SpringBoot+EasyPoi实现excel导出功能

文章目录[隐藏]

实现过程

在实际项目开发中,对于Excel的导入导出还是很常见的需求,比如说将数据根据模板批量导入到数据库中,以及将数据库中的数据批量导出陈Excel的形式

现有需求: 根据检索条件查询列表并将结果导出到excel

Easypoi文档：https://easypoi.mydoc.io/#text_186900

EasyPoi的主要特点

1.设计精巧,使用简单
2.接口丰富,扩展简单
3.默认值多,write less do more
4.spring mvc支持,web导出可以简单明了

实现过程

1.创建一个Spring Boot项目

快速生成链接：start.spring.io

2.引入EasyPoi的pom依赖

<!--EasyPoi导入导出-->
<dependency>
   <groupId>cn.afterturn</groupId>
   <artifactId>easypoi-base</artifactId>
   <version>4.3.0</version>
</dependency>
<dependency>
   <groupId>cn.afterturn</groupId>
   <artifactId>easypoi-web</artifactId>
   <version>4.3.0</version>
</dependency>
<dependency>
   <groupId>cn.afterturn</groupId>
   <artifactId>easypoi-annotation</artifactId>
   <version>4.3.0</version>
</dependency>

easypoi-base 导入导出的工具包,可以完成Excel导出,导入,Word的导出,Excel的导出功能
easypoi-web 耦合了spring-mvc 基于AbstractView,极大的简化spring-mvc下的导出功能
easypoi-annotation 基础注解包,作用与实体对象上,拆分后方便maven多工程的依赖管理

sax 导入使用xercesImpl这个包(这个包可能造成奇怪的问题哈),word导出使用poi-scratchpad,都作为可选包了

pom.xml中的所有依赖：

<dependencies>
     <!-- 导入web支持：SpringMVC开发支持，Servlet相关的程序 -->
     <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-web</artifactId>
     </dependency>

     <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-devtools</artifactId>
         <scope>runtime</scope>
         <optional>true</optional>
     </dependency>
     <dependency>
         <groupId>org.projectlombok</groupId>
         <artifactId>lombok</artifactId>
         <optional>true</optional>
     </dependency>
     <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-test</artifactId>
         <scope>test</scope>
     </dependency>
     <!-- mybatis相关的依赖 -->
     <!--mybatis-plus自动的维护了mybatis以及mybatis-spring的依赖，
     在springboot中这三者不能同时的出现，避免版本的冲突，表示：跳进过这个坑-->
     <!--mybatis-plus-->
     <dependency>
         <groupId>com.baomidou</groupId>
         <artifactId>mybatis-plus-boot-starter</artifactId>
         <version>3.4.3</version>
     </dependency>
     <!--mysql驱动-->
     <dependency>
         <groupId>mysql</groupId>
         <artifactId>mysql-connector-java</artifactId>
         <scope>runtime</scope>
     </dependency>
     <!-- alibaba的druid数据库连接池 -->
     <dependency>
         <groupId>com.alibaba</groupId>
         <artifactId>druid</artifactId>
         <version>1.1.20</version>
     </dependency>
     <!-- alibaba的druid数据库连接池 -->
     <dependency>
         <groupId>com.alibaba</groupId>
         <artifactId>druid-spring-boot-starter</artifactId>
         <version>1.1.20</version>
     </dependency>
     <!--swagger2依赖-->
     <dependency>
         <groupId>io.springfox</groupId>
         <artifactId>springfox-swagger2</artifactId>
         <version>2.9.2</version>
         <!--排除自身的依赖1.5.20版本-->
         <exclusions>
             <exclusion>
                 <groupId>io.swagger</groupId>
                 <artifactId>swagger-models</artifactId>
             </exclusion>
         </exclusions>
     </dependency>
     <dependency>
         <groupId>io.springfox</groupId>
         <artifactId>springfox-swagger-ui</artifactId>
         <version>2.9.2</version>
     </dependency>
     <!--此版本解决 example="" 造成的 空字符串""无法转成Number 问题-->
     <dependency>
         <groupId>io.swagger</groupId>
         <artifactId>swagger-models</artifactId>
         <version>1.5.21</version>
     </dependency>
     <!--EasyPoi导入导出-->
     <dependency>
         <groupId>cn.afterturn</groupId>
         <artifactId>easypoi-base</artifactId>
         <version>4.3.0</version>
     </dependency>
     <dependency>
         <groupId>cn.afterturn</groupId>
         <artifactId>easypoi-web</artifactId>
         <version>4.3.0</version>
     </dependency>
     <dependency>
         <groupId>cn.afterturn</groupId>
         <artifactId>easypoi-annotation</artifactId>
         <version>4.3.0</version>
     </dependency>

     <!--fastjson-->
     <dependency>
         <groupId>com.alibaba</groupId>
         <artifactId>fastjson</artifactId>
         <version>1.2.71</version>
     </dependency>
 </dependencies>

3.编写excel工具类

package com.example.easypoiexceldemo.utils;

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.beans.BeanUtils;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.List;

/**
 * excel工具类
 * @author qzz
 */
public class ExcelUtils {

    /**
     * Excel导出
     *
     * @param response      response
     * @param fileName      文件名
     * @param list          数据List
     * @param pojoClass     对象Class
     */
    public static void exportExcel(HttpServletResponse response, String fileName, Collection<?> list, Class<?> pojoClass) throws IOException {
        if (StringUtils.isBlank(fileName)) {
            //当前日期
            SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
            fileName = df.format(new Date());
        }
        Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams(fileName, fileName, ExcelType.HSSF), pojoClass, list);
        response.setCharacterEncoding("UTF-8");
        response.setHeader("content-Type", "application/vnd.ms-excel");
        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8") + ".xls");
        ServletOutputStream out = response.getOutputStream();
        workbook.write(out);
        out.flush();
    }

    /**
     * Excel导出，先sourceList转换成List<targetClass>，再导出
     *
     * @param response      response
     * @param fileName      文件名
     *<p>本文来源gao!daima.com搞$代!码#网#</p> @param sourceList    原数据List
     * @param targetClass   目标对象Class
     */
    public static void exportExcelToTarget(HttpServletResponse response, String fileName, Collection<?> sourceList, Class<?> targetClass) throws Exception {
        List targetList = new ArrayList<>(sourceList.size());
        for (Object source : sourceList) {
            Object target = targetClass.newInstance();
            BeanUtils.copyProperties(source, target);
            targetList.add(target);
        }
        exportExcel(response, fileName, targetList, targetClass);
    }


    /**
     * Excel导出----设置title---sheetName---要求Collection<?> list是Class<?> pojoClass类型的
     *
     * @param response      response
     * @param fileName      文件名
     * @param list          数据List
     * @param pojoClass     对象Class
     */
    public static void exportExcel(HttpServletResponse response, String title, String sheetName, String fileName, Collection<?> list, Class<?> pojoClass) throws IOException {
        if (StringUtils.isBlank(fileName)) {
            //当前日期
            SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
            fileName = df.format(new Date());
        }
        Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams(title, sheetName, ExcelType.HSSF), pojoClass, list);
        response.setCharacterEncoding("UTF-8");
        response.setHeader("content-Type", "application/vnd.ms-excel");
        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8") + ".xls");
        ServletOutputStream out = response.getOutputStream();
        workbook.write(out);
        out.flush();
    }
}

4.在实体类上加注解@Excel

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转载请注明原文链接：SpringBoot+EasyPoi实现excel导出功能

实现过程

1.创建一个Spring Boot项目

2.引入EasyPoi的pom依赖

3.编写excel工具类

4.在实体类上加注解@Excel

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