SpringBoot框架集成easypoi完成excel导出功能

1.首先新建一个SpringBoot微服务

2.只选择一个web就好

3.配置一下application.yml配置文件

server:
  port: 8080

spring:
  application:
    name: easypoi
  data:
  thymeleaf:
    encoding: UTF-8
    servlet:
      content-type: text/html

4.引入前台jar包以及easypoi核心jar包

        
        
            org.springframework.boot
            spring-boot-starter-thymeleaf
        

        
            cn.afterturn
            easypoi-base
            3.0.3
        
        
            cn.afterturn
            easypoi-web
            3.0.3
        
        
            cn.afterturn
            easypoi-annotation
            3.0.3
        

5.接着我们创建model层实体类

package com.lsc.model;


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

import java.util.Date;


public class Person {


    @Excel(name = "姓名", orderNum = "0")
    private String name;

    @Excel(name = "性别", replace = {"男_1", "女_2"}, orderNum = "1")
    private String sex;

    @Excel(name = "生日", exportFormat = "yyyy-MM-dd", orderNum = "2")
    private Date birthday;

    public Person(String name, String sex, Date birthday) {
        this.name = name;
        this.sex = sex;
        this.birthday = birthday;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }
}

6.创建easypoi导入导出工具类

package com.lsc.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.TemplateExportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import cn.afterturn.easypoi.excel.entity.params.ExcelExportEntity;
import com.lsc.model.Person;
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.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;

public class ExcelUtil {
    public static void exportExcel(List list, String title, String sheetName, Class pojoClass, String fileName, boolean isCreateHeader, HttpServletResponse response) throws Exception {
        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) throws Exception {
        defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
    }


    public static void exportExcel(List list, ExportParams exportParams, Class pojoClass,String fileName, HttpServletResponse response) throws Exception {
        defaultExport(list, pojoClass, fileName, response, exportParams);
    }
    public static void exportExcel(List> list, String fileName, HttpServletResponse response) throws Exception {
        defaultExport(list, fileName, response);
    }

    public static void exportExcel(Workbook workbook,String fileName,HttpServletResponse response) throws Exception {
        if (workbook != null) {
            downLoadExcel(fileName, response, workbook);
        }
    }

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

    private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) throws Exception{
        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 Exception(e.getMessage());
        }
    }

    private static void defaultExport(List> list, String fileName, HttpServletResponse response) throws Exception {
        Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
        if (workbook != null){
            downLoadExcel(fileName, response, workbook);
        }
    }

    public static  List importExcel(String filePath, Integer titleRows, Integer headerRows, Class pojoClass)throws Exception {
        if (StringUtils.isBlank(filePath)) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        List list = null;
        try {
            list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new Exception("模板不能为空");
        } catch (Exception e) {
            e.printStackTrace();
            throw new Exception(e.getMessage());
        }
        return list;
    }

    public static  List importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class pojoClass) throws Exception {
        if (file == null) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        List list = null;
        try {
            list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new Exception("excel文件不能为空");
        } catch (Exception e) {
            throw new Exception(e);
        }

        return list;
    }

    public static void handleExcel(HttpServletResponse response, String fileName, TemplateExportParams params, Map map) {
        Workbook workbook = ExcelExportUtil.exportExcel(params, map);


        if (workbook != null) {
            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 (UnsupportedEncodingException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public static ArrayList getExcelColumnList(List detailList) {
        ArrayList columnList = new ArrayList<>();
        if (detailList != null && detailList.size() > 0) {
            for (Person firstTempDetail : detailList) {
                //处理自定义表头
                ExcelExportEntity excelExportEntity = new ExcelExportEntity(firstTempDetail.getName(), firstTempDetail.getName());
                List items = (List) firstTempDetail.getBirthday();
                if (items != null && items.size() > 0) {
                    List excelExportList = new ArrayList<>();
                    for (Person item : items) {
                        excelExportList.add(new ExcelExportEntity(item.getName(), item.getName()));
                    }
                    excelExportEntity.setList(excelExportList);
                }
                columnList.add(excelExportEntity);
            }
        }
        return columnList;
    }
}

7.创建controller层测试方法

package com.lsc.controller;


import com.lsc.model.Person;
import com.lsc.utils.ExcelUtil;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

@RequestMapping("test")
@RestController
public class TestController {

    @RequestMapping("export")
    public void export(HttpServletResponse response) throws Exception {

        //模拟从数据库获取需要导出的数据
        List personList = new ArrayList<>();
        Person person1 = new Person("路飞","1",new Date());
        Person person2 = new Person("娜美","2", new Date());
        Person person3 = new Person("索隆","1", new Date());
        Person person4 = new Person("小狸猫","1", new Date());
        personList.add(person1);
        personList.add(person2);
        personList.add(person3);
        personList.add(person4);

        //导出操作
        ExcelUtil.exportExcel(personList,"花名册","草帽一伙",Person.class,"海贼王.xls",response);
    }

    @RequestMapping("importExcel")
    public void importExcel() throws Exception {
        String filePath = "E:\\海贼王.xls";
        //解析excel，
        List personList = ExcelUtil.importExcel(filePath,1,1,Person.class);
        //也可以使用MultipartFile,使用 FileUtil.importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class pojoClass)导入
        System.out.println("导入数据一共【"+personList.size()+"】行");

        //TODO 保存数据库
    }

}

8.创建页面跳转路径PageController

package com.lsc.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("page")
public class PageController {

    @RequestMapping("toindex")
    public String toindex(){
        return "list";
    }
}

9.创建前台页面，一个导出的按钮。指定Controller层测试方法的导出方法跳转路径

    
    


导出

10.目前的包结构如下：

11.接着我们访问前台路径http://localhost:8080/page/toindex

12.点击导出按钮，就会导出出来了。

13.这是excel中的内容：

完成。只是一个小demo。经供参考。谢谢