java（swing）+mysql实现学生信息管理系统

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.table.AbstractTableModel;
import javax.swing.text.BadLocationException;
/*
DROP DATABASE IF EXISTS `myproject`;
CREATE DATABASE myproject DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
USE ABC;
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
DROP TABLE IF EXISTS `student`;
CREATE TABLE `student` (
`id` varchar(36) NOT NULL,
`name` varchar(36) NOT NULL,
`age` varchar(36) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
SET FOREIGN_KEY_CHECKS = 1;

*
*
*/
public class Test extends JFrame {
private static final long serialVersionUID = 1L;
private JTable table;
private JPanel panel;
private JScrollPane scrollpane;
private JButton button1, button2, button3;
private JTextArea text1, text2, text3;
private List<Student> stu;

public Test() throws BadLocationException, SQLException {
super("学生信息");
this.setSize(500, 340);
this.add(getJScrollPane(stu), BorderLayout.CENTER);
this.add(getJPanel(), BorderLayout.SOUTH);
this.setResizable(true);
this.setLocation(300, 300);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

// 设置JScrollPane方法
private JScrollPane getJScrollPane(List<Student> stu) throws SQLException {
if (scrollpane == null) {
scrollpane = new JScrollPane();
scrollpane.setViewportView(getJTable(stu));
}
return scrollpane;
}

// 设置JPanel方法
private JPanel getJPanel() {
if (panel == null) {
panel = new JPanel();
panel.setLayout(new GridLayout(2, 3));
text1 = new JTextArea();
text2 = new JTextArea();
text3 = new JTextArea();
button1 = new JButton("添加");
button2 = new JButton("删除");
button3 = new JButton("更新");
button1.addActionListener(new insert());
button2.addActionListener(new delete());
button3.addActionListener(new update());
text1.setBorder(BorderFactory.createLineBorder(Color.gray, 2));
text2.setBorder(BorderFactory.createLineBorder(Color.gray, 2));
text3.setBorder(BorderFactory.createLineBorder(Color.gray, 2));
text1.setFont(new Font("宋体", Font.BOLD, 16));
text2.setFont(new Font("宋体", Font.BOLD, 16));
text3.setFont(new Font("宋体", Font.BOLD, 16));
text1.setText("id");
text2.setText("name");
text3.setText("age");
panel.add(text1);
panel.add(text2);
panel.add(text3);
panel.add(button1);
panel.add(button2);
panel.add(button3);

}
return panel;

}

// 设置Jtable方法
private void setJTable(JTable table) {
table.setFont(new Font("宋体", Font.BOLD, 18));
table.setRowHeight(30);
}

// 获取Jtable对象方法（该方法具体就是获得jtable对象的时候 一并从数据取出学生信息并放入Jtable表格中）
private JTable getJTable(List<Student> stu) throws SQLException {
if (table == null) {
JDBCDaoImpl jdbc = new JDBCDaoImpl();
ResultSet rs = jdbc.search();
stu = select(rs);
jdbc.closeConnection();
table = new JTable(new Table(stu));
setJTable(table);
}
return table;
}

// 设置学生信息方法（该方法是用户增加 删除 更新用户操作的具体实现方法 包含了完整性检查）
private Student setStu() {
if (text1.getText().equals("") || text2.getText().equals("") || text3.getText().equals("")) {
return null;
} else {
Student sd = new Student();
sd.setId(text1.getText());
sd.setName(text2.getText());
sd.setAge(text3.getText());
return sd;

}

}

// 重置输入框为空
private void resetText() {
text1.setText("");
text2.setText("");
text3.setText("");
}

// 刷新学生信息方法（该方法是重新读取数据库学生的信息 然后返回一个学生的集合
117f7
用于刷新Jtable表格对象中的数据）
private List<Student> select(ResultSet rs) throws SQLException {
List<Student> st = new ArrayList<Student>();
while (rs.next()) {
Student s = new Student();
s.setId(rs.getString(1));
s.setName(rs.getString(2));
s.setAge(rs.getString(3));
st.add(s);
}
return st;

}

// 添加按钮-监听器（该方法是对添加按钮实现的具体方法 ）
class insert implements ActionListener {

@Override
public void actionPerformed(ActionEvent e) {
stu = new ArrayList<Student>();
Student sd = new Student();
JDBCDaoImpl jdbc = new JDBCDaoImpl();
sd = setStu();
if (sd != null) {
jdbc.insert(sd);
ResultSet rs = jdbc.search();
try {
stu = select(rs);
} catch (SQLException e1) {
e1.printStackTrace();
}
jdbc.closeConnection();
JTable table = new JTable(new Table(stu));//新建一个Jtable 对象 用来盛放增加后的学生信息
setJTable(table);//设置Jtable信息
Test.this.scrollpane.setViewportView(table);//把Jtable设置到Panel
resetText();
} else {
JOptionPane.showMessageDialog(Test.this, "输入数据不完整");

}

}

}

// 删除按钮-监听器（该方法是对删除按钮实现的具体方法）
class delete implements ActionListener {

@Override
public void actionPerformed(ActionEvent e) {
stu = new ArrayList<Student>();
Student sd = new Student();
JDBCDaoImpl jdbc = new JDBCDaoImpl();
sd = setStu();
if (sd != null) {
jdbc.delete(sd);
ResultSet rs = jdbc.search();
try {
stu = select(rs);
} catch (SQLException e1) {
e1.printStackTrace();
}
jdbc.closeConnection();
JTable table = new JTable(new Table(stu));//新建一个Jtable 对象 用来盛放增加后的学生信息
setJTable(table);//设置Jtable信息
Test.this.scrollpane.setViewportView(table);//把Jtable设置到Panel
resetText();
} else {
JOptionPane.showMessageDialog(Test.this, "输入数据不完整");

}

}

}

// 更新按钮-监听器（该方法是对更新按钮实现的具体方法）
class update implements ActionListener {

@Override
public void actionPerformed(ActionEvent e) {
stu = new ArrayList<Student>();
Student sd = new Student();
JDBCDaoImpl jdbc = new JDBCDaoImpl();
sd = setStu();
if (sd != null) {
jdbc.update(sd);
ResultSet rs = jdbc.search();
try {
stu = select(rs);
} catch (SQLException e1) {
e1.printStackTrace();
}
jdbc.closeConnection();
JTable table = new JTable(new Table(stu));//新建一个Jtable 对象 用来盛放增加后的学生信息
setJTable(table);//设置Jtable信息
Test.this.scrollpane.setViewportView(table);//把Jtable设置到Panel
resetText();
} else {
JOptionPane.showMessageDialog(Test.this, "输入数据不完整");

}

}

}

// Student类 （用于封装数据信息和数据库表进行映射）
public class Student {
// 学生的id name age信息
private String id;
private String name;
private String age;

// get&set方法
public String getId() {
return id;
}

public void setId(String id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getAge() {
return age;
}

public void setAge(String age) {
this.age = age;
}
}

// JTable 表模式类 （JTable对象 初始化的时候通过 这个Table获取表格的行数、列数、列标题、以及每个单元格存放的数据 具体使用原因放在开头的备注了）
public class Table extends AbstractTableModel {
List<Student> stu = new ArrayList<Student>();

public Table(List s) {
this.stu = s;

}
public List<Student> getStu() {
return stu;
}

public void setStu(List<Student> stu) {
this.stu = stu;
}

@Override
// 获取行数
public int getRowCount() {
return stu.size();
}

@Override
// 获取列数
public int getColumnCount() {
// TODO Auto-generated method stub
return 3;
}

@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
return true;
}

@Override
// 获取列名字
public String getColumnName(int col) {
String res = "";
switch (col) {
case 0:
res = "ID";
break;
case 1:
res = "Name";
break;
case 2:
res = "Age";
break;
default:
break;
}
return res;
}

@Override
// 获取具体值
public Object getValueAt(int rowIndex, int columnIndex) {
// TODO Auto-generated method stub
Object res = "";
Student temp = stu.get(rowIndex);
switch (columnIndex) {
case 0:
res = temp.getId();
break;
case 1:
res = temp.getName();
break;
case 2:
res = temp.getAge();
break;
default:
break;
}
return res;
}

}

// JDBCDAO类 配置连接数据的信息，链接释放操作和基本增删改查操作
public class JDBCDaoImpl {
String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/test1?useUnicode=true&characterEncoding=utf-8&useSSL=false";
String user = "root";
String passwd = "123456";
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;

// 数据库连接开始
public Connection getConnection() {
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(url, user, passwd);
stmt = conn.createStatement();
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}

// 数据库连接释放
public void closeConnection() {
if (rs != null) {
try {
rs.close();
stmt.close();
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

if (rs == null) {
try {
stmt.close();
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}

// 查找操作
public ResultSet search() {
getConnection();
try {
String sql = "SELECT * FROM student";
rs = stmt.executeQuery(sql);
} catch (SQLException e) {
e.printStackTrace();
}
return rs;
}

// 添加操作
public void insert(Student sd) {
// TODO Auto-generated method stub
getConnection();
try {
String sql = "INSERT INTO student(id,name,age)" + "VALUES('" + sd.getId() + "','" + sd.getName() + "','"
+ sd.getAge() + "')";
int count = stmt.executeUpdate(sql);
} catch (SQLException e) {
e.printStackTrace();
}
}

// 删除操作
public void delete(Student sd) {
// TODO Auto-generated method stub
getConnection();
try {
String sql = "DELETE FROM student WHERE id = '" + sd.getId() + "'";
int count = stmt.executeUpdate(sql);
} catch (SQLException e) {
e.printStackTrace();
}
}

// 更新操作
public void update(Student sd) {
// TODO Auto-generated method stub
getConnection();
try {
String sql = "UPDATE student SET name='" + sd.getName() + "',age= '" + sd.getAge() + "'WHERE id = '"
+ sd.getId() + "'";
int count = stmt.executeUpdate(sql);
} catch (SQLException e) {
e.printStackTrace();
}
}

}

// main 方法
public static void main(String[] args) throws BadLocationException, SQLException {
new Test().setVisible(true);

}
}