我使用 DefaultTableModel
作为我的 JTable
模型,但不显示我的表格!
public class RecordTableGUI2 extends JFrame {
JTable table;
RecordTableModel2 model2;
public RecordTableGUI2() {
model2 = new RecordTableModel2();
table = new JTable(model2);
add(new JScrollPane(table), BorderLayout.CENTER);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(400, 500);
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new RecordTableGUI2();
}
});
}
}
模型类:
public class RecordTableModel2 extends DefaultTableModel {
Connection con;
Statement statement;
ResultSet result;
String dbUrl = "jdbc:mysql://localhost/mydb";
String query = "Select * from mytable";
Vector data = new Vector();
Vector column = new Vector();
public RecordTableModel2() {
try {
con = DriverManager.getConnection(dbUrl, "root", "2323");
statement = con.createStatement();
result = statement.executeQuery(query);
int c = result.getMetaData().getColumnCount();
for (int i = 1; i <= c; i++) {
column.add(result.getMetaData().getColumnName(i));
System.out.println(result.getMetaData().getColumnName(i)); //prints correct
}
while (result.next()) {
Vector eachRow = new Vector(c);
for (int i = 1; i <= c; i++) {
eachRow.add(result.getString(i));
System.out.println(result.getString(i)); //prints correct
}
data.add(eachRow);
}
} catch (SQLException sqle) {
sqle.printStackTrace();
} finally {
try {
if (con != null) {
con.close();
}
if (statement != null) {
statement.close();
}
} catch (SQLException sqlee) {
sqlee.printStackTrace();
}
}
}
}
如何将 vector 引入DefaultTableModel
?
输出仅显示一个空白的 JFrame
最佳答案
在构造函数的第一个语句处添加以下内容:
super(data,column);
并将data
和column
声明为静态
关于java - 带有 DefaultTableModel 的简单 JTable,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18293693/