import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
import java.awt.event.*;
import java.sql.*;
public class Scores {
public static void main(String [] args){
new ScoresWindow("成绩查询系统");
}
}
class ScoresWindow extends JFrame{
private static final long serialVersionUID = -6924196421756933199L;
Statement statement;
Connection connection;
String commandString;
ResultSet resultSet;
JButton addJButton=new JButton("确认");
JTextField noJTextField=new JTextField(9);
JTextField scoresJTextField=new JTextField(5);
JPanel inputPanel=new JPanel(false);
JButton queryJButton=new JButton("查询");
JTextField queryNOJTextField=new JTextField(9);
JTextArea queryJTextArea=new JTextArea();
JPanel queryJPanel=new JPanel(false);
JButton sortJButton=new JButton("排序");
Object clonameObject[]={"学号","成绩"};
Integer rows=0;
DefaultTableModel tableModel=new DefaultTableModel(clonameObject,rows);
JTable table=new JTable(tableModel);
JPanel sortJPanel=new JPanel(false);
Dimension dimension=new Dimension(100,25);
public ScoresWindow(String titleString) {
super(titleString);
JTabbedPane jTabbedPane=new JTabbedPane();
JComponent inputPanel=inputJComponent();
JComponent queryPanel=queryJComponent();
JComponent sortPanel=sortJComponent();
jTabbedPane.addTab("输入成绩", inputPanel);
jTabbedPane.addTab("查询成绩", queryPanel);
jTabbedPane.addTab("成绩排序", sortPanel);
setLayout(new GridLayout(1,1));
add(jTabbedPane);
jTabbedPane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
setBounds(100, 100, 300, 400);
setVisible(true);
validate();
addJButton.addActionListener(new AddAction());
queryJButton.addActionListener(new QueryAction());
sortJButton.addActionListener(new SortAction());
getConnectDataBase();
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
protected class AddAction implements ActionListener{
public void actionPerformed(ActionEvent e){
String noString;
try {
noString=noJTextField.getText(0, 9);
commandString="INSERT INTO scores VALUES('"+noString+"','"+scoresJTextField.getText()+"')";
statement=connection.createStatement();
statement.execute(commandString);
statement.closeOnCompletion();
alterJComponent(inputPanel, "添加成功！");
statement.closeOnCompletion();
} catch (Exception e2) {
alterJComponent(inputPanel, "学号为9位！请重新输入！\n"+e2.toString()+"");
}
}
}
protected class QueryAction implements ActionListener{
public void actionPerformed(ActionEvent e){
try {
statement=connection.createStatement();
String noString=queryNOJTextField.getText(0, 9);
commandString="SELECT * FROM SCORES WHERE NUMBER='"+noString+"'";
resultSet=statement.executeQuery(commandString);
resultSet.first();
queryJTextArea.append("您查询的学号为 "+resultSet.getString(1)+" 的成绩为 "+resultSet.getString(2)+"\n");
statement.closeOnCompletion();
} catch (Exception e2) {
alterJComponent(queryJPanel, "学号为9位！请重新输入！\n"+e2.toString()+"");
}
}
}
protected class SortAction implements ActionListener{
public void actionPerformed(ActionEvent e){
commandString="SELECT * FROM scores ORDER BY score DESC";
try {
statement=connection.createStatement();
resultSet=statement.executeQuery(commandString);
if(tableModel.getRowCount()>0) {
tableModel=(DefaultTableModel)table.getModel();
tableModel.setRowCount(rows*2);
table.setModel(tableModel);
table.repaint();
}
while (resultSet.next()) {
tableModel.addRow(new Object[]{resultSet.getString(1),resultSet.getString(2)});
}
statement.closeOnCompletion();
}catch (Exception e2) {
alterJComponent(sortJPanel, "错误！\n"+e2.toString()+"");
}
}
}
protected JComponent inputJComponent(){
Box studentLabelBox,studentFieldBox,baseBox;
JLabel nolJLabel=new JLabel("学号");
JLabel scoresJLabel=new JLabel("成绩");
studentLabelBox=Box.createVerticalBox();
studentLabelBox.add(nolJLabel);
studentLabelBox.add(Box.createVerticalGlue());
studentLabelBox.add(scoresJLabel);
studentFieldBox=Box.createVerticalBox();
studentFieldBox.add(noJTextField);
studentFieldBox.add(Box.createVerticalStrut(8));
studentFieldBox.add(scoresJTextField);
baseBox=Box.createHorizontalBox();
baseBox.add(studentLabelBox);
baseBox.add(studentFieldBox);
JPanel boxJPanel=new JPanel(false);
boxJPanel.setLayout(new FlowLayout());
boxJPanel.add(baseBox);
boxJPanel.add(addJButton);
noJTextField.setPreferredSize(dimension);
scoresJTextField.setPreferredSize(dimension);
inputPanel.setLayout(new BorderLayout());
inputPanel.add(boxJPanel,BorderLayout.CENTER);
return inputPanel;
}
protected JComponent queryJComponent(){
JLabel noLabel=new JLabel("学号：");
queryNOJTextField.setPreferredSize(dimension);
queryJTextArea.setEditable(false);
queryJPanel.setLayout(new BorderLayout());
JPanel northPanel=new JPanel(false);
northPanel.add(noLabel);
northPanel.add(queryNOJTextField);
northPanel.add(queryJButton);
queryJTextArea.setAlignmentX(CENTER_ALIGNMENT);
JScrollPane scrollPane=new JScrollPane(queryJTextArea);
queryJPanel.add(scrollPane,BorderLayout.CENTER);
queryJPanel.add(northPanel,BorderLayout.NORTH);
return queryJPanel;
}
protected JComponent sortJComponent(){
sortJPanel.setLayout(new BorderLayout());
table.setEnabled(false);
sortJPanel.add(new JScrollPane(table),BorderLayout.CENTER);
JPanel sortButtonJPanel=new JPanel(false);
sortButtonJPanel.setLayout(new FlowLayout());
sortButtonJPanel.add(sortJButton);
sortJPanel.add(sortButtonJPanel,BorderLayout.NORTH);
return sortJPanel;
}
protected JComponent alterJComponent(JComponent jComponent,String infosString){
JOptionPane jOptionPane=new JOptionPane();
JOptionPane.showMessageDialog(jComponent, infosString);
return jOptionPane;
}
protected void getConnectDataBase(){
try {
try {
Class.forName("com.mysql.jdbc.Driver");
System.out.println("MySQL驱动成功加载！");
} catch (ClassNotFoundException e) {
System.out.println(e);
}
connection=DriverManager.getConnection("jdbc:mysql://localhost/sqlbase?useUnicode=true&characterEncoding=GBK", "root", "");
System.out.println("已成功连接到数据库！");
alterJComponent(inputPanel, "已成功连接到数据库！");
} catch (Exception e) {
System.out.println(e);
alterJComponent(inputPanel, "错误！\n"+e.toString()+"");
}
}
}
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