java gui 文件操作：创建与删除

文件操作：创建与删除

1package com.wt010.file;
2
3import java.awt.BorderLayout;
4import java.awt.FlowLayout;
5import java.awt.GridLayout;
6import java.awt.event.ActionEvent;
7import java.awt.event.ActionListener;
8import java.io.File;
9import java.io.IOException;
10
11import javax.swing.JButton;
12import javax.swing.JComboBox;
13import javax.swing.JFrame;
14import javax.swing.JOptionPane;
15import javax.swing.JPanel;
16import javax.swing.JScrollPane;
17import javax.swing.JTextArea;
18import javax.swing.JTextField;
19
20/**
21 * @author konecms
22 * @date 2018年1月31日 下午5:02:24
23 * 
24 */
25public class FileCreateAndDeleteUtil extends JFrame implements ActionListener{
26
27    private JButton btnCreate,btnDelete;
28    private JTextField txtFile;
29    private JComboBox cmb;
30    public FileCreateAndDeleteUtil() {
31        // TODO Auto-generated constructor stub
32        init(); 
33    }
34    public void init() {
35        fr();
36    }
37    public void fr() {
38        this.setTitle("文件创建与删除"); 
39        this.setResizable(false);
40        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
41        this.setLocationRelativeTo(null);
42        BorderLayout bl=new BorderLayout();
43        FlowLayout fl=new FlowLayout();
44        GridLayout gl=new GridLayout(2,1);
45        JPanel jp1=new JPanel();
46        JPanel jp2=new JPanel();
47        this.setLayout(bl);
48        jp1.setLayout(fl);
49        jp2.setLayout(fl);
50         
51        
52        getContentPane().add("North",jp1);
53        getContentPane().add("Center",jp2);
54        cmb=new JComboBox();
55        File[] files=File.listRoots();
56        for(int i=0;i<files.length;i++) { 
57            if(!files[i].toString().equals("C:\\")&&!files[i].toString().equals("D:\\"))
58            cmb.addItem(files[i]);
59        }
60          jp1.add(cmb);
61          txtFile=new JTextField(20);
62          jp1.add(txtFile);
63          btnCreate=new JButton("创建文件");btnCreate.addActionListener(this);
64          btnDelete=new JButton("删除文件");btnDelete.addActionListener(this);
65         jp1.add(btnCreate);jp1.add(btnDelete);
66         
67         JTextArea ta=new JTextArea(15,40);
68         JScrollPane sp=new JScrollPane(ta);
69         jp2.add(sp);
70    }
71
72    public void actionPerformed(ActionEvent e) {
73        // TODO Auto-generated method stub
74        Object source=e.getSource();
75        String filename=txtFile.getText();
76        String root=cmb.getSelectedItem().toString();
77        
78        if(filename.equals("")) {
79            JOptionPane.showMessageDialog(this, "请输入需要文件或目录名称 。 "); 
80            return;
81        }
82         filename=root+filename;
83
84        if(source==btnDelete) {
85            boolean bl=delete(filename);
86            if(bl)
87                JOptionPane.showMessageDialog(this, "删除成功 ! "); 
88            else 
89                JOptionPane.showMessageDialog(this, "删除失败 ！ "); 
90        }
91        if(source==btnCreate) {
92            File file=new File(filename); 
93            if(file.exists()) {
94                JOptionPane.showMessageDialog(this, "文件已经存在 。");
95                return;
96            }
97            try {
98                file.createNewFile();
99            } catch (IOException e1) {
100                // TODO Auto-generated catch block
101                e1.printStackTrace();
102            }
103        }
104    }
105    public boolean delete(String filename) {
106        File file=new File(filename);
107        if(!file.exists()) { 
108            return false;
109        }
110        if(file.isDirectory()) {
111            return deleteDirectory(filename);
112        }
113        if(file.isFile()) {
114            return deleteFile(filename);
115        }
116        return false;
117    }
118    public boolean deleteDirectory(String dirFile2) {
119        File file=new File(dirFile2);
120        File[] dirFile=file.listFiles();
121        for(int i=0;i<dirFile.length;i++) {
122            if(dirFile[i].isFile()) {
123                deleteFile(dirFile[i].getAbsolutePath());
124            }
125            if(dirFile[i].isDirectory()) {
126                deleteDirectory(dirFile[i].getAbsolutePath());
127            }
128        }
129        if(file.delete()) {
130            return true;
131        }
132        return false;
133        
134        
135    }
136    public boolean deleteFile(String filename) {
137        File file=new File(filename);
138        if(file.delete())
139            return true;
140        else
141            return false;
142    }
143    
144    public static void main(String[] args) {
145        FileCreateAndDeleteUtil util=new FileCreateAndDeleteUtil();
146        util.setVisible(true);
147        util.pack();
148    }
149}