我有一张表格，可以正确显示 txt 文件中的所有书单。我在框架中添加了一个新按钮，当获取 id 编号及其文本字段时，如果找到，则从文件中删除它的记录，但如果我也想从表中删除，我应该重新显示表框。我想，当从文件中删除一条记录时，我的表格会自动刷新，而无需重新显示表格框架。我的代码是这样的：
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
public class ReadBookFileToListM {
public ReadBookFileToListM(){
final ReadBookFileToList rbftl=new ReadBookFileToList();
final JFrame Bframe=new JFrame("All Book List");
final JTextField tf1=new JTextField(" ");
final JLabel foundlable=new JLabel();
JButton button1=new JButton("Back To Main Page");
JButton button2=new JButton("Exit");
JButton button3=new JButton("Delete Book");
button1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Bframe.setVisible(false);
new MainFrame().setVisible(true);
}
});
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
JTable Btable=new JTable(rbftl);
button3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
boolean find=false;
String Bookid=tf1.getText();
File Mf=new File("D:\\AllBookRecords.txt");
File Tf=new File("D:\\Boutput.txt");
try{
FileReader Bfr=new FileReader(Mf);
BufferedReader Bbr=new BufferedReader(Bfr);
PrintWriter Bpw=new PrintWriter(new FileWriter(Tf));
String Bs;
while( (Bs=Bbr.readLine()) != null ){
String[] Ust=Bs.split(" ");
String Bname=Ust[0];
String Bdate=Ust[1];
String id=Ust[2];
if(id.equals(Bookid.trim())){
find=true;
foundlable.setText("Book Found, "+ Bname + " " + Bdate);
}
if(!id.equals(Bookid.trim())){
Bpw.println(Bs);
}
}
Bpw.close();
Bbr.close();
Mf.delete();
Tf.renameTo(Mf);
} catch(FileNotFoundException fnfe){
foundlable.setText("File Not Found");
} catch(IOException ioe){
foundlable.setText("IO Error");
ioe.printStackTrace();
}
finally{
rbftl.fireTableDataChanged();
if(find)
foundlable.setText("Book Deleted");
else
foundlable.setText("Book Not Found!");
tf1.setText(" ");
}
}
});
JPanel panel=new JPanel();
JScrollPane sp=new JScrollPane(Btable);
button1.setToolTipText("To Go Main Page, Click here");
button2.setToolTipText("Terminate Program");
panel.add(sp);
panel.add(button1);
panel.add(button2);
panel.add(button3);
panel.add(tf1);
panel.add(foundlable);
Bframe.add(panel);
Btable.setAutoCreateRowSorter(true);
Bframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Bframe.setBounds(300, 60, 550, 550);
Bframe.setVisible(true);
}
public static void main(String[] args){
new ReadBookFileToListM();
}
}
谢谢你。