java学生管理系统

按照老师的要求，建立了一个zuoye1的包，然后在包内建立两个类。
一个类用来保存学生信息，另一个类用来实现方法。
package zuoye1;

public class ScoreInfore {

    private String stunumber;//8位学号
    private String name;
    private double mathematicsscore;//4学分
    private double englishscor;//3学分
    private double networkscore;//计算机网络成绩4学分
    private double databasescore;//数据库成绩3学分
    private double softwarescore;//软工成绩2学分
    
    public ScoreInfore(String str1,String str2,double a,double b,double c,double d,double e) {
        this.stunumber=str1;
        this.name=str2;
        this.mathematicsscore=a;
        this.englishscor=b;
        this.networkscore=c;
        this.databasescore=d;
        this.softwarescore=e;
    }
    public String getnum() {
        return stunumber;
    }
    public void setnum(String number)
    {
        stunumber=number;
    }
    
    public String getname()
    {
        return name;
    }
    public void setname(String stuname)
    {
        name=stuname;
    }
    
    public void setmascore(double ms) {
        mathematicsscore=ms;
    }
    public double getmascore()
    {
        return mathematicsscore;
    }
    public void setenglishscore(double es) {
        englishscor=es;
    }
    public double getenglishscore() {
        return englishscor;
    }
    
    public double getdatabasescore() {
        return databasescore;
    }
    
    public void setdatabasescore(double ds) {
        databasescore=ds;
    }
    
    public double getsoftwarescore() {
        return softwarescore;
    }
    public void setsoftwarescore(double ss) {
        softwarescore=ss;
    }
    
    public double getnetworkscore() {
        return networkscore;
    }
    public void setnetworkscore(double ns) {
        networkscore=ns;
    }
}


ScoreManagement类：

package zuoye1;
import java.io.IOException;
import java.util.Scanner;
public class ScoreManagement {
	ScoreManagement s=new ScoreManagement();
	//ScoreInfore[] ss= {new ScoreInfore("20183606","yan",0,0,0,0,0),new ScoreInfore("20183607","mei",0,0,0,0,0),new ScoreInfore("20183608","fan",0,0,0,0,0)};
	//ss[1]=ScoreInfore("20183606","小晏",0,0,0,0,0);
	
	public static void main(String[] args) throws IOException {
		menu();
	}
	static ScoreInfore[] ss= {new ScoreInfore("20183606","yan",0,0,0,0,0),new ScoreInfore("20183607","mei",0,0,0,0,0),new ScoreInfore("20183608","fan",0,0,0,0,0)};
	
  static void menu()throws IOException//定义菜单函数
	{
		System.out.println("*******************************");
		System.out.println("        石家庄铁道大学软件工程系                   ");
		System.out.println("        学生学籍管理系统2019年版                ");
		System.out.println("*******************************");
		System.out.println("           1.学生考试成绩录入                   ");
		System.out.println("           2.学生考试 成绩修改                  ");
		System.out.println("           3.计算学生成绩绩点                   ");
		System.out.println("           4.退出学籍管理系统                   ");
		System.out.println("*******************************");
	    Scanner sc=new Scanner(System.in);
		int a=sc.nextInt();
		switch(a) {
		case 1:add();menu();break;
		case 2:change();menu();break;
		case 3:jisuan();menu();break;
		case 4:tuichu();break;
	
		}
		
	}
		
	 //成绩录入
	static void add() throws IOException {
		System.out.println("***********************************");
		System.out.println("石家庄铁道大学软件工程系学生信息学籍管理系统2019版");
		System.out.println("            学生考试成绩录入                      ");
		System.out.println("***********************************");
		System.out.println("            请输入学生学号：                       ");
		System.out.println("***********************************");
		Scanner sc=new Scanner(System.in);
		String num=sc.nextLine();
		int flag = 1;
		for(int i=0;i<3;i++)
		{
			if(num.equals(ss[i].getnum())) {
			 flag=1;
			System.out.println(ss[i].getnum());
			System.out.println(ss[i].getname());
			System.out.println("请输入数学成绩：");
			double chengji11=sc.nextDouble();
			
			System.out.println("请输入英语成绩：");
			double chengji21=sc.nextDouble();
			
			System.out.println("请输入计算机网络成绩：");
			double chengji31=sc.nextDouble();
			
			System.out.println("请输入数据库成绩：");
			double chengji41=sc.nextDouble();
			
			System.out.println("请输入软工成绩：");
			double chengji51=sc.nextDouble();
			
			System.out.println("输入完毕，是否保存？Y/N");
		    Scanner u=new Scanner(System.in);
		    String  r=u.nextLine();
		    switch(r) {
		    case "Y":ss[i].setmascore(chengji11);
		    		 ss[i].setenglishscore(chengji21);
		    		 ss[i].setnetworkscore(chengji31); 
		    		 ss[i].setdatabasescore(chengji41);
		    		 ss[i].setsoftwarescore(chengji51);
		    		 break;
		    case "N":add();break;
		    }
		    break;
			}
			else flag=0;
		   }
		if(flag==0)
		{
			System.out.println("输入错误，请重新输入");
			menu();
		}
					
	}
		   
	
	//成绩修改
	static void change() throws IOException
	{
		System.out.println("**********************************");
		System.out.println("石家庄铁道大学软件工程系学生信息学籍管理系统2019版");
		System.out.println("             学生考试成绩修改界面                        ");
		System.out.println("***********************************");
		System.out.println("            请输入八位学生学号：                       ");
		System.out.println("***********************************");
		Scanner sc=new Scanner(System.in);
		String num=sc.nextLine();//输入学号并进行判断
		int flag = 1;
		for(int i=0;i<3;i++) {
			if(num.equals(ss[i].getnum())){
				flag=1;
				System.out.println(ss[i].getnum()+"\n"+ss[i].getname()+"\n"+ss[i].getmascore()+"\n"+ss[i].getenglishscore()+"\n"+ss[i].getnetworkscore()+"\n"+ss[i].getdatabasescore());
				System.out.println(ss[i].getsoftwarescore());
				System.out.println("请输入要修改的学科代号：");
				System.out.println("1.数学");
				System.out.println("2.英语");
				System.out.println("3.计算机网络成绩");
				System.out.println("4.数据库成绩");
				System.out.println("5.软工成绩");
				int a=sc.nextInt();//输入要修改的学科代号
				switch(a) {
				 	case 1: System.out.println("请输入要修改的数学成绩");double q=sc.nextDouble();ss[i].setmascore(q);break;
				 	case 2:System.out.println("请输入要修改的英语成绩");double w=sc.nextDouble();ss[i].setenglishscore(w);break;
				 	case 3:System.out.println("请输入要修改的计算机网络成绩");double e=sc.nextDouble();ss[i].setnetworkscore(e);break;
				 	case 4:System.out.println("请输入要修改的数据库成绩");double r=sc.nextDouble();ss[i].setdatabasescore(r);break;
				 	case 5:System.out.println("请输入要修改的软工成绩");double t=sc.nextDouble();ss[i].setsoftwarescore(t);break;
				}
			}
			else flag=0;
		}
		if(flag==0) {
			{
				System.out.println("输入错误");
			    menu();
			    }
		}
			
	}
	
	
	//成绩绩点
	static void jisuan() {
		System.out.println("**********************************");
		System.out.println("石家庄铁道大学软件工程系学生信息学籍管理系统2019版");
		System.out.println("            学生考试成绩绩点计算界面                      ");
		System.out.println("***********************************");
		System.out.println("            请输入学生学号：                       ");
		System.out.println("***********************************");
		Scanner sc=new Scanner(System.in);
		String num=sc.nextLine();
		int flag=0;
		for(int i=0;i<3;i++) {
			if(num.equals(ss[i].getnum())) {
				flag=1;
				double q=0;
				q=judge(ss[i].getmascore())*4+judge(ss[i].getenglishscore())*3+judge(ss[i].getnetworkscore())*4+judge(ss[i].getdatabasescore())*3+judge(ss[i].getsoftwarescore())*2;
				double w=q/16;
			   
				System.out.println("学号："+ss[i].getnum());
				System.out.println("姓名："+ss[i].getname());
				System.out.println("数学的绩点为："+judge(ss[i].getmascore()));
				System.out.println("英语的绩点为："+judge(ss[i].getenglishscore()));
				System.out.println("计算机网络成绩的绩点为："+judge(ss[i].getnetworkscore()));
				System.out.println("数据库成绩绩点为："+judge(ss[i].getdatabasescore()));
				System.out.println("软工成绩绩点为："+judge(ss[i].getsoftwarescore()));
				System.out.println(String.format("%.2f", w));
			}
		}
	}
	
	//判断学分绩点的函数
	static double judge(double ww) {
		double jidian = 0;
		if(ww<60) jidian=0;
		if(ww>=60&&ww<63.9) jidian=1.0;
		if(ww>=64&&ww<65.9) jidian=1.5;
		if(ww>=66&&ww<67.9) jidian=1.7;
		if(ww>=68&&ww<71.9) jidian=2.0;
		if(ww>=72&&ww<74.9) jidian=2.3;
		if(ww>=75&&ww<77.9) jidian=2.7;
		if(ww>=78&&ww<81.9) jidian=3.0;
		if(ww>=82&&ww<84.9) jidian=3.3;
		if(ww>=85&&ww<89.9)	jidian=3.7;
		if(ww>=90)          jidian=4.0;
		return jidian;
	}
	//退出界面
  static void tuichu() {
		System.out.println("***********************************");
		System.out.println("石家庄铁道大学软件工程系学生信息学籍管理系统2019版");
		System.out.println("            制作人：张子一                   ");
		System.out.println("***********************************");
	}
}
程序运行结果：

 

 

 

 

 

在编程过程中，我遇到了很多困难，刚开始都没弄清楚两个类的结构。对各个方法的过程也没有头绪。
在编程过程中，对Java的语法有了一个大概的认识，认识到了良好的编程习惯的重要性。学会了对象数组是我这次最大的收获。我还缺少编程经验，以后要加强练习。