courseulities.java

一个可以存储和打印成绩单的系统

package org.minjey.cjsjk.report;

import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

import org.minjey.cjsjk.model.Course;
import org.minjey.cjsjk.model.Major;
import org.minjey.cjsjk.model.Student;
import org.minjey.cjsjk.model.StudentCourse;

public class CourseUlities {
	private Major major;
	private Course course;
	private int countpath;
	private int countunpath;
	private double averagescore;
	private String snames;
	private int stulength;
	private List students;
	
	public CourseUlities(Major major, Course course) {
		this.major = major;
		this.course = course;
		stulength = major.getStudents().size();
		initCourse();
	}
	
	public int getGradeLength() {
		return students.size();
	}
	
	public Student getStudent(int i) {
		if(i >= students.size()) {
			return null;
		} else {
			return (Student)students.get(i);
		}
	}
	
	private List<Student> initOrder(Major major) {
		HashMap<Integer, Object> shms = major.getStudents();
		List list = new ArrayList(shms.values());
		MyComparator comp = new MyComparator();
		Collections.sort(list, comp);
		return list;
	}
	
	public String getBkmd() {
		return snames;
	}
	
	public String getAverageScore() {
		return String.valueOf(averagescore);
	}
	
	public int getPathCount() {
		return countpath;
	}
	
	public int getUnpathCount() {
		return countunpath;
	}
	
	public Course getCourse() {
		return course;
	}
	
	public String getStudentPoint(int stuid) {
		StudentCourse sc = (StudentCourse)this.course.getStudentcourses().get(stuid);
		String sgrade = sc.getGrade();
		try{
			float fgrade = Float.parseFloat(sc.getGrade());
			fgrade = (fgrade - 50) / 10;
			if(fgrade < 1) {
				return "0.0";
			} else {
				NumberFormat fm = NumberFormat.getInstance();
				fm.setMaximumFractionDigits(2);
				return fm.format(fgrade);
			}
		} catch (NumberFormatException e){
			if(sgrade.equals("优秀")) {
				return "4.0";
			} else if(sgrade.equals("良好")) {
				return "3.0";
			} else if(sgrade.equals("中等")) {
				return "2.0";
			} else if(sgrade.equals("及格")) {
				return "1.0";
			} else if(sgrade.equals("不及格")){
				return "0.0";
			} else {
				return " ";
			}
		}
		
	}
	
	private void initCourse() {
		HashMap<Integer, Object> students = major.getStudents();
		HashMap<Integer, Object> grades = course.getStudentcourses();
		this.students = new ArrayList();
		Iterator it = students.values().iterator();
		
		Student student = null;
		StudentCourse sc = null;
		double sum = 0;
		int hg = 0;
		String snames = new String();
		
		while(it.hasNext()) {
			student = (Student)it.next();
			sc = (StudentCourse)grades.get(student.getId());
			if(sc == null) {
				snames = snames + student.getName() + ", ";
			} else {
				String grade = sc.getGrade();
				try{
					double fs = Double.valueOf(grade);
					sum = sum + fs;
					if(fs >= 60) {
						hg ++;
					} else {
						snames = snames + student.getName() + ", ";
					}
				} catch (NumberFormatException e){
					if(grade.startsWith("优")) {
						sum = sum + 90;
						hg ++;
					} else if(grade.startsWith("良")) {
						sum = sum + 80;
						hg ++;
					} else if(grade.startsWith("中")) {
						sum = sum + 70;
						hg ++;
					} else if(grade.startsWith("及")) {
						sum = sum + 60;
						hg ++;
					} else if(grade.startsWith("不")) {
						sum = sum + 50;
						snames = snames + student.getName() + ", ";
					} else if(grade.trim().length() == 0){
						snames = snames + student.getName() + ", ";
						continue;
					}
				}
				this.students.add(student);
			}
		}
		averagescore = sum / this.students.size();
		countpath = hg;
		countunpath = this.students.size() - countpath;
		this.snames = snames;
	}
	
	private class MyComparator implements Comparator{
		private int compare(Student s1, Student s2){
			if(s1.getSorder() < s2.getSorder()){
				return -1;
			}else if(s1.getSorder() == s2.getSorder()){
				return 0;
			}else{
				return 1;
			}
		}

		public int compare(Object o1, Object o2) {
			return compare((Student) o1, (Student) o2);
		}
	}

	public int getStulength() {
		return stulength;
	}
}