounds(567, 24, 93, 23);
    getContentPane().add(button);

    JMenuBar menuBar = new JMenuBar();
    menuBar.setSize(new Dimension(0, 25));
    menuBar.setBackground(Color.WHITE);
    menuBar.setAutoscrolls(true);
    menuBar.setAlignmentY(Component.BOTTOM_ALIGNMENT);
    setJMenuBar(menuBar);

    JMenu mnMenu = new JMenu("menu1");
    menuBar.add(mnMenu);

    JMenuItem mntmItem = new JMenuItem("item1");
    mntmItem.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
        System.exit(0);
        }
    });
    mnMenu.add(mntmItem);

    JMenu mnMenu_1 = new JMenu("menu2");
    mnMenu_1.setBackground(Color.WHITE);
    menuBar.add(mnMenu_1);

    JMenuItem mntmItem_1 = new JMenuItem("item2");
    mnMenu_1.add(mntmItem_1);
}

}