实际上我正在制作一个程序，它采用 .properties 文件并在 GUI 中显示值。我已经完成了阅读和写作。现在，我不知道如何实现此添加/删除行功能。我想在运行时添加一行。我正在使用抽象表如何添加和删除行。
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.reflect.Array;
import java.util.Arrays;
import java.util.StringTokenizer;
import java.util.Vector;
import javax.swing.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
public class StackoverflowStuff implements TableModelListener {
public static void main(String[] args) {
Vector<Vector> data = new Vector<>();
String strState[] = new String[2];
strState[0] = "Property";
strState[1] = "value";
// Vector<String> columnNames = new Vector<>();
Vector<String> columnNames = new Vector<String>(Arrays.asList(strState));
String line;
try {
FileInputStream fis = new FileInputStream("C:/properties/spanish.properties");
BufferedReader br = new BufferedReader(new InputStreamReader(fis));
StringTokenizer st1 = new StringTokenizer(br.readLine(), "=");
while (st1.hasMoreTokens()) {
Vector row = new Vector();
row.addElement(st1.nextToken());
data.add(row);
}
while ((line = br.readLine()) != null) {
if (line.contains("###") && (line.contains("#"))) {
continue;
}
StringTokenizer st2 = new StringTokenizer(line, "=");
while (st2.hasMoreTokens()) {
Vector row1 = new Vector();
row1.addElement(st2.nextToken());
data.add(row1);
}
System.out.println("Selected :: " + data);
}
br.close();
} catch (Exception e) {
e.printStackTrace();
}
// final int rows = data.size();
// System.out.println("Selected :: " + data.size());
// final int columns = 2;
// for (int i = 0; i < columns; i++) {
// int dataas;
// dataas = data.size() - 1;
// System.out.println("Selected :: " + dataas);
// if (dataas % 2 == 0) {
// columnNames.add("Property");
// } else {
// columnNames.add("Value");
// }
// }
// for (int i = 0; i < rows; i++) {
// Vector row = new Vector();
// for (int j = 0; j < columns; j++) {
// row.add(j);
// }
// data.add(row);
// }
DefaultTableModel model = new DefaultTableModel(data, columnNames);
final JTable table = new JTable(model);
JButton saveBtn = new JButton("Save");
JScrollPane jsPane;
jsPane = new JScrollPane(table);
JPanel panel = new JPanel();
panel.add(jsPane, BorderLayout.CENTER);
panel.add(saveBtn);
JButton addRowbtn = new JButton("Add Row");
panel.add(addRowbtn, BorderLayout.PAGE_START);
try {
addRowbtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
// myModel.setValueAt(table, table.getRowCount() + 1, 0);
// myModel.setValueAt(table, table.getRowCount(), 1);
System.out.println("sadasdasd");
}
});
} catch (Exception e) {
e.printStackTrace();
}
try {
saveBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
try {
BufferedWriter bfw = new BufferedWriter(new FileWriter("C:/properties/cwqesdb.properties"));
for (int i = 0; i < table.getRowCount(); i++) {
bfw.newLine();
for (int j = 0; j < 1; j++) {
if (j == 0) {
bfw.write((String) (table.getValueAt(i, j)));
System.out.println("Selected data: MouseDragged :: " + table.getValueAt(i, j));
} else {
// bfw.write((String) (table.getValueAt(i, j)));
// bfw.write("=");
// System.out.println("Selected data: MouseDragged :: " + table.getValueAt(i, j));
}
}
}
bfw.flush();
bfw.close();
JOptionPane.showMessageDialog(null, "File Successfully Saved.");
} catch (IOException ex) {
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JOptionPane.showMessageDialog(null, panel);
}
@Override
public void tableChanged(TableModelEvent e) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
}
这是我的文件内容 西类牙.属性
username=Benutzername
password=Kennwort
gender=Geschlecht
male=männlich
female=weiblich
age=alter
### ewflmkdsajfaef ####sdasdfasdf
asfsadfsimpleasdf ####
asdas = asdashdash
address=Anschrift
submit=einreichen
message=Erfolgreich abgegeben ...
最佳答案
"Kindly tell me how take out file reading stuff from the model"
在您的模型中，您有两个 Vectors ，一个用于数据，一个用于列。将数据读取到 vector 中，然后创建一个 DefaultTableModel跟他们。尽管可能会让您感到困惑的是，对于您使用的数据，您使用的是单个 Vector对于数据。数据应该是二维的，因此您需要 Vector<Vector> ，就像如果您使用数组来存储数据一样，它将是 Object[][] data 。所以你可能想将你的实现更改为类似
Vector<Vector> data = new Vector<>();
Vector<String> columnName = new Vector();
...
while ((line = reader.nextLine()) != null) {
Vector row = new Vector();
// tokenize and add the `row`
data.add(row);
}
DefaultTableModel model = new DefaultTableModel(data, columnsNames);
JTable table = new JTable(model);
请参阅DefaultTableModel有关可用于操作数据的更多方法的 API 文档。
这是一个简单的例子
import java.util.Vector;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
public class StackoverflowStuff {
public static void main(String[] args) {
Vector<Vector> data = new Vector<>();
Vector<String> columnNames = new Vector<>();
final int rows = 10;
final int columns = 4;
for (int i = 0; i < columns; i++) {
columnNames.add("Col");
}
for (int i = 0; i < rows; i++) {
Vector row = new Vector();
for (int j = 0; j < columns; j++) {
row.add(j);
}
data.add(row);
}
DefaultTableModel model = new DefaultTableModel(data, columnNames);
JTable table = new JTable(model);
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JOptionPane.showMessageDialog(null, new JScrollPane(table));
}
}
如果您稍后想要向模型添加一行，您可以简单地使用 addRow 方法DefaultTableModel ，它已重载以接受 Vector或Object[]数组
更新
你正在做的是
Vector<Vector> data = new Vector();
while (... ) {
while(...) {
Vector row = new Vector();
String data = ...
row.add(data);
data.add(row);
}
}
当您应该在循环外部创建行 vector 并在循环内部添加标记，然后在循环外部添加行时，您为每个标记添加一个新行
Vector<Vector> data = new Vector();
while (... ) {
Vector row = new Vector();
while(...) {
String data = ...
row.add(data);
}
data.add(row);
}
关于java - 如何在Jtable中添加一行，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27190281/