studentscore.java

StudentManage是一个学生成绩管理系统

package edu.hit.software;

import java.awt.*;
import java.io.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;

public class StudentScore
{
    public static void main(String[] args)
    {
    	ManageScoreFrame frame=new ManageScoreFrame();
        Toolkit kit=Toolkit.getDefaultToolkit();
        Dimension screenSize=kit.getScreenSize();
        int screenWidth=screenSize.width;
        int screenHeigth=screenSize.height;
        int frameWidth=frame.getWidth();
        int frameHeigth=frame.getHeight();
        frame.setLocation((screenWidth-frameWidth)/2, (screenHeigth-frameHeigth)/2);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
        frame.setResizable(false);
    }
}

class ManageScoreFrame extends JFrame
{
	private static final long serialVersionUID = 1L;

	public ManageScoreFrame()
	{
		setTitle("ManageScore2.0");
		ManageScorePanel panel=new ManageScorePanel();
		add(panel);
		pack();
	}
}

class ManageScorePanel extends JPanel
{
	private static final long serialVersionUID = 1L;
	public ManageScorePanel()
	{
		setLayout(new BorderLayout());
		
		JLabel InNameLabel=new JLabel("姓名");
		JLabel InCourseLabel=new JLabel("课程名");
		JLabel InScoreLabel=new JLabel("分数");
		JLabel SearchNameLabel=new JLabel("姓名");
		JLabel SearchCourseLabel=new JLabel("课程名");		
		InNameField=new JTextField(5);
		InCourseField=new JTextField(5);
		InScoreField=new JTextField(5);
		SearchNameField=new JTextField(5);
		SearchCourseField=new JTextField(5);
		InputButton=new JButton("录入");
		SearchButton=new JButton("查找");
		TextArea=new JTextArea(10,35);
		
		InputButton.addActionListener(new InputAction());
		SearchButton.addActionListener(new SearchAction());
		TextArea.setEditable(false);
				
		InputPanel=new JPanel(new FlowLayout(FlowLayout.LEFT));
		InputPanel.add(InputButton);
		InputPanel.add(InNameLabel);
		InputPanel.add(InNameField);
		InputPanel.add(InCourseLabel);
		InputPanel.add(InCourseField);
		InputPanel.add(InScoreLabel);
		InputPanel.add(InScoreField);
		SearchPanel=new JPanel(new FlowLayout(FlowLayout.LEFT));
		SearchPanel.add(SearchButton);
		SearchPanel.add(SearchNameLabel);
		SearchPanel.add(SearchNameField);
		SearchPanel.add(SearchCourseLabel);
		SearchPanel.add(SearchCourseField);
		TextPanel=new JPanel();
		TextPanel.add(TextArea);
		
		add(InputPanel,BorderLayout.NORTH);
		add(SearchPanel,BorderLayout.CENTER);
		add(TextPanel,BorderLayout.SOUTH);
	}
	public class InputAction implements ActionListener
	{
		public void actionPerformed(ActionEvent event)
		{
			try{
				String s1,s2,s3;
				s1=InNameField.getText();
				s2=InCourseField.getText();
				s3=InScoreField.getText();
				if(s1.equals(""))throw new IOException("请输入学生姓名");
				if(s2.equals(""))throw new IOException("请输入课程名");
				if(s3.equals(""))throw new IOException("请输入分数");
				int score=Integer.parseInt(s3);
				if(score<0||score>100)throw new IOException("请输入0~100的分数");
				data=new Data(s1,s2,score);
				database.addData(data);
				InNameField.setText("");
				InCourseField.setText("");
				InScoreField.setText("");
				TextArea.setText("	姓名	课程名	得分\n" +
						"             －－－－－－－－－－－－－－－－－－－－－－－－－\n"
						+"	"+s1+"	"+s2+"	"+score+"\n录入成功");	
			}
			catch(IOException e)
			{
				TextArea.setText("\n"+e.getMessage());
			}
			catch(NumberFormatException e)
			{
				TextArea.setText("\n"+"输入分数时请用数字");
			}
		}
	}
	public class SearchAction implements ActionListener
	{
		public void actionPerformed(ActionEvent event)
		{
			String student,course,result="";
			student=SearchNameField.getText();
			course=SearchCourseField.getText();
			try
			{
				if(student.equals("")&&course.equals(""))
					throw new IOException("请输入查询的条件");
				if(student.equals("")&&!course.equals(""))
					result=database.searchData_Course(course);
				if(!student.equals("")&&course.equals(""))
					result=database.searchData_Student(student);
				if(!student.equals("")&&!course.equals(""))
					result=database.searchData_Both(student,course);
				TextArea.setText("	姓名	课程名	得分\n" +
						"             －－－－－－－－－－－－－－－－－－－－－－－－－\n"
						+result);
				SearchNameField.setText("");
				SearchCourseField.setText("");
			}
			catch(IOException e)
			{
				TextArea.setText("\n"+e.getMessage());
			}
		}
	}	
	private JPanel InputPanel;
	private JPanel SearchPanel;
	private JPanel TextPanel;
	private JTextField InNameField; 
	private JTextField InCourseField; 
	private JTextField InScoreField;
	private JTextField SearchNameField;
	private JTextField SearchCourseField;
	private JButton InputButton;
	private JButton SearchButton;
	private JTextArea TextArea;
	private Data data;
	private DataBase database=new DataBase();
}
class DataBase
{
	public DataBase()
	{
	}
	public void addData(Data d) throws IOException
	{
		if(!searchStudent(d.getStudentName()))throw new IOException("学生不存在");
		if(!searchCourse(d.getCourseName()))throw new IOException("课程不存在");
		data=new ArrayList<Data>(100);
		try
		{
			BufferedReader in=new BufferedReader(new FileReader("data.dat"));
			String line;
			while((line=in.readLine())!=null)
			{
				StringTokenizer t = new StringTokenizer(line, "|");
				String s1=t.nextToken();
				String s2=t.nextToken();
				String s3=t.nextToken();				
				data.add(new Data(s1,s2,Integer.parseInt(s3)));
			}
			in.close();
		}
		catch(IOException e)
	    {
	      	e.printStackTrace();
	    }
		boolean isExist=false;
		int i=0;
		for(Data e:data)
		{
			i++;
			if(e.getStudentName().equals(d.getStudentName())
			   &&e.getCourseName().equals(d.getCourseName()))
			{
				e.setScore(d.getScore());
				isExist=true;
			}				
		}
		System.out.println(isExist+" i="+i);
		if(!isExist)data.add(d);
		try
		{
			PrintWriter out = new PrintWriter(new FileWriter("data.dat"));
			for(Data e:data)
			{
				out.append(e.getStudentName()+"|"
						+e.getCourseName()+"|"
						+e.getScore()+"\n");
			}			
			out.close();
		}
		catch(IOException e)
	    {
	      	e.printStackTrace();
	    }
	}
	public boolean searchStudent(String s)
	{
		boolean judge=false;
		try
		{
			BufferedReader in=new BufferedReader(new FileReader("student.dat"));
			String line;
			while((line=in.readLine())!=null)
			{
				if(line.equals(s))
					judge=true;
			}
			in.close();
		}
		catch(IOException e)
	      {
	      	e.printStackTrace();
	      }
		return judge;
	}
	public boolean searchCourse(String c)
	{
		boolean judge=false;
		try
		{
			BufferedReader in=new BufferedReader(new FileReader("course.dat"));
			String line;
			while((line=in.readLine())!=null)
			{
				if(line.equals(c))
					judge=true;
			}
			in.close();
		}
		catch(IOException e)
	    {
	      	e.printStackTrace();
	    }
		return judge;
	}
	public String searchData_Student(String s) throws IOException
	{
		String result="";
		if(!searchStudent(s))throw new IOException("学生不存在");
		try
		{
			BufferedReader in=new BufferedReader(new FileReader("data.dat"));
			String line;
			while((line=in.readLine())!=null)
			{
				StringTokenizer t = new StringTokenizer(line, "|");
				String s1=t.nextToken();
				String s2=t.nextToken();
				String s3=t.nextToken();
				if(s1.equals(s))
				{
					result+="	"+s+"	"+s2+"	"+s3+"\n";
				}
			}
			in.close();
		}
		catch(IOException e)
	    {
	      	e.printStackTrace();
	    }
		return result;
	}
	public String searchData_Course(String c) throws IOException
	{
		String result="";
		if(!searchCourse(c))throw new IOException("课程不存在");
		try
		{
			BufferedReader in=new BufferedReader(new FileReader("data.dat"));
			String line;
			while((line=in.readLine())!=null)
			{
				StringTokenizer t = new StringTokenizer(line, "|");
				String s1=t.nextToken();
				String s2=t.nextToken();
				String s3=t.nextToken();
				if(s2.equals(c))
				{
					result+="	"+s1+"	"+c+"	"+s3+"\n";
				}
			}
			in.close();
		}
		catch(IOException e)
	    {
	      	e.printStackTrace();
	    }
		return result;
	}
	public String searchData_Both(String s,String c) throws IOException
	{
		if(!searchStudent(s))throw new IOException("学生不存在");
		if(!searchCourse(c))throw new IOException("课程不存在");
		String result="";
		try
		{
			BufferedReader in=new BufferedReader(new FileReader("data.dat"));
			String line;
			while((line=in.readLine())!=null)
			{
				StringTokenizer t = new StringTokenizer(line, "|");
				String s1=t.nextToken();
				String s2=t.nextToken();
				String s3=t.nextToken();
				if(s1.equals(s)&&s2.equals(c))
				{
					result+="	"+s+"	"+c+"	"+s3+"\n";
				}
			}
			in.close();
		}
		catch(IOException e)
	    {
	      	e.printStackTrace();
	    }
		return result;
	}
	private ArrayList<Data> data;
}
class Data
{
	public Data(String student,String course,int score)
	{
		studentName=student;
		courseName=course;
		this.score=score;
	}
	public String getStudentName()
	{
		return studentName;
	}
	public String getCourseName()
	{
		return courseName;
	}
	public int getScore()
	{
		return score;
	}
	public void setScore(int s)
	{
		score=s;
	}
	private String studentName;
	private String courseName;
	private int score;
}
class Student
{
	public Student(String name)
	{
		this.name=name;
	}
	public String getName()
	{
		return name;
	}
	private String name;
}
class Course
{
	public Course(String name)
	{
		this.name=name;
	}
	public String getName()
	{
		return name;
	}
	private String name;
}