Java课程设计---修改学生基本信息
1、修改窗体
2、在StudentDao中增加修改学生信息的方法
/**
* 修改的方法
*
* @param student
* @return
* @throws SQLException
*/
public boolean update(Student student) throws SQLException {
DbUtil dbUtil = new DbUtil();
String sql = "update tb_student set name='" + student.getName() + "',sno='"
+ student.getSno() + "',sex='" + student.getSex()
+ "',classname='" + student.getClassName() + "' where id ='"
+ student.getId() + "'";
// 在控制台打印sql语句用于检查
System.out.println(sql);
// 处理并返回
return dbUtil.execute(sql);
}
3、在StudentService中增加修改服务
/**
* 修改学生信息服务
*
* @param student
* @return
* @throws SQLException
*/
public boolean editStudent(Student student) throws SQLException {
StudentDao studentDao = new StudentDao();
return studentDao.update(student);
}
4、给窗体中的表格添加点击事件
表格单击完整代码
table.addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
int row = table.getSelectedRow();
textField_1.setText(table.getValueAt(row, 1) + "");
textField_2.setText(table.getValueAt(row, 2) + "");
String sex = table.getValueAt(row, 3) + "";
if ("男".equals(sex)) {
boy.setSelected(true);
} else if ("女".equals(sex)) {
girl.setSelected(true);
}
}
});
5、提交并处理修改过的内容
btnNewButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//获取学号
String sno = textField_1.getText().trim();
//获取姓名
String name = textField_2.getText().trim();
//获取性别
String sex = "";
if (boy.isSelected()) {
sex = "男";
} else if (girl.isSelected()) {
sex = "女";
}
//获取班级
String className = comboBox.getSelectedItem().toString();
//说明id已经在前面保存了；
//构建窗体
Student student = new Student(id, sno, name, sex, className);
try {
if (service.editStudent(student)) {
JOptionPane.showMessageDialog(null, "修改成功");
} else {
JOptionPane.showMessageDialog(null, "修改失败");
}
} catch (SQLException e1) {
e1.printStackTrace();
}
}
});
6、截图
7、完整代码
package com.student.view;
import java.awt.EventQueue;
import java.sql.SQLException;
import java.util.List;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableModel;
import com.student.model.Student;
import com.student.service.StudentService;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JRadioButton;
import javax.swing.JComboBox;
import javax.swing.DefaultComboBoxModel;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
/*
* 项目名称：
*
* 文件名称为：ShowStudent.java
* 文件创建人：daxiang
*
* @author daxiang
* @version
* @time 2018年6月22日 上午8:03:24
* @copyright daxiang
*/
public class ShowStudent extends JFrame {
private static final long serialVersionUID = 1L;
private JPanel contentPane;
private JTable table;
private JTextField textField;
private JLabel lblNewLabel;
private JLabel lblNewLabel_1;
private JLabel lblNewLabel_2;
private JLabel lblNewLabel_3;
private JTextField textField_1;
private JTextField textField_2;
private JRadioButton boy;
private JRadioButton girl;
private int id;// 保存修改时的ID
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
ShowTable frame = new ShowTable();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public ShowStudent() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 860, 618);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
// 设置无布局
contentPane.setLayout(null);
// 创建滚动面板
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(37, 89, 739, 263);
contentPane.add(scrollPane);
// 创建表格
table = new JTable();
table.addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
int row = table.getSelectedRow();
id = (int) table.getValueAt(row, 0);
textField_1.setText(table.getValueAt(row, 1) + "");
textField_2.setText(table.getValueAt(row, 2) + "");
String sex = table.getValueAt(row, 3) + "";
if ("男".equals(sex)) {
boy.setSelected(true);
} else if ("女".equals(sex)) {
girl.setSelected(true);
}
}
});
// 将表格加载到滚动面板
scrollPane.setViewportView(table);
try {
// 创建服务
StudentService service = new StudentService();
// 查询出所有学生
List<Student> list = service.getStudent();
// 装载数据
fillTable(list);
JLabel label = new JLabel("请输入学生姓名：");
label.setBounds(93, 43, 123, 18);
contentPane.add(label);
textField = new JTextField();
textField.setBounds(242, 40, 169, 24);
contentPane.add(textField);
textField.setColumns(10);
JButton button = new JButton("查 找");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
// 获取查询数据
// textField.getText().trim()获取文本框数据并且去掉空格
List<Student> list1 = service.getStudent(textField
.getText().trim());
// 装载到表格
fillTable(list1);
} catch (SQLException e1) {
e1.printStackTrace();
}
}
});
button.setBounds(477, 39, 113, 27);
contentPane.add(button);
lblNewLabel = new JLabel("学 号");
lblNewLabel.setBounds(86, 383, 52, 18);
contentPane.add(lblNewLabel);
lblNewLabel_1 = new JLabel("姓名");
lblNewLabel_1.setBounds(306, 383, 43, 18);
contentPane.add(lblNewLabel_1);
lblNewLabel_2 = new JLabel("班 级");
lblNewLabel_2.setBounds(86, 438, 52, 18);
contentPane.add(lblNewLabel_2);
lblNewLabel_3 = new JLabel("性别");
lblNewLabel_3.setBounds(516, 383, 43, 18);
contentPane.add(lblNewLabel_3);
textField_1 = new JTextField();
textField_1.setBounds(152, 380, 140, 24);
contentPane.add(textField_1);
textField_1.setColumns(10);
textField_2 = new JTextField();
textField_2.setBounds(363, 380, 123, 24);
contentPane.add(textField_2);
textField_2.setColumns(10);
ButtonGroup buttonGroup = new ButtonGroup();
boy = new JRadioButton("男");
boy.setBounds(571, 379, 52, 27);
contentPane.add(boy);
girl = new JRadioButton("女");
girl.setBounds(639, 379, 52, 27);
contentPane.add(girl);
buttonGroup.add(girl);
buttonGroup.add(boy);
JComboBox<String> comboBox = new JComboBox<String>();
comboBox.setModel(new DefaultComboBoxModel<String>(new String[] {
"计科1班", "计科2班", "计科3班", "计科4班" }));
comboBox.setBounds(152, 435, 140, 24);
contentPane.add(comboBox);
JButton btnNewButton = new JButton("修 改");
// 处理修改
btnNewButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
// 获取学号
String sno = textField_1.getText().trim();
// 获取姓名
String name = textField_2.getText().trim();
// 获取性别
String sex = "";
if (boy.isSelected()) {
sex = "男";
} else if (girl.isSelected()) {
sex = "女";
}
// 获取班级
String className = comboBox.getSelectedItem().toString();
// 说明id已经在前面保存了；
// 构建窗体
Student student = new Student(id, sno, name, sex, className);
try {
if (service.editStudent(student)) {
JOptionPane.showMessageDialog(null, "修改成功");
} else {
JOptionPane.showMessageDialog(null, "修改失败");
}
} catch (SQLException e1) {
e1.printStackTrace();
}
}
});
btnNewButton.setBounds(346, 434, 113, 27);
contentPane.add(btnNewButton);
JButton btnNewButton_1 = new JButton("删除");
btnNewButton_1.setBounds(516, 434, 113, 27);
contentPane.add(btnNewButton_1);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
setVisible(true);
}
/**
* 表格装载数据
*
* @param list
*/
public void fillTable(List<Student> list) {
// 将默认的加载数据去掉，重新定义个表头
String[] head = new String[] { "序号", "学号", "姓名", "性别", "班级" };
// 创建一个二维数组，5表示列数
Object[][] data = new Object[list.size()][5];
// 遍历
for (int i = 0; i < list.size(); i++) {
data[i][0] = list.get(i).getId();
data[i][1] = list.get(i).getSno();
data[i][2] = list.get(i).getName();
data[i][3] = list.get(i).getSex();
data[i][4] = list.get(i).getClassName();
}
// 将数据和表头封装
DefaultTableModel datamoModel = new DefaultTableModel(data, head);
// 将封装好的数据加载
table.setModel(datamoModel);
}
}
