用java编写学生信息管理系统，只需有添加，删除，修改，查询，输出等功能即可！无需写入数据库！
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添加的信息，输出信息按学号有序排列的。希望添加时可以直接用有序插入！！
这次回答直接发到我邮箱772589582@qq.com
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.util.*;
class Student implements java.io.Serializable
String number,name,specialty,grade,borth,sex;
public Student();
public void setNumber(String number) this.number=number;
public String getNumber() return number;
public void setName(String name) this.name=name;
public String getName() return name;
public void setSex(String sex) this.sex=sex;
public String getSex() return sex;
public void setSpecialty(String specialty) this.specialty=specialty;
public String getSpecialty() return specialty;
public void setGrade(String grade) this.grade=grade;
public String getGrade() return grade;
public void setBorth(String borth) this.borth=borth;
public String getBorth() return borth;
public class StudentManager extends JFrame
JLabel lb=new JLabel("录入请先输入记录，查询、删除请先输入学号，修改是对查询" +
"内容改后的保存！");
static JTextField Jnumber,Jname,Jspecialty,Jgrade,Jborth;
static JRadioButton boy,girl;
static ButtonGroup group=null;
static JButton Login,select,delete,update,show;
static JPanel p1,p2,p3,p4,p5,p6,pv,ph;
static Student student=null;
static Hashtable Shashtable=null;
static File file=null;
static FileInputStream inOne=null;
static ObjectInputStream inTwo=null;
static FileOutputStream outOne=null;
static ObjectOutputStream outTwo=null;
public StudentManager()
super("学生基本信息管理系统");
Jnumber=new JTextField(10);
Jname =new JTextField(10);
Jspecialty=new JTextField(10);
Jgrade=new JTextField(10);
Jborth=new JTextField(10);
group=new ButtonGroup();
boy=new JRadioButton("男",true);
girl=new JRadioButton("女",false);
group.add(boy);
group.add(girl);
Login=new JButton("录入");
select=new JButton("查询");
delete=new JButton("删除");
update=new JButton("修改");
show=new JButton("显示");
Login.addActionListener(new InputAct());
select.addActionListener(new InquestAct());
update.addActionListener(new ModifyAct());
delete.addActionListener(new DeleteAct());
show.addActionListener(new ShowAct());
update.setEnabled(false);
p1=new JPanel();
p1.add(new JLabel("学号:",JLabel.CENTER));
p1.add(Jnumber);
p2=new JPanel();
p2.add(new JLabel("姓名:",JLabel.CENTER));
p2.add(Jname);
p3=new JPanel();
p3.add(new JLabel("性别:",JLabel.CENTER));
p3.add(boy);
p3.add(girl);
p4=new JPanel();
p4.add(new JLabel("专业:",JLabel.CENTER));
p4.add(Jspecialty);
p5=new JPanel();
p5.add(new JLabel("年级:",JLabel.CENTER));
p5.add(Jgrade);
p6=new JPanel();
p6.add(new JLabel("出生:",JLabel.CENTER));
p6.add(Jborth);
pv=new JPanel();
pv.setLayout(new GridLayout(6,1));
pv.add(p1);
pv.add(p2);
pv.add(p3);
pv.add(p4);
pv.add(p5);
pv.add(p6);
ph=new JPanel();
ph.add(Login);
ph.add(select);
ph.add(update);
ph.add(delete);
ph.add(show);
file=new File("学生信息.txt");
Shashtable=new Hashtable();
if(!file.exists())
try
FileOutputStream out=new FileOutputStream(file);
ObjectOutputStream objectOut=new ObjectOutputStream(out);
objectOut.writeObject(Shashtable);
objectOut.close();
out.close();
catch(IOException e)
Container con=getContentPane();
con.setLayout(new BorderLayout());
con.add(lb, BorderLayout.NORTH);
con.add(pv, BorderLayout.CENTER);
con.add(ph, BorderLayout.SOUTH);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setBounds(100,100,600,300);
setVisible(true);
public static void main(String[] args) new StudentManager();
class InputAct implements ActionListener
public void actionPerformed(ActionEvent e)
update.setEnabled(false);
String number="";
number=Jnumber.getText();
if(number.length()>0)
try
inOne=new FileInputStream(file);
inTwo=new ObjectInputStream(inOne);
Shashtable=(Hashtable)inTwo.readObject();
inOne.close();
inTwo.close();
catch(Exception ee)System.out.println("创建散列表出现问题！");
if(Shashtable.containsKey(number))
String warning="该生信息已存在，请到修改页面修改！";
JOptionPane.showMessageDialog(null,warning,"警告",
JOptionPane.WARNING_MESSAGE);
//end if1
else
String m="该生信息将被录入！";
int ok=JOptionPane.showConfirmDialog(null,m,"确认",
JOptionPane.YES_NO_OPTION,JOptionPane.INFORMATION_MESSAGE);
if(ok==JOptionPane.YES_OPTION)
String name=Jname.getText();
String specialty=Jspecialty.getText();
String grade=Jgrade.getText();
String borth=Jborth.getText();
String sex=null;
if(boy.isSelected())sex=boy.getText();
elsesex=girl.getText();
student=new Student();
student.setNumber(number);
student.setName(name);
student.setSpecialty(specialty);
student.setGrade(grade);
student.setBorth(borth);
student.setSex(sex);
try
outOne=new FileOutputStream(file);
outTwo=new ObjectOutputStream(outOne);
Shashtable.put(number,student);
outTwo.writeObject(Shashtable);
outTwo.close();
outOne.close();
catch(Exception ee)System.out.println("输出散列表出现问题！");
Jnumber.setText(null);
Jname.setText(null);
Jspecialty.setText(null);
Jgrade.setText(null);
Jborth.setText(null);
//end else1
//end if0
else
String warning="必须输入学号！";
JOptionPane.showMessageDialog(null,warning,
"警告",JOptionPane.WARNING_MESSAGE);
//end else0
//end actionPerformed
//end class
class InquestAct implements ActionListener
public void actionPerformed(ActionEvent e)
String number="";
number=Jnumber.getText();
if(number.length()>0)
try
inOne=new FileInputStream(file);
inTwo=new ObjectInputStream(inOne);
Shashtable=(Hashtable)inTwo.readObject();
inOne.close();
inTwo.close();
catch(Exception ee)System.out.println("散列表有问题！");
if(Shashtable.containsKey(number))
update.setEnabled(true);
Student stu=(Student)Shashtable.get(number);
Jname.setText(stu.getName());
Jspecialty.setText(stu.getSpecialty());
Jgrade.setText(stu.getGrade());
Jborth.setText(stu.getBorth());
if(stu.getSex().equals("男"))boy.setSelected(true);
elsegirl.setSelected(true);
else
update.setEnabled(false);
String warning="该学号不存在！";
JOptionPane.showMessageDialog(null,warning,
"警告",JOptionPane.WARNING_MESSAGE);
else
update.setEnabled(false);
String warning="必须输入学号！";
JOptionPane.showMessageDialog(null,warning,
"警告",JOptionPane.WARNING_MESSAGE);
class ModifyAct implements ActionListener
public void actionPerformed(ActionEvent e)
String number=Jnumber.getText();
String name=Jname.getText();
String specialty=Jspecialty.getText();
String grade=Jgrade.getText();
String borth=Jborth.getText();
String sex=null;
if(boy.isSelected())sex=boy.getText();
elsesex=girl.getText();
Student 学生=new Student();
学生.setNumber(number);
学生.setName(name);
学生.setSpecialty(specialty);
学生.setGrade(grade);
学生.setBorth(borth);
学生.setSex(sex);
try
outOne=new FileOutputStream(file);
outTwo=new ObjectOutputStream(outOne);
Shashtable.put(number, 学生);
outTwo.writeObject(Shashtable);
outTwo.close();
outOne.close();
Jnumber.setText(null);
Jname.setText(null);
Jspecialty.setText(null);
Jgrade.setText(null);
Jborth.setText(null);
catch(Exception ee)
System.out.println("录入修改出现异常!");
update.setEnabled(false);
class DeleteAct implements ActionListener
public void actionPerformed(ActionEvent e)
update.setEnabled(false);
String number=Jnumber.getText();
if(number.length()>0)
try
inOne=new FileInputStream(file);
inTwo=new ObjectInputStream(inOne);
Shashtable=(Hashtable)inTwo.readObject();
inOne.close();
inTwo.close();
catch(Exception ee)
if(Shashtable.containsKey(number))
Student stu=(Student)Shashtable.get(number);
Jname.setText(stu.getName());
Jspecialty.setText(stu.getSpecialty());
Jgrade.setText(stu.getGrade());
Jborth.setText(stu.getBorth());
if(stu.getSex().equals("男"))boy.setSelected(true);
elsegirl.setSelected(true);
String m="确定要删除该学生的记录吗？";
int ok=JOptionPane.showConfirmDialog(null,m,"确认",
JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE);
if(ok==JOptionPane.YES_OPTION)
Shashtable.remove(number);
try
outOne=new FileOutputStream(file);
outTwo=new ObjectOutputStream(outOne);
outTwo.writeObject(Shashtable);
outTwo.close();
outOne.close();
Jnumber.setText(null);
Jname.setText(null);
Jspecialty.setText(null);
Jgrade.setText(null);
Jborth.setText(null);
catch(Exception ee)System.out.println(ee);
else if(ok==JOptionPane.NO_OPTION)
Jnumber.setText(null);
Jname.setText(null);
Jspecialty.setText(null);
Jgrade.setText(null);
Jborth.setText(null);
else
String warning="该学号不存在！";
JOptionPane.showMessageDialog(null,warning,
"警告",JOptionPane.WARNING_MESSAGE);
else
String warning="必须输入学号！";
JOptionPane.showMessageDialog(null,warning,
"警告",JOptionPane.WARNING_MESSAGE);
class ShowAct implements ActionListener
public void actionPerformed(ActionEvent e)
new StudentShow(file);
class StudentShow extends JDialog
Hashtable 学生散列表= null;
JTextArea 显示=null;
FileInputStream inOne=null;
ObjectInputStream inTwo=null;
File file=null;
public StudentShow(File file)
super(new JFrame(),"显示对话框");
this.file=file;
显示=new JTextArea(16,30);
try
inOne=new FileInputStream(file);
inTwo=new ObjectInputStream(inOne);
学生散列表=(Hashtable)inTwo.readObject();
inOne.close();
inTwo.close();
catch(Exception ee)
if(学生散列表.isEmpty())显示.append("目前还没有学生的信息记录！\n");
else
显示.setText("学号 姓名 性别 专业 年级 出生\n");
for(Enumeration enm=学生散列表.elements();enm.hasMoreElements();)
Student stu=(Student)enm.nextElement();
String sex="";
if(stu.getSex().equals("男"))sex="男";
else sex="女";
String str=stu.getNumber()+","+stu.getName()+","+sex+","
+stu.getSpecialty()+","+stu.getGrade()+","+stu.getBorth()+"\n";
显示.append(str);
JScrollPane scroll=new JScrollPane(显示);
Container con=getContentPane();
con.add("Center",scroll);
con.validate();
setVisible(true);
setBounds(200,200,400,300);
addWindowListener(new WindowAdapter()
public void windowClosing(WindowEvent e)setVisible(false);
);
参考技术A 可以通过Baidu Hi提示我
有时间可能完成你所面临的任务
相关的要求也可能提示我
ES:\\5F97D3CBAC6B9B2690D1D8E74380C342
交易提醒:预付定金是诈骗追问
你理解错了，是添加时就是按有序添加进入程序中，你编写过有序链表吗？就是跟有序插入的！
Java 项目 学生信息管理系统 超详细 超完整 保姆级讲解（主页面 + 添加学生信息 + 删除学生信息 +...
Java 学生信息管理系统
关注博主不迷路，博主带你码代码！
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 niit DEFAULT CHARACTER SET utf8mb4; SHOW DATABASES; -- 使用数据库niit USE niit; -- 创建表Student CREATE 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;
3. 项目页面
主页面
添加学生
修改信息
删除学生
查询信息
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);
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：
添加失败：
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
修改成功
修改失败
失败的情况是数据链接出现了问题
未查询到学生信息
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
删除失败
删除失败的时候是数据库链接出现了问题
查询到学生信息
未查询到学生
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);
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！
以上是关于用java编写学生信息管理系统，只需有添加，删除，修改，查询，输出等功能即可！无需写入数据库！的主要内容，如果未能解决你的问题，请参考以下文章
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