Eclipse+Java+Swing实现学生成绩管理系统的实例代码

一、系统介绍

本系统实现了用户登录，实现了对学生成绩的增删改查，实现了用户修改密码功能，采用MD5加密算法，数据库使用Mysql8.0.13，界面良好。

二、系统展示

1.登录页

2.主页面

3.查询学生成绩

4.修改学生成绩

5.添加学生成绩

6.修改系统密码

三、系统实现 Student.java

package com.sjsq.model;

import java.util.ArrayList;
import java.util.List;

/**
* 学生实体类
* @author shuijianshiqing
*
*/

public class Student {

// 学号
private String sId;
// 姓名
private String sName;
// 性别
private String sSex;
// 学院
private String sCollege;
private String sC;
private String sMath;
private String sEnglish;
private String sChinese;
private String sJava;

public Student() {
super();
}

public Student(String sId, String sName, String sSex, String sCollege, String sC, String sMath,
String sEnglish, String sChinese, String sJava) {
super();
this.sId = sId;
this.sName = sName;
this.sSex = sSex;
this.sCollege = sCollege;
this.sC = sC;
this.sMath = sMath;
this.sEnglish = sEnglish;
this.sChinese = sChinese;
this.sJava = sJava;
}

public static List<Student> students=new ArrayList<Student>();

public String getsId() {
return sId;
}

public void setsId(String sId) {
this.sId = sId;
}

public String getsName() {
return sName;
}

public void setsName(String sName) {
this.sName = sName;
}

public String getsSex() {
return sSex;
}

public void setsSex(String sSex) {
this.sSex = sSex;
}

public String getsCollege() {
return sCollege;
}

public void setsCollege(String sCollege) {
this.sCollege = sCollege;
}

public String getsC() {
return sC;
}

public void setsC(String sC) {
this.sC = sC;
}

public String getsMath() {
return sMath;
}

public void setsMath(String sMath) {
this.sMath = sMath;
}

public String getsEnglish() {
return sEnglish;
}

public void setsEnglish(String sEnglish) {
this.sEnglish = sEnglish;
}

public String getsChinese() {
return sChinese;
}

public void setsChinese(String sChinese) {
this.sChinese = sChinese;
}

public String getsJava() {
return sJava;
}

public void setsJava(String sJava) {
this.sJava = sJava;
}

@Override
public String toString() {
return "Student [sId=" + sId + ", sName=" + sName + ", sSex=" + sSex + ", sCollege=" + sCollege + ", sC="
+ sC + ", sMath=" + sMath + ", sEnglish=" + sEnglish + ", sChinese=" + sChinese + ", sJava="
+ sJava + "]";
}

}

StudentDao.java

package com.sjsq.dao;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import com.sjsq.model.Student;
import com.sjsq.util.DBUtil;

public class StudentDao {
public static int progress;

// private final String FILE_PATH="d:\\student.xls";

public static StudentDao getInstance() {
StudentDao studentDao;
return studentDao = new StudentDao();
}

// 查询所有学生的信息
public ResultSet queryAll() {
ResultSet rs = null;
String sql = "select * from Student";
System.out.println("------查询所有学生信息------");
System.out.println("sql语句:" + sql);
DBUtil db = new DBUtil();
try {
rs = db.executeQuery(sql);
} catch (SQLException e) {
e.printStackTrace();
}
return rs;
}

// 查询所有学生信息，并且返回List
public List<Student> queryAllStudent() {
List<Student> listStudent = new ArrayList<Student>();
String sql = "select * from student";
System.out.println("------查询所有学生信息------");
System.out.println("sql语句:" + sql);
DBUtil db = new DBUtil();
ResultSet rs = null;
try {
rs = db.executeQuery(sql);
while (rs.next()) {
Student studentTmp = new Student();
studentTmp.setsId(rs.getString("sId"));
studentTmp.setsName(rs.getString("sName"));
studentTmp.setsSex(rs.getString("sSex"));
studentTmp.setsCollege(rs.getString("sCollege"));
studentTmp.setsC(rs.getString("sC"));
studentTmp.setsMath(rs.getString("sMath"));
studentTmp.setsEnglish(rs.getString("sEnglish"));
studentTmp.setsChinese(rs.getString("sChinese"));
studentTmp.setsJava(rs.getString("sJava"));
listStudent.add(studentTmp);
}
} catch (SQLException e) {

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

e.printStackTrace();
}
db.close();
}
return listStudent;
}

public static int getprogress() {
return progress;
}

// 按照条件查询
public ResultSet queryByCondition(String[] data) {
ResultSet rs = null;
String sql = "select * from student where 1=1";
int i = 0;
// 学号
if (!(data[0].equals(""))) {
sql += " and sid='" + data[0] + "' ";
}
// 姓名
if (!(data[1].equals(""))) {
sql += " and sname='" + data[1] + "' ";
}
// 省份
if (!(data[2].equals(""))) {
sql += " and senglish='" + data[2] + "' ";
}
// 性别
if (!(data[3].equals(""))) {
sql += " and ssex='" + data[3] + "' ";
}

System.out.println("------查询所有学生信息------");
System.out.println("sql语句:" + sql);

DBUtil db = new DBUtil();
try {
rs = db.executeQuery(sql);
} catch (SQLException e) {

e.printStackTrace();
}

return rs;
}

// 插入学生信息，并且返回插入结果
public boolean insertStudentInformation(Student student) {
DBUtil DBUtil = new DBUtil();
// 通过student对象设置sid的值
String sid = student.getsId();
String sname = student.getsName();
String ssex = student.getsSex();
String scollege = student.getsCollege();
String sc = student.getsC();
String smath = student.getsMath();
String senglish = student.getsEnglish();
String schinese = student.getsChinese();
String sjava = student.getsJava();

String sql = "insert into student(sid,sname,ssex,scollege,sc,smath,senglish,schinese,sjava)" +
"values('" + sid + "','" + sname + "','" + ssex + "','" + scollege+ "','" + sc+ "','"
+ smath + "','" + senglish + "','" + schinese + "','" + sjava + "')";

System.out.println("------插入学生信息------");
System.out.println("sql语句:" + sql);

// 向数据库插入数据语句
// 定义一个boolean型变量，用于判断插入数据是否成功
boolean flag = false;
try {
// 更新数据库信息
flag = DBUtil.executeUpdate(sql);
} catch (SQLException e) {
e.printStackTrace();
}
DBUtil.close();
// 返回执行结果
return flag;

}

// 统计同一学号有多少人
public int queryForsidinformation(String sid) {
DBUtil db = new DBUtil();
// 通过sid查询数据库中是否有相同sid数据
String sql = "select * from student where sid=" + sid;
System.out.println("------验证学生学号信息------");
System.out.println("sql语句:" + sql);
ResultSet rs = null;
int count = 0;
try {
// 更新数据库保存到结果集里
rs = (ResultSet) db.executeQuery(sql);
// 找到相同的count++
if (rs.next()) {
count++;
}
} catch (SQLException e) {
e.printStackTrace();
}
// 关闭数据库连接
db.close();
// 返回count
return count;
}

// 更新学生信息，这里学号不能更新
public boolean updateStudentInformation(Student student) {
DBUtil DBUtil = new DBUtil();
// scollege,sc,smath,senglish,schinese,sjava
String sql = "update student set sname=" + "'" + student.getsName() + "'" + " ,"
+ " ssex=" + "'" + student.getsSex() + "'" + " ,"
+ " scollege=" + "'" + student.getsCollege() + "' " + " ,"
+ " sc=" + "'" + student.getsC() + "' " + " ,"
+ " smath=" + "'" + student.getsMath() + "' " + " ,"
+ " senglish=" + "'" + student.getsEnglish() + "'" + ","
+ " schinese=" + "'" + student.getsChinese() + "'" + " ,"
+ " sjava=" + "'" + student.getsJava()+ "'"
+ " where" + " sid=" + "'"+ student.getsId() + "'";
System.out.println("------更新学生信息------");
System.out.println("sql语句:" + sql);

boolean flag = false;
try {
flag = DBUtil.executeUpdate(sql);
} catch (SQLException e) {
e.printStackTrace();
}
return flag;
}

// 删除学生信息
public boolean deleteStudentInfoBySid(String sid) {
boolean flag = false;
String sql = "delete from student where sid=" + "'" + sid + "'";

System.out.println("------删除学生信息------");
System.out.println("sql语句:" + sql);

DBUtil DBUtil = new DBUtil();
try {
flag = DBUtil.executeUpdate(sql);
} catch (SQLException e) {
e.printStackTrace();
}
return flag;
}
}

LoginFrame.java

package com.sjsq.view;

import org.jb2011.lnf.beautyeye.ch3_button.BEButtonUI;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.Timer;
import javax.swing.UIManager;

import com.sjsq.model.User;
import com.sjsq.util.MD5Util;
import com.sjsq.dao.UserDao;

public class LoginFrame extends JFrame implements ActionListener {
public static String uname = null;
public static String pwd = null;
String username, password, login, quit;

// 登录标签
private JLabel loginJLabel;
private JPanel jContentPane = null;
private JButton jButtonLogin = null;
private JButton jButtonExit = null;
private JTextField jTextFieldUserName = null;
private JTextField jTextFieldPassWord = null;
// 登录用户名
static int storeUserId;
// 图片
public JLabel jLabel_Image = null;
// 登录用户名
public static String storeUserame = null;
// 登录密码
public static String storeUserPassword = null;
// 重新登陆标记
static boolean RELOAD = true;
private JLabel jLabelUserName = null;
private JLabel jLabelPassWord = null;

int index;

public LoginFrame() {
// 设置背景
setForeground(new Color(255, 255, 255));
this.setResizable(false);
this.setSize(800, 500);
this.setTitle("学生成绩管理系统");

this.setLocationRelativeTo(null);
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");// 使用windows外观
} catch (Exception e) {
e.printStackTrace();
}

loginJLabel = new JLabel("学生成绩管理系统");
Font font = new Font("微软雅黑",Font.BOLD,40);
loginJLabel.setFont(font);
loginJLabel.setBounds(220,100,650, 50);
loginJLabel.setForeground(Color.DARK_GRAY);
getContentPane().add(loginJLabel);

Font font2 = new Font("微软雅黑",Font.BOLD,15);
jLabelPassWord = new JLabel();
jLabelPassWord.setFont(font2);
jLabelPassWord.setBounds(new Rectangle(300, 250, 71, 29));
jLabelPassWord.setText("用户名：");
jLabelUserName = new JLabel();
jLabelUserName.setBounds(new Rectangle(300, 300, 71, 29));
jLabelUserName.setFont(font2);
jLabelUserName.setText("密码：");

// 账号输入框
jTextFieldUserName = new JTextField(20);
jTextFieldUserName.setBounds(new Rectangle(360, 250, 154, 33));
// 密码输入框
jTextFieldPassWord = new JPasswordField();
jTextFieldPassWord.setBounds(new Rectangle(360, 300, 154, 33));

// 登录
jButtonLogin = new JButton();
jButtonLogin.setBounds(new Rectangle(320, 380, 78, 26));
jButtonLogin.setText("登录");
jButtonLogin.setUI(new BEButtonUI()
.setNormalColor(BEButtonUI.NormalColor.green));
// 回车登录
getRootPane().setDefaultButton(jButtonLogin);

// 退出
jButtonExit = new JButton();
jButtonExit.setUI(new BEButtonUI()
.setNormalColor(BEButtonUI.NormalColor.lightBlue));
jButtonExit.setBounds(new Rectangle(420, 380, 78, 26));
jButtonExit.setText("退出");

// 包含所有的元素
jContentPane = new JPanel();
jContentPane.setLayout(null);
jContentPane.add(jLabelUserName, null);
jContentPane.add(jLabelPassWord, null);
jContentPane.add(jButtonLogin, null);
jContentPane.add(jButtonExit, null);
jContentPane.add(jTextFieldUserName, null);
jContentPane.add(jTextFieldPassWord, null);
getContentPane().add(jContentPane);

jTextFieldUserName.addKeyListener(new KeyListener() {
@Override
public void keyPressed(KeyEvent e) {

}
@Override
public void keyReleased(KeyEvent e) {

}
@Override
public void keyTyped(KeyEvent e) {
if(e.getKeyChar() == KeyEvent.VK_ENTER){
jTextFieldPassWord.requestFocus();
}
}
});

jTextFieldPassWord.addKeyListener(new KeyListener() {
@Override
public void keyTyped(KeyEvent e) {

}
@Override
public void keyReleased(KeyEvent e) {

}
@Override
public void keyPressed(KeyEvent e) {
if(e.getKeyChar() == KeyEvent.VK_ENTER){
username = jTextFieldUserName.getText();
password = MD5Util.string2MD5(jTextFieldPassWord.getText());

User user = new User();
user.setUsername(username);
user.setPassword(password);
String s=user.getUsername();
String p=jTextFieldPassWord.getText();
UserDao userDao = new UserDao();
int choice = 0;
if(!userDao.checkUser(user)) {
JOptionPane.showMessageDialog(null, "用户名和密码错误","消息提示",JOptionPane.WARNING_MESSAGE);
}else {
setVisible(false);
MainMenuFrame MM = new MainMenuFrame();
uname = s;
pwd=p;
}
}
}
});

this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setVisible(true);

// 添加监控
jTextFieldUserName.addActionListener(this);
jTextFieldPassWord.addActionListener(this);
jButtonLogin.addActionListener(this);
jButtonExit.addActionListener(this);
}

@Override
public void actionPerformed(ActionEvent e) {

// 获取账号和密码
username = jTextFieldUserName.getText();
password = MD5Util.string2MD5(jTextFieldPassWord.getText());

User user = new User();
user.setUsername(username);
user.setPassword(password);
String s = user.getUsername();
String p = jTextFieldPassWord.getText();
UserDao userDao = new UserDao();
int choice = 0;

if (e.getSource() == jButtonLogin) {
if (!userDao.checkUser(user)) {
JOptionPane.showMessageDialog(null, "用户名和密码错误", "消息提示", JOptionPane.WARNING_MESSAGE);
} else {
setVisible(false);
MainMenuFrame MM = new MainMenuFrame();
uname = s;
pwd = p;
}
} else if (e.getSource() == jButtonExit) {
System.exit(0);
}
}

// 测试
public static void main(String[] args) {
new LoginFrame();
}
}

MainMenuFrame.java

package com.sjsq.view;

import java.awt.Font;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

import org.jb2011.lnf.beautyeye.ch3_button.BEButtonUI;

/*
* 登陆成功后主界面
*/
public class MainMenuFrame extends JFrame implements ActionListener {
private JFrame mainmenu;
private JTextArea text;
// 标题栏（关于）
private JMenuBar menuBar1;
private JMenuItem aboutSystem;

public MainMenuFrame() {

mainmenu();
}

public void mainmenu() {
mainmenu = new JFrame("极客大学学生管理系统");
setLocationRelativeTo(null);// 将容器显示在屏幕中央
mainmenu.setSize(850, 650);

mainmenu.getContentPane().add(new JScrollPane(text));

JPanel jContentPane = new JPanel();
jContentPane.setLayout(null);

// 查询学生按钮
JButton jButtonSelect = new JButton();
jButtonSelect.setBounds(new Rectangle(320, 100, 100, 52));
jButtonSelect.setText("查询学生");
jButtonSelect.setUI(new BEButtonUI().setNormalColor(BEButtonUI.NormalColor.lightBlue));
getRootPane().setDefaultButton(jButtonSelect);// 回车登录

// 添加学生按钮
JButton jButtonAdd = new JButton();
jButtonAdd.setUI(new BEButtonUI().setNormalColor(BEButtonUI.NormalColor.lightBlue));
jButtonAdd.setBounds(new Rectangle(320, 200, 100, 52));
jButtonAdd.setText("添加学生");

// 修改密码按钮
JButton jButtonAlterPwd = new JButton();
jButtonAlterPwd.setUI(new BEButtonUI().setNormalColor(BEButtonUI.NormalColor.lightBlue));
jButtonAlterPwd.setBounds(new Rectangle(320, 300, 100, 52));
jButtonAlterPwd.setText("密码修改");

// 退出系统按钮
JButton jButtonExit = new JButton();
jButtonExit.setUI(new BEButtonUI().setNormalColor(BEButtonUI.NormalColor.lightBlue));
jButtonExit.setBounds(new Rectangle(320, 400, 100, 52));
jButtonExit.setText("退出系统");

jContentPane.add(jButtonSelect, null);
jContentPane.add(jButtonAdd, null);
jContentPane.add(jButtonAlterPwd, null);
jContentPane.add(jButtonExit, null);

// 添加Label到Frame
mainmenu.getContentPane().add(jContentPane);
// 设置字体
Font font = new Font("微软雅黑", Font.BOLD, 16);
// 标题栏
menuBar1 = new JMenuBar();

// aboutSystem = new JMenuItem("关于本系统",new
// ImageIcon("src/images/icons/about.png"));
aboutSystem = new JMenuItem("关于本系统");
aboutSystem.setMnemonic('H');

menuBar1.add(aboutSystem);

// 查询学生
jButtonSelect.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
System.out.println("------查询学生-----");
QueryStudentInfo queryStudentInfo = new QueryStudentInfo();
}
});

// 添加学生
jButtonAdd.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
System.out.println("------添加学生-----");
AddStudentInfo addStudentInfo = new AddStudentInfo();
}
});

// 修改密码
jButtonAlterPwd.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
System.out.println("------修改密码-----");
ModifyPasswordInfo modifyPasswordInfo = new ModifyPasswordInfo();
}
});

// 退出系统
jButtonExit.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
System.out.println("------退出系统-----");
System.exit(1);
}
});

// 关于系统
aboutSystem.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
System.out.println("------关于系统------");
AboutSystem aboutSystem = new AboutSystem();
}
});

// 关闭窗口监控
mainmenu.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent arg0) {
System.exit(1);
}
});

mainmenu.setJMenuBar(menuBar1);
mainmenu.setVisible(true);
// mainmenu.setLocation(250, 50);
mainmenu.setLocationRelativeTo(null);
aboutSystem.addActionListener(this);
}

// 主函数测试
public static void main(String[] args) {
new MainMenuFrame();

}

@Override
public void actionPerformed(ActionEvent arg0) {
}

}

来源：https://blog.csdn.net/helongqiang/article/details/110938804