学生成绩管理java代码学生成绩管理系统java课程设计

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求用Java编写的学生成绩管理系统的完整代码

package jdbcproj;

import java.sql.*;

import java.awt.BorderLayout;

import java.awt.EventQueue;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JTextField;

import javax.swing.JButton;

import java.awt.event.ActionListener;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.SQLException;

import java.awt.event.ActionEvent;

public class MainFrame extends JFrame {

private JPanel contentPane;

private JTextField txtname;

private JTextField txtpassword;

/**

* Launch the application.

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() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 661, 399);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

contentPane.setLayout(null);

JLabel lblNewLabel = new JLabel("\u7528\u6237\u540D");

lblNewLabel.setBounds(114, 51, 72, 18);

contentPane.add(lblNewLabel);

JLabel lblNewLabel_1 = new JLabel("\u5BC6\u7801");

lblNewLabel_1.setBounds(114, 106, 72, 18);

contentPane.add(lblNewLabel_1);

txtname = new JTextField();

txtname.setBounds(261, 48, 86, 24);

contentPane.add(txtname);

txtname.setColumns(10);

txtpassword = new JTextField();

txtpassword.setBounds(261, 103, 86, 24);

contentPane.add(txtpassword);

txtpassword.setColumns(10);

JButton btnadd = new JButton("\u589E\u52A0");

btnadd.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

if(txtname.getText().equals("")||txtpassword.getText().equals(""))

{

JOptionPane.showMessageDialog(getContentPane(), "用户名和密码不能为空","提示信息框",JOptionPane.WARNING_MESSAGE);

}

else{

Users u=new Users();

u.setPwd(txtpassword.getText());

u.setUsername(txtname.getText());

UserDAO usdo=new UserDAO();

usdo.addUser(u);

}

});

btnadd.setBounds(45, 205, 113, 27);

contentPane.add(btnadd);

JButton btndelete = new JButton("\u5220\u9664");

btndelete.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent arg0) {

if(txtname.getText().equals(""))

{

JOptionPane.showMessageDialog(getContentPane(), "用户名不能为空","提示信息框",JOptionPane.WARNING_MESSAGE);

}

else{

UserDAO usdo=new UserDAO();

usdo.delUser(txtname.getText());;

}

});

btndelete.setBounds(172, 205, 113, 27);

contentPane.add(btndelete);

JButton btnupdate = new JButton("\u4FEE\u6539");

btnupdate.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

if(txtname.getText().equals("")||txtpassword.getText().equals(""))

{

JOptionPane.showMessageDialog(getContentPane(), "用户名和密码不能为空","提示信息框",JOptionPane.WARNING_MESSAGE);

}

else{

Users u=new Users();

u.setPwd(txtpassword.getText());

u.setUsername(txtname.getText());

UserDAO usdo=new UserDAO();

usdo.updateUser(u);;

}

});

btnupdate.setBounds(300, 205, 113, 27);

contentPane.add(btnupdate);

JButton btnfind = new JButton("\u67E5\u8BE2");

btnfind.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

if(txtname.getText().equals(""))

{

JOptionPane.showMessageDialog(getContentPane(), "用户名不能为空","提示信息框",JOptionPane.WARNING_MESSAGE);

}

else{

Users u=new Users();

UserDAO usdo=new UserDAO();

u=usdo.findUser(txtname.getText(), txtpassword.getText());

if(u!=null){

JOptionPane.showMessageDialog(getContentPane(), "该用户存在！","提示信息框",JOptionPane.WARNING_MESSAGE);

}

else{

JOptionPane.showMessageDialog(getContentPane(), "该用户不存在！","提示信息框",JOptionPane.WARNING_MESSAGE);

}

});

btnfind.setBounds(427, 205, 113, 27);

contentPane.add(btnfind);

//记得要写这个

setVisible(true);

}

相关问答

Q1: java代码关于学生成绩管理系统的若干疑问？

str改变和sum没关系啊 str已经指向一个新的地址你不会以为他还跟sum有联系吧 String是不可变的

Q2: 用java编写学生管理系统

我也是初学写的不好

public class Student {

static int[] gradesArray={87,68,94,100,83,78,85,91,76,87};

public Student(int[]gradesArray){

}

public void printAllGrade(){

for (int i = 0; i gradesArray.length; i++) {

System.out.println("学号"+(i+1)+"成绩是"+gradesArray[i]);

}

public void printAvarage(){

double sum = 0;

for (int i = 0; i gradesArray.length; i++) {

sum+=gradesArray[i];

}

System.out.println("\n平均成绩是"+sum/gradesArray.length);

}

public void printMax(){

int max=gradesArray[0];

for (int i = 0; i gradesArray.length; i++) {

if(gradesArray[i]max){

max=gradesArray[i];

}

System.out.println("\n最高分时"+max);

}

public void printMin(){

int min=gradesArray[0];

for (int i = 0; i gradesArray.length; i++) {

if (gradesArray[i]min){

min=gradesArray[i];

}

System.out.println("\n最低分时"+min);

}

public void printDistribution(){

int a=0,b=0,c=0,d=0,e=0,f=0,g=0,h=0,j=0,k=0;

for (int i = 0; i gradesArray.length; i++) {

if(gradesArray[i]10){

a++;

}else if (gradesArray[i]=10gradesArray[i]20) {

b++;

}

else if (gradesArray[i]=20gradesArray[i]30) {

c++;

}

else if (gradesArray[i]=30gradesArray[i]40) {

d++;

}

else if (gradesArray[i]=40gradesArray[i]50) {

e++;

}

else if (gradesArray[i]=50gradesArray[i]60) {

f++;

}

else if (gradesArray[i]=60gradesArray[i]70) {

g++;

}

else if (gradesArray[i]=70gradesArray[i]80) {

h++;

}

else if (gradesArray[i]=80gradesArray[i]90) {

j++;

}

else if (gradesArray[i]=90gradesArray[i]100) {

k++;

}

System.out.println("\n成绩分布是");

System.out.print("0-10：");

for (int i = 0; i =a; i++) {

System.out.print("*");

}

System.out.print("10-20：");

for (int i = 0; i =b; i++) {

System.out.print("*");

}

System.out.print("20-30：");

for (int i = 0; i =c; i++) {

System.out.print("*");

}

System.out.print("30-40：");

for (int i = 0; i =d; i++) {

System.out.print("*");

}

System.out.print("40-50：");

for (int i = 0; i =e; i++) {

System.out.print("*");

}

System.out.print("50-60：");

for (int i = 0; i =f; i++) {

System.out.print("*");

}

System.out.print("60-70：");

for (int i = 0; i =g; i++) {

System.out.print("*");

}

System.out.print("70-80：");

for (int i = 0; i =h; i++) {

System.out.print("*");

}

System.out.print("80-90：");

for (int i = 0; i =j;i++) {

System.out.print("*");

}

System.out.print("90-100：");

for (int i = 0; i =k; i++) {

System.out.print("*");

}

public static void main(String[] args) {

Student student=new Student(gradesArray);

student.printAllGrade();

student.printAvarage();

student.printMax();

student.printMin();

student.printDistribution();

}

Q3: 基于java设计一个学生成绩管理系统，要求有界面，且有增加，查询，修改，删除，退出功能，代码如何写？

import java.awt.Color;

import java.awt.Font;

import java.awt.Frame;

import java.awt.Label;

import java.awt.TextField;

import java.awt.Window;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.sql.SQLException;

import javax.swing.JButton;

public class Stmessege {

Font font = new Font("楷体", Font.BOLD, 18);

private Frame m = new Frame("登陆成功界面");

protected Window f;

public Stmessege() {

m.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent evt) {

m.setVisible(false);

m.dispose();

System.exit(0);

}

});

m.setSize(460, 360);

m.setBackground(Color.green);

m.setLayout(null);

m.setLocationRelativeTo(null);

Label l0 = new Label("管理员信息");

Font font1 = new Font("楷体", Font.BOLD, 32);

l0.setForeground(Color.blue);

l0.setSize(180, 50);

l0.setLocation(150, 30);

l0.setFont(font1);

final Label l1 = new Label("姓名：");

l1.setSize(60, 20);

l1.setLocation(10, 100);

l1.setFont(font);

TextField tf1 = new TextField("黄朋");

tf1.setForeground(Color.blue);

tf1.setBackground(Color.white);

tf1.setSize(50, 20);

tf1.setLocation(70, 100);

final Label l2 = new Label("学号：");

l2.setSize(60, 20);

l2.setLocation(140, 100);

l2.setFont(font);

TextField tf2 = new TextField("111265");

tf2.setForeground(Color.blue);

tf2.setBackground(Color.white);

tf2.setSize(60, 20);

tf2.setLocation(190, 100);

final Label l3 = new Label("性别：");

l3.setSize(60, 20);

l3.setLocation(280, 100);

l3.setFont(font);

TextField tf3 = new TextField("男");

tf3.setForeground(Color.blue);

tf3.setBackground(Color.white);

tf3.setSize(40, 20);

tf3.setLocation(360, 100);

final Label l4 = new Label("班级：");

l4.setSize(60, 20);

l4.setLocation(10, 170);

l4.setFont(font);

TextField tf4 = new TextField("611231");

tf4.setForeground(Color.blue);

tf4.setBackground(Color.white);

tf4.setSize(60, 20);

tf4.setLocation(67, 170);

final Label l5 = new Label("系别：");

l5.setSize(60, 20);

l5.setLocation(140, 170);

l5.setFont(font);

TextField tf5 = new TextField("计算机工程系");

tf5.setForeground(Color.blue);

tf5.setBackground(Color.white);

tf5.setSize(80, 20);

tf5.setLocation(200, 170);

final Label l6 = new Label("成绩：");

l6.setSize(60, 20);

l6.setLocation(280, 170);

l6.setFont(font);

TextField tf6 = new TextField("95");

tf6.setForeground(Color.blue);

tf6.setBackground(Color.white);

tf6.setSize(40, 20);

tf6.setLocation(360, 170);

final Label l7 = new Label("专业：");

l7.setSize(60, 20);

l7.setLocation(10, 230);

l7.setFont(font);

TextField tf7 = new TextField("软件技术");

tf7.setForeground(Color.blue);

tf7.setBackground(Color.white);

tf7.setSize(60, 20);

tf7.setLocation(70, 230);

JButton btn1 = new JButton("添加");

btn1.setForeground(Color.blue);

btn1.setSize(80, 38);

btn1.setLocation(35, 300);

btn1.setFont(font);

btn1.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

new 插入();

m.setVisible(true);

}

});

JButton btn2 = new JButton("查询学生学籍信息");

btn2.setForeground(Color.blue);

btn2.setSize(200, 38);

btn2.setLocation(135, 300);

btn2.setFont(font);

btn2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

Stmessege1 f;

try {

f = new Stmessege1();

f.Stmessege11();

m.setVisible(true);

} catch (SQLException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

} catch (ClassNotFoundException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

});

JButton btn3 = new JButton("删除");

btn3.setForeground(Color.blue);

btn3.setSize(80, 38);

btn3.setLocation(350, 300);

btn3.setFont(font);

btn3.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

new 删除();

//f.setVisible(false);

m.setVisible(true);

}

});

JButton btn4 = new JButton("更新");

btn4.setForeground(Color.blue);

btn4.setSize(80, 38);

btn4.setLocation(200, 230);

btn4.setFont(font);

btn4.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

new 更新();

m.setVisible(true);

}

});

m.add(l0);

m.add(l1);

m.add(tf1);

m.add(l2);

m.add(tf2);

m.add(l3);

m.add(tf3);

m.add(l4);

m.add(tf4);

m.add(l5);

m.add(tf5);

m.add(l6);

m.add(tf6);

m.add(l7);

m.add(tf7);

m.add(btn1);

m.add(btn2);

m.add(btn3);

m.add(btn4);

m.setVisible(true);

}

public static void main(String[] args) {

new Stmessege();

}

可以仿照我的做一下，希望采纳，我才一级哦

Q4: 如何用Java语言编写学生成绩管理系统

写过一个类似学生成绩管理java代码的给学生成绩管理java代码了学生成绩管理java代码你吧

package student;

import java.util.Scanner;

public class teststudent {

public static void main(String args[]){

System.out.println("************************学生成绩管理系统*********************");

System.out.println("请输入要管理学生成绩管理java代码的学生人数:");

Scanner sc = new Scanner(System.in);

int n = sc.nextInt();

studentMassage stum = new studentMassage(n);

int flag = 1;

while(flag == 1){

System.out.println("1.输入学生信息");

System.out.println("2.通过姓名查找学生信息");

System.out.println("3.显示全部学生信息");

System.out.println("4.退出系统");

int op = sc.nextInt();

switch(op){

case 1:stum.addStudent(n);

new Scanner(System.in).nextLine();

break;

case 2:

System.out.println("输入学生姓名：");

String name = sc.next();

stum.FindStudent(name);

new Scanner(System.in).nextLine();

break;

case 3:

stum.showallStudent();

new Scanner(System.in).nextLine();

break;

case 4:

flag = 0;

System.out.println("已退出系统！");

break;

default:

System.out.println("输入有误！");

new Scanner(System.in).nextLine();

}

class Date{

int year;

int month;

int day;

/*public Date(int year,int month,int day){

this.year = year;

this.month = month;

this.day = day;

}

public Date(){}*/

public String showDate(){

return year + "/"+ month+"/"+day;

}

class student{

int id;

String name;

Date date;

float score;

public student(){

id = 0;

name = null;

date = null;

score = 0f;

}

public void showStudent(){

System.out.println( id + " " + name + " "+ " " + date.showDate()+" "+score);

}

class studentMassage{

private student[] stu;

private int flag;

public studentMassage(int n){

flag = 0;

if(stu == null){

stu = new student[n];

for(int i =0;in;++i){

stu[i] = new student();

}

public void addStudent(int n){

flag = 1;

Scanner sc = new Scanner(System.in);

System.out.println("请输入"+n+"个学生信息");

for(int i = 0 ;istu.length;++i){

stu[i].date = new Date();

System.out.println("请输入第"+(i+1)+"个学生学号：");

stu[i].id = sc.nextInt();

System.out.println("请输入第"+(i+1)+"个学生姓名：");

stu[i].name = sc.next();

System.out.println("请输入第"+(i+1)+"个学生出生年份：");

stu[i].date.year = sc.nextInt();

System.out.println("请输入第"+(i+1)+"个学生出生月份：");

stu[i].date.month = sc.nextInt();

System.out.println("请输入第"+(i+1)+"个学生出生日期：");

stu[i].date.day = sc.nextInt();

//stu[i].date = new Date(year,month,day);

System.out.println("请输入第"+(i+1)+"个学生分数：");

stu[i].score = sc.nextFloat();

}

public void FindStudent(String sname){

student find = null;

if(flag != 0){

for(int i = 0;istu.length;++i){

if(sname.equals(stu[i].name))

find = stu[i];

}

if(find == null)

System.out.println("查无此人！");

else

find.showStudent();

}else

System.out.println("没有输入学生信息！");

}

public void showallStudent(){

System.out.println("所有学生的信息如下：");

System.out.println("学号姓名生日分数");

for(int i = 0;istu.length;++i){

stu[i].showStudent();

}

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正文

求用Java编写的学生成绩管理系统的完整代码

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