我有一个Java应用程序，可以显示数据库中的内容。我想根据单元格的内容修改行的颜色。我尝试使用if属性从数据库中在数据检索过程中插入setBackground循环，但没有成功。
这里有代码。我做错了什么？
public class TableFrame2 extends JFrame {
private JPanel contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
String user = "root";
String password = "";
TableFrame2 frame = new TableFrame2(user, password);
frame.setVisible(true);
}
});
}
/**
* Create the frame.
* @return
*/
public TableFrame2(String user, String password) {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 399, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
JScrollPane scrollPane = new JScrollPane();
DefaultTableModel model = new DefaultTableModel();
JTable table = new JTable(model);
table.setEditingColumn(0);
table.setEditingRow(0);
table.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
table.setFillsViewportHeight(true);
table.setBackground(Color.WHITE);
table.setRowSelectionAllowed(true);
model.addColumn("iD");
model.addColumn("name");
model.addColumn("type");
table.setPreferredScrollableViewportSize(new Dimension(200, 200));
scrollPane.setViewportView(table);
try {
String dateMerged = "2015-01-30";//yearField.getText() + "-" + monthField.getText() + "-" + dayField.getText();
Connection connection = MysqlConnector.dbConnection(user, password);
String query = "SELECT * FROM booking, band WHERE room_idRoom = 2 AND idBand = band_idBand AND dateBooking BETWEEN '" +dateMerged+" 00:00:00' AND '" +dateMerged+" 23:59:59'";
PreparedStatement pst = connection.prepareStatement(query);
ResultSet rs = pst.executeQuery();
while (rs.next()){
String bandName = rs.getString("nameBand");
String bookingType = rs.getString("typeBooking");
String bookingId = rs.getString("idBooking");
model.addRow(new Object[] { bookingId, bandName,bookingType });
if (bookingType == "Recording"){
table.setBackground(Color.RED);
}
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
GroupLayout gl_contentPane = new GroupLayout(contentPane);
gl_contentPane.setHorizontalGroup(
gl_contentPane.createParallelGroup(Alignment.TRAILING)
.addGroup(Alignment.LEADING, gl_contentPane.createSequentialGroup()
.addContainerGap()
.addComponent(scrollPane, GroupLayout.PREFERRED_SIZE, 114, GroupLayout.PREFERRED_SIZE)
.addContainerGap(89, Short.MAX_VALUE))
);
gl_contentPane.setVerticalGroup(
gl_contentPane.createParallelGroup(Alignment.TRAILING)
.addGroup(gl_contentPane.createSequentialGroup()
.addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(scrollPane, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
);
}
}