public static void searchStudentByCollege(Map<String,College>colleges) { Scanner scanner= new Scanner(System.in); System.out.print("请输入要查询的学院名称："); String collegeName = scanner.next(); if (colleges.containsKey(collegeName)) { College college = colleges.get(collegeName); List<ClassInfo> classInCollege = college.getAllClasses(); System.out.println("------ 学生信息 ------"); for (ClassInfo classInfo : classInCollege) { System.out.println(classInfo); List<Student> studentsInCollege = college.getStudentsByCollege(); for (Student student : studentsInCollege) { System.out.println(student); } } System.out.println("----------------------"); } else { System.out.println("未找到该学院的信息！"); } 帮我写出相关的类和构造方法 }

以下是相关的类和构造方法：

1. College类：

public class College {
private String name;
private List<ClassInfo> classes;
private Map<String, Student> students;

public College(String name, List<ClassInfo> classes, Map<String, Student> students) {
this.name = name;
this.classes = classes;
this.students = students;
}

public String getName() {
return name;
}

public List<ClassInfo> getAllClasses() {
return classes;
}

public List<Student> getStudentsByCollege() {
return new ArrayList<>(students.values());
}

public void addStudent(Student student) {
this.students.put(student.getId(), student);
}
}

2. ClassInfo类：

public class ClassInfo {
private String name;
private List<Student> students;

public ClassInfo(String name, List<Student> students) {
this.name = name;
this.students = students;
}

public String getName() {
return name;
}

public List<Student> getStudents() {
return students;
}
}

3. Student类：

public class Student {
private String id;
private String name;
private int age;

public Student(String id, String name, int age) {
this.id = id;
this.name = name;
this.age = age;
}

public String getId() {
return id;
}

public String getName() {
return name;
}

public int getAge() {
return age;
}
}

在调用该方法之前，需要先创建相应的College、ClassInfo和Student对象，并将它们组织成相应的数据结构，然后将这些对象存储在一个Map中。调用该方法时，将这个Map作为参数传入即可。