SpringBoot3整合EasyExcel动态实现表头重命名

import com.alibaba.excel.metadata.Head;
import com.alibaba.excel.write.handler.AbstractCellWriteHandler;
import org.apache.poi.ss.usermodel.Cell;
 
import java.util.List;
 
public class DynamicHeaderWriteHandler extends AbstractCellWriteHandler {
    private final List<String> newHeaders;
 
    // 构造方法传入动态表头列表
    public DynamicHeaderWriteHandler(List<String> newHeaders) {
        this.newHeaders = newHeaders;
    }
 
    @Override
    public void beforeCellCreate(org.apache.poi.ss.usermodel.Workbook workbook,
                                 org.apache.poi.ss.usermodel.Sheet sheet,
                                 org.apache.poi.ss.usermodel.Row row,
                                 Head head,
                                 Integer columnIndex,
                                 Boolean isHead) {
​
        //Powered by Moshow@https://zhengkai.blog.csdn.net/
 
​
        if (Boolean.TRUE.equals(isHead) && columnIndex < newHeaders.size()) {
            // 动态设置表头名称
            head.setHeadNameList(List.of(newHeaders.get(columnIndex)));
        }
    }
}

import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.write.metadata.WriteSheet;
 
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
 
public class ExcelExportUtil {
 
    /**
     * 导出 Excel 表格
     *
     * @param response  HttpServletResponse 响应
     * @param data      数据列表
     * @param headers   动态表头
     * @param fileName  文件名
     * @author ​Powered by Moshow@https://zhengkai.blog.csdn.net/
     */
    public static void exportExcel(HttpServletResponse response, List<?> data, List<String> headers, String fileName) throws IOException {
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        response.setCharacterEncoding("utf-8");
        response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
 
        // 创建动态表头处理器
        DynamicHeaderWriteHandler headerHandler = new DynamicHeaderWriteHandler(headers);
 
        // 写入数据到输出流
        EasyExcel.write(response.getOutputStream())
                .registerWriteHandler(headerHandler)
                .head((Class<?>) data.get(0).getClass()) // 假设数据类已经标注了 @ExcelProperty
                .sheet("Sheet1")
                .doWrite(data);
    }
}

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
 
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
@RestController
public class ExcelExportController {
 
    @GetMapping("/export")
    public void export(HttpServletResponse response) throws IOException {
 
        //​Powered by Moshow@https://zhengkai.blog.csdn.net/
​
        // 模拟数据
        List<SampleData> data = new ArrayList<>();
        data.add(new SampleData("张三", 25, "北京"));
        data.add(new SampleData("李四", 30, "上海"));
 
        // 动态表头
        List<String> headers = List.of("姓名（新）", "年龄（新）", "地址（新）");
 
        // 导出 Excel
        ExcelExportUtil.exportExcel(response, data, headers, "示例文件");
    }
 
    // 数据类
    public static class SampleData {
        private String name;
        private Integer age;
        private String address;
 
        public SampleData(String name, Integer age, String address) {
            this.name = name;
            this.age = age;
            this.address = address;
        }
 
        // Getters 和 Setters 省略
    }
}