我有一个从文本文件中读取数据的JTextFiled和JTable。
我想在我的JTextFiled中添加一个keyListener，当输入一个数字时，程序应该搜索我的文本文件并在我的JTable上显示以该数字开头的行。
我的文字档案：
26 thired 62 Yes
29 sixth 92 No
35 vff 53 No
33 oll 36 No
38 koole 86 No
例如，当我在textfield中写“3”时，我的JTable应该自己显示这三行：
35 vff 53 No
33 oll 36 No
38 koole 86 No
我的代码：
public class BookPage extends JFrame implements KeyListener{
private AllBooks bookModel;
private JTable bTabel;
JTextField tf1;
public BookPage(){
bookModel=new AllBooks();
bTabel=new JTable(bookModel);
tf1=new JTextField(20);
tf1.addKeyListener(this);
JPanel panel= new JPanel();
JScrollPane scroolpane=new JScrollPane(bTabel);
panel.add(tf1);
panel.add(scroolpane);
this.setContentPane(panel);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setBounds(300, 60, 800, 600);
this.setVisible(true);
}
public static void main(String[] args){
new BookPage().setVisible(true);
}
@Override
public void keyTyped(KeyEvent e) {
String line=tf1.getText().trim();
SearchBook(line);
}
@Override
public void keyPressed(KeyEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
@Override
public void keyReleased(KeyEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void SearchBook(String Bid){
File f=new File("AllBookRecords.txt");
try{
FileReader Bfr=new FileReader(f);
BufferedReader Bbr=new BufferedReader(Bfr);
String bs;
while( (bs=Bbr.readLine()) != null ){
String[] Ust=bs.split(" ");
String id=Ust[0];
String Bname=Ust[1];
String Bdate=Ust[2];
String borrowS=Ust[3];
if(id.equals(Bid.trim())){
bTabel.setValueAt(Bname, 10, 1);
}
}
}
catch (IOException ex) {
}
}
}
第二课：
public class AllBooks extends AbstractTableModel{
BookInformation Binfos1=new BookInformation();
String[] Bcol=new String[]{"Id","Name","Date","Borrow Status"};
ArrayList<BookInformation> Bdata=new ArrayList<BookInformation>();
public AllBooks(){
try{
FileReader fr=new FileReader("AllBookRecords.txt");
BufferedReader br=new BufferedReader(fr);
String line;
while( (line=br.readLine()) != null){
Bdata.add(initializeBookInfos(line));
}
br.close();
}
catch(IOException ioe){
}
}
public static BookInformation initializeBookInfos(String myLine){
BookInformation Binit=new BookInformation();
String[] bookCellArray=myLine.split(" ");
Binit.setBookID(bookCellArray[0]);
Binit.setBookName(bookCellArray[1]);
Binit.setBookDate(bookCellArray[2]);
Binit.setBorrowStatus(bookCellArray[3]);
return Binit;
}
public void RemoveMyRow(int row){
if(RemoveBookFromFile(row)){
Bdata.remove(row);
fireTableRowsDeleted(row, row);
}
}
public boolean RemoveBookFromFile(int index){
File Mf=new File("AllBookRecords.txt");
File Tf=new File("Boutput.txt");
try{
BufferedReader Ubr=new BufferedReader(new FileReader(Mf));
PrintWriter Bpw=new PrintWriter(new FileWriter(Tf));
String line;
while( (line=Ubr.readLine()) != null ){
if(line.trim().length() == 0){
continue;
}
if(!line.startsWith(String.valueOf(getValueAt(index, 0)))){
Bpw.println(line);
}
}
Bpw.close();
Ubr.close();
Mf.delete();
Tf.renameTo(Mf);
return true;
} catch(FileNotFoundException e1){
return false;
}
catch(IOException ioe){
return false;
}
}
public void AddRow(BookInformation bookinfo){
if(WriteBooktofile(bookinfo.toString())){
Bdata.add(bookinfo);
fireTableRowsInserted(Bdata.size()-1, Bdata.size()-1);
}
else{
JOptionPane.showMessageDialog(null, "Unable Add To File"+bookinfo.getBookName());
}
}
public boolean WriteBooktofile(String bookc){
try{
File f=new File("AllBookRecords.txt");
FileWriter fw=new FileWriter(f.getAbsoluteFile(), true);
BufferedWriter bw=new BufferedWriter(fw);
bw.write(bookc);
bw.close();
return true;
}
catch(Exception e){
return false;
}
}
@Override
public String getColumnName(int col){
return Bcol[col];
}
@Override
public int getRowCount() {
if(Bdata !=null){
return Bdata.size();
}
else{
return 0;
}
}
@Override
public int getColumnCount() {
return Bcol.length;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
BookInformation binfo=Bdata.get(rowIndex);
Object value;
switch(columnIndex){
case 0:
value=binfo.getBookID();
break;
case 1:
value=binfo.getBookName();
break;
case 2:
value=binfo.getBookDate();
break;
case 3:
value=binfo.getBorrowStatus();
break;
default :
value="...";
}
return value;
}
}
第二课：
public class BookInformation {
private String BookName;
private String BookDate;
private String BookID;
private String BorrowStatus;
public String getBookName() {
return BookName;
}
public void setBookName(String book_name) {
this.BookName = book_name;
}
public String getBookDate() {
return BookDate;
}
public void setBookDate(String book_date) {
this.BookDate = book_date;
}
public String getBookID() {
return BookID;
}
public void setBookID(String Book_id) {
this.BookID = Book_id;
}
@Override
public String toString(){
return BookID + " " + BookName+ " "
+ BookDate +" "+ BorrowStatus + "\n";
}
public String getBorrowStatus() {
return BorrowStatus;
}
public void setBorrowStatus(String borrowStat) {
BorrowStatus = borrowStat;
}
}
感谢您的帮助。
答案 0 :(得分：5)
将所有数据加载到JTable中。然后使用表过滤功能仅显示所需的行。来自Swing教程的Sorting and Filtering部分的 TableFilterDemo 是一个可以做到这一点的工作示例。
答案 1 :(得分：2)
我必须对您的nativ代码进行一些更改才能使其正常工作。请注意，我没有检查他的功能的漏洞代码。
我用
@Override
public void keyReleased(KeyEvent e) {
String line = tf1.getText().trim();
SearchBook(line);
}
而不是public void keyTyped(KeyEvent e) {}因为它不传输第一个值
您的旧BookPage现在看起来是
public class BookPage extends JFrame implements KeyListener {
private static final long serialVersionUID = 1L;
private AllBooks bookModel;
private JTable bTabel;
JTextField tf1;
public BookPage() {
bookModel = new AllBooks();
bTabel = new JTable(bookModel);
tf1 = new JTextField(20);
tf1.addKeyListener(this);
JPanel panel = new JPanel();
JScrollPane scroolpane = new JScrollPane(bTabel);
panel.add(tf1);
panel.add(scroolpane);
this.setContentPane(panel);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setBounds(300, 60, 800, 600);
this.setVisible(true);
}
public static void main(String[] args) {
new BookPage().setVisible(true);
}
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyPressed(KeyEvent e) {
}
@Override
public void keyReleased(KeyEvent e) {
String line = tf1.getText().trim();
SearchBook(line);
}
public void SearchBook(String bid) {
List<BookInformation> filtedRows = new ArrayList<BookInformation>();
try {
InputStream stream = getClass().getResourceAsStream("AllBookRecords.txt");
BufferedReader reader = new BufferedReader(new InputStreamReader(stream, "UTF-8"));
String bs;
while((bs = reader.readLine()) != null) {
BookInformation information = new BookInformation();
String[] Ust = bs.split("\\t");
information.setBookID(Ust[0]);
information.setBookName(Ust[1]);
information.setBookDate(Ust[2]);
information.setBorrowStatus(Ust[3]);
if(information.getBookID().equals(bid) || information.getBookID().startsWith(bid)) {
filtedRows.add(information);
}
}
if(!filtedRows.isEmpty()) {
//remove old rows
for(int i = bookModel.getRowCount() - 1; i >= 0; i--) {
bookModel.RemoveMyRow(i);
}
//add new rows
for(BookInformation bookInformation : filtedRows) {
bookModel.AddRow(bookInformation);
}
}
bookModel.fireTableDataChanged();
} catch(IOException ex) {
ex.getStackTrace();
System.out.println(ex.getMessage());
}
}
}
主要更改在public void SearchBook(String bid) {}进行，如果有些不明确的话请随时问我。
在AllBooks中稍作修改
public class AllBooks extends AbstractTableModel {
private static final long serialVersionUID = 1L;
BookInformation Binfos1 = new BookInformation();
String[] bCol = new String[] { "Id", "Name", "Date", "Borrow Status" };
ArrayList<BookInformation> bData = new ArrayList<BookInformation>();
public AllBooks() {
try {
InputStream stream = getClass().getResourceAsStream("AllBookRecords.txt");
BufferedReader reader = new BufferedReader(new InputStreamReader(stream, "UTF-8"));
String line;
while((line = reader.readLine()) != null) {
bData.add(initializeBookInfos(line));
}
reader.close();
} catch(IOException ioe) {
}
}
public static BookInformation initializeBookInfos(String myLine) {
BookInformation Binit = new BookInformation();
String[] bookCellArray = myLine.split("\\t");
Binit.setBookID(bookCellArray[0]);
Binit.setBookName(bookCellArray[1]);
Binit.setBookDate(bookCellArray[2]);
Binit.setBorrowStatus(bookCellArray[3]);
return Binit;
}
public void RemoveMyRow(int row) {
if(RemoveBookFromFile(row)) {
bData.remove(row);
fireTableRowsDeleted(row, row);
}
}
public boolean RemoveBookFromFile(int index) {
File Mf = new File("AllBookRecords.txt");
File Tf = new File("Boutput.txt");
try {
BufferedReader Ubr = new BufferedReader(new FileReader(Mf));
PrintWriter Bpw = new PrintWriter(new FileWriter(Tf));
String line;
while((line = Ubr.readLine()) != null) {
if(line.trim().length() == 0) {
continue;
}
if(!line.startsWith(String.valueOf(getValueAt(index, 0)))) {
Bpw.println(line);
}
}
Bpw.close();
Ubr.close();
Mf.delete();
Tf.renameTo(Mf);
return true;
} catch(FileNotFoundException e1) {
return false;
} catch(IOException ioe) {
return false;
}
}
public void AddRow(BookInformation bookinfo) {
if(WriteBooktofile(bookinfo.toString())) {
bData.add(bookinfo);
fireTableRowsInserted(bData.size() - 1, bData.size() - 1);
} else {
JOptionPane.showMessageDialog(null, "Unable Add To File" + bookinfo.getBookName());
}
}
public boolean WriteBooktofile(String bookc) {
try {
File f = new File("AllBookRecords.txt");
FileWriter fw = new FileWriter(f.getAbsoluteFile(), true);
BufferedWriter bw = new BufferedWriter(fw);
bw.write(bookc);
bw.close();
return true;
} catch(Exception e) {
return false;
}
}
@Override
public String getColumnName(int col) {
return bCol[col];
}
@Override
public int getRowCount() {
if(bData != null) {
return bData.size();
} else {
return 0;
}
}
@Override
public int getColumnCount() {
return bCol.length;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
BookInformation binfo = bData.get(rowIndex);
Object value;
switch(columnIndex) {
case 0:
value = binfo.getBookID();
break;
case 1:
value = binfo.getBookName();
break;
case 2:
value = binfo.getBookDate();
break;
case 3:
value = binfo.getBorrowStatus();
break;
default:
value = "...";
}
return value;
}
}
现在你的AllBookRecords.txt与制表符分开（\ t）
26 thired 62 Yes
29 sixth 92 No
35 vff 53 No
33 oll 36 No
38 koole 86 No
有几种方法可以解决这个问题，但我不想在我的路上写下每一个但是试着让你的代码稍作改动