嗨，首先是我的代码..
主要课程：
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Main
{
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException
{
try
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch(Exception e)
{
}
LoginGUI login = new LoginGUI();
}
}
LoginGui类：
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.DriverManager;
import java.sql.SQLException;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import com.mysql.jdbc.Connection;
public class LoginGUI extends JFrame
{
private String URL,username, password;
private Login login;
private JPanel buttonPanel;
private JButton loginButton,
exit;
public LoginGUI()
{
super("Login");
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
login = new Login();
buildButtonPanel();
add(login, BorderLayout.CENTER);
add(buttonPanel, BorderLayout.PAGE_END);
setResizable(false);
pack();
setVisible(true);
}
private void buildButtonPanel()
{
buttonPanel = new JPanel();
loginButton = new JButton("Login");
loginButton.addActionListener(new loginListener());
exit = new JButton("Exit");
exit.addActionListener(new exitListener());
buttonPanel.add(loginButton);
buttonPanel.add(exit);
}
private class loginListener implements ActionListener
{
@Override
public void actionPerformed (ActionEvent e)
{
username = login.getUsername();
password = login.getPassword();
Connection con = null;
URL = "jdbc:mysql://localhost:3306/tryingsql";
try
{
Class.forName("com.mysql.jdbc.Driver");
con = (Connection) DriverManager.getConnection(URL, username, password);
JOptionPane.showMessageDialog(null, "Connection Has Been Stablished. Click Ok to Continue");
con.close();
setVisible(false);
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
createAndShowGUI();
} catch (SQLException e) {
e.printStackTrace();
}
}
});
} catch (ClassNotFoundException e1) {
JOptionPane.showMessageDialog(null, "There is a problem with the connection, try connecting again and if problem persist,"
+ " Call Customer Server");
System.exit(0);
} catch (SQLException e1) {
JOptionPane.showMessageDialog(null, "There is a problem with the Database, try connecting again and if problem persist,"
+ " Call Customer Server");;
System.exit(0);
}
}
}
private class exitListener implements ActionListener
{
@Override
public void actionPerformed (ActionEvent e)
{
JOptionPane.showMessageDialog(null, "Thanks for Using This Program");
System.exit(0);
}
}
public static String FormatPhoneNumber(String s)
{
String phoneNumber;
phoneNumber = "" + s.charAt(0) + s.charAt(1) + s.charAt(2) + "-" + s.charAt(3) + s.charAt(4) + s.charAt(5)
+ "-" + s.charAt(6) + s.charAt(7) + s.charAt(8) + s.charAt(9);
return phoneNumber;
}
private void createAndShowGUI() throws SQLException {
//Create and set up the window.
JFrame frame = new JFrame("SimpleTableDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
TablesGUI Tables = new TablesGUI(URL, username, password);
Tables.setOpaque(true); //content panes must be opaque
frame.setContentPane(Tables);
//Display the window.
frame.pack();
frame.setVisible(true);
}
}
登录课程：
import java.awt.GridLayout;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class Login extends JPanel
{
private JLabel usernameLabel, passwordLabel;
private JTextField username;
private JPasswordField password;
public Login()
{
setLayout(new GridLayout(2, 2));
usernameLabel = new JLabel("Username: ");
username = new JTextField(12);
passwordLabel = new JLabel("Password: ");
password = new JPasswordField(12);
add(usernameLabel);
add(username);
add(passwordLabel);
add(password);
}
public void setUsername(String s)
{
username.setText(s);
}
public void setPassword(String s)
{
password.setText(s);
}
public String getUsername()
{
String uname = "";
uname = username.getText();
return uname;
}
@SuppressWarnings("deprecation")
public String getPassword()
{
String pass = "";
pass = password.getText();
return pass;
}
}
TablesGUI类：
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;
import com.mysql.jdbc.ResultSetMetaData;
public class TablesGUI extends JPanel
{
private boolean DEBUG = false;
public static String FormatPhoneNumber(String s)
{
String phoneNumber;
phoneNumber = "" + s.charAt(0) + s.charAt(1) + s.charAt(2) + "-" + s.charAt(3) + s.charAt(4) + s.charAt(5)
+ "-" + s.charAt(6) + s.charAt(7) + s.charAt(8) + s.charAt(9);
return phoneNumber;
}
public TablesGUI(String url,String uname, String password) throws SQLException
{
super(new GridLayout(1,0));
try
{
Class.forName("com.mysql.jdbc.Driver");
Connection conn = (Connection) DriverManager.getConnection(url, uname, password);
PreparedStatement statement = (PreparedStatement) conn.prepareStatement("SELECT * FROM basicinformation");
ResultSet result = statement.executeQuery();
final JTable table = new JTable(writeResult(result));
table.setPreferredScrollableViewportSize(new Dimension(900, 200));
table.setFillsViewportHeight(true);
if (DEBUG)
{
table.addMouseListener(new MouseAdapter()
{
public void mouseClicked(MouseEvent e) {
printDebugData(table);
}
});
}
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane);
} catch (ClassNotFoundException ex) {
Logger.getLogger(TablesGUI.class.getName()).log(Level.SEVERE, null, ex);
}
}
public static DefaultTableModel writeResult (ResultSet res) throws SQLException {
ResultSetMetaData metaData = (ResultSetMetaData) res.getMetaData();
Vector<String> columnNames = new Vector<>();
int columnCount = metaData.getColumnCount();
for (int column = 1; column <= columnCount; column++) {
columnNames.add(metaData.getColumnName(column));
}
Vector<Vector<Object>> data = new Vector<>();
while (res.next()) {
Vector<Object> vector = new Vector<Object>();
for (int columnIndex = 1; columnIndex <= columnCount; columnIndex++) {
if(columnIndex == 8)
{
vector.add(FormatPhoneNumber(res.getString(columnIndex)));
} else if(columnIndex == 10)
{
if(res.getString(columnIndex) == null)
{
vector.add("Still Active");
} else
{
vector.add(res.getString(columnIndex));
}
}
else
{
vector.add(res.getString(columnIndex));
}
}
data.add(vector);
}
return new DefaultTableModel(data,columnNames);
}
//still working on this..
//public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears on screen.
//if(col > 8)
// return false;
//else
// return true;
// }
private void printDebugData(JTable table) {
int numRows = table.getRowCount();
int numCols = table.getColumnCount();
javax.swing.table.TableModel model = table.getModel();
System.out.println("Value of data: ");
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + model.getValueAt(i, j));
}
System.out.println();
}
System.out.println("--------------------------");
}
}
我的程序打开后出现的第一个窗口： http://postimg.org/image/d3raigkgd/ 用户输入用于连接到sql数据库的信息。这很好。
登录后主窗口： http://postimg.org/image/8j9ph9q4t/ 这里的表加载了数据库中的信息。这里的一切也很好。
到目前为止，我的程序运行正常。我现在需要和想做的就是： 1st：用户在jtables上编辑内容后能够立即更新mysqldatabase。香港专业教育学院阅读有关isEditable并从setValue解雇但未能实现它，所以如果有人可以帮助我或指向一个好的教程或一些伟大的东西。
第二步：在表格下方添加一个搜索按钮，其中有一个选择框，您可以在其中选择要搜索的内容，例如ID或名称地址等，在您输入任何内容的文本字段旁边，然后当然搜索按钮。单击时，仅显示具有相同搜索词的所有客户或所有客户。 （或者只是一个搜索框加上选择事物和表更新，因为用户在搜索框中键入任何内容，就像用户选择名称并开始键入D一样，表格会显示所有带有D的名称然后如果用户键入De或其他任何名称显示所有“DE”客户等等。
第3名：在左侧我想要一个添加（添加一个客户）和删除按钮（更多的按钮，但将来的那个）。添加客户将显示一个空行，用户将填写该行，然后添加到表和数据库。删除按钮应仅在选择客户/客户时起作用。
现在要记住的事情，是的，我是java新数据库的新手，而不是新的新的，但最近我开始了。我不是java的新手。我只是想尽可能多地学习java中的东西，数据库是我以前从未使用过的东西。此外，我不是要求你为我完成程序大声笑所有即时通讯要求是想法，相关的代码，教程或事物id需要使我想要的事情发生。提前谢谢。
也很遗憾没有在我的代码中发表评论，我通常不会在以后输入评论。对我的代码的任何建议也很受欢迎。
答案 0 :(得分：0)
首先，从表中更新数据库似乎对我不利，因为您希望能够通过某些文本字段添加客户。
要完成第3个问题，您可以让Add按钮打开一个模式JDialog，允许您输入字段，然后在输入数据时，您可以更新数据库。此外，如果成功添加数据，您只需将该行添加到表中即可。
与Delete按钮相同。如果成功删除了一行，请从表中删除它。只需循环查找表格中的行，removeRow。
对于第二个问题，您可以使用RowFilter来过滤表格。从this question运行示例以获得简单用法。另请参阅Row Filter的API。您可以添加DocumentListener来监听文本字段的更改。从链接的示例中，使用DocumentListener
jtfFilter.getDocument().addDocumentListener(new DocumentListener(){
String text = jtfFilter.getText();
@Override
public void insertUpdate(DocumentEvent e) {
if (text.trim().length() == 0) {
rowSorter.setRowFilter(null);
} else {
rowSorter.setRowFilter(RowFilter.regexFilter(text));
}
}
@Override
public void removeUpdate(DocumentEvent e) {
if (text.trim().length() == 0) {
rowSorter.setRowFilter(null);
} else {
rowSorter.setRowFilter(RowFilter.regexFilter(text));
}
}
@Override
public void changedUpdate(DocumentEvent e) {}
});
答案 1 :(得分：0)
<强> 1）
要更新数据库，您可以使用AbstractTableModel's方法。请参阅AbstractTableModel。
<强> 2）
要搜索来自JTable的数据，您可以使用以下内容：
public class JTableSearchAndHighlight extends JFrame {
private JTextField searchField;
private JTable table;
private JPanel panel;
private JScrollPane scroll;
public JTableSearchAndHighlight() {
initializeInventory();
}
private void initializeInventory() {
panel = new JPanel();
searchField = new JTextField();
panel.setLayout(null);
final String[] columnNames = {"Name", "Surname", "Age"};
final Object[][] data = {{"Jhon", "Java", "23"}, {"Stupid", "Stupido", "500"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Michael", "Winnie", "20"}, {"Winnie", "Thepoor", "23"},
{"Max", "Dumbass", "10"}, {"Melanie", "Martin", "500"},
{"Jollibe", "Mcdonalds", "15"}};
table = new JTable(data, columnNames);
table.setColumnSelectionAllowed(true);
table.setRowSelectionAllowed(true);
scroll = new JScrollPane(table);
scroll.setBounds(0, 200, 900, 150);
searchField.setBounds(10, 100, 150, 20);
searchField.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String value = searchField.getText();
for (int row = 0; row <= table.getRowCount() - 1; row++) {
for (int col = 0; col <= table.getColumnCount() - 1; col++) {
if (value.equals(table.getValueAt(row, col))) {
// this will automatically set the view of the scroll in the location of the value
table.scrollRectToVisible(table.getCellRect(row, 0, true));
// this will automatically set the focus of the searched/selected row/value
table.setRowSelectionInterval(row, row);
for (int i = 0; i <= table.getColumnCount() - 1; i++) {
table.getColumnModel().getColumn(i).setCellRenderer(new HighlightRenderer());
}
}
}
}
}
});
panel.add(searchField);
panel.add(scroll);
getContentPane().add(panel);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setTitle("Inventory Window");
setSize(900, 400);
setLocationRelativeTo(null);
setVisible(true);
}
private class HighlightRenderer extends DefaultTableCellRenderer {
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
// everything as usual
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
// added behavior
if(row == table.getSelectedRow()) {
// this will customize that kind of border that will be use to highlight a row
setBorder(BorderFactory.createMatteBorder(2, 1, 2, 1, Color.BLACK));
}
return this;
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new JTableSearchAndHighlight();
}
});
}
}
第3）
您可以像这样添加或删除JTable中的数据：
如果您使用DefaultTableModel：
，则可以执行此操作DefaultTableModel dtm = new DefaultTableModel(products, colName);
table = new JTable(dtm);
现在您可以添加和删除行：
dtm.removeRow(0); //remove first row
dtm.addRow(new Object[]{...});//add row
如果要根据ID删除行，可以搜索具有该ID的行，然后将其删除：
String searchedId = "867954";//ID of the product to remove from the table
int row = -1;//index of row or -1 if not found
//search for the row based on the ID in the first column
for(int i=0;i<dtm.getRowCount();++i)
if(dtm.getValueAt(i, 0).equals(searchedId))
{
row = i;
break;
}
if(row != -1)
dtm.removeRow(row);//remove row
else
...//not found
有用的链接