public class UserPage extends JFrame implements ActionListener {
JTable table;
UserModel model;
private JButton addButton;
public UserPage() {
UserJDBC userJDBC = new UserJDBC();
model = new UserModel(userJDBC.getData(), userJDBC.getColumn());
table = new JTable(model);
addButton = new JButton("Add User");
addButton.addActionListener(this);
add(addButton,BorderLayout.SOUTH);
add(new JScrollPane(table), BorderLayout.CENTER);
setVisible(true);
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == addButton) addAction();
}
public void addAction() {
AddUserDialog UserDialog = new AddUserDialog(this);
model.addQuery(UserDialog.getfName(), UserDialog.getlName(), UserDialog.getGender(), UserDialog.getDate());
}
AddUserDialog类：
public class AddUserDialog extends JDialog implements ActionListener {
public AddUserDialog(JFrame owner) {
super(owner, "New User", true);
add(createForm(), BorderLayout.CENTER);
setVisible(true);
pack();
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == okBtn) {
okAction();
this.dispose();
}
}
public void okAction() {
setfName(fNameTf.getText()); // Get First name from text field
setlName(lNameTf.getText()); // Get Last name from text field
if (!genderSelection()) { // Get gender as radio buttons
return;
}
setDate(dateGenerate()); // Get date
}
模特课程：
public class UserModel extends DefaultTableModel {
public UserModel(Vector<Vector<String>> data, Vector<String> column) {
super(data, column);
}
public void addQuery(String fname, String lname, String gender, String date) {
try {
Connection con;
Statement statement;
String query = "insert into UserTable(FirstName,LastName,Gender,Date) " +
"values ( '" + fname + "' , '" + lname + "' , '" + gender + "', '" + date + "' ) ";
con = DriverManager.getConnection(...);
statement = con.createStatement();
if (statement.execute(query)) {
UserJDBC userJDBC = new UserJDBC();
fireTableRowsInserted(userJDBC.getData().size() - 1, userJDBC.getData().size() - 1);
}
} catch (SQLException sqle) {
sqle.printStackTrace();
}
}
}
我的JDBC类：
public class UserJDBC {
Vector<String> column = new Vector<String>();
Vector<Vector<String>> data = new Vector<Vector<String>>();
Connection connection = null;
Statement statement;
ResultSet resultSet;
public Vector<String> getColumn() {
// get column correctly
}
public Vector<Vector<String>> getData() {
try {
connection = DriverManager.getConnection(...);
statement = connection.createStatement();
resultSet = statement.executeQuery("select * from Table");
int c = resultSet.getMetaData().getColumnCount();
while (resultSet.next()) {
Vector<String> eachRow = new Vector<String>(c);
for (int i = 1; i <= c; i++) {
eachRow.add(resultSet.getString(i));
}
data.add(eachRow);
}
} catch (SQLException sqle) {
sqle.printStackTrace();
}
return data;
}
}
现在，当我想添加新用户时，我的GUI需要刷新以显示新行！
更新
public void addQuery(String fname, String lname, String gender, String date) {
try {
Connection con;
Statement statement;
String query = "insert into UserTable(FirstName,LastName,Gender,Date) " +
"values ( '" + fname + "' , '" + lname + "' , '" + gender + "', '" + date + "' ) ";
con = DriverManager.getConnection(...);
statement = con.createStatement();
if (statement.execute(query)) {
Object[] addedRow = new Object[]{fname,lname,gender,date};
Vector addedVector = new Vector();
addedVector.addElement(addedRow);
this.addRow(addedRow); // this?
this.addRow(addedVector); // Or this?
}
} catch (SQLException sqle) {
sqle.printStackTrace();
}
}
答案 0 :(得分：4)
1.st level，usage
private ResultSetTableModel tableModel;
private String driver = "full.name.of.driver";
private String dbName = "databseName";
private String url = "jdbc:Xxx.databaseurl, additonal parameter if needed";
private String query = "SELECT * FROM mytablename";
private JTable resultTable;
在任何地方初始化
try {
tableModel = new ResultSetTableModel(driver, url, query);
} catch (SQLException ex) {
// exception handling or JOptionPane
}
resultTable = new JTable(tableModel);
和/或从void或JButtons Action
刷新TableModelprivate void refreshTable(String query) {
try {
tableModel.setQuery(query);
} catch (SQLException sqlException) {
JOptionPane.showMessageDialog(null, sqlException.toString(), "SQL Exception", JOptionPane.ERROR_MESSAGE);
}
}
AbstractTableModel上
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.event.TableModelEvent;
import javax.swing.table.*;
// ResultSet rows and columns are counted from 1 and JTable
// rows and columns are counted from 0. When processing
// ResultSet rows or columns for use in a JTable, it is
// necessary to add 1 to the row or column number to manipulate
// the appropriate ResultSet column (i.e., JTable column 0 is
// ResultSet column 1 and JTable row 0 is ResultSet row 1).
public class ResultSetTableModel extends AbstractTableModel {
private static final long serialVersionUID = 1L;
private Connection connection;
private Statement statement;
private ResultSet resultSet;
private ResultSetMetaData metaData;
private int numberOfRows;
// initialize resultSet and obtain its meta data object determine number of rows
public ResultSetTableModel(String driver, String url,
String query) throws SQLException, ClassNotFoundException {
Class.forName(driver);// load database driver class
connection = DriverManager.getConnection(url);// connect to database
// create Statement to query database
statement = connection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_READ_ONLY);
setQuery(query);// set query and execute it
}
@Override// get class that represents column type
public Class<?> getColumnClass(int column) {// determine Java class of column
try {
String className = metaData.getColumnClassName(column + 1);
return Class.forName(className); // return Class object that represents className
} // catch SQLExceptions and ClassNotFoundExceptions
catch (Exception exception) {
exception.printStackTrace();
}
return Object.class;// if problems occur above, assume type Object
}
@Override// get number of columns in ResultSet
public int getColumnCount() {
try { // determine number of columns
return metaData.getColumnCount();
} // catch SQLExceptions and print error message
catch (SQLException sqlException) {
sqlException.printStackTrace();
}
return 0; // if problems occur above, return 0 for number of columns
}
@Override // get name of a particular column in ResultSet
public String getColumnName(int column) {
// determine column name
try {
return metaData.getColumnName(column + 1);
} // catch SQLExceptions and print error message
catch (SQLException sqlException) {
sqlException.printStackTrace();
}
return "";// if problems, return empty string for column name
}
@Override// return number of rows in ResultSet
public int getRowCount() {
return numberOfRows;
}
@Override // obtain value in particular row and column
public Object getValueAt(int row, int column) {
try { // obtain a value at specified ResultSet row and column
resultSet.absolute(row + 1);
return resultSet.getObject(column + 1);
} // catch SQLExceptions and print error message
catch (SQLException sqlException) {
sqlException.printStackTrace();
}
fireTableCellUpdated(row, column);
return "";// if problems, return empty string object
}
@Override // close Statement and Connection
protected void finalize() {
try { // close Statement and Connection
statement.close();
connection.close();
} // catch SQLExceptions and print error message
catch (SQLException sqlException) {
sqlException.printStackTrace();
}
}
// *******set new database query string*********
public void setQuery(String query) throws SQLException {
// specify query and execute it
resultSet = statement.executeQuery(query);
// obtain meta data for ResultSet
metaData = resultSet.getMetaData();
// determine number of rows in ResultSet
resultSet.last(); // move to last row
numberOfRows = resultSet.getRow(); // get row number
// notify JTable that model has changed
fireTableStructureChanged();
fireTableChanged(null);
}
public void tableChanged(TableModelEvent e) {
fireTableChanged(e);
}
}
第二。比较你的代码与这些基本的东西，例如看到连接（很长很难操作总是打开），真的这不是个好主意
注意永远不要在DefaultTableModel中调用fireWhatever，这些通知符是正确实现的，你在Swing中的Concurency是个问题