Java课程设计
前言
来csdn也有两年了,在这期间学了很多的知识,也跟着许多的大神做了几个小项目。但自己也在想什么时候能够有个自己的项目,之前在学校做过一个基于集合存储数据的学生信息管理系统,现在想着改进一下,于是趁着暑假做了一个小项目吧(基于mysql+jdbc+java swing的学生成绩信息管理系统)。一来是巩固自己的学习成果,二来是记录自己的学习历程,期待后面能做出更多的项目吧。
设计需求和思路
设计需求
1.利用jdbc将java程序与mysql建立连接
2.利用java swing将学生信息和成绩信息显现出来
3.通过使用sql指令来实现对学生信息和成绩信息的crud(增查改删)操作
设计思路
1.利用Navicat创建两个数据表(stu和classes),同时两个数据表用外键约束连接(
CONSTRAINT `fk_classes_stu` FOREIGN KEY (`class_id`) REFERENCES `stu` (`stu_num`) ON DELETE CASCADE
)
2.使用sql指令对数据表中数据进行增删改查,并通过java swing显示
3.查询所有学生信息,利用连接查询将两个数据表的信息一并显示
详细操作
1.设计主界面(登录注册界面)
账号和密码通过HashMap来存储,账号为键密码为值,利用其基本方法来添加账号密码(注册),以及登录。
package view;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashMap;
import java.util.Map;
public class MainView extends JFrame {
private Map<String,String> userhashmap=new HashMap<>();
JPanel p1=new JPanel();
JPanel p2=new JPanel();
JPanel p3=new JPanel();
JPanel p4=new JPanel();
JLabel welcome=new JLabel("欢迎来到学生信息管理系统");
JLabel username=new JLabel("账号:");
JLabel password=new JLabel("密码:");
JTextField usernametext=new JTextField(10);
JPasswordField passwordField=new JPasswordField(10);
JButton confirm=new JButton("确认");
JButton exit=new JButton("退出");
JButton register=new JButton("注册");
public MainView() {
this.setTitle("学生信息管理系统");
this.setSize(800, 500);
this.setLayout(new GridLayout(4, 1,10,10));
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
p4.add(welcome);
p1.add(username);
p1.add(usernametext);
p2.add(password);
p2.add(passwordField);
p3.add(confirm);
p3.add(register);
p3.add(exit);
this.add(p4);
this.add(p1);
this.add(p2);
this.add(p3);
register.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(e.getSource()==register){
if(userhashmap.containsKey(usernametext.getText())){
JOptionPane.showMessageDialog(null,"注册失败,您的账号已存在","警告",JOptionPane.WARNING_MESSAGE);
return;
}
userhashmap.put(usernametext.getText(),passwordField.getText());
JOptionPane.showMessageDialog(null,"注册成功","通知",JOptionPane.INFORMATION_MESSAGE);
}
}
});
confirm.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == confirm) {
if (userhashmap.containsKey(usernametext.getText())) {
if (userhashmap.get(usernametext.getText()).equals(passwordField.getText())) {
JOptionPane.showMessageDialog(null,"登陆成功","通知",JOptionPane.INFORMATION_MESSAGE);
dispose();
ManagerView mv=new ManagerView();
mv.setVisible(true);
} else {
JOptionPane.showMessageDialog(null,"密码错误","警告",JOptionPane.WARNING_MESSAGE);
}
}
else{
JOptionPane.showMessageDialog(null,"该用户不存在","警告",JOptionPane.WARNING_MESSAGE);
}
}
}
});
exit.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
}
public static void main(String[] args) {
MainView m=new MainView();
m.setVisible(true);
}
}
2.设计学生信息管理界面和成绩信息管理界面
使用GridBagLayout布局设置左边为学生信息管理的按钮,右边为成绩信息管理的按钮
package view;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class ManagerView extends JFrame{
JButton insert=new JButton("添加学生信息");
JButton delete=new JButton("删除学生");
JButton update=new JButton("学生信息修改");
JButton query=new JButton("查询学生信息");
JButton queryall=new JButton("查询所有学生信息");
JButton insertclass=new JButton("添加成绩信息");
JButton deleteclass=new JButton("删除成绩信息");
JButton updateclass=new JButton("修改成绩信息");
JLabel labelstu=new JLabel("学生管理系统");//设置“学生管理系统”标签
JLabel labelclass=new JLabel("成绩管理系统");//设置“成绩管理系统”标签
public ManagerView(){
this.setTitle("学生成绩管理");
this.setSize(1200,500);
this.setLayout(new GridBagLayout());
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//设置每个按钮长,高为140,120
Dimension dimension=new Dimension(140,30);//通过setPreferredSize()方法来设置按钮和标签大小,但要传入Dimension对象
insert.setPreferredSize(dimension);
delete.setPreferredSize(dimension);
update.setPreferredSize(dimension);
query.setPreferredSize(dimension);
queryall.setPreferredSize(dimension);
insertclass.setPreferredSize(dimension);
deleteclass.setPreferredSize(dimension);
updateclass.setPreferredSize(dimension);
labelstu.setPreferredSize(dimension);
labelclass.setPreferredSize(dimension);
GridBagConstraints constraintsleft=new GridBagConstraints();
constraintsleft.gridx = 0; // 列为0
constraintsleft.gridy = GridBagConstraints.RELATIVE; // 按钮的行相对于前一个按钮的行
constraintsleft.anchor = GridBagConstraints.CENTER; // 设置水平方向上的位置居中
constraintsleft.fill = GridBagConstraints.HORIZONTAL; // 填充水平方向
/*constraintsleft.weightx = 0.5; // 水平方向上的权重为0.5*/
constraintsleft.insets = new Insets(5, 5, 5, 200); // 设置按钮的内边距
constraintsleft.ipadx = 10;
this.add(labelstu,constraintsleft);
this.add(insert,constraintsleft);
this.add(delete,constraintsleft);
this.add(update,constraintsleft);
this.add(query,constraintsleft);
this.add(queryall,constraintsleft);
GridBagConstraints constraintsright=new GridBagConstraints();
constraintsright.gridx=1;
constraintsleft.gridy = GridBagConstraints.RELATIVE; // 按钮的行相对于前一个按钮的行
constraintsleft.anchor = GridBagConstraints.CENTER; // 设置水平方向上的位置居中
constraintsleft.fill = GridBagConstraints.HORIZONTAL; // 填充水平方向
/*constraintsleft.weightx = 0.5; // 水平方向上的权重为0.5*/
constraintsleft.insets = new Insets(5, 200, 5, 5); // 设置按钮的内边距
constraintsleft.ipadx = 10;
this.add(labelclass,constraintsright);
this.add(insertclass,constraintsright);
this.add(deleteclass,constraintsright);
this.add(updateclass,constraintsright);
insert.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
InsertStuView insertStuView=new InsertStuView();
insertStuView.setVisible(true);
}
});
delete.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
DeleteStuView deleteStuView=new DeleteStuView();
deleteStuView.setVisible(true);
}
});
update.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
UpdateStuview updateStuview=new UpdateStuview();
updateStuview.setVisible(true);
}
});
query.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
QueryStuView queryStuView=new QueryStuView();
queryStuView.setVisible(true);
}
});
insertclass.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
InsertClassView insertClassView=new InsertClassView();
insertClassView.setVisible(true);
}
});
deleteclass.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
DeleteClassView deleteClassView=new DeleteClassView();
deleteClassView.setVisible(true);
}
});
updateclass.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
UpdateClassView updateClassView =new UpdateClassView();
updateClassView.setVisible(true);
}
});
/* p1.add(insert);
p2.add(delete);
p3.add(query);
p4.add(update);
p5.add(orderby);*/
queryall.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
QueryAllView queryAllView=new QueryAllView();
queryAllView.setVisible(true);
}
});
}
}
3.设计学生信息操作
添加学生信息
package view;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import service.StuManage;
public class InsertStuView extends JFrame {
JLabel labelname=new JLabel("请输入您的姓名");
JLabel labelgender=new JLabel("请输入您的性别");
JLabel labelid=new JLabel("请输入您的学号");
JTextField textname=new JTextField(15);
JTextField textgender=new JTextField(15);
JTextField textid=new JTextField(15);
JButton confirm=new JButton("确定");
JButton cancel=new JButton("取消");
JPanel p1=new JPanel();
JPanel p2=new JPanel();
JPanel p3=new JPanel();
JPanel p4=new JPanel();
public InsertStuView(){
this.setSize(500,300);
this.setTitle("请添加学生信息");
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setLayout(new GridLayout(4,1,10,10));
p1.add(labelname);
p1.add(textname);
p2.add(labelgender);
p2.add(textgender);
p3.add(labelid);
p3.add(textid);
p4.add(confirm);
p4.add(cancel);
this.add(p1);
this.add(p2);
this.add(p3);
this.add(p4);
confirm.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
try {
StuManage.insertStudata(textname.getText(),textgender.getText(),textid.getText());
} catch (Exception ex) {
JOptionPane.showMessageDialog(null,"添加失败","警告",JOptionPane.WARNING_MESSAGE);
}
dispose();
}
});
cancel.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
dispose();
}
});
}
}
通过学号删除学生,因为学号不会重复
package view;
import service.StuManage;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class DeleteStuView extends JFrame {
JLabel labelid=new JLabel("请输入您想删除学生的学号");
JTextField textField=new JTextField(15);
JPanel p1=new JPanel();
JPanel p2=new JPanel();
JButton confirm=new JButton("确定");
JButton cancel=new JButton("取消");
public DeleteStuView(){
this.setSize(500,300);
this.setLayout(new GridLayout(2,1,0,0));
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setTitle("删除学生");
p1.add(labelid);
p1.add(textField);
p2.add(confirm);
p2.add(cancel);
p1.setBorder(BorderFactory.createEmptyBorder(70,0,0,0));
this.add(p1);
this.add(p2);
confirm.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
try{
StuManage.deleteStudata(textField.getText());
}catch(Exception ex){
JOptionPane.showMessageDialog(null,"删除失败","警告",JOptionPane.WARNING_MESSAGE);
}
dispose();
}
});
cancel.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
dispose();
}
});
}
}
学生信息修改
package view;
import service.StuManage;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class UpdateStuview extends JFrame{
JLabel labeloldid=new JLabel("请输入您要修改学生的学号");
JLabel labelname=new JLabel("请输入您要修改后的姓名");
JLabel labelgender=new JLabel("请输入您要修改后的性别");
JLabel labelid=new JLabel("请输入您要修改后的学号");
JTextField textFieldoldid=new JTextField(15);
JTextField textname=new JTextField(15);
JTextField textgender=new JTextField(15);
JTextField textid=new JTextField(15);
JButton confirm=new JButton("确定");
JButton cancel=new JButton("取消");
JPanel p1=new JPanel();
JPanel p2=new JPanel();
JPanel p3=new JPanel();
JPanel p4=new JPanel();
JPanel p5=new JPanel();
public UpdateStuview(){
this.setSize(500,300);
this.setTitle("请修改学生信息");
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setLayout(new GridLayout(5,1,10,10));
p1.add(labeloldid);
p1.add(textFieldoldid);
p2.add(labelname);
p2.add(textname);
p3.add(labelgender);
p3.add(textgender);
p4.add(labelid);
p4.add(textid);
p5.add(confirm);
p5.add(cancel);
this.add(p1);
this.add(p2);
this.add(p3);
this.add(p4);
this.add(p5);
confirm.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
try {
StuManage.updateStudata(textname.getText(),textgender.getText(),textid.getText(),textFieldoldid.getText());
} catch (Exception ex) {
JOptionPane.showMessageDialog(null,"修改失败","警告",JOptionPane.WARNING_MESSAGE);
}
dispose();
}
});
cancel.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
dispose();
}
});
}
}
查询学生信息
package view;
import service.ClassManage;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class QueryStuView extends JFrame {
JLabel id=new JLabel("请输入学生的id");
JTextField textid=new JTextField(15);
JButton confirm=new JButton("确定");
JButton cancel=new JButton("取消");
JLabel labelstu=new JLabel("学生信息表");
JLabel labelscore=new JLabel("成绩信息表");
JPanel p1=new JPanel();
JPanel p2=new JPanel();
JPanel p3=new JPanel();
JPanel p4=new JPanel();
String[] stucolumnname={"姓名","性别","学号"};
String[] scorecolumnname={"学科","分数","教师"};
public QueryStuView(){
this.setLayout(new GridLayout(4,4,10,10));
this.setTitle("学生信息查询");
this.setSize(1000,700);
DefaultTableModel stumodel=new DefaultTableModel();
DefaultTableModel scoremodel=new DefaultTableModel();
stumodel.setColumnIdentifiers(stucolumnname);
scoremodel.setColumnIdentifiers(scorecolumnname);
JTable stutable = new JTable(stumodel);
JTable scoretable=new JTable(scoremodel);
JScrollPane scrollstu=new JScrollPane(stutable);
JScrollPane scrollscore=new JScrollPane(scoretable);
p1.setBorder(BorderFactory.createEmptyBorder(70,0,0,0));
p1.add(id);
p1.add(textid);
p2.add(confirm);
p2.add(cancel);
p3.add(labelstu);
p3.add(scrollstu);
p4.add(labelscore);
p4.add(scrollscore);
this.add(p1);
this.add(p2);
this.add(p3);
this.add(p4);
confirm.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
try{
stumodel.setRowCount(0);
scoremodel.setRowCount(0);
ClassManage.querystu(textid.getText(),stumodel,scoremodel);
}catch(Exception ex){
JOptionPane.showMessageDialog(null,"查找失败","警告",JOptionPane.WARNING_MESSAGE);
}
}
});
cancel.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
dispose();
}
});
}
}
查询所有学生信息
package view;
import service.ClassManage;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
public class QueryAllView extends JFrame{
JLabel text=new JLabel("学生信息查询");
DefaultTableModel model=new DefaultTableModel();
JTable queryall=new JTable(model);
JScrollPane jScrollPane=new JScrollPane(queryall);
JPanel p1=new JPanel();
JPanel p2=new JPanel();
public QueryAllView(){
this.setTitle("学生成绩查询");
this.setSize(1000,700);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
String[] columnname={"姓名","性别","学号","科目","分数"};
model.setColumnIdentifiers(columnname);
p1.add(text);
p2.add(jScrollPane);
this.add(p1);
this.add(p2);
try{
ClassManage.queryall(model);
}catch(Exception ex){
JOptionPane.showMessageDialog(null,"查询失败","警告",JOptionPane.WARNING_MESSAGE);
}
}
}
功能效果展示
1.项目结构
2.stu数据表和classes数据表初始数据
3.登录和注册功能演示
4.添加学生信息
5. 删除学生
6.学生信息修改
7.查询学生信息
8.查询所有学生信息
9.添加学生成绩
10.删除学生成绩信息(学号为20210004的学生的Java成绩信息全被删除)
11.修改学生成绩信息(修改学号为20210004的学生的C++成绩,修改为100)
mysql数据表结构
1.学生数据表(stu)结构
前言:先创建名为pro_stumanage的数据库,再使用改数据,其次再创建两个数据表
2.成绩数据表(classes)结构
tips:通过外键约束将classes的class_id和stu的stu_num关联,并且添加了删除的级联操作,这样删除学生,其成绩也会删除
文章来源:https://www.toymoban.com/news/detail-762431.html
总结
花了三四天的时间做了个小项目,基本上我想要做的功能已基本实现了,能够基本实现对学生信息的增删改查操作。同时,我学到了很多之前没学到的知识,也对近期学的知识进行了巩固和复习。不过我是学完之后再做,所以可能有些bug和小问题,也欢迎各位来提问指正问题,也期待自己能够作出更多更优质的项目。如果想要源码可以直接私信或者通过百度网盘下载源码。文章来源地址https://www.toymoban.com/news/detail-762431.html
百度网盘下载链接:
链接:https://pan.baidu.com/s/1LKKdetbWrXk0K3Ynz-E6Sg
提取码:0718
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