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我有一個顯示在Jtable上的對象的數組列表。對於Jtable，我已經實現了一個擴展AbstractTableModel的模型。我希望用戶能夠保存並從.txt文件加載。現在，我可以創建並保存文件，但是當我嘗試將數據加載回jTable時，沒有任何反應。
請參閱我的代碼。任何建議表示讚賞！
謝謝！數據未加載回Jtable（使用可序列化對象）
模型
package cartedetelefon;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.table.AbstractTableModel;
public class CarteDeTelefon extends AbstractTableModel implements Serializable {
private static List<Abonat> listaContacte = new ArrayList<Abonat>();
public static File f;
private static final long serialVersionUID = 1L;
private static final Logger fLogger = Logger.getLogger(CarteDeTelefon.class.getPackage().getName());
/**
* @return the listaContacte
*/
public static List<Abonat> getListaContacte() {
return listaContacte;
}
/**
* @param aListaContacte the listaContacte to set
*/
public static void setListaContacte(List<Abonat> aListaContacte) {
listaContacte = aListaContacte;
}
private final String[] numeColoane = {
"Nume",
"Prenume",
"CNP",
"Numar telefon"
};
// add contact to list
public void adaugareContact(String nume, String prenume, String cnp, String tel) {
try {
Long s = Long.valueOf(tel);
getListaContacte().add(new Abonat(nume, prenume, cnp, new NrTel(s)));
fireTableDataChanged();
} catch (NumberFormatException numberFormatException) {
}
}
@Override
public int getRowCount() {
if (getListaContacte().size() <= 0) {
return 0;
} else {
return getListaContacte().size();
}
}
@Override
public int getColumnCount() {
return numeColoane.length;
}
@Override
public String getColumnName(int col) {
return numeColoane[col];
}
@Override
public Object getValueAt(int row, int col) {
if (col == 0) {
return getListaContacte().get(row).getNume();
} else if (col == 1) {
return getListaContacte().get(row).getPrenume();
} else if (col == 2) {
return getListaContacte().get(row).getCNP();
} else if (col == 3) {
return getListaContacte().get(row).getNrTel();
}
return "Eroare";
}
@Override
public void setValueAt(Object aValue, int rowIndex, int colIndex) {
Abonat abonat = getListaContacte().get(rowIndex);
switch (colIndex) {
case 2:
abonat.setCNP((String) aValue);
break;
case 3:
abonat.setNrTel((NrTel) aValue);
break;
}
fireTableRowsUpdated(rowIndex, rowIndex);
}
@Override
public boolean isCellEditable(int row, int colNum) {
switch (colNum) {
case 2:
return false;
default:
return true;
}
}
//save contacts
public void salvareContacte() throws FileNotFoundException, IOException {
try (
OutputStream file = new FileOutputStream("contacts.txt");
OutputStream buffer = new BufferedOutputStream(file);
ObjectOutput output = new ObjectOutputStream(buffer);) {
output.writeObject(listaContacte);
} catch (IOException ex) {
fLogger.log(Level.SEVERE, "Cannot perform output.", ex);
}
}
//load contacts
public void incarcareContacte() throws IOException, ClassNotFoundException {
try (
InputStream file = new FileInputStream("contacts.txt");
InputStream buffer = new BufferedInputStream(file);
ObjectInput input = new ObjectInputStream(buffer);) {
//deserialize the List
List<Abonat> recoveredContacts = (ArrayList<Abonat>) input.readObject();
//display its data
for (Abonat contacts : recoveredContacts) {
System.out.println("Recovered contacts: " + contacts);
}
} catch (ClassNotFoundException ex) {
fLogger.log(Level.SEVERE, "Cannot perform input. Class not found.", ex);
} catch (IOException ex) {
fLogger.log(Level.SEVERE, "Cannot perform input.", ex);
}
}
}
保存按鈕
private void saveActionPerformed(java.awt.event.ActionEvent evt) {
try {
model.salvareContacte();
} catch (IOException ex) {
Logger.getLogger(GUI.class.getName()).log(Level.SEVERE, null, ex);
}
}
打開按鈕
private void openActionPerformed(java.awt.event.ActionEvent evt) {
final JFileChooser fc = new JFileChooser();
if (evt.getSource() == open) {
int returnVal = fc.showOpenDialog(GUI.this);
if (returnVal == JFileChooser.APPROVE_OPTION) {
try {
try {
model.incarcareContacte();
} catch (ClassNotFoundException ex) {
Logger.getLogger(GUI.class.getName()).log(Level.SEVERE, null, ex);
}
} catch (IOException ex) {
Logger.getLogger(GUI.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}
編輯：
加載文件，方法incarcareContacte顯示在控制檯上一條線，如後 「回收聯繫人：[email protected]」 爲每個條目
你是什麼意思沒有任何反應？你的加載方法（incarcareContacte）甚至執行嗎？它是否會拋出異常？它是否反序列化一個空列表？ –
@馬克W看到編輯，請 – Zodrak
在這種形式的問題很難回答正確，問題可以在模型通知或不能......，fireTableDataChanged（）可以重新加載任何內容，但可以爲您的A炸彈代碼相同的方式 – mKorbel