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IO.java
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package homework;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
public class IO
{
private JFrame jFrame;
private JPanel jPanel;
private JLabel jLabel;
private JButton chooseFile;
private JFileChooser jFileChooser;
private File file;
private Toolkit toolkit;
private StringBuilder codeOfText;
private String codeOfUser;
private JTextField jTextField;
private JButton okButton;
public IO()
{
toolkit = Toolkit.getDefaultToolkit();
init();
}
public void init()
{
jFrame = new JFrame("请输入密码：");
jFrame.setLayout(new BorderLayout());
jFrame.setBounds((toolkit.getScreenSize().width - 400) / 2, (toolkit.getScreenSize().height - 400) / 2, 300, 200);
jFrame.addWindowListener(new WindowAdapter()
{
@Override
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
jFrame.setResizable(false);
jLabel = new JLabel("请输入密码");
jLabel.setFont(new Font("微软雅黑", 1, 20));
chooseFile = new JButton("打开密码文件 ");
chooseFile.setSize(50, 25);
chooseFile.addMouseListener(new MouseAdapter()
{
@Override
public void mouseClicked(MouseEvent e)
{
chooseFile();
}
});
jTextField = new JTextField(10);
jTextField.setFont(new Font("微软雅黑", 1, 20));
okButton = new JButton("确定");
okButton.addMouseListener(new MouseAdapter()
{
@Override
public void mouseClicked(MouseEvent e)
{
try
{
codeOfUser = jTextField.getText();
if (codeOfText.toString().equals(codeOfUser))
{
mDialog(1);
}
else
mDialog(0);
} catch (NullPointerException e1)
{
mDialog(-1);
}
}
});
jPanel = new JPanel();
jPanel.add(jLabel);
jPanel.add(chooseFile);
jPanel.add(jTextField);
jPanel.add(okButton);
jFrame.add(jPanel);
jFrame.setVisible(true);
}
public void chooseFile()
{
jFileChooser = new JFileChooser(".");
jFileChooser.showOpenDialog(jFrame);
jFileChooser.setVisible(true);
jFileChooser.setBounds((toolkit.getScreenSize().width - 400) / 2, (toolkit.getScreenSize().height - 400) / 2, 300, 200);
jFileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
file = jFileChooser.getSelectedFile();
BufferedInputStream bufferedInputStream = null;
try
{
bufferedInputStream = new BufferedInputStream(new FileInputStream(file));
Byte str[] = new Byte[bufferedInputStream.available()];
int b;
codeOfText = new StringBuilder();
while ((b = bufferedInputStream.read()) != -1)
{
codeOfText.append((char) b);
}
} catch (IOException e)
{
System.out.println("打开文件失败！");
} finally
{
try
{
if (bufferedInputStream != null)
{
bufferedInputStream.close();
}
} catch (IOException e)
{
System.out.println("关闭流失败！");
}
}
}
public void mDialog(int isRight)//Dialog提示窗口
{
JDialog jDialog = new JDialog(jFrame, "输入有误！", true);
jDialog.setBounds((toolkit.getScreenSize().width - 200) / 2, (toolkit.getScreenSize().height - 200) / 2, 300, 100);
//dialog提示信息
JPanel jPanel = new JPanel();
jPanel.setLayout(new BorderLayout());//创建jPanel容器，存储两个部件，并设置为BorderLayout布局
JLabel jLabel = new JLabel();
if (isRight == 1)
jLabel.setText("密码正确！");
else if (isRight == 0)
jLabel.setText("密码错误！");
else
jLabel.setText("请先打开文件！");
jLabel.setFont(new Font("微软雅黑", 1, 20));
jLabel.setHorizontalAlignment(SwingConstants.CENTER);
JButton jButton = new JButton("确定");
jPanel.add(jLabel, BorderLayout.CENTER);
jPanel.add(jButton, BorderLayout.SOUTH);
jDialog.add(jPanel);
jDialog.validate();//同步数据，和上面的原理一样
jButton.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
jDialog.setVisible(false);//点击确定设置为不可见
}
});
jDialog.setResizable(false);//不可调整大小
jDialog.setVisible(true);
}
public static void main(String[] args)
{
new IO();
}
}