文件操作：创建与删除

package com.wt010.file;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

/**
 * @author konecms
 * @date 2018年1月31日 下午5:02:24
 * 
 */
public class FileCreateAndDeleteUtil extends JFrame implements ActionListener{

    private JButton btnCreate,btnDelete;
    private JTextField txtFile;
    private JComboBox cmb;
    public FileCreateAndDeleteUtil() {
        // TODO Auto-generated constructor stub
        init(); 
    }
    public void init() {
        fr();
    }
    public void fr() {
        this.setTitle("文件创建与删除"); 
        this.setResizable(false);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLocationRelativeTo(null);
        BorderLayout bl=new BorderLayout();
        FlowLayout fl=new FlowLayout();
        GridLayout gl=new GridLayout(2,1);
        JPanel jp1=new JPanel();
        JPanel jp2=new JPanel();
        this.setLayout(bl);
        jp1.setLayout(fl);
        jp2.setLayout(fl);
         
        
        getContentPane().add("North",jp1);
        getContentPane().add("Center",jp2);
        cmb=new JComboBox();
        File[] files=File.listRoots();
        for(int i=0;i<files.length;i++) { 
            if(!files[i].toString().equals("C:\\")&&!files[i].toString().equals("D:\\"))
            cmb.addItem(files[i]);
        }
          jp1.add(cmb);
          txtFile=new JTextField(20);
          jp1.add(txtFile);
          btnCreate=new JButton("创建文件");btnCreate.addActionListener(this);
          btnDelete=new JButton("删除文件");btnDelete.addActionListener(this);
         jp1.add(btnCreate);jp1.add(btnDelete);
         
         JTextArea ta=new JTextArea(15,40);
         JScrollPane sp=new JScrollPane(ta);
         jp2.add(sp);
    }

    public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub
        Object source=e.getSource();
        String filename=txtFile.getText();
        String root=cmb.getSelectedItem().toString();
        
        if(filename.equals("")) {
            JOptionPane.showMessageDialog(this, "请输入需要文件或目录名称 。 "); 
            return;
        }
         filename=root+filename;

        if(source==btnDelete) {
            boolean bl=delete(filename);
            if(bl)
                JOptionPane.showMessageDialog(this, "删除成功 ! "); 
            else 
                JOptionPane.showMessageDialog(this, "删除失败 ！ "); 
        }
        if(source==btnCreate) {
            File file=new File(filename); 
            if(file.exists()) {
                JOptionPane.showMessageDialog(this, "文件已经存在 。");
                return;
            }
            try {
                file.createNewFile();
            } catch (IOException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
        }
    }
    public boolean delete(String filename) {
        File file=new File(filename);
        if(!file.exists()) { 
            return false;
        }
        if(file.isDirectory()) {
            return deleteDirectory(filename);
        }
        if(file.isFile()) {
            return deleteFile(filename);
        }
        return false;
    }
    public boolean deleteDirectory(String dirFile2) {
        File file=new File(dirFile2);
        File[] dirFile=file.listFiles();
        for(int i=0;i<dirFile.length;i++) {
            if(dirFile[i].isFile()) {
                deleteFile(dirFile[i].getAbsolutePath());
            }
            if(dirFile[i].isDirectory()) {
                deleteDirectory(dirFile[i].getAbsolutePath());
            }
        }
        if(file.delete()) {
            return true;
        }
        return false;
        
        
    }
    public boolean deleteFile(String filename) {
        File file=new File(filename);
        if(file.delete())
            return true;
        else
            return false;
    }
    
    public static void main(String[] args) {
        FileCreateAndDeleteUtil util=new FileCreateAndDeleteUtil();
        util.setVisible(true);
        util.pack();
    }
}