Java执行代码：
package fisrter;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;
public class DatabaseCourseDesign extends JFrame implements ActionListener {
// 定义组件
JLabel jLStudentInfoTable = null;//学生信息表
JLabel jLSelectQueryField = null;//选择查询字段
JLabel jLEqual = null;//=
JLabel jLSNo = null;//学号
JLabel jLSName = null;//姓名
JLabel jLSSex = null;//性别
JLabel jLSAge = null;//年龄
JLabel jLSSpecialty = null;//专业
JLabel jLSAddress = null;//住址
JTextField jTFQueryField = null;//查询字段
JTextField jTFSNo = null;//学号
JTextField jTFSName = null;//姓名
JTextField jTFSSex = null;//性别
JTextField jTFSAge = null;//年龄
JTextField jTFSSpecialty = null;//专业
JTextField jTFSAddress = null;//住址
JButton jBQuery = null;//查询
JButton jBQueryAll = null;//查询所有记录
JButton jBInsert = null;//插入
JButton jBUpdate = null;//更新
JButton jBDeleteCurrentRecord = null;//删除当前记录
JButton jBDeleteAllRecords = null;//删除所有记录
//JComboBox jCBSelectQueryField = null;
JComboBox<String> jCBSelectQueryField = null;//查询字段
JPanel jP1, jP2,jP3,jP4,jP5,jP6 = null;
JPanel jPTop, jPBottom = null;
DefaultTableModel studentTableModel = null;
JTable studentJTable = null;
JScrollPane studentJScrollPane = null;
Vector studentVector = null;
Vector titleVector = null;
private static DbProcess dbProcess;
String SelectQueryFieldStr = "学号";
// 构造函数
public DatabaseCourseDesign() {
// 创建组件
jLStudentInfoTable = new JLabel("学生信息表");
jLSelectQueryField = new JLabel("选择查询字段");
jLEqual = new JLabel(" = ");
jLSNo = new JLabel("学号");
jLSName = new JLabel("姓名");
jLSSex = new JLabel("性别");
jLSAge = new JLabel("年龄");
jLSSpecialty = new JLabel("专业");
jLSAddress = new JLabel("住址");
jTFQueryField = new JTextField(10);//查询字段
jTFSNo = new JTextField(10);//学号
jTFSName = new JTextField(10);//姓名
jTFSSex = new JTextField(10);//性别
jTFSAge = new JTextField(10);//年龄
jTFSSpecialty = new JTextField(10);//专业
jTFSAddress = new JTextField(10);//住址
jBQuery = new JButton("查询");
jBQueryAll = new JButton("查询所有记录");
jBInsert = new JButton("插入");
jBUpdate = new JButton("更新");
jBDeleteCurrentRecord = new JButton("删除当前记录");
jBDeleteAllRecords = new JButton("删除所有记录");
// 设置监听
jBQuery.addActionListener(this);
jBQueryAll.addActionListener(this);
jBInsert.addActionListener(this);
jBUpdate.addActionListener(this);
jBDeleteCurrentRecord.addActionListener(this);
jBDeleteAllRecords.addActionListener(this);
jCBSelectQueryField = new JComboBox<String>();//查询字段
jCBSelectQueryField.addItem("学号");
jCBSelectQueryField.addItem("姓名");
jCBSelectQueryField.addItem("性别");
jCBSelectQueryField.addItem("年龄");
jCBSelectQueryField.addItem("专业");
jCBSelectQueryField.addItem("住址");
jCBSelectQueryField.addItemListener(new ItemListener() {
//下拉框事件监听
public void itemStateChanged(ItemEvent event) {
switch (event.getStateChange()) {
case ItemEvent.SELECTED:
SelectQueryFieldStr = (String) event.getItem();
System.out.println("选中：" + SelectQueryFieldStr);
break;
case ItemEvent.DESELECTED:
System.out.println("取消选中：" + event.getItem());
break;
}
}
});
studentVector = new Vector();
titleVector = new Vector();
// 定义表头
titleVector.add("学号");
titleVector.add("姓名");
titleVector.add("性别");
titleVector.add("年龄");
titleVector.add("专业");
titleVector.add("住址");
//studentTableModel = new DefaultTableModel(tableTitle, 15);
studentJTable = new JTable(studentVector, titleVector);
studentJTable.setPreferredScrollableViewportSize(new Dimension(450,160));
studentJScrollPane = new JScrollPane(studentJTable);
//分别设置水平和垂直滚动条自动出现
studentJScrollPane.setHorizontalScrollBarPolicy(
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
studentJScrollPane.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
//为表格添加监听器
studentJTable.addMouseListener(new MouseAdapter()
{
public void mouseClicked(MouseEvent e)
{
int row = ((JTable) e.getSource()).rowAtPoint(e.getPoint()); // 获得行位置
System.out.println("mouseClicked(). row = " + row);
Vector v = new Vector();
v = (Vector) studentVector.get(row);
jTFSNo.setText((String) v.get(0));// 学号
jTFSName.setText((String) v.get(1));// 姓名
jTFSSex.setText((String) v.get(2));// 性别
jTFSAge.setText(Integer.toString((int) v.get(3)));// 年龄
jTFSSpecialty.setText((String) v.get(4));// 专业
jTFSAddress.setText((String) v.get(5));// 住址
}
});
jP1 = new JPanel();
jP2 = new JPanel();
jP3 = new JPanel();
jP4 = new JPanel();
jP5 = new JPanel();
jP6 = new JPanel();
jPTop = new JPanel();
jPBottom = new JPanel();
jP1.add(jLStudentInfoTable,BorderLayout.SOUTH);
jP2.add(studentJScrollPane);
jP3.add(jLSelectQueryField);
jP3.add(jCBSelectQueryField);
jP3.add(jLEqual);
jP3.add(jTFQueryField);
jP3.add(jBQuery);
jP3.add(jBQueryAll);
jP3.setLayout(new FlowLayout(FlowLayout.LEFT));
jP3.setPreferredSize(new Dimension(20,20));
jP4.add(jLSNo);
jP4.add(jTFSNo);
jP4.add(jLSName);
jP4.add(jTFSName);
jP4.add(jLSSex);
jP4.add(jTFSSex);
jP4.setLayout(new FlowLayout(FlowLayout.LEFT));
jP4.setPreferredSize(new Dimension(20,20));
jP5.add(jLSAge);
jP5.add(jTFSAge);
jP5.add(jLSSpecialty);
jP5.add(jTFSSpecialty);
jP5.add(jLSAddress);
jP5.add(jTFSAddress);
jP5.setLayout(new FlowLayout(FlowLayout.LEFT));
jP5.setPreferredSize(new Dimension(20,20));
jP6.add(jBInsert);
jP6.add(jBUpdate);
jP6.add(jBDeleteCurrentRecord);
jP6.add(jBDeleteAllRecords);
jP6.setLayout(new FlowLayout(FlowLayout.LEFT));
jP6.setPreferredSize(new Dimension(20,20));
jPTop.add(jP1);
jPTop.add(jP2);
jPBottom.setLayout(new GridLayout(4, 1));
jPBottom.add(jP3);
jPBottom.add(jP4);
jPBottom.add(jP5);
jPBottom.add(jP6);
this.add("North", jPTop);
this.add("South", jPBottom);
this.setLayout(new GridLayout(2, 1));
this.setTitle("学生管理系统");
this.setSize(500, 500);
this.setLocation(150, 150);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
this.setResizable(false);
dbProcess = new DbProcess();
}
@Override
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand().equals("查询")
&& !jTFQueryField.getText().isEmpty()){
System.out.println("actionPerformed(). 查询");
String sQueryField = jTFQueryField.getText().trim();
queryProcess(sQueryField);
jTFQueryField.setText("");
}else if(e.getActionCommand().equals("查询所有记录")) {
System.out.println("actionPerformed(). 查询所有记录");
queryAllProcess();
}else if(e.getActionCommand().equals("插入")
&& !jTFSNo.getText().isEmpty()
&& !jTFSName.getText().isEmpty()
&& !jTFSSex.getText().isEmpty()
&& !jTFSAge.getText().isEmpty()
&& !jTFSSpecialty.getText().isEmpty()
&& !jTFSAddress.getText().isEmpty()){
System.out.println("actionPerformed(). 插入");
insertProcess();
}else if(e.getActionCommand().equals("更新")
&& !jTFSNo.getText().isEmpty()
&& !jTFSName.getText().isEmpty()
&& !jTFSSex.getText().isEmpty()
&& !jTFSAge.getText().isEmpty()
&& !jTFSSpecialty.getText().isEmpty()
&& !jTFSAddress.getText().isEmpty()){
System.out.println("actionPerformed(). 更新");
updateProcess();
}else if(e.getActionCommand().equals("删除当前记录")){
System.out.println("actionPerformed(). 删除当前记录");
deleteCurrentRecordProcess();
}else if(e.getActionCommand().equals("删除所有记录")){
System.out.println("actionPerformed(). 删除所有记录");
deleteAllRecordsProcess();
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
DatabaseCourseDesign getcon = new DatabaseCourseDesign();
}
public void queryProcess(String sQueryField)
{
try{
// 建立查询条件
String sql = "select * from student where ";
String queryFieldStr = jCBSelectQueryFieldTransfer(SelectQueryFieldStr);
if(queryFieldStr.equals("sAge")){
//int sAge.
sql = sql + queryFieldStr;
sql = sql + " = " + sQueryField;
}else{
sql = sql + queryFieldStr;
sql = sql + " = ";
sql = sql + "'" + sQueryField + "';";
}
System.out.println("queryProcess(). sql = " + sql);
dbProcess.connect();
ResultSet rs = dbProcess.executeQuery(sql);
// 将查询获得的记录数据，转换成适合生成JTable的数据形式
studentVector.clear();
while(rs.next()){
Vector v = new Vector();
v.add(rs.getString("sNo"));
v.add(rs.getString("sName"));
v.add(rs.getString("sSex"));
v.add(Integer.valueOf(rs.getInt("sAge")));
v.add(rs.getString("sSpecialty"));
v.add(rs.getString("sAddress"));
studentVector.add(v);
}
studentJTable.updateUI();
dbProcess.disconnect();
}catch(SQLException sqle){
System.out.println("sqle = " + sqle);
JOptionPane.showMessageDialog(null,
"数据操作错误","错误",JOptionPane.ERROR_MESSAGE);
}catch(Exception e){
System.out.println("e = " + e);
JOptionPane.showMessageDialog(null,
"数据操作错误","错误",JOptionPane.ERROR_MESSAGE);
}
}
public void queryAllProcess()
{
try{
// 建立查询条件
String sql = "select * from student;";
System.out.println("queryAllProcess(). sql = " + sql);
dbProcess.connect();
ResultSet rs = dbProcess.executeQuery(sql);
// 将查询获得的记录数据，转换成适合生成JTable的数据形式
studentVector.clear();
while(rs.next()){
Vector v = new Vector();
v.add(rs.getString("sNo"));
v.add(rs.getString("sName"));
v.add(rs.getString("sSex"));
v.add(Integer.valueOf(rs.getInt("sAge")));
v.add(rs.getString("sSpecialty"));
v.add(rs.getString("sAddress"));
studentVector.add(v);
}
studentJTable.updateUI();
dbProcess.disconnect();
}catch(SQLException sqle){
System.out.println("sqle = " + sqle);
JOptionPane.showMessageDialog(null,
"数据操作错误","错误",JOptionPane.ERROR_MESSAGE);
}
}
public void insertProcess()
{
String sNo = jTFSNo.getText().trim();
String sName = jTFSName.getText().trim();
String sSex = jTFSSex.getText().trim();
String sAge = jTFSAge.getText().trim();
String sSpecialty = jTFSSpecialty.getText().trim();
String sAddress = jTFSAddress.getText().trim();
// 建立插入条件
String sql = "insert into student values('";
sql = sql + sNo + "','";
sql = sql + sName + "','";
sql = sql + sSex + "',";
sql = sql + sAge + ",'";
sql = sql + sSpecialty + "','";
sql = sql + sAddress + "');";
System.out.println("insertProcess(). sql = " + sql);
try{
if (dbProcess.executeUpdate(sql) < 1) {
System.out.println("insertProcess(). insert database failed.");
}
}catch(Exception e){
System.out.println("e = " + e);
JOptionPane.showMessageDialog(null,
"数据操作错误","错误",JOptionPane.ERROR_MESSAGE);
}
queryAllProcess();
}
public void updateProcess()
{
String sNo = jTFSNo.getText().trim();
String sName = jTFSName.getText().trim();
String sSex = jTFSSex.getText().trim();
String sAge = jTFSAge.getText().trim();
String sSpecialty = jTFSSpecialty.getText().trim();
String sAddress = jTFSAddress.getText().trim();
// 建立更新条件
String sql = "update student set sName = '";
sql = sql + sName + "', sSex = '";
sql = sql + sSex + "', sAge = ";
sql = sql + sAge + ", sSpecialty = '";
sql = sql + sSpecialty + "', sAddress = '";
sql = sql + sAddress + "'";
sql = sql + " WHERE sNo = '" + sNo + "';";
System.out.println("updateProcess(). sql = " + sql);
try{
if (dbProcess.executeUpdate(sql) < 1) {
System.out.println("updateProcess(). update database failed.");
}
}catch(Exception e){
System.out.println("e = " + e);
JOptionPane.showMessageDialog(null,
"数据操作错误","错误",JOptionPane.ERROR_MESSAGE);
}
queryAllProcess();
}
public void deleteCurrentRecordProcess()
{
String sNo = jTFSNo.getText().trim();
// 建立删除条件
String sql = "delete from student where sNo = '" + sNo + "';";
System.out.println("deleteCurrentRecordProcess(). sql = " + sql);
try{
if (dbProcess.executeUpdate(sql) < 1) {
System.out.println("deleteCurrentRecordProcess(). delete database failed.");
}
}catch(Exception e){
System.out.println("e = " + e);
JOptionPane.showMessageDialog(null,
"数据操作错误","错误",JOptionPane.ERROR_MESSAGE);
}
queryAllProcess();
}
public void deleteAllRecordsProcess()
{
// 建立删除条件
String sql = "delete from student;";
System.out.println("deleteAllRecordsProcess(). sql = " + sql);
try{
if (dbProcess.executeUpdate(sql) < 1) {
System.out.println("deleteAllRecordsProcess(). delete database failed.");
}
}catch(Exception e){
System.out.println("e = " + e);
JOptionPane.showMessageDialog(null,
"数据操作错误","错误",JOptionPane.ERROR_MESSAGE);
}
queryAllProcess();
}
public String jCBSelectQueryFieldTransfer(String InputStr)
{
String outputStr = "";
System.out.println("jCBSelectQueryFieldTransfer(). InputStr = " + InputStr);
if(InputStr.equals("学号")){
outputStr = "sNo";
}else if(InputStr.equals("姓名")){
outputStr = "sName";
}else if(InputStr.equals("性别")){
outputStr = "sSex";
}else if(InputStr.equals("年龄")){
outputStr = "sAge";
}else if(InputStr.equals("专业")){
outputStr = "sSpecialty";
}else if(InputStr.equals("住址")){
outputStr = "sAddress";
}
System.out.println("jCBSelectQueryFieldTransfer(). outputStr = " + outputStr);
return outputStr;
}
}