系统要求
数据库stu包含两个表：
①user：用户表，字段为（id，password），用于实现登录功能。
②student：学生表，字段为（snum，sname，ssex，sbirth，sethnic，syear，shome，smajor，scollege）
此系统功能包括：
① 登录：根据用户表的 id 和 password 登录。
先登录成功后才能对学生信息进行操作。（即登录成功后才可弹出学生管理系统界面）
② 查询：根据学号查询信息。
③ 修改：根据学号对学生信息进行修改。
④ 插入：加入新生的信息。
⑤ 删除：删除指定学号的学生信息。
实现流程
① 在 MysqL 建 stu 库，完成后，在 stu 库内建 user 和 student 表。 并在 user 和 student 添加几条记录（填几行信息）。
② 在eclipse创建相应的文件、包、类，并导入 jar 包。（不会导的话百度下）
导入成功后应该会出现这个：
③ 把几个类的代码写好。
代码
主类test11：
package 学生信息管理系统;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
class J10 extends JFrame{
J10(){
setTitle("学生登陆界面");
setSize(400,150);
setVisible(true);
}
}
class J11 extends J10{
JTextField t1;
jpasswordfield pass;
J11(){
t1 = new JTextField(12);//文本框
pass = new jpasswordfield(12);//密码框
JLabel l1 = new JLabel("账号："); JLabel l2 = new JLabel("密码："); //标签对象
setLayout(new GridLayout(2,1)); //网格布局管理器
JPanel p1 = new JPanel(); JPanel p2 = new JPanel();
p1.add(l1); p2.add(l2);
p1.add(t1); p2.add(pass);
add(p1); add(p2);
}
}
class J12 extends J11 implements ActionListener{
JButton b1,b2;
Object obj;
J12(){
setLayout(new GridLayout(3,1));
JPanel p3 = new JPanel();
b1 = new JButton("登录"); b2 = new JButton("注册");
b1.addActionListener(this);
b2.addActionListener(this);
p3.add(b1);p3.add(b2);add(p3);
}
public void actionPerformed(ActionEvent e) {
Object obj = e.getSource();
if(obj == b1){
String name = this.t1.getText();
String passw = this.pass.getText();
boolean t = false;
try {
JDB1 x = new JDB1();
x.OpenConn();
t = x.login(name, passw);
} catch (Exception e1) {
e1.printstacktrace();
}
if(t == true)
{
System.out.println("登陆成功！");
new J31().setVisible(true);
}
else {
System.out.println("登陆失败！");
new J10().setTitle("登录失败！！！");
}
}
}
}
class J31 extends J10 implements ActionListener{
JMenuBar mainMenu = new JMenuBar(); //创建菜单栏
JMenu menuSystem = new JMenu("系统管理");
JMenuItem itemOpen = new JMenuItem("打开");
JMenuItem itemExit = new JMenuItem("退出");
JMenu menuStu = new JMenu("学生管理");
JMenuItem itemAdds = new JMenuItem("增加");
JMenuItem itemEdits = new JMenuItem("修改");
JMenuItem itemDeletes = new JMenuItem("删除");
JMenuItem itemSearch = new JMenuItem("查询");
Font t = new Font("Dialog",0,12);
J31(){
itemAdds.addActionListener(this);
itemEdits.addActionListener(this);
itemDeletes.addActionListener(this);
itemSearch.addActionListener(this);
itemExit.addActionListener(this);
this.pack();
setTitle("学生管理信息系统主界面"); setSize(400,300);
menuSystem.setFont(t);
menuSystem.add(itemOpen); menuSystem.add(itemExit);
menuStu.add(itemAdds); menuStu.add(itemEdits); menuStu.add(itemDeletes); menuStu.add(itemSearch);
mainMenu.add(menuSystem); mainMenu.add(menuStu);
this.setJMenuBar(mainMenu);
}
public void actionPerformed(ActionEvent e) {
Object obj = e.getSource();
if(obj == itemAdds) {
new add().setVisible(true);
}
else if(obj == itemEdits) {
new alter().setVisible(true);
}
else if(obj == itemDeletes) {
new delete().setVisible(true);
}
else if(obj == itemSearch) {
new select().setVisible(true);
}
else if(obj == itemExit) {
this.dispose();
}
}
}
public class test11{
public static void main(String []args) {
J12 x = new J12();
x.setVisible(true);
x.setResizable(false);
x.setLocationRelativeto(null); //居中
}
}
JDB1：
package 学生信息管理系统;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.sqlException;
public class JDB1 {
static Connection conn = null;
static java.sql.Statement stmt;
static ResultSet rs;
static String sql;
//数据库连接操作方法
public static void OpenConn() throws Exception{
try {
Class.forName("com.MysqL.jdbc.Driver");
String url = "jdbc:MysqL://localhost:3306/stu?useSSL=false";
String username = "root"; String password = "123456";//密码是你安装MysqL时的密码
conn = DriverManager.getConnection(url,username,password);
if(conn != null) System.out.println("数据库连接成功");
}catch(Exception e) {
System.err.println("数据库连接："+e.getMessage()+"\n");
}
}
//信息比对 登录时使用
public static boolean login(String lname,String lpassword) throws sqlException {
stmt = conn.createStatement();
sql = "select password from user where id="+"'"+lname+"'";
rs = stmt.executeQuery(sql);
while(rs.next()) {
if(rs.getString("password").equals(lpassword)) {
System.out.println("密码正确！");
return true;
}else {
System.out.println("密码错误！");
return false;
}
}
return false;
}
//执行数据查询的方法
public ResultSet executeQuery(String sql) {
stmt = null; rs = null;
try {
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
rs = stmt.executeQuery(sql);
}catch(sqlException e) {
System.err.println("查询数据："+e.getMessage());
}
return rs;
}
//执行创建数据表、插入数据等操作
public void execute(String sql) {
stmt = null; rs = null;
try {
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
stmt.execute(sql);
}catch(sqlException e) {
System.err.println(e.getMessage());
}
}
//更新数据库操作方法
public void executeUpdate(String sql) {
stmt = null; rs = null;
try {
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
stmt.execute(sql);
conn.setAutoCommit(false);
conn.commit();//提交
}catch(sqlException e) {
System.err.println("更新数据"+e.getMessage());
}
}
//关闭statement对象的方法
public void closeStmt() {
try {
stmt.close();
}catch(sqlException e){
System.err.println("释放对象"+e.getMessage());
}
}
//关闭数据库的方法
public void closeConn() {
try {
conn.close();
}catch(sqlException e) {
System.err.println("释放对象"+e.getMessage());
}
}
}
add：
package 学生信息管理系统;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
class add extends J10 implements ActionListener{ //增加
JButton b3;
JTextField t1,t2,t3,t4,t5,t6,t7,t8,t9;
add(){
setSize(600,300);
setTitle("增加学生信息");
t1 = new JTextField(10);
t2 = new JTextField(10);
t3 = new JTextField(10);
t4 = new JTextField(10);
t5 = new JTextField(10);
t6 = new JTextField(10);
t7 = new JTextField(10);
t8 = new JTextField(10);
t9 = new JTextField(10);
JLabel l1 = new JLabel("姓名：");
JLabel l2 = new JLabel("学号：");
JLabel l3 = new JLabel("性别：");
JLabel l4 = new JLabel("民族：");
JLabel l5 = new JLabel("学院：");
JLabel l6 = new JLabel("专业：");
JLabel l7 = new JLabel("籍贯：");
JLabel l8 = new JLabel("出生日期：");
JLabel l9 = new JLabel("入学日期：");
setLayout(new GridLayout(5,2));
JPanel p1 = new JPanel();
JPanel p2 = new JPanel();
JPanel p3 = new JPanel();
JPanel p4 = new JPanel();
JPanel p5 = new JPanel();
JPanel p6 = new JPanel();
JPanel p7 = new JPanel();
JPanel p8 = new JPanel();
JPanel p9 = new JPanel();
p1.add(l1);p2.add(l2);p3.add(l3);p4.add(l4);p5.add(l5);p6.add(l6);p7.add(l7);p8.add(l8);p9.add(l9);
p1.add(t1);p2.add(t2);p3.add(t3);p4.add(t4);p5.add(t5);p6.add(t6);p7.add(t7);p8.add(t8);p9.add(t9);
add(p1);add(p2);add(p3);add(p4);add(p5);add(p6);add(p7);add(p8);add(p9);
JPanel p10 = new JPanel();
b3 = new JButton("增加");
b3.addActionListener(this);
p10.add(b3); add(p10);
}
@Override
public void actionPerformed(ActionEvent e) {
Object obj = e.getSource();
if(obj == b3) {
String name = this.t1.getText();
String num = this.t2.getText();
String sex = this.t3.getText();
String ethnic = this.t4.getText();
String college = this.t5.getText();
String major = this.t6.getText();
String home = this.t7.getText();
String birth = this.t8.getText();
String year = this.t9.getText();
JDB1 x = new JDB1();
try {
x.OpenConn();
String sql = "select * from student where snum="+num;
x.rs = x.executeQuery(sql);
if(x.rs.next()) new J10().setTitle("添加失败！！！");
else new J10().setTitle("添加成功！！！");
sql = "insert into student(snum,sname,ssex,sbirth,shome,sethnic,syear,smajor,scollege) values("+num+",'"+name+"','"+sex+"','"+birth+"','"+home+"','"+ethnic+"','"+year+"','"+major+"','"+college+"')";
System.out.println(sql);
x.execute(sql);
}catch(Exception e1) {
System.err.println(e1.getMessage());
}
x.closeStmt();
x.closeConn();
}
}
public static void main(String []args) {
//new add().setVisible(true);
}
}
delete：
package 学生信息管理系统;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
class delete extends J10 implements ActionListener{ //删除
JButton b3;
JTextField t2;
delete(){
setSize(600,300);
setTitle("删除学生信息");
JTextField t1 = new JTextField(10);
t2 = new JTextField(10);
JTextField t3 = new JTextField(10);
JTextField t4 = new JTextField(10);
JTextField t5 = new JTextField(10);
JTextField t6 = new JTextField(10);
JTextField t7 = new JTextField(10);
JTextField t8 = new JTextField(10);
JTextField t9 = new JTextField(10);
JLabel l1 = new JLabel("姓名：");
JLabel l2 = new JLabel("学号：");
JLabel l3 = new JLabel("性别：");
JLabel l4 = new JLabel("民族：");
JLabel l5 = new JLabel("学院：");
JLabel l6 = new JLabel("专业：");
JLabel l7 = new JLabel("籍贯：");
JLabel l8 = new JLabel("出生日期：");
JLabel l9 = new JLabel("入学日期：");
setLayout(new GridLayout(5,2));
JPanel p1 = new JPanel();
JPanel p2 = new JPanel();
JPanel p3 = new JPanel();
JPanel p4 = new JPanel();
JPanel p5 = new JPanel();
JPanel p6 = new JPanel();
JPanel p7 = new JPanel();
JPanel p8 = new JPanel();
JPanel p9 = new JPanel();
p1.add(l1);p2.add(l2);p3.add(l3);p4.add(l4);p5.add(l5);p6.add(l6);p7.add(l7);p8.add(l8);p9.add(l9);
p1.add(t1);p2.add(t2);p3.add(t3);p4.add(t4);p5.add(t5);p6.add(t6);p7.add(t7);p8.add(t8);p9.add(t9);
add(p1);add(p2);add(p3);add(p4);add(p5);add(p6);add(p7);add(p8);add(p9);
JPanel p10 = new JPanel();
b3 = new JButton("删除");
b3.addActionListener(this);
p10.add(b3); add(p10);
}
@Override
public void actionPerformed(ActionEvent e) {
Object obj = e.getSource();
if(obj == b3) {
String num = this.t2.getText();
JDB1 x = new JDB1();
try {
x.OpenConn();
String sql = "select * from student where snum="+num;
x.rs = x.executeQuery(sql);
if(!x.rs.next()) setTitle("删除失败！！！");
else setTitle("删除成功！！！");
sql = "delete from student where snum="+num;
System.out.println(sql);
x.executeUpdate(sql);
}catch(Exception e1) {
System.err.println(e1.getMessage());
}
x.closeStmt();
x.closeConn();
}
}
public static void main(String []args) {
//new delete().setVisible(true);
}
}
select：
package 学生信息管理系统;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
class select extends J10 implements ActionListener{ //查询
JButton b3;
JTextField t1,t9;
select(){
setSize(600,300);
setTitle("查看学生信息");
t1 = new JTextField(10);
t2 = new JTextField(10);
t3 = new JTextField(10);
t4 = new JTextField(10);
t5 = new JTextField(10);
t6 = new JTextField(10);
t7 = new JTextField(10);
t8 = new JTextField(10);
t9 = new JTextField(10);
JLabel l1 = new JLabel("姓名：");
JLabel l2 = new JLabel("学号：");
JLabel l3 = new JLabel("性别：");
JLabel l4 = new JLabel("民族：");
JLabel l5 = new JLabel("学院：");
JLabel l6 = new JLabel("专业：");
JLabel l7 = new JLabel("籍贯：");
JLabel l8 = new JLabel("出生日期：");
JLabel l9 = new JLabel("入学日期：");
setLayout(new GridLayout(5,2));
JPanel p1 = new JPanel();
JPanel p2 = new JPanel();
JPanel p3 = new JPanel();
JPanel p4 = new JPanel();
JPanel p5 = new JPanel();
JPanel p6 = new JPanel();
JPanel p7 = new JPanel();
JPanel p8 = new JPanel();
JPanel p9 = new JPanel();
p1.add(l1);p2.add(l2);p3.add(l3);p4.add(l4);p5.add(l5);p6.add(l6);p7.add(l7);p8.add(l8);p9.add(l9);
p1.add(t1);p2.add(t2);p3.add(t3);p4.add(t4);p5.add(t5);p6.add(t6);p7.add(t7);p8.add(t8);p9.add(t9);
add(p1);add(p2);add(p3);add(p4);add(p5);add(p6);add(p7);add(p8);add(p9);
JPanel p10 = new JPanel();
b3 = new JButton("查找");
b3.addActionListener(this);
p10.add(b3); add(p10);
}
@Override
public void actionPerformed(ActionEvent e) {
Object obj = e.getSource();
if(obj == b3) {
String num = this.t2.getText();
JDB1 x = new JDB1();
try {
x.OpenConn();
String sql = "select * from student where snum="+num;
x.rs = x.executeQuery(sql);
while(x.rs.next()) {
t1.setText(x.rs.getString("sname"));
t2.setText(x.rs.getString("snum"));
t3.setText(x.rs.getString("ssex"));
t4.setText(x.rs.getString("sethnic"));
t5.setText(x.rs.getString("scollege"));
t6.setText(x.rs.getString("smajor"));
t7.setText(x.rs.getString("shome"));
t8.setText(x.rs.getString("sbirth"));
t9.setText(x.rs.getString("syear"));
}
}catch(Exception e1) {
System.err.println(e1.getMessage());
}
x.closeStmt();
x.closeConn();
}
}
public static void main(String []args) {
//new select().setVisible(true);
}
}
alter：
package 学生信息管理系统;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
class alter extends J10 implements ActionListener{ //修改
JButton b3;
JTextField t1,t9;
alter(){
setSize(600,300);
setTitle("修改学生信息");
t1 = new JTextField(10);
t2 = new JTextField(10);
t3 = new JTextField(10);
t4 = new JTextField(10);
t5 = new JTextField(10);
t6 = new JTextField(10);
t7 = new JTextField(10);
t8 = new JTextField(10);
t9 = new JTextField(10);
JLabel l1 = new JLabel("姓名：");
JLabel l2 = new JLabel("学号：");
JLabel l3 = new JLabel("性别：");
JLabel l4 = new JLabel("民族：");
JLabel l5 = new JLabel("学院：");
JLabel l6 = new JLabel("专业：");
JLabel l7 = new JLabel("籍贯：");
JLabel l8 = new JLabel("出生日期：");
JLabel l9 = new JLabel("入学日期：");
setLayout(new GridLayout(5,2));
JPanel p1 = new JPanel();
JPanel p2 = new JPanel();
JPanel p3 = new JPanel();
JPanel p4 = new JPanel();
JPanel p5 = new JPanel();
JPanel p6 = new JPanel();
JPanel p7 = new JPanel();
JPanel p8 = new JPanel();
JPanel p9 = new JPanel();
p1.add(l1);p2.add(l2);p3.add(l3);p4.add(l4);p5.add(l5);p6.add(l6);p7.add(l7);p8.add(l8);p9.add(l9);
p1.add(t1);p2.add(t2);p3.add(t3);p4.add(t4);p5.add(t5);p6.add(t6);p7.add(t7);p8.add(t8);p9.add(t9);
add(p1);add(p2);add(p3);add(p4);add(p5);add(p6);add(p7);add(p8);add(p9);
JPanel p10 = new JPanel();
b3 = new JButton("修改");
b3.addActionListener(this);
p10.add(b3); add(p10);
}
@Override
public void actionPerformed(ActionEvent e) {
Object obj = e.getSource();
if(obj == b3) {
String name = this.t1.getText();
String num = this.t2.getText();
String sex = this.t3.getText();
String ethnic = this.t4.getText();
String college = this.t5.getText();
String major = this.t6.getText();
String home = this.t7.getText();
String birth = this.t8.getText();
String year = this.t9.getText();
JDB1 x = new JDB1();
try {
x.OpenConn();
String sql = "select * from student where snum="+num;
x.rs = x.executeQuery(sql);
if(x.rs.next()) new J10().setTitle("修改成功！！！");
else new J10().setTitle("修改失败！！！");
sql = "update student set sname = '" + name + "',ssex = '" + sex + "',sbirth = '" + birth + "',shome = '" + home + "',sethnic = '" +ethnic + "',syear = '" + year + "',smajor = '" + major + "',scollege = '" + college + "' where snum = " + num;
System.out.println(sql);
x.executeUpdate(sql);
}catch(Exception e1) {
System.err.println(e1.getMessage());
}
x.closeStmt();
x.closeConn();
}
}
public static void main(String []args) {
//new alter().setVisible(true);
}
}
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