Java实现根据不同字段集中或分散综合分班

Question

如今我有学生数据集合List,班级集合List，bjxx有最大人数字段bjzdrs，如今我需要将这些学生分入班级，有分班规则集合List 实体类FbGz为

public class FbGz { private String id; //规则类型(1-学生姓名 2-学生成绩 3-学生籍贯 4-学生年龄) private String gzlx; //规则方式（1-集中 2-分散） private String gzfs; }其中gzlx有4种，根据gzlx可以选择学生该字段为集中分班还是分散分班，如何根据规则集合实现综合分班，分班规则由集合数据顺序由强到弱

Answer 1

根据规则集合实现综合分班，可以按照以下步骤进行操作：

1. 遍历班级集合List，获取每个班级的最大人数字段bjzdrs。
2. 根据规则集合List的顺序，依次判断每个规则的规则类型gzlx。
3. 根据规则类型选择相应的分班方式gzfs，如果是集中分班方式，则将学生按照该规则进行集中分班；如果是分散分班方式，则将学生按照该规则进行分散分班。
4. 将学生分入班级，分班的具体逻辑可以根据不同的规则类型进行编写，比如按学生姓名进行排序后分班，按学生成绩进行排序后分班，按学生籍贯进行排序后分班，或者按学生年龄进行排序后分班。
5. 每次分班操作后，要更新班级的最大人数字段bjzdrs，更新方式为当前最大人数减去已分班的学生人数。
6. 重复步骤2到步骤5，直到分班规则集合List中的所有规则都被执行完毕，或者班级的最大人数字段bjzdrs已经达到或超过了学生的总人数。

通过以上步骤，可以根据规则集合实现综合分班，并根据规则的强弱顺序进行分班操作。

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        // 创建学生数据集合
        List<Student> studentList = new ArrayList<>();
        studentList.add(new Student("张三", 80, "北京", 18));
        studentList.add(new Student("李四", 75, "上海", 17));
        studentList.add(new Student("王五", 90, "广州", 19));
        studentList.add(new Student("赵六", 85, "北京", 16));
        studentList.add(new Student("刘七", 95, "上海", 17));
        
        // 创建班级集合
        List<Classroom> classroomList = new ArrayList<>();
        classroomList.add(new Classroom("一班", 30));
        classroomList.add(new Classroom("二班", 35));
        classroomList.add(new Classroom("三班", 30));
        
        // 创建分班规则集合
        List<FbGz> ruleList = new ArrayList<>();
        ruleList.add(new FbGz("1", "1", "1"));
        ruleList.add(new FbGz("2", "2", "1"));
        ruleList.add(new FbGz("3", "1", "2"));
        ruleList.add(new FbGz("4", "2", "2"));
        
        // 根据规则集合实现综合分班
        for (FbGz rule : ruleList) {
            List<Student> selectedStudents = selectStudentsByRule(studentList, rule);
            distributeStudentsToClassrooms(selectedStudents, classroomList, rule.getGzfs());
        }
        
        // 输出分班结果
        for (Classroom classroom : classroomList) {
            System.out.println(classroom);
        }
    }
    
    // 根据规则选择学生
    private static List<Student> selectStudentsByRule(List<Student> students, FbGz rule) {
        List<Student> selectedStudents = new ArrayList<>();
        switch (rule.getGzlx()) {
            case "1": // 学生姓名
                selectedStudents = selectStudentsByStudentName(students, rule.getGzfs());
                break;
            case "2": // 学生成绩
                selectedStudents = selectStudentsByStudentScore(students, rule.getGzfs());
                break;
            case "3": // 学生籍贯
                selectedStudents = selectStudentsByStudentNativePlace(students, rule.getGzfs());
                break;
            case "4": // 学生年龄
                selectedStudents = selectStudentsByStudentAge(students, rule.getGzfs());
                break;
        }
        return selectedStudents;
    }
    
    // 按学生姓名选择学生
    private static List<Student> selectStudentsByStudentName(List<Student> students, String rule) {
        List<Student> selectedStudents = new ArrayList<>();
        for (Student student : students) {
            if (rule.equals("1")) { // 集中分班，按姓名字母顺序分配
                if (student.getName().charAt(0) <= '张') {
                    selectedStudents.add(student);
                }
            } else if (rule.equals("2")) { // 分散分班，按姓名字母逆序分配
                if (student.getName().charAt(0) > '张') {
                    selectedStudents.add(student);
                }
            }
        }
        return selectedStudents;
    }
    
    // 按学生成绩选择学生
    private static List<Student> selectStudentsByStudentScore(List<Student> students, String rule) {
        List<Student> selectedStudents = new ArrayList<>();
        for (Student student : students) {
            if (rule.equals("1")) { // 集中分班，按成绩从高到低分配
                if (student.getScore() >= 90) {
                    selectedStudents.add(student);
                }
            } else if (rule.equals("2")) { // 分散分班，按成绩从低到高分配
                if (student.getScore() < 90) {
                    selectedStudents.add(student);
                }
            }
        }
        return selectedStudents;
    }
    
    // 按学生籍贯选择学生
    private static List<Student> selectStudentsByStudentNativePlace(List<Student> students, String rule) {
        List<Student> selectedStudents = new ArrayList<>();
        for (Student student : students) {
            if (rule.equals("1")) { // 集中分班，选择北京籍贯的学生
                if (student.getNativePlace().equals("北京")) {
                    selectedStudents.add(student);
                }
            } else if (rule.equals("2")) { // 分散分班，选择非北京籍贯的学生
                if (!student.getNativePlace().equals("北京")) {
                    selectedStudents.add(student);
                }
            }
        }
        return selectedStudents;
    }
    
    // 按学生年龄选择学生
    private static List<Student> selectStudentsByStudentAge(List<Student> students, String rule) {
        List<Student> selectedStudents = new ArrayList<>();
        for (Student student : students) {
            if (rule.equals("1")) { // 集中分班，选择年龄大于等于18岁的学生
                if (student.getAge() >= 18) {
                    selectedStudents.add(student);
                }
            } else if (rule.equals("2")) { // 分散分班，选择年龄小于18岁的学生
                if (student.getAge() < 18) {
                    selectedStudents.add(student);
                }
            }
        }
        return selectedStudents;
    }
    
    // 将学生分配到班级
    private static void distributeStudentsToClassrooms(List<Student> students, List<Classroom> classrooms, String rule) {
        if (rule.equals("1")) { // 集中分班，按班级容量从大到小分配
            students.sort((s1, s2) -> s2.getId().compareTo(s1.getId()));
        } else if (rule.equals("2")) { // 分散分班，按班级容量从小到大分配
            students.sort((s1, s2) -> s1.getId().compareTo(s2.getId()));
        }
        
        int currentClassroomIndex = 0;
        for (Student student : students) {
            Classroom classroom = classrooms.get(currentClassroomIndex);
            if (classroom.getStudents().size() < classroom.getMaxCapacity()) {
                classroom.addStudent(student);
            } else {
                currentClassroomIndex++;
                if (currentClassroomIndex >= classrooms.size()) {
                    currentClassroomIndex = 0;
                }
                classroom = classrooms.get(currentClassroomIndex);
                classroom.addStudent(student);
            }
        }
    }
}

class Student {
    private String name;
    private int score;
    private String nativePlace;
    private int age;
    
    public Student(String name, int score, String nativePlace, int age) {
        this.name = name;
        this.score = score;
        this.nativePlace = nativePlace;
        this.age = age;
    }
    
    // getter 和 setter 方法
    // ...
}

class Classroom {
    private String name;
    private int maxCapacity;
    private List<Student> students;
    
    public Classroom(String name, int maxCapacity) {
        this.name = name;
        this.maxCapacity = maxCapacity;
        this.students = new ArrayList<>();
    }
    
    public void addStudent(Student student) {
        students.add(student);
    }
    
    public List<Student> getStudents() {
        return students;
    }
    
    // getter 和 setter 方法
    // ...
}

class FbGz {
    private String id;
    private String gzlx;
    private String gzfs;
    
    public FbGz(String id, String gzlx, String gzfs) {
        this.id = id;
        this.gzlx = gzlx;
        this.gzfs = gzfs;
    }
    
    // getter 和 setter 方法
    // ...
}