使用SpringBoot与EasyExcel实现复杂的导入导出

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>easyexcel</artifactId>
    <version>2.4.3</version>
</dependency>

import com.alibaba.excel.annotation.ExcelProperty;
import lombok.Data;
@Data
public class Student {
    @ExcelProperty("姓名")
    private String name;
    @ExcelProperty("年龄")
    private Integer age;
    @ExcelProperty("成绩")
    private Double score;
}

import com.alibaba.excel.EasyExcel;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class StudentService {
    public void importStudents(List<Student> students) {
        // 将导入的学生信息保存到数据库
        // ...
    }
    public List<Student> getAllStudents() {
        // 从数据库获取学生信息
        // ...
    }
    public void exportStudentsToExcel(String filePath) {
        List<Student> students = getAllStudents();
        EasyExcel.write(filePath, Student.class)
                .registerWriteHandler(new CustomCellStyleStrategy()) // 注册自定义样式
                .sheet("Sheet1")
                .doWrite(students);
    }
}

import com.alibaba.excel.write.handler.AbstractCellStyleStrategy;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
public class CustomCellStyleStrategy extends AbstractCellStyleStrategy {
    @Override
    protected void setContentCellStyle(Cell cell, Head head, Integer relativeRowIndex) {
        if (relativeRowIndex % 2 == 0) {
            setStyle(cell, IndexedColors.LIGHT_YELLOW.getIndex());
        } else {
            setStyle(cell, IndexedColors.LIGHT_GREEN.getIndex());
        }
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;
import java.util.List;
@RestController
@RequestMapping("/students")
public class StudentController {
    @Autowired
    private StudentService studentService;
    @PostMapping("/import")
    public void importStudents(@RequestParam("file") MultipartFile file) throws IOException {
        List<Student> students = EasyExcel.read(file.getInputStream()).head(Student.class).sheet().doReadSync();
        studentService.importStudents(students);
    }
    @GetMapping("/export")
    public void exportStudents(@RequestParam("file") String filePath) {
        studentService.exportStudentsToExcel(filePath);
    }
}