Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

Java 学生信息管理系统

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1. 项目概述

这是一个学生信息管理系统,学生信息主要包括:学号,姓名,性别,出生日期,班级;暂时就只有这些信息,若后续需要,可以相应的进行添加。

该项目主要采用的技术是 Java GUI 设计,这个地方主要用 Java 工具 windowsbuilder 进行布局,(windowsbuilder没有安装或者不会安装的,可以看看我的这篇博客 Eclipse 安装 windowbuilder插件 ),MySql 数据库(Mysql 数据库没有安装的 或者数据库使用软件 Navicat 没有安装的可以看看我的这篇博客 2021 MySql 8.0.26 安装教程(最详细的傻瓜教程) ),以及使用 Java 中的 JDBC 将数据库链接起来。

2. 数据库的建立

由于在项目中没有创建学生数据库的功能,所以学生数据库必须要先建立好,下面给出如何建立好MySQL学生数据库的相关代码 图片

-- 创建数据库CREATE DATABASE niitDEFAULT CHARACTER SET utf8mb4;SHOW DATABASES;-- 使用数据库niitUSE niit;-- 创建表StudentCREATE TABLE Student( ID INT PRIMARY KEY, NAME VARCHAR(4), GENDER CHAR(1), DOB DATE, BATCH INT);-- 插入记录INSERT INTO Student VALUES(1,'独孤求败','男','1988-1-2',1),(2,'周芷若','女','1988-12-3',1),(3,'金毛狮王','男','1978-11-1',1),(4,'蒙挚','男','1989-2-5',2),(5,'夏春','女','1998-4-3',2),(6,'梅长苏','男','1999-12-6',2);-- 查看表中所有记录 语法:select * from 表名SELECT * FROM Student;

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

3. 项目页面

主页面

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

添加学生

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

修改信息

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

删除学生

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

查询信息

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

4. 项目代码 分析

主页面

package studentsmanager;import java.awt.Color;import java.awt.EventQueue;import java.awt.Font;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.border.EmptyBorder;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;public class MainFrame extends JFrame { private JPanel contentPane; /** * Launch the application. */ // 有了main函数才可以单独运行 public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { MainFrame frame = new MainFrame(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ public MainFrame() { // 设置大小不可改变 setResizable(false); // 设置标题 setTitle("学生管理系统"); // 由于这是主页面,所有当主页面关闭的时候,程序就直接退出 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // setBounds(int x,int y,int width,int height); // x 和 y 是窗口打开时的位置 // width 和 height 是窗口打宽度和高度 setBounds(100, 100, 450, 350); // setLocationRelativeTo(c) // 设置窗口相对于 c 的位置,当 c 为空或者 null 时,默认为是相对于屏幕中央 setLocationRelativeTo(null); // 实例化一个 pane contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); setContentPane(contentPane); contentPane.setLayout(null); JLabel lblNewLabel = new JLabel("学生管理系统"); lblNewLabel.setForeground(Color.RED); lblNewLabel.setFont(new Font("宋体", Font.BOLD, 25)); lblNewLabel.setBounds(140, 10, 163, 44); contentPane.add(lblNewLabel); JButton addButton = new JButton("添加学生"); // addActionListener 注册监听器 addButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // 设置新窗口可见 new AddFrame().setVisible(true); } }); addButton.setFont(new Font("宋体", Font.PLAIN, 18)); addButton.setBounds(167, 64, 114, 37); contentPane.add(addButton); JButton changeButton = new JButton("修改信息"); changeButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // 同上 new ChangeFrame().setVisible(true); } }); changeButton.setFont(new Font("宋体", Font.PLAIN, 18)); changeButton.setBounds(167, 121, 114, 37); contentPane.add(changeButton); JButton deleteButton = new JButton("删除学生"); deleteButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // 同上 new DeleteFrame().setVisible(true); } }); deleteButton.setFont(new Font("宋体", Font.PLAIN, 18)); deleteButton.setBounds(167, 180, 114, 37); contentPane.add(deleteButton); JButton queryButton = new JButton("查询信息"); queryButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // 同上 new QueryFrame().setVisible(true); } }); queryButton.setFont(new Font("宋体", Font.PLAIN, 18)); queryButton.setBounds(167, 240, 114, 37); contentPane.add(queryButton); }}

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

添加学生

package studentsmanager;import java.awt.EventQueue;import java.awt.Font;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.sql.SQLException;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.border.EmptyBorder;public class AddFrame extends JFrame { private JPanel contentPane; private JTextField idField; private JTextField nameField; private JTextField genderField; private JTextField dobField; private JTextField batchField; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { AddFrame frame = new AddFrame(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ public AddFrame() { // 和前面类似 setResizable(false); setTitle("添加学生"); // 这个地方,添加学生只是这个程序的一部分,所以当关闭这部分的时候,程序不直接退出,只是关闭该部分程序 setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); setBounds(100, 100, 450, 470); setLocationRelativeTo(null); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); setContentPane(contentPane); contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.Y_AXIS)); JPanel panel = new JPanel(); contentPane.add(panel); panel.setLayout(null); JLabel TitleLabel = new JLabel("请输入新学生的信息:"); TitleLabel.setFont(new Font("宋体", Font.BOLD, 20)); TitleLabel.setBounds(71, 34, 208, 45); panel.add(TitleLabel); JLabel idLabel = new JLabel("学号:"); idLabel.setFont(new Font("宋体", Font.PLAIN, 16)); idLabel.setBounds(71, 105, 50, 30); panel.add(idLabel); idField = new JTextField(); idField.setBounds(143, 99, 240, 45); panel.add(idField); idField.setColumns(10); JLabel nameLabel = new JLabel("姓名:"); nameLabel.setFont(new Font("宋体", Font.PLAIN, 16)); nameLabel.setBounds(71, 160, 50, 30); panel.add(nameLabel); nameField = new JTextField(); nameField.setColumns(10); nameField.setBounds(143, 154, 240, 45); panel.add(nameField); JLabel genderLabel = new JLabel("性别:"); genderLabel.setFont(new Font("宋体", Font.PLAIN, 16)); genderLabel.setBounds(71, 215, 50, 30); panel.add(genderLabel); genderField = new JTextField(); genderField.setColumns(10); genderField.setBounds(143, 209, 240, 45); panel.add(genderField); JLabel dobLabel = new JLabel("出生日期:"); dobLabel.setFont(new Font("宋体", Font.PLAIN, 16)); dobLabel.setBounds(41, 270, 80, 30); panel.add(dobLabel); dobField = new JTextField(); dobField.setColumns(10); dobField.setBounds(143, 264, 240, 45); panel.add(dobField); JLabel batchLabel = new JLabel("班级:"); batchLabel.setFont(new Font("宋体", Font.PLAIN, 16)); batchLabel.setBounds(71, 325, 50, 30); panel.add(batchLabel); batchField = new JTextField(); batchField.setColumns(10); batchField.setBounds(143, 319, 240, 45); panel.add(batchField); JButton addButton = new JButton("添加"); // 添加鼠标监听事件 addButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // 先取出数据 // getText() 返回字符串类型的 // Integer.parseInt 数据类型转换 int id = Integer.parseInt(idField.getText()); String nameString = nameField.getText(); String genderString = genderField.getText(); String dobfieldString = dobField.getText(); int batch = Integer.parseInt(batchField.getText()); // 输出一下学生的信息,方便修改 System.out.println(id "t" nameString "t" genderString "t" dobfieldString "t" batch); // SQLHelp 是自己写的一个工具类 SQLHelp sqlHelp = new SQLHelp(); try { // 调用添加学生信息的方法 sqlHelp.addStudent(id, nameString, genderString, dobfieldString, batch); // 弹出对话框,提示用户添加成功 JOptionPane.showMessageDialog(AddFrame.this, "添加成功!"); } catch (SQLException e1) { // 这里捕获一下异常,因为学生的学号是唯一的,所以当学号已经存在的时候,提示用户,该学生信息已存在 // 异常代码为 23000 if(e1.getSQLState().equals("23000")) { JOptionPane.showMessageDialog(AddFrame.this, "添加失败!该学生已存在"); } e1.printStackTrace(); } } }); addButton.setFont(new Font("宋体", Font.PLAIN, 18)); addButton.setBounds(182, 389, 97, 33); panel.add(addButton); }}

添加成功:

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

添加失败:

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

修改信息

package studentsmanager;import java.awt.EventQueue;import java.awt.Font;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.border.EmptyBorder;import java.awt.event.ActionListener;import java.sql.SQLException;import java.awt.event.ActionEvent;public class ChangeFrame extends JFrame { private JPanel contentPane; private JTextField idField; private JTextField nameField; private JTextField genderField; private JTextField dobField; private JTextField batchField; private JTextField searchField; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { ChangeFrame frame = new ChangeFrame(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ public ChangeFrame() { setResizable(false); setTitle("修改信息"); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); setBounds(100, 100, 450, 470); setLocationRelativeTo(null); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); setContentPane(contentPane); contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.Y_AXIS)); JPanel panel = new JPanel(); contentPane.add(panel); panel.setLayout(null); JLabel lblNewLabel = new JLabel("请输入要修改的学生的学号:"); lblNewLabel.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel.setBounds(71, 0, 208, 29); panel.add(lblNewLabel); JLabel lblNewLabel_1 = new JLabel("学号:"); lblNewLabel_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1.setBounds(71, 105, 50, 30); panel.add(lblNewLabel_1); idField = new JTextField(); idField.setEditable(false); idField.setBounds(143, 99, 240, 45); panel.add(idField); idField.setColumns(10); JLabel lblNewLabel_1_1 = new JLabel("姓名:"); lblNewLabel_1_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1.setBounds(71, 160, 50, 30); panel.add(lblNewLabel_1_1); nameField = new JTextField(); nameField.setColumns(10); nameField.setBounds(143, 154, 240, 45); panel.add(nameField); JLabel lblNewLabel_1_1_1 = new JLabel("性别:"); lblNewLabel_1_1_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1_1.setBounds(71, 215, 50, 30); panel.add(lblNewLabel_1_1_1); genderField = new JTextField(); genderField.setColumns(10); genderField.setBounds(143, 209, 240, 45); panel.add(genderField); JLabel lblNewLabel_1_1_1_1 = new JLabel("出生日期:"); lblNewLabel_1_1_1_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1_1_1.setBounds(41, 270, 80, 30); panel.add(lblNewLabel_1_1_1_1); dobField = new JTextField(); dobField.setColumns(10); dobField.setBounds(143, 264, 240, 45); panel.add(dobField); JLabel lblNewLabel_1_1_1_2 = new JLabel("班级:"); lblNewLabel_1_1_1_2.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1_1_2.setBounds(71, 325, 50, 30); panel.add(lblNewLabel_1_1_1_2); batchField = new JTextField(); batchField.setColumns(10); batchField.setBounds(143, 319, 240, 45); panel.add(batchField); JButton changeButton = new JButton("修改"); changeButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { int id = Integer.parseInt(searchField.getText()); String nameString = nameField.getText(); String gendeString = genderField.getText(); String dobString = dobField.getText(); int batch = Integer.parseInt(batchField.getText()); SQLHelp sqlHelp = new SQLHelp(); try { sqlHelp.changeStudent(id, nameString, gendeString, dobString, batch); JOptionPane.showMessageDialog(ChangeFrame.this, "修改成功!"); } catch (SQLException e) { JOptionPane.showMessageDialog(ChangeFrame.this, "修改失败!"); e.printStackTrace(); } } }); changeButton.setFont(new Font("宋体", Font.PLAIN, 18)); changeButton.setBounds(182, 389, 97, 33); panel.add(changeButton); searchField = new JTextField(); searchField.setBounds(71, 39, 208, 45); panel.add(searchField); searchField.setColumns(10); JButton searchButton = new JButton("查找"); searchButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e){ int id = Integer.parseInt(searchField.getText()); try { SQLHelp sqlHelp = new SQLHelp(); Student student = sqlHelp.queryStudent(id); if(student != null) { // id 是直接读入的,所以就不需要从数据库中读出了 idField.setText(String.valueOf(id)); nameField.setText(student.getName()); genderField.setText(student.getGender()); dobField.setText(student.getDob()); batchField.setText(String.valueOf(student.getBatch())); } else { JOptionPane.showMessageDialog(ChangeFrame.this, "无此用户"); } } catch (SQLException e1) { e1.printStackTrace(); } } }); searchButton.setFont(new Font("宋体", Font.PLAIN, 18)); searchButton.setBounds(289, 42, 97, 39); panel.add(searchButton); }}

修改前查询到学生信息

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

修改成功

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

修改失败

失败的情况是数据链接出现了问题

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

未查询到学生信息

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

删除学生

package studentsmanager;import java.awt.EventQueue;import java.awt.Font;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.border.EmptyBorder;import java.awt.event.ActionListener;import java.sql.SQLException;import java.awt.event.ActionEvent;public class DeleteFrame extends JFrame { private JPanel contentPane; private JTextField idField; private JTextField nameField; private JTextField genderField; private JTextField dobField; private JTextField batchField; private JTextField searchField; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { DeleteFrame frame = new DeleteFrame(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ public DeleteFrame() { setResizable(false); setTitle("删除学生"); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); setBounds(100, 100, 450, 470); setLocationRelativeTo(null); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); setContentPane(contentPane); contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.Y_AXIS)); JPanel panel = new JPanel(); contentPane.add(panel); panel.setLayout(null); JLabel lblNewLabel = new JLabel("请输入要删除的学生的学号:"); lblNewLabel.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel.setBounds(71, 0, 208, 29); panel.add(lblNewLabel); JLabel lblNewLabel_1 = new JLabel("学号:"); lblNewLabel_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1.setBounds(71, 105, 50, 30); panel.add(lblNewLabel_1); idField = new JTextField(); idField.setEditable(false); idField.setBounds(143, 99, 240, 45); panel.add(idField); idField.setColumns(10); JLabel lblNewLabel_1_1 = new JLabel("姓名:"); lblNewLabel_1_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1.setBounds(71, 160, 50, 30); panel.add(lblNewLabel_1_1); nameField = new JTextField(); nameField.setColumns(10); nameField.setBounds(143, 154, 240, 45); panel.add(nameField); JLabel lblNewLabel_1_1_1 = new JLabel("性别:"); lblNewLabel_1_1_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1_1.setBounds(71, 215, 50, 30); panel.add(lblNewLabel_1_1_1); genderField = new JTextField(); genderField.setColumns(10); genderField.setBounds(143, 209, 240, 45); panel.add(genderField); JLabel lblNewLabel_1_1_1_1 = new JLabel("出生日期:"); lblNewLabel_1_1_1_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1_1_1.setBounds(41, 270, 80, 30); panel.add(lblNewLabel_1_1_1_1); dobField = new JTextField(); dobField.setColumns(10); dobField.setBounds(143, 264, 240, 45); panel.add(dobField); JLabel lblNewLabel_1_1_1_2 = new JLabel("班级:"); lblNewLabel_1_1_1_2.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1_1_2.setBounds(71, 325, 50, 30); panel.add(lblNewLabel_1_1_1_2); batchField = new JTextField(); batchField.setColumns(10); batchField.setBounds(143, 319, 240, 45); panel.add(batchField); JButton deleteButton = new JButton("删除"); deleteButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int id = Integer.parseInt(searchField.getText()); try { SQLHelp sqlHelp = new SQLHelp(); sqlHelp.deletestudent(id); JOptionPane.showMessageDialog(DeleteFrame.this, "删除成功!"); } catch (SQLException e1) { JOptionPane.showMessageDialog(DeleteFrame.this, "删除失败"); e1.printStackTrace(); } } }); deleteButton.setFont(new Font("宋体", Font.PLAIN, 18)); deleteButton.setBounds(182, 389, 97, 33); panel.add(deleteButton); searchField = new JTextField(); searchField.setBounds(71, 39, 208, 45); panel.add(searchField); searchField.setColumns(10); JButton searchButton = new JButton("查找"); searchButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { int id = Integer.parseInt(searchField.getText()); try { SQLHelp sqlHelp = new SQLHelp(); Student student = sqlHelp.queryStudent(id); if(student != null) { idField.setText(String.valueOf(id)); nameField.setText(student.getName()); genderField.setText(student.getGender()); dobField.setText(student.getDob()); batchField.setText(String.valueOf(student.getBatch())); } else { JOptionPane.showMessageDialog(DeleteFrame.this, "无此学生"); } } catch (SQLException e) { e.printStackTrace(); } } }); searchButton.setFont(new Font("宋体", Font.PLAIN, 18)); searchButton.setBounds(289, 42, 97, 39); panel.add(searchButton); }}

删除成功

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

删除失败

删除失败的时候是数据库链接出现了问题

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

查询到学生信息

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

未查询到学生

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

查询信息

package studentsmanager;import java.awt.EventQueue;import java.awt.Font;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.sql.SQLException;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.border.EmptyBorder;public class QueryFrame extends JFrame { private JPanel contentPane; private JTextField idField; private JTextField nameField; private JTextField genderField; private JTextField dobField; private JTextField batchField; private JTextField searchField; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { QueryFrame frame = new QueryFrame(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ public QueryFrame() { setResizable(false); setTitle("查询信息"); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); setBounds(100, 100, 450, 470); setLocationRelativeTo(null); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); setContentPane(contentPane); contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.Y_AXIS)); JPanel panel = new JPanel(); contentPane.add(panel); panel.setLayout(null); JLabel lblNewLabel = new JLabel("请输入要查找的学生的学号:"); lblNewLabel.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel.setBounds(71, 0, 208, 29); panel.add(lblNewLabel); JLabel lblNewLabel_1 = new JLabel("学号:"); lblNewLabel_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1.setBounds(71, 105, 50, 30); panel.add(lblNewLabel_1); idField = new JTextField(); idField.setEditable(false); idField.setBounds(143, 99, 240, 45); panel.add(idField); idField.setColumns(10); JLabel lblNewLabel_1_1 = new JLabel("姓名:"); lblNewLabel_1_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1.setBounds(71, 160, 50, 30); panel.add(lblNewLabel_1_1); nameField = new JTextField(); nameField.setColumns(10); nameField.setBounds(143, 154, 240, 45); panel.add(nameField); JLabel lblNewLabel_1_1_1 = new JLabel("性别:"); lblNewLabel_1_1_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1_1.setBounds(71, 215, 50, 30); panel.add(lblNewLabel_1_1_1); genderField = new JTextField(); genderField.setColumns(10); genderField.setBounds(143, 209, 240, 45); panel.add(genderField); JLabel lblNewLabel_1_1_1_1 = new JLabel("出生日期:"); lblNewLabel_1_1_1_1.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1_1_1.setBounds(41, 270, 80, 30); panel.add(lblNewLabel_1_1_1_1); dobField = new JTextField(); dobField.setColumns(10); dobField.setBounds(143, 264, 240, 45); panel.add(dobField); JLabel lblNewLabel_1_1_1_2 = new JLabel("班级:"); lblNewLabel_1_1_1_2.setFont(new Font("宋体", Font.PLAIN, 16)); lblNewLabel_1_1_1_2.setBounds(71, 325, 50, 30); panel.add(lblNewLabel_1_1_1_2); batchField = new JTextField(); batchField.setColumns(10); batchField.setBounds(143, 319, 240, 45); panel.add(batchField); searchField = new JTextField(); searchField.setBounds(71, 39, 208, 45); panel.add(searchField); searchField.setColumns(10); JButton searchButton = new JButton("查找"); searchButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { // 1.读出要查询的学生输入的id // 因为学生的学号是唯一的,所以我们根据学号查询后,只会有一条数据 // 转化一下数据类型 int id = Integer.parseInt(searchField.getText()); // 2.执行JDBC语句 try { SQLHelp sqlHelp = new SQLHelp(); Student student = sqlHelp.queryStudent(id); // 3.将查询结果填到文本框中 // 前提是学生存在 if(student != null) { idField.setText(String.valueOf(id)); nameField.setText(student.getName()); genderField.setText(student.getGender()); dobField.setText(student.getDob()); batchField.setText(String.valueOf(student.getBatch())); } else { // 此时学生不存在,提示用户,不存在该学生 JOptionPane.showMessageDialog(QueryFrame.this, "无此学生"); } } catch (SQLException e) { e.printStackTrace(); } } }); searchButton.setFont(new Font("宋体", Font.PLAIN, 18)); searchButton.setBounds(289, 42, 97, 39); panel.add(searchButton); }}

Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解(java的学生信息管理系统详解)

SQLHelp 工具类

package studentsmanager;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;public class SQLHelp { public static final String JDBC_DRIVER = "com.mysql.cj.jdbc.Driver"; public static final String DB_URL = "jdbc:mysql://localhost:3306/niit?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC"; public static final String username = "root"; public static final String password = "011216"; private Connection connection = null; private PreparedStatement pStatement = null; private ResultSet rSet = null; // 加载驱动 // 静态初始化块(只执行一次) static { try { Class.forName(JDBC_DRIVER); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } } // 链接数据库 public void connectDB() { try { connection = DriverManager.getConnection(DB_URL,username,password); System.out.println("数据库链接成功"); } catch (SQLException e) { System.out.println("数据库链接失败"); e.printStackTrace(); } } // 关闭资源 public void close() { if(rSet != null) { try { rSet.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } if(pStatement != null) { try { pStatement.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } if(connection != null) { try { connection.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } public void addStudent(int id, String nameString, String genderString, String dobString, int batch) throws SQLException { // try finally 无论是否抛出异常都将执行 finally 中的语句 try { // 先链接到数据库 connectDB(); // sql 语句 // 静态 sql 语句需要进行字符串拼接 // 动态 sql 语句 String addsql = "insert into student values(?, ?, ?, ?, ?)"; pStatement = connection.prepareStatement(addsql); pStatement.setInt(1, id); pStatement.setString(2, nameString); pStatement.setString(3, genderString); pStatement.setString(4, dobString); pStatement.setInt(5, batch); pStatement.executeUpdate(); } finally { close(); } } public void changeStudent(int id, String nameString, String genderString, String dobString, int batch) throws SQLException { try { connectDB(); String changesql = "update student set name = ?, gender = ?, dob = ?, batch = ? where id = ?"; pStatement = connection.prepareStatement(changesql); pStatement.setString(1, nameString); pStatement.setString(2, genderString); pStatement.setString(3, dobString); pStatement.setInt(4, batch); pStatement.setInt(5, id); pStatement.executeUpdate(); } finally { close(); } } public void deletestudent(int id) throws SQLException { try { connectDB(); String deleteString = "select * from student where id = ?"; pStatement = connection.prepareStatement(deleteString); pStatement.setInt(1, id); pStatement.execute(); } finally { close(); } } public Student queryStudent(int id) throws SQLException { try { connectDB(); String querysql = "select * from student where id = ?"; pStatement = connection.prepareStatement(querysql); pStatement.setInt(1, id); // 三种方法执行 // execute() 都可以使用,返回true或false // executeQuery() 专门用于查询,返回结果集 // executeUpdate() 专门用于删除、更新 rSet = pStatement.executeQuery(); if(rSet.next()) { String nameString = rSet.getString(2); String genderString = rSet.getString(3); String dobString = rSet.getString(4); int batchString = rSet.getInt(5); // 查询到学生信息返回结果集 return new Student(nameString, genderString, dobString, batchString); } else { // 没有查询到学生信息,返回null return null; } } finally { close(); } }}

Student 工具类

package studentsmanager;public class Student { private String name; private String gender; private String dob; private int batch; public Student(String name, String gender, String dob, int batch) { this.name = name; this.gender = gender; this.dob = dob; this.batch = batch; } public String getName() { return name; } public String getGender() { return gender; } public String getDob() { return dob; } public int getBatch() { return batch; } }

5. 项目总结

这算一个比较完整的项目了,既有 GUI 又有 MySQL 数据库的已经 Java 的 JDBC ,虽然已经有了 GUI 界面,但很明显,没有进行任何美化,就只是简单的一个界面,勉勉强强可以看的过去,使用 JDBC 链接数据库的时候,没有实现可以直接在程序创建数据库,只能从数据库方创建数据库,这是一个缺点,同时使用 JDBC 链接数据库的时候,所使用的代码依旧是 MySQL 数据库的代码,(我 MySQL 学的不好,增删改查啥的数据库代码都还记不清楚 哭了…)还有就是当程序在进行修改和删除的时候,修改失败和删除失败的时候,都是因为数据链接失败了才进行弹窗,不知道怎么改成无法修改或者无法删除的时候提示,(又哭了…)

欢迎个位大佬指出错误,同时也欢迎各位小白借鉴,有问题的话,评论或者私聊都是可以的,看了就会回复!

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原文地址:https://blog.csdn.net/qq_52354698/article/details/121582956

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