这个就有点神经了，数据库本来就是直接写操作语句，整个要求图形化操作就离谱

要求

编写通过Java访问数据库的程序。
例如：成绩管理、图书管理、货物管理、宿舍管理、课程管理等等，请自由选择一个信息管理类的系统，不能选择教材上的例子。通过Java程序访问数据库，实现显示、查找、插入、删除、修改等操作。要求用可视化图形界面输入和显示结果。具体界面设计和数据库内容请自由发挥。

参考

代码

• JDBCUtils.java

package com.binbla.jdbc;
import java.io.InputStream;
import java.sql.*;
import java.util.Properties;

/**
 * >Author: BinBla
 * >ProjectName myTestJavaProject
 * >packageName com.binbla.jdbc
 * >Date 12/4/20
 */
public class JDBCUtils {
   private static String url,username,password;
    static {
        InputStream inputStream= JDBCUtils.class.getClassLoader().getResourceAsStream("db.properties");
        Properties properties=new Properties();
        try {
            properties.load(inputStream);
            String driver = properties.getProperty("driver");
            url = properties.getProperty("url");
            username = properties.getProperty("username");
            password = properties.getProperty("password");
            // 加载驱动
            Class.forName(driver);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    // 获取连接对象
    public static Connection getConnection(){
        try {
            return DriverManager.getConnection(url,username,password);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }
}

• db.properties

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://192.168.50.150:3306/myJavaTest
username=myJavaTest
password=tBSdnazE46rWyLJ

• JDBC.java

package com.binbla.jdbc;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Objects;

/**
 * >Author:     BinBla
 * >ProjectName myTestJavaProject
 * >PackageName com.binbla.jdbc
 * >Date        12/6/20
 * 关于JTable    https://blog.csdn.net/xietansheng/article/details/78079806
 */
public class JDBCGui extends JFrame implements ActionListener {

    JScrollPane tablePane, centerTablePane, southPanel;// 用来显示表格的容器
    Object[] name;// 列名
    Object[][] valueObjects, centerValueObject;// 列数据
    JPanel northPanel, northRightButtonPanel, northRightButtonPanelHead, northRightButtonPanelSon, centerPanel, centerRightButtonPanel;
    JTable northTable, centerTable;
    JButton[] updateButton, deleteButton;
    JButton insertButton, selectButton, getDataButton;
    JTextArea console;
    Connection connection;
    Statement statement;
    ResultSet resultSet;

    JDBCGui(String name) {
        super(name);
        init();
    }

    private void init() {
        //初始化
        initNorthPanel();
        initCenterPanel();
        initSouthPanel();
        getContentPane().add(northPanel, BorderLayout.NORTH);
        getContentPane().add(centerPanel, BorderLayout.CENTER);
        getContentPane().add(southPanel, BorderLayout.SOUTH);
        //布置面板
        pack();
        setVisible(true);
        setResizable(false);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        validate();
        checkConnection();
    }

    private void initNorthPanel() {
        //上半部分布局
        northPanel = new JPanel(new BorderLayout());
        name = new Object[]{"ID", "NAME", "CLASS", "SCORE"};
        valueObjects = new Object[5][4];
        northTable = new JTable(valueObjects, name);
        northTable.setRowHeight(20);
        tablePane = new JScrollPane(northTable);
        tablePane.setPreferredSize(new Dimension(400, 100));
        northTable.getTableHeader().setReorderingAllowed(false);//不可拖动表头
        northTable.getTableHeader().setResizingAllowed(false);//不可头间拖动来调整各列的大小
        northPanel.add(tablePane, BorderLayout.WEST);//添加左边表

        northRightButtonPanel = new JPanel();
        northRightButtonPanel.setLayout(new BorderLayout());
        northRightButtonPanel.setPreferredSize(new Dimension(120, 124));
        getDataButton = new JButton("获取表单");
        getDataButton.setSize(1200, 20);
        getDataButton.addActionListener(this);
        getDataButton.setActionCommand("o0");
        northRightButtonPanelHead = new JPanel(new GridLayout(1, 1));
        northRightButtonPanelHead.add(getDataButton);
        northRightButtonPanelHead.setPreferredSize(new Dimension(120, 21));//设置获取表单按钮的高度
        northRightButtonPanel.add(northRightButtonPanelHead, BorderLayout.NORTH);

        northRightButtonPanelSon = new JPanel(new GridLayout(5, 2));
        updateButton = new JButton[5];
        deleteButton = new JButton[5];
        for (int i = 0; i < 5; ++i) {
            updateButton[i] = new JButton("更新");
            updateButton[i].setActionCommand("u" + i);
            updateButton[i].addActionListener(this);
            northRightButtonPanelSon.add(updateButton[i]);
            deleteButton[i] = new JButton("删除");
            deleteButton[i].setActionCommand("d" + i);
            deleteButton[i].addActionListener(this);
            northRightButtonPanelSon.add(deleteButton[i]);
        }
        northRightButtonPanel.add(northRightButtonPanelSon, BorderLayout.CENTER);//添加更新和删除面板

        northPanel.add(northRightButtonPanel, BorderLayout.EAST);//把右边的按钮添加进面板
    }

    private void initCenterPanel() {
        //中间部分布局
        centerPanel = new JPanel(new BorderLayout());

        centerValueObject = new Object[1][4];
        centerTable = new JTable(centerValueObject, name);
        centerTable.setRowHeight(20);
        centerTablePane = new JScrollPane(centerTable);
        centerTablePane.setPreferredSize(new Dimension(400, 44));
        centerTable.getTableHeader().setReorderingAllowed(false);//不可拖动表头
        centerTable.getTableHeader().setResizingAllowed(false);//不可头间拖动来调整各列的大小
        centerPanel.add(centerTablePane, BorderLayout.WEST);

        centerRightButtonPanel = new JPanel();
        centerRightButtonPanel.setLayout(new GridLayout(1, 2));
        selectButton = new JButton("查询");
        selectButton.setActionCommand("s0");
        selectButton.addActionListener(this);
        insertButton = new JButton("插入");
        insertButton.setActionCommand("i0");
        insertButton.addActionListener(this);
        centerRightButtonPanel.add(selectButton);
        centerRightButtonPanel.add(insertButton);
        centerPanel.add(centerRightButtonPanel, BorderLayout.EAST);

    }

    private void initSouthPanel() {
        //下面板布局
        console = new JTextArea();
        console.setRows(7);
        console.setEditable(false);
        console.setBackground(Color.pink);
        southPanel = new JScrollPane(console);
    }

    private void updateTable(String s) {//查
        //查询语句
        if (checkConnection()) {
            cleanNorthTable();//清空表格
            try {
                resultSet = statement.executeQuery(s);
                int i = 0;
                while (resultSet.next() && i < 5) {
                    int j = 0;
                    northTable.getModel().setValueAt(resultSet.getString("id"), i, j++);
                    northTable.getModel().setValueAt(resultSet.getString("uname"), i, j++);
                    northTable.getModel().setValueAt(resultSet.getString("class"), i, j++);
                    northTable.getModel().setValueAt(resultSet.getInt("score"), i, j);
                    ++i;
                }
                northTable.repaint();
            } catch (SQLException e) {
                console.append(e.toString());
            }
        }
    }

    private void updateServer(String str) {
        //执行插入、更新、删除语句
        if (checkConnection()) {
            try {
                statement.execute(str);
                console.append("语句已执行");
            } catch (SQLException e) {
                console.append(e.toString() + "\n");
            }
        }
        northTable.repaint();
    }


    private String buildStatement(int i, JTable tag, int op) {
        // 构造mysql语句
        String str = "";
        Object id = tag.getModel().getValueAt(i, 0);
        Object uname = tag.getModel().getValueAt(i, 1);
        Object classID = tag.getModel().getValueAt(i, 2);
        Object score = tag.getModel().getValueAt(i, 3);
        if (id != null) {
            id = id.toString();
        }
        if (uname != null) {
            uname = uname.toString();
        }
        if (classID != null) {
            classID = classID.toString();
        }
        if (score != null) {
            score = score.toString();
        }
        switch (op) {
            case 0:
                str = "update `student` set `uname`='" + uname + "',class='" + classID + "',score='" + score + "' where student.id='" + id + "'";
                break;//增
            case 1:
                str = "delete from student where id='" + id + "'";
                break;//删
            case 2:
                str = "select * from student where ";
                boolean start = true;
                if (id != null && !Objects.equals(id, "")) {
                    str += "id='" + id + "'";
                    start = false;
                }
                if (uname != null && !Objects.equals(uname, "")) {
                    if (!start) {
                        str += " and ";
                    }
                    str += "uname='" + uname + "'";
                    start = false;
                }
                if (classID != null && !Objects.equals(classID, "")) {
                    if (!start) {
                        str += " and ";
                    }
                    str += "class='" + classID + "'";
                    start = false;
                }
                if (score != null && !Objects.equals(score, "")) {
                    if (!start) {
                        str += " and ";
                    }
                    str += "score='" + score + "'";
                    start = false;
                }
                if (start) {
                    return "";
                }
                break;//改
            case 3:
                str = "insert into student(id,uname,class,score) values('" + id + "','" + uname + "','" + classID + "','" + score + "')";
                break;//查
        }
        console.append(str + "\n");
        return str;
    }
    private void cleanNorthTable(){
        for(int i=0;i<5;++i){
            for(int j=0;j<4;++j){
                northTable.getModel().setValueAt(null,i,j);
            }
        }
        northTable.repaint();
    }


    private boolean checkConnection() {
        // 验证和连接数据库
        if (connection == null) {
            console.append("正在尝试验证数据库账户和密码...\n");
            try {
                connection = JDBCUtils.getConnection();
                console.append("验证成功\n");
            } catch (Exception e) {
                console.append(e.toString());
                console.append("验证失败\n");
                return false;
            }
        }
        if (statement == null) {
            console.append("正在尝试建立与数据库的连接...\n");
            try {
                statement = connection.createStatement();
                console.append("连接成功\n");
            } catch (Exception e) {
                console.append(e.toString());
                console.append("连接失败\n");
                return false;
            }
        }
        return true;
    }

    @Override
    public void actionPerformed(ActionEvent actionEvent) {
        // 按钮的监视器操作
        String commands = actionEvent.getActionCommand();
        char[] action = commands.toCharArray();
        int tag = Integer.parseInt(commands.replaceAll("[udiso]", ""));

        switch (action[0]) {
            case 'u'://更新
                updateServer(buildStatement(tag, northTable, 0));
                break;
            case 'd'://删除
                updateServer(buildStatement(tag, northTable, 1));
                break;
            case 's'://查询
                updateTable(buildStatement(tag, centerTable, 2));
                break;
            case 'i'://插入
                updateServer(buildStatement(tag, centerTable, 3));
                break;
            case 'o'://获取
                updateTable("select * from student");
                break;
        }
    }
    public static void main(String[] args) {
        new JDBCGui("java_6");
    }
}