java导出excel(easypoi)

介绍

easypoi功能如同名字easy,主打的功能就是容易,让一个没见接触过poi的人员
就可以方便的写出Excel导出,Excel模板导出,Excel导入,Word模板导出,通过简单的注解和模板
官网地址:http://easypoi.mydoc.io/

easypoi需要导入的包

                <!--easypoi-->
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-base</artifactId>
            <version>3.2.0</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-web</artifactId>
            <version>3.2.0</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-annotation</artifactId>
            <version>3.2.0</version>
        </dependency>

easypoi工具类

package com.meeno.framework.office.excel.easypoi.utils;

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;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;

/**
 * @description: easypoiUtils
 * @author: Wzq
 * @create: 2019-11-08 14:54
 */
public class ExcelUtiles {


    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) {
            //throw new NormalException(e.getMessage());
        }
    }

    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 new NormalException("模板不能为空");
        } catch (Exception e) {
            e.printStackTrace();
            //throw new NormalException(e.getMessage());
        } 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 new NormalException("excel文件不能为空");
        } catch (Exception e) {
            //throw new NormalException(e.getMessage());
            System.out.println(e.getMessage());
        }
        return list;
    }
}

创建导出excel模板的实体类，也可以按照模板导出具体看官网文档

导出excel模板的实体类代码如下：

package com.meeno.framework.office.excel.easypoi.model;

import cn.afterturn.easypoi.excel.annotation.Excel;
import lombok.Data;

import java.io.Serializable;

/**
 * @description: 签到记录ExecelModel
 * @author: Wzq
 * @create: 2020-01-07 11:34
 */
@Data
public class SignRecordExcelModel implements Serializable {

    /**
     * 序号
     */
    @Excel(name = "序号",orderNum = "0")
    private Integer number;

    /**
     * 人员名称
     */
    @Excel(name = "人员名称",orderNum = "1")
    private String employeeName;

    /**
     * 座位号
     */
    @Excel(name = "座位号",orderNum = "2")
    private Integer seatNum;

    /**
     * 签到状态
     */
    @Excel(name = "签到状态",orderNum = "3")
    private String signStatusStr;

}

使用easypoi导出excel

controller层调用代码

/**
    *@Description 导出登录记录表
    *@Param [session, request, response, data]
    *@Return void
    *@Author Wzq
    *@Date 2020/1/7
    *@Time 11:06
    */
    @RequestMapping(value = "exportSignRecord.action")
    public void  exportSignRecord(final HttpSession session,
                                  final HttpServletRequest request,
                                  final HttpServletResponse response,
                                  @RequestParam(value = "Data",required = false) String data){
        JSONObject jsonObject = JSONObject.parseObject(data);
        //会议id
        Long meetingId = jsonObject.getLong("meetingId");
        List<SignRecordExcelModel> signRecordExcelModels = this.signRecordService.exportSignRecord(meetingId);
        Meeting meeting = this.meetingService.getMeetingDetail(meetingId);
        //第一参数:导出的模板类集合
        //第二参数:excel中里面内容合并单元格的title
        //第三参数:seeetName名称
        //第四参数:导出模板实体类的class
        //第五参数:导出文件文件名
        //第六参数:HttpServletResponse
        ExcelUtiles.exportExcel(signRecordExcelModels,"","签到表",SignRecordExcelModel.class,meeting.getName()+"签到表.xlsx",response);
    }

导出效果

 

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个人微信公众，经常更新一些实用的干货:

 

 

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来源：oschina

链接：https://my.oschina.net/u/4115084/blog/3188805