Springboot excel 导出

阿里Excel导出，支持通过实体类导出，自定义表头动态导出，导出简单容易上手

        
            com.alibaba
            easyexcel
            2.1.7
        

import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.write.metadata.WriteSheet;
import lombok.extern.slf4j.Slf4j;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

/**
 * @Author: LiSaiHang
 * @Date: 2022/6/29 4:24 下午
 */
@Slf4j
public class ExcelUtils {

    /**
     * excel 根据自定义表头 导出
     * @param response
     * @param list
     * @param sheetName
     * @param headList 自定义表头
     */
    public static void export(HttpServletResponse response, List list, String sheetName, List> headList) {
        String fileName = System.currentTimeMillis() + ".xlsx";
        response.setHeader("content-Type","application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");
        response.setHeader("Content-disposition", "attachment;filename=" + fileName);
        ExcelWriter excelWriter = null;
        try {
            excelWriter = EasyExcel.write(response.getOutputStream()).build();
            final WriteSheet sheet0 = EasyExcel.writerSheet(0, sheetName).head(headList).build();
            excelWriter.write(list, sheet0);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (excelWriter != null) {
                log.info("执行完毕");
                excelWriter.finish();
            }
        }
    }

    /**
     * 根据实体类 导出excel
     * @param response
     * @param list
     * @param sheetName
     * @param clazz
     */
    public static void export(HttpServletResponse response, List list, String sheetName, Class clazz) {
        String fileName = System.currentTimeMillis() + ".xlsx";
        response.setHeader("content-Type","application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");
        response.setHeader("Content-disposition", "attachment;filename=" + fileName);
        ExcelWriter excelWriter = null;
        try {
            excelWriter = EasyExcel.write(response.getOutputStream()).build();
            final WriteSheet sheet0 = EasyExcel.writerSheet(0, sheetName).head(clazz).build();
            excelWriter.write(list, sheet0);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (excelWriter != null) {
                log.info("执行完毕");
                excelWriter.finish();
            }
        }
    }
}

1. 自定义表头导出

params: "name,phone,age,icCard"

@GetMapping("/export")
    @ApiOperation(value = "Excel模板导出", notes = "")
    public void exportExcel(@RequestParam String params, HttpServletResponse response) {
        // 写法1
        log.info("根据参数{}导出", params);
        final List> headList = new ArrayList<>();
        final List paramList = Arrays.asList(params.split(","));
        for (String param : paramList) {
            final List tempList = new ArrayList<>();
            tempList.add(param);
            headList.add(tempList);
        }
        ExcelUtils.export(response, new ArrayList(), "模板", headList);
    }

2. 实体类导出

@GetMapping("/records/export")
    @ApiOperation(value = "发送记录导出", notes = "")
    public void recordsExportExcel(QueryRecordsVo param, HttpServletResponse response) {
        // 根据业务查询，返回list
        final List list = result.getList();
        if (CollectionUtil.isEmpty(list)) {
            throw new ApiException("查询数据失败！");
        }
        List tempList = list.stream().map(item -> {
            return BeanUtil.copyProperties(item, Entity.class);
        }).collect(Collectors.toList());
        ExcelUtils.export(response, tempList, "模板", Entity.class);
    }