bussinessservices.java

在线的java web 做的 学生选课系统。自己做的。大家可以一起讨论。

package edu.sist200.services;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

import javax.swing.JOptionPane;

import edu.sist200.model.Course;
import edu.sist200.model.SC;
import edu.sist200.model.Student;
import edu.test.demo.FileManage;
import gui.YXKC;


public class BussinessServices {
 
	Scanner scan=new Scanner(System.in);
	
public  List addStu(Student stu)
 {
		List l=new ArrayList();
		File file = new File("students.txt"); 
		if(file.exists()){
			try {
				l=(List)FileManage.findObject("students.txt");
			} catch (IOException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
		}

		 l.add(stu);

	 try {
		for (int i=0; i < l.size(); i++){
			Student s=(Student)l.get(i);
			System.out.println(s.getSno());
		}
			
		FileManage.addObject(l, "students.txt");
		System.out.println(l.size());
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	
		return l;
	
 }

 public  boolean stulogin(Student s)
 {
	 boolean f=false;
	 int i = 0;
	 List l=new ArrayList();
	 try {
		l=(List)FileManage.findObject("students.txt");
	} catch (IOException e1) {
		// TODO Auto-generated catch block
		e1.printStackTrace();
	}
	 Student stu = null;
	 String sno=s.getSno();
	 String pwd=s.getPassword();
	 for (; i < l.size(); i++)
		{
		 stu = (Student) l.get(i);
		 if(stu.getSno().equals(sno)&&stu.getPassword().equals(pwd)){
			 f=true;
			 break;
			}
		}

	 return f;
		 
	 }	 
 
 public boolean chooseCou(Student stu,Course c){
	 File fileC = new File("courses.txt");
	 boolean flag=false;
	if(fileC.exists()){
		List scl=new ArrayList();
		File file = new File("scs.txt");
		if(file.exists()){
			 try {
				scl=(List)FileManage.findObject("scs.txt");
			} catch (IOException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
		}
		 boolean f=true;
		 List cl=null;
			try {
				cl = (List)FileManage.findObject("courses.txt");
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		 queryCou();

			SC sc=new SC();
			String cno=c.getCno();
			int i = 0;
			String ct=c.getCteacher();
			for (; i < cl.size(); i++) {
				Course course = (Course) cl.get(i);
				if(cno.equals(course.getCno())&&ct.equals(course.getCteacher())){

					sc.setCourse(course);
					sc.setStudent(stu);
					scl.add(sc);
					
					System.out.println("选课成功！！！！");
					flag=true;
					break;
				}
				}	
				if(i==cl.size()){
						System.out.println("该课程不存在！！！");
				}

			try {
				FileManage.addObject(scl, "scs.txt");
				return flag;
				
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
	}else{
		System.out.println("目前没有课程可以选择！");
	}
	return flag;
}



public List  addCourse(Course course)
{
	
	List cl=new ArrayList();
	File file = new File("courses.txt");
	if(file.exists()){
		try {
			cl=(List)FileManage.findObject("courses.txt");
		} catch (IOException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
	}

		 cl.add(course);

		try {
			FileManage.addObject(cl, "courses.txt");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			JOptionPane.showMessageDialog(null,"添加失败！");
		}
		return cl;	

}
public List queryCou(){
	
	List cl=null;
	File file = new File("courses.txt");
	if(file.exists()){
		try {
			cl = (List)FileManage.findObject("courses.txt");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		return cl;
	}else
	{
		
		return cl;
		
	}
}
public List queryStuCou(Student stu){
	List scl=null;
	List rs=new ArrayList();;
	int j=0;
	File file = new File("scs.txt");
	if(file.exists()){
		try {
			scl = (List)FileManage.findObject("scs.txt");
			int t=1;
			for (int i = 0; i < scl.size(); i++) {
				SC sc=(SC)scl.get(i);
				Student s=sc.getStudent();
				if(stu.getSno().equals(s.getSno())){
						Course course=sc.getCourse();
						
						rs.add(course);
						System.out.println(course.getCno());
						j=1;
				}
			}
			if(j==0){
				JOptionPane.showMessageDialog(null, "该学生没有选课！！请选您要选的课程：");
			}
			
			return rs;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}else{
		JOptionPane.showMessageDialog(null, "该学生没有选课！！请选您要选的课程：");
	}

	return rs;
}
public void student(){
	boolean flag=true;
	 while(flag){
		 System.out.println("学生注册请输入1：	");
	 	 System.out.println("学生选课请输入2：	");
	 	 System.out.println("退出请输入3：	");
	 	 switch(scan.nextInt()){
	 	 case 1:
	 		//addStu();break;
	 	 case 2:
	 		//stulogin();
	 		break;
	 	 case 3:
	 	 	flag=false;
	 	    System.out.println("欢迎使用");break;
	 	 	default:
	 	 		System.out.println("操作不存在！！！");
	 	 }
	 }
}

public static void main(String[] args) {
	// TODO Auto-generated method stub
	BussinessServices s=new BussinessServices();
	//s.addStu();
	//s.addCourse();
	//s.stulogin();
	//s.adminlogin();
	//s.queryCou();
	//s.addStu();
	//s.stulogin();
}


}