大数据在教育领域的应用有哪些？请举例说明。

import java.util.HashMap;
import java.util.Map;

public class PersonalizedLearningPlatform {

    private Map<String, Integer> studentData;
    private Map<String, String> learningPath;

    public PersonalizedLearningPlatform() {
        studentData = new HashMap<>();
        learningPath = new HashMap<>();
    }

    /**
     * 添加学生学习数据
     * @param studentId 学生ID
     * @param progress 学习进度
     */
    public void addStudentData(String studentId, int progress) {
        studentData.put(studentId, progress);
        learningPath.put(studentId, "Path A");
    }

    /**
     * 更新学习路径
     * @param studentId 学生ID
     * @param path 学习路径
     */
    public void updateLearningPath(String studentId, String path) {
        learningPath.put(studentId, path);
    }

    /**
     * 获取学习路径
     * @param studentId 学生ID
     * @return 学习路径
     */
    public String getLearningPath(String studentId) {
        return learningPath.get(studentId);
    }

    public static void main(String[] args) {
        PersonalizedLearningPlatform learningPlatform = new PersonalizedLearningPlatform();
        learningPlatform.addStudentData("student1", 50);
        learningPlatform.addStudentData("student2", 30);
        learningPlatform.updateLearningPath("student1", "Path B");
        String path1 = learningPlatform.getLearningPath("student1");
        String path2 = learningPlatform.getLearningPath("student2");
        System.out.println("Student1 learning path: " + path1);
        System.out.println("Student2 learning path: " + path2);
    }
}