java学生成绩管理系统代码（java学生成绩管理系统）

本文目录

• java学生成绩管理系统
• JAVA：编写一个学生成绩管理系统学生的属性包括学号、姓名、年龄等
• 急求一个Java编写的学生成绩管理系统，数据库最好能是SqlServer先在这儿谢谢大家啦！
• java编写学生成绩管理系统

java学生成绩管理系统

Java学生成绩管理系统源代码：
import Java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.StringTokenizer;
/*
* Created on 2005-1-11
*/
/**
* @author 让炜
* @since 1.0
*
* TODO 学生成绩治理系统
* 通过学号查找,修改,删除数据
*
*/
public class LittleProgram
{
static boolean isDelete = true;
static boolean isFind = true;
public static void main(String args)//主方法,程序从这里开始运行
throws IOException,NumberNotFoundException
{
int choice=-1;
do{
LittleProgram lp = new LittleProgram();
System.out.println();
System.out.println("\t####################################");
System.out.println();
System.out.println("\t\t Java学生成绩治理系统1.1");
System.out.println("\t\t请用学号查找,修改,删除数据");
System.out.println();
System.out.println("\t####################################\n");
System.out.print("1.增加数据:\n"+
"2.查找数据:\n"+
"3.删除数据:\n"+
"4.清除所有数据:\n"+
"5.把数据全部打印到屏幕\n"+
"6.把成绩按学号排序\n"+
"7.修改数据\n"+
"8.统计已记录成绩学生数\n"+
"9.关于作者\n"+
"0.退出程序.\n" +
"输入:");
BufferedReader in = //从终
new BufferedReader( //端接
new InputStreamReader(System.in));//收数
String inputLine = in.readLine(); //字选
choice= Integer.valueOf(inputLine).intValue();//项;
switch(choice)
{
case 1: {//1.增加数据
String str = lp.inputData();
lp.addData(str);
System.out.println("增加数据成功.");
timeOut(1);
}break;
case 2: {//2.查找数据
long find = 0;
***隐藏网址***

JAVA：编写一个学生成绩管理系统学生的属性包括学号、姓名、年龄等

class Student{
String name;
String id;
int age;
Couse course;
}
class Course{
String coursename;
float pscourse;
float qzcourse;
float sxcourse;
float qmcourse;
float zpcourse;
}
这个要写好长时间的，定义几个类；然后实现具体的功能。用数组或者集合来存储学生信息还有成绩信息，最后定义一个测试类。你可以找我私聊，1368270359qq

急求一个Java编写的学生成绩管理系统，数据库最好能是SqlServer先在这儿谢谢大家啦！

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.lang.*;
public class Students extends Applet implements ActionListener
{
Vector StuInf=new Vector();
StudentInf SI;
String xm;
String bj;
int i,j,xh,cj;
static int mid;
Label prompt1=new Label("学生成绩管理系统");
Label prompt2=new Label(" 用户:");
Label prompt3=new Label(" 密码:");
Label prompt4=new Label(" 班级:");
Label prompt5=new Label(" 成绩:");
TextField input1=new TextField(8);
TextField input2=new TextField(8);
TextField input3=new TextField(8);
TextField input4=new TextField(8);
Button btn1=new Button("登录");
Button btn2=new Button("增加");
Button btn3=new Button("修改");
Button btn4=new Button("删除");

public void init()
{
setLayout(new GridLayout(6,3));
add(new Label());
add(prompt1);
add(new Label());
add(prompt2);
add(input1);
add(new Label());
add(prompt3);
add(input2);
add(btn1);
add(prompt4);
add(input3);
add(new Label());
add(prompt5);
add(input4);
add(new Label());
add(btn2);
add(btn3);
add(btn4);
prompt4.setVisible(false);
prompt5.setVisible(false);
input3.setVisible(false);
input4.setVisible(false);
btn2.setVisible(false);
btn3.setVisible(false);
btn4.setVisible(false);
btn1.addActionListener(this);
btn2.addActionListener(this);
btn3.addActionListener(this);
btn4.addActionListener(this);
}
public void actionPerformed(ActionEvent e)
{
if(e.getActionCommand()=="登录")
{
String a,b;
a=input1.getText();
b=input2.getText();
input1.setText("");
if((a.equals("12")==true)&&(b.equals("12")==true))
{
prompt2.setText(" 姓名:");
prompt3.setText(" 学号:");
prompt4.setVisible(true);
prompt5.setVisible(true);
input3.setVisible(true);
input4.setVisible(true);
btn2.setVisible(true);
btn3.setVisible(true);
btn4.setVisible(true);
btn3.setEnabled(false);
btn4.setEnabled(false);
btn1.setLabel("查询");
input1.setText("登录成功");
input1.selectAll();
}
else
input2.setText("用户名或密码错");
}
if(e.getActionCommand()=="增加")
{
boolean scucss=true;
try
{
XingMing();
}
catch(EmptyException as)
{
input1.setText("姓名不能为空");
scucss=false;
}
try
{
xh=Integer.parseInt(input2.getText());
}
catch(NumberFormatException m)
{
input2.setText("学号为空或格式错");
scucss=false;
}
bj=input3.getText();
try
{
ChengJi();
}
catch(EmptyException as)
{
cj=-1;
}
catch(OverException dd)
{
input4.setText("应在0-100间");
scucss=false;
}
catch(NumberFormatException cm)
{
input4.setText("成绩应为数据");
scucss=false;
}
if(scucss==true)
{
SI=new StudentInf(xm,xh,bj,cj);
Insert(SI);
}
}
if(e.getActionCommand()=="修改")
{
xm=input1.getText();
xh=Integer.parseInt(input2.getText());
bj=input3.getText();
cj=Integer.parseInt(input4.getText());
SI=new StudentInf(xm,xh,bj,cj);
StuInf.setElementAt(SI, mid);
btn3.setEnabled(false);
}
if(e.getActionCommand()=="删除")
{
StuInf.removeElementAt(mid);
btn4.setEnabled(false);
input1.setText("删除成功");
input2.setText("");
input3.setText("");
input4.setText("");
}
if(e.getActionCommand()=="查询")
{
boolean right=true;
try
{
xh=Integer.parseInt(input2.getText());
}
catch(NumberFormatException m)
{
input2.setText("学号为空或格式错");
right=false;
}
if(right==true)
{
search(xh);
btn3.setEnabled(true);
btn4.setEnabled(true);
}
}

}
//查找方法
public void search(int k)
{
boolean exist=false;
int low=0;
int high=StuInf.size()-1;
while(low《=high)
{
mid=(high+low)/2;
StudentInf a1=(StudentInf) StuInf.elementAt(mid);
if(a1.getStuNo()==k)
{
SI=(StudentInf) StuInf.elementAt(mid);
String x = String.valueOf(SI.getStuNo());
exist=true;
input1.setText(SI.getname());
input1.selectAll();
input2.setText("0"+x);
input3.setText(SI.getClassNo());
if(SI.getLevel()==-1)
input4.setText("未参加考试");
else
{
String y = String.valueOf(SI.getLevel());
input4.setText(y);
}
break;
}
else if(a1.getStuNo()《k)
low=mid+1;
else
high=mid-1;
}
if(exist==false)
{
input1.setText("无此学号学生信息");
input1.selectAll();
}
}
//添加方法
public void Insert(StudentInf q)
{
int i=0;

if(StuInf.isEmpty()==true)
{
StuInf.addElement(q);
input1.setText("");
input2.setText("");
input3.setText("");
input4.setText("");
}
else
{
StudentInf xh;
xh=(StudentInf) StuInf.firstElement();
while(xh.getStuNo()《q.getStuNo())
{
i++;
if(i《StuInf.size())
xh=(StudentInf) StuInf.elementAt(i);
else
break;
}
if(xh.getStuNo()==q.getStuNo())
{
input2.setText("此学生信息已存在");
input2.requestFocus();
input2.selectAll();
}
else
{
StuInf.insertElementAt(q,i);
input1.setText("");
input2.setText("");
input3.setText("");
input4.setText("");
}
}
}

//异常类
class OverException extends Exception
{
String over;
}
class EmptyException extends Exception
{
String empty;
}
void XingMing() throws EmptyException
{
if((input1.getText()).equals(""))
throw (new EmptyException());
else
xm=input1.getText();
}
void ChengJi() throws OverException,EmptyException
{
if((input4.getText()).equals(""))
throw(new EmptyException());
else
cj=Integer.parseInt(input4.getText());
if(cj《0||cj》100)
throw (new OverException());
}

//学生信息类
public class StudentInf
{
private String name;
private int StuNo;
private String ClassNo;
private int Level;
StudentInf(String xingming,int xuehao,String banji,int chengji)
{
name=xingming;
StuNo=xuehao;
ClassNo=banji;
Level=chengji;
}
public int getStuNo()
{
return StuNo;
}
public String getname()
{
return name;
}
public String getClassNo()
{
return ClassNo;
}
public int getLevel()
{
return Level;
}
}
}

java编写学生成绩管理系统

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class Admin {
public static void main(String args) throws IOException, ClassNotFoundException {
Scanner in = new Scanner(System.in);
int studentNum = 5;
List《Student》 result = new ArrayList《Student》();
for (int i = 0; i 《 studentNum; i++) {
Student bean = new Student();
System.out.print("输入第" + (i + 1) + "个学生学号:");
bean.setNo(in.next());
System.out.print("输入第" + (i + 1) + "个学生姓名:");
bean.setName(in.next());
System.out.print("输入第" + (i + 1) + "个学生数学成绩:");
bean.setShuxue(in.nextDouble());
System.out.print("输入第" + (i + 1) + "个学生语文成绩:");
bean.setYuwen(in.nextDouble());
result.add(bean);
}
while (true) {
System.out.println("1.保存到文件;2.总成绩;3.平均成绩;4.不及格比例;5.及格比例;6,优良比例;0.退出.");
int i = in.nextInt();
if (i == 0) {
System.exit(0);
}
if (i == 1) {
save(result);
}
if (i == 2) {
for (int j = 0; j 《 result.size(); j++) {
Student s = result.get(j);
System.out.println("学生" + s.getName() + "的总成绩是:" + s.all());
}
}
if (i == 3) {
int jigeSum = 0;
for (int j = 0; j 《 result.size(); j++) {
Student s = result.get(j);
if (!s.isJige()) {
jigeSum++;
}
}
System.out.println("不及格比例:" + jigeSum + "/" + result.size());
}
if (i == 4) {
// 篇幅受限,自行开发
}
if (i == 5) {
// 篇幅受限,自行开发
}
}
}
private static void save(List result) throws IOException {
FileOutputStream fs = new FileOutputStream("d:/a.txt");
ObjectOutputStream os = new ObjectOutputStream(fs);
os.writeObject(result);
os.flush();
os.close();
fs.close();
}
}
class Student implements Serializable {
private String no;
private String name;
private double shuxue;
private double yuwen;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public double getShuxue() {
return shuxue;
}
public void setShuxue(double shuxue) {
this.shuxue = shuxue;
}
public double getYuwen() {
return yuwen;
}
public void setYuwen(double yuwen) {
this.yuwen = yuwen;
}
public double all() {
return shuxue + yuwen;
}
public double avg() {
return all() / 2;
}
public boolean isJige() {
return avg() 》 60;
}
}