使用EasyPoi快速实现Excel的导入导出

excel.jpg

近期完成了后管系统报表的导入导出，完成之后做下总结

1、首先我们对采用的插件进行了筛选，最后选择EasyPoi，用的人也很多，算是对poi的简单封装

这里项目用的springboot，所以只用pom引入配置即可

        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-base</artifactId>
            <version>3.0.3</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-web</artifactId>
            <version>3.0.3</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-annotation</artifactId>
            <version>3.0.3</version>
        </dependency>

2、根据配置编写实体类

先简单介绍一下关于@Excel注解的一些常用属性
name：列名
orderNum：第几列
replace：值得替换例：replace = {"身份证_1"} 数据库值为"1"，导出时会自动被"身份证"代替

    @Excel(name = "姓名", orderNum = "0")
    private String name;
    @Excel(name = "证件类型", replace = {"身份证_1"}, orderNum = "1")
    private String identifyType;
    @Excel(name = "证件号码", orderNum = "2")
    private String identifyNo;
    @Excel(name = "手机号1", orderNum = "3")
    private String phoneA;
    @Excel(name = "手机号2", orderNum = "4")
    private String phoneB;
    @Excel(name = "手机号3", orderNum = "5")
    private String phoneC;
    @Excel(name = "固定电话", orderNum = "6")
    private String telephone;
    @Excel(name = "电子邮箱", orderNum = "7")
    private String email;
    @Excel(name = "身份证地址", orderNum = "8")
    private String idcardAdress;
    @Excel(name = "户籍地址", orderNum = "9")
    private String householdAddress;
    @Excel(name = "居住地址", orderNum = "10")
    private String liveAddress;
    @Excel(name = "工作地址", orderNum = "11")
    private String workAddress;

3、整合导入导出方法

package com.***.common;

import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import org.apache.commons.lang.StringUtils;
import javax.servlet.http.HttpServletResponse;

import org.apache.poi.ss.usermodel.Workbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;

public class FileWithExcelUtil {
    private static final Logger log = LoggerFactory.getLogger(FileWithExcelUtil .class);
    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass,String fileName,boolean isCreateHeader, HttpServletResponse response){
        ExportParams exportParams = new ExportParams(title, sheetName);
        exportParams.setCreateHeadRows(isCreateHeader);
        defaultExport(list, pojoClass, fileName, response, exportParams);

    }
    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass,String fileName, HttpServletResponse response){
        defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
    }
    public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response){
        defaultExport(list, fileName, response);
    }

    private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams) {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams,pojoClass,list);
        if (workbook != null);
        downLoadExcel(fileName, response, workbook);
    }

    private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Content-Disposition",
                    "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            workbook.write(response.getOutputStream());
        } catch (IOException e) {
            log.error("[monitor][IO][表单功能]", e);
        }
    }
    private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
        Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
        if (workbook != null);
        downLoadExcel(fileName, response, workbook);
    }

    public static <T> List<T> importExcel(String filePath,Integer titleRows,Integer headerRows, Class<T> pojoClass){
        if (StringUtils.isBlank(filePath)){
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        List<T> list = null;
        try {
            list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
        }catch (NoSuchElementException e){
            throw e;
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
        return list;
    }
    public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass){
        if (file == null){
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        List<T> list = null;
        try {
            list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
        }catch (NoSuchElementException e){
            throw e;
        } catch (Exception e) {
            e.printStackTrace();
            log.error("[monitor][表单功能]", e);
        }
        return list;
    }

}

4、导出操作

/**
     * 导出模版
     * @param response
     */
    @RequestMapping("/exportExcel/model")
    public ResponseModel export(HttpServletResponse response){
       try {
            //模拟从数据库获取需要导出的数据
            List<CustomerList> personList = new ArrayList<>();
            FileWithExcelUtil.exportExcel(personList,"客户信息表","客户表",CustomerList.class,"客户表.xls",response);
            return ResponseModel.success("操作成功");
        } catch (Exception e) {
            logger.info("getCustomerPage", e);
            return ResponseModel.fail("导出模版失败");
            // TODO: handle exception
        }
      
    }

5、导入操作

将导入的模版数据拿到，填充到自己要使用的实体类
ps：导入的数据模版一般都是平铺的，而我们的实体类一般都有层次，所以我们的excel模版实体往往不是我们数据库对应的bean，需要我们将其自行填充

/**
     * 导入excel
     */
    @RequestMapping(value = "/importExcelForType", method = RequestMethod.POST)
    public ResponseModel importExcel(@RequestParam("file") MultipartFile file,String customerType){
        try {
//          String filePath = "/Users/***/Downloads/response.xls";
            //解析excel，
//          List<CustomerList> personList = FileWithExcelUtil.importExcel(filePath, 1, 1, CustomerList.class);
            List<CustomerList> personList = FileWithExcelUtil.importExcel(file, 1, 1, CustomerList.class);
            //也可以使用MultipartFile,使用 FileUtil.importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass)导入
            System.out.println("导入数据一共【"+personList.size()+"】行");
            
            for (int i = 0; i < personList.size(); i++) {
                CustomerList excel = personList.get(i);
                CmCustomerForExcel customer =  customerListByExcel(excel);
                customer.setCustomerType(customerType);
                customerService.saveExcelList(customer);
            }
            logger.info(personList.toString());
            return ResponseModel.success("操作成功");
            
        } catch (Exception e) {
            // TODO: handle exception
            logger.error(e.toString());
            return ResponseModel.fail("导入失败");
        }

补充

高级用法可参考EasyPoi的官方文档：http://easypoi.mydoc.io