使用Java Swings和mysql自动填充表单
我在我的这个小项目中使用java swing。我有四个文本字段rollno，名称，类和部分以及搜索按钮。一旦我点击搜索按钮（文本字段为空）我得到一个列表新表中数据库中所有表项（与文本字段相同的列名）（使用Jtable）。这就是我目前所拥有的。
现在假设我点击了一行，我希望用鼠标点击这些数据出现在文本字段中，我应该怎么做？
这是我的代码：
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.sql.*;
import java.awt.event.*;
public class SearchResult implements ActionListener{
JFrame frame,frame1;
JTextField textbox,textbox1,textbox2,textbox3,textbox4,textbox5,textbox6,textbox7,textbox8;
JLabel label,label1,label2,label3,label4,label5,label6,label7,label8;
JButton button;
JPanel panel;
static JTable table;
String driverName = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/mydb";
String userName = "root";
String password = "root";
String[] columnNames = {"Roll No", "Name", "Class", "Section"};
public void createUI()
{
frame = new JFrame("Database Search Result");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(null);
textbox = new JTextField();
textbox.setBounds(120,30,150,20);
label=new JLabel("Roll No.");
label.setBounds(10, 30, 100, 20);
textbox1 = new JTextField();
textbox1.setBounds(120,50,150,20);
label1=new JLabel("Name");
label1.setBounds(10, 50, 100, 20);
textbox2 = new JTextField();
textbox2.setBounds(120,70,150,20);
label2=new JLabel("Class");
label2.setBounds(10, 70, 100, 20);
textbox3 = new JTextField();
textbox3.setBounds(120,90,150,20);
label3=new JLabel("Section");
label3.setBounds(10, 90, 100, 20);
button = new JButton("search");
button.setBounds(120,230,150,20);
button.addActionListener(this);
frame.add(textbox);
frame.add(label);
frame.add(textbox1);
frame.add(label1);
frame.add(textbox2);
frame.add(label2);
frame.add(textbox3);
frame.add(label3);
frame.add(button);
frame.setVisible(true);
frame.setSize(500, 400);
}
public void actionPerformed(ActionEvent ae)
{
button = (JButton)ae.getSource();
System.out.println("Showing Table Data.......");
showTableData();
}
public void showTableData()
{
frame1 = new JFrame("Database Search Result");
//frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame1.setLayout(new BorderLayout());
//TableModel tm = new TableModel();
DefaultTableModel model = new DefaultTableModel();
model.setColumnIdentifiers(columnNames);
//DefaultTableModel model = new DefaultTableModel(tm.getData1(), tm.getColumnNames());
//table = new JTable(model);
table = new JTable();
table.setModel(model);
table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
table.setFillsViewportHeight(true);
JScrollPane scroll = new JScrollPane(table);
scroll.setHorizontalScrollBarPolicy(
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scroll.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
String textvalue = textbox.getText();
String roll= "";
String name= "";
String cl = "";
String sec = "";
try
{
Class.forName(driverName);
Connection con = DriverManager.getConnection(url, userName, password);
//String sql = "select * from student where rollno = "+textvalue;
String sql="select * from student";
PreparedStatement ps = con.prepareStatement(sql);
ResultSet rs = ps.executeQuery();
int i =0;
while(rs.next())
{
roll = rs.getString("rollno");
name = rs.getString("name");
cl = rs.getString("class");
sec = rs.getString("section");
model.addRow(new Object[]{roll, name, cl, sec});
}
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(null, ex.getMessage(),"Error",
JOptionPane.ERROR_MESSAGE);
}
frame1.add(scroll);
frame1.setVisible(true);
frame1.setSize(400,300);
}
public static void main(String args[])
{
SearchResult sr = new SearchResult();
sr.createUI();
}
}
更新代码
import javax.swing.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.sql.*;
import java.util.Vector;
import java.awt.event.*;
public class barcoder implements ActionListener{
JFrame frame,frame1;
JTextField textbox,textbox1,textbox2,textbox3,textbox4,textbox5,textbox6,textbox7,textbox8;
JLabel label,label1,label2,label3,label4,label5,label6,label7,label8;
JButton button;
JPanel panel;
static JTable table;
String driverName = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/mydb";
String userName = "root";
String password = "root";
String[] columnNames = {"Roll No", "Name", "Class", "Section"};
public void createUI()
{
frame = new JFrame("Database Search Result");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(null);
textbox = new JTextField();
textbox.setBounds(120,30,150,20);
label=new JLabel("Roll No.");
label.setBounds(10, 30, 100, 20);
textbox1 = new JTextField();
textbox1.setBounds(120,50,150,20);
label1=new JLabel("Name");
label1.setBounds(10, 50, 100, 20);
textbox2 = new JTextField();
textbox2.setBounds(120,70,150,20);
label2=new JLabel("Class");
label2.setBounds(10, 70, 100, 20);
textbox3 = new JTextField();
textbox3.setBounds(120,90,150,20);
label3=new JLabel("Section");
label3.setBounds(10, 90, 100, 20);
button = new JButton("search");
button.setBounds(120,230,150,20);
button.addActionListener(this);
frame.add(textbox);
frame.add(label);
frame.add(textbox1);
frame.add(label1);
frame.add(textbox2);
frame.add(label2);
frame.add(textbox3);
frame.add(label3);
frame.add(button);
frame.setVisible(true);
frame.setSize(500, 400);
}
public void actionPerformed(ActionEvent ae)
{
button = (JButton)ae.getSource();
System.out.println("Showing Table Data.......");
showTableData();
}
public void showTableData()
{
frame1 = new JFrame("Database Search Result");
//frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame1.setLayout(new BorderLayout());
//TableModel tm = new TableModel();
DefaultTableModel model = new DefaultTableModel(){
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
};
model.setColumnIdentifiers(columnNames);
//DefaultTableModel model = new DefaultTableModel(tm.getData1(), tm.getColumnNames());
//table = new JTable(model);
table = new JTable();
table.setModel(model);
model.addTableModelListener(new TableModelListener() {
int row = table.getSelectedRow();
@Override
public void tableChanged(TableModelEvent arg0) {
int row = table.getSelectedRow();
System.out.println("Selecte table row = " + row);
if (row != -1) {
int modelRow = table.convertRowIndexToModel(row);
System.out.println("Selecte model row = " + row);
Vector data = (Vector) ((DefaultTableModel) table.getModel()).getDataVector().get(modelRow);
textbox.setText(data.get(0).toString());
textbox1.setText(data.get(1).toString());
textbox2.setText(data.get(2).toString());
textbox3.setText(data.get(3).toString());
}
}
});
table.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if (SwingUtilities.isLeftMouseButton(e) && e.getClickCount() == 2) {
if (table.getSelectedRow() != -1) {
SwingUtilities.getWindowAncestor(table).dispose();
}
}
}
});
table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
table.setFillsViewportHeight(true);
JScrollPane scroll = new JScrollPane(table);
scroll.setHorizontalScrollBarPolicy(
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scroll.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
String textvalue = textbox.getText();
String roll= "";
String name= "";
String cl = "";
String sec = "";
try
{
Class.forName(driverName);
Connection con = DriverManager.getConnection(url, userName, password);
//String sql = "select * from student where rollno = "+textvalue;
String sql="select * from student";
PreparedStatement ps = con.prepareStatement(sql);
ResultSet rs = ps.executeQuery();
int i =0;
while(rs.next())
{
roll = rs.getString("rollno");
name = rs.getString("name");
cl = rs.getString("class");
sec = rs.getString("section");
model.addRow(new Object[]{roll, name, cl, sec});
}
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(null, ex.getMessage(),"Error",
JOptionPane.ERROR_MESSAGE);
}
frame1.add(scroll);
frame1.setVisible(true);
frame1.setSize(400,300);
}
public static void main(String args[])
{
barcoder sr = new barcoder();
sr.createUI();
}
}
2 个答案:
答案 0 :(得分：2)
例如，鼠标，键盘或编程方式可能会出于多种原因而发生选择更改。
您最好的选择可能是在表格选择模型中添加ListSelectionListener并在那里进行更改。例如......
table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
int row = table.getSelectedRow();
if (row != -1) {
int modelRow = table.convertRowIndexToModel(row);
Vector data = (Vector)((DefaultTableModel) table.getModel()).getDataVector().get(modelRow);
}
}
});
当选择更改时，将获取指定行的列数据...
查看提供其他示例的How to use tables
更新了工作示例
因为我无法访问您的数据库，所以我将这个简单的示例放在一起，演示了基本的想法
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.DefaultTableModel;
public class TestTable {
public static void main(String[] args) {
new TestTable();
}
public TestTable() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
DefaultTableModel model = new DefaultTableModel();
final JTextField rollField = new JTextField(10);
final JTextField nameField = new JTextField(10);
final JTextField classField = new JTextField(10);
final JTextField sectionField = new JTextField(10);
JPanel details = new JPanel(new GridLayout(1, 4));
details.add(rollField);
details.add(nameField);
details.add(classField);
details.add(sectionField);
model.setColumnIdentifiers(new String[]{"Roll No", "Name", "Class", "Section"});
model.addRow(new String[]{"1", "Happy", "Warrior", "Inner"});
model.addRow(new String[]{"2", "Sad", "Mage", "Outter"});
model.addRow(new String[]{"3", "Jug Head", "Clown", "Outter space"});
final JTable table = new JTable(model);
table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent e) {
int row = table.getSelectedRow();
System.out.println("Selecte table row = " + row);
if (row != -1) {
int modelRow = table.convertRowIndexToModel(row);
System.out.println("Selecte model row = " + row);
Vector data = (Vector) ((DefaultTableModel) table.getModel()).getDataVector().get(modelRow);
rollField.setText(data.get(0).toString());
nameField.setText(data.get(1).toString());
classField.setText(data.get(2).toString());
sectionField.setText(data.get(3).toString());
}
}
});
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(details, BorderLayout.NORTH);
frame.add(new JScrollPane(table));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
更新了示例覆盖isCellEditable
DefaultTableModel model = new DefaultTableModel() {
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
};
更新了双击表格时关闭窗口的示例
table.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if (SwingUtilities.isLeftMouseButton(e) && e.getClickCount() == 2) {
if (table.getSelectedRow() != -1) {
SwingUtilities.getWindowAncestor(table).dispose();
}
}
}
});
答案 1 :(得分：0)
遵循这种方法，
单击表格中的行，读取所选行的值并将其填入相应的字段中。
import javax.swing.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.sql.*;
import java.awt.event.*;
public class SearchResult implements ActionListener{
JFrame frame,frame1;
JTextField textbox,textbox1,textbox2,textbox3,textbox4,textbox5,textbox6,textbox7,textbox8;
JLabel label,label1,label2,label3,label4,label5,label6,label7,label8;
JButton button;
JPanel panel;
static JTable table;
String driverName = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/mydb";
String userName = "root";
String password = "root";
String[] columnNames = {"Roll No", "Name", "Class", "Section"};
public void createUI()
{
frame = new JFrame("Database Search Result");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(null);
textbox = new JTextField();
textbox.setBounds(120,30,150,20);
label=new JLabel("Roll No.");
label.setBounds(10, 30, 100, 20);
textbox1 = new JTextField();
textbox1.setBounds(120,50,150,20);
label1=new JLabel("Name");
label1.setBounds(10, 50, 100, 20);
textbox2 = new JTextField();
textbox2.setBounds(120,70,150,20);
label2=new JLabel("Class");
label2.setBounds(10, 70, 100, 20);
textbox3 = new JTextField();
textbox3.setBounds(120,90,150,20);
label3=new JLabel("Section");
label3.setBounds(10, 90, 100, 20);
button = new JButton("search");
button.setBounds(120,230,150,20);
button.addActionListener(this);
frame.add(textbox);
frame.add(label);
frame.add(textbox1);
frame.add(label1);
frame.add(textbox2);
frame.add(label2);
frame.add(textbox3);
frame.add(label3);
frame.add(button);
frame.setVisible(true);
frame.setSize(500, 400);
}
public void actionPerformed(ActionEvent ae)
{
button = (JButton)ae.getSource();
System.out.println("Showing Table Data.......");
showTableData();
}
public void showTableData()
{
frame1 = new JFrame("Database Search Result");
//frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame1.setLayout(new BorderLayout());
//TableModel tm = new TableModel();
final DefaultTableModel model = new DefaultTableModel();
model.setColumnIdentifiers(columnNames);
//DefaultTableModel model = new DefaultTableModel(tm.getData1(), tm.getColumnNames());
//table = new JTable(model);
table = new JTable();
table.setModel(model);
model.addTableModelListener(new TableModelListener() {
int row = table.getSelectedRow();
@Override
public void tableChanged(TableModelEvent arg0) {
int modelRow = table.convertRowIndexToModel(row);
textbox1.setText(model.getDataVector().get(0).toString());
}
});
table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
table.setFillsViewportHeight(true);
JScrollPane scroll = new JScrollPane(table);
scroll.setHorizontalScrollBarPolicy(
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scroll.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
String textvalue = textbox.getText();
String roll= "";
String name= "";
String cl = "";
String sec = "";
try
{
Class.forName(driverName);
Connection con = DriverManager.getConnection(url, userName, password);
//String sql = "select * from student where rollno = "+textvalue;
String sql="select * from student";
PreparedStatement ps = con.prepareStatement(sql);
ResultSet rs = ps.executeQuery();
int i =0;
while(rs.next())
{
roll = rs.getString("rollno");
name = rs.getString("name");
cl = rs.getString("class");
sec = rs.getString("section");
model.addRow(new Object[]{roll, name, cl, sec});
}
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(null, ex.getMessage(),"Error",
JOptionPane.ERROR_MESSAGE);
}
frame1.add(scroll);
frame1.setVisible(true);
frame1.setSize(400,300);
}
public static void main(String args[])
{
SearchResult sr = new SearchResult();
sr.createUI();
}
}
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