feat:学生相关的部分（补）

src/main/java/com/example/attendance/listener/StudentExcelListener.java

@@ -0,0 +1,29 @@
+package com.example.attendance.listener;
+
+import com.alibaba.excel.context.AnalysisContext;
+import com.alibaba.excel.event.AnalysisEventListener;
+import com.example.attendance.dto.StudentExcelDTO;
+import com.example.attendance.entity.Student;
+import com.example.attendance.mapper.StudentMapper;
+
+public class StudentExcelListener extends AnalysisEventListener<StudentExcelDTO> {
+    private final StudentMapper studentMapper;
+
+    public StudentExcelListener(StudentMapper studentMapper) {
+        this.studentMapper = studentMapper;
+    }
+
+    @Override
+    public void invoke(StudentExcelDTO data, AnalysisContext context) {
+        Student student = new Student();
+        student.setName(data.getName());
+        student.setId(Long.valueOf(data.getStudentId()));
+        student.setCurrentPoints(0);  // 初始积分为0
+        studentMapper.insertStudent(student);
+    }
+
+    @Override
+    public void doAfterAllAnalysed(AnalysisContext context) {
+        // 处理完成后的操作
+    }
+}