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SpringBoot中使用EasyPoi导出excel

Java光头强 • • 技术随笔 • 阅读 300

导读：本篇文章讲解 SpringBoot中使用EasyPoi导出excel，希望对大家有帮助，欢迎收藏，转发！站点地址：www.bmabk.com

以往数据的导入导出，都是使用传统的poi进行操作的。相对来说较为麻烦，推荐使用EasyPoi。几行代码，几个注解就可以完事，方便快捷。废话不多说，具体操作如下：

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

一、在线快速创建一个SpringBoot项目

具体操作：https://blog.csdn.net/weixin_43770545/article/details/90764631

二、引入EasyPoi的pom依赖
      <!--EasyPoi导入导出-->
        <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>

我在SpringBoot下使用的，所有依赖：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.5.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.wy</groupId>
	<artifactId>testEasyPoi</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>testEasyPoi</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</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>
        <!--EasyPoi导入导出-->
        <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>
        <!-- 文件上传 -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>
三、实体类上方加注解

我这边使用了lombok。getter setter和构造方法通过注解 @Data @AllArgsConstructor进行添加，不使用lombok也可手动添加。

要导出的数据可在实体类对应属性上方加@Excel()注解。可定义导出列的名称、宽度，以及性别可区分化(一般数据库中存储的性别为1和2)，日期格式化等等。

package com.wy.testEasyPoi.entity;

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

import java.util.Date;

/**
 * @author wangyan@163.com
 * @version 1.0
 * @date 2019-08-30 15:55
 */
@Data
@AllArgsConstructor
public class Student {
    @Excel(name = "姓名", orderNum = "0", width = 30)
    private String name;
    @Excel(name = "性别", replace = {"男_1", "女_2"}, orderNum = "1", width = 30)
    private String sex;
    @Excel(name = "年龄", orderNum = "2", width = 10)
    private Integer age;
    @Excel(name = "生日", exportFormat = "yyyy-MM-dd", orderNum = "3", width = 30)
    private Date birthday;
}
四、工具类
package com.wy.testEasyPoi.util;

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;

/**
 * @author wangyan@163.com
 * @version 1.0
 * @date 2019-08-30 15:51
 */
public class EasyPoiExcelUtil {

    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.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            response.setCharacterEncoding("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;
    }
}

本质上是调用的这个方法:

 private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
        try {
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            response.setCharacterEncoding("UTF-8");
            workbook.write(response.getOutputStream());
        } catch (IOException e) {
            //throw new NormalException(e.getMessage());
        }
    }
五、Controller中定义
package com.wy.testEasyPoi.controller;

import com.wy.testEasyPoi.entity.Student;
import com.wy.testEasyPoi.util.EasyPoiExcelUtil;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

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

/**
 * @author wangyan@163.com
 * @version 1.0
 * @date 2019-08-30 16:07
 */
@RestController
public class TestEasyPoiExcelController {
    @GetMapping("/export")
    public void export(HttpServletResponse response){

        //模拟从数据库获取需要导出的数据,实战换为数据访问层返回的结果就行。
        List<Student> studentList = new ArrayList<>();
        Student student=new Student("山石","2",20,new java.util.Date());
        Student student1=new Student("张珍","2",20,new java.util.Date());
        Student student2=new Student("从","1",20,new java.util.Date());
        Student student3=new Student("家乐","1",20,new java.util.Date());
        Student student4=new Student("大潘","2",20,new java.util.Date());
        Student student5=new Student("婷婷","2",20,new java.util.Date());
        studentList.add(student);
        studentList.add(student1);
        studentList.add(student2);
        studentList.add(student3);
        studentList.add(student4);
        studentList.add(student5);
        //导出操作
        EasyPoiExcelUtil.exportExcel(studentList,"学生信息统计","学生信息",Student.class,"学生信息.xls",response);
    }
}
六、运行项目测试

项目启动后在浏览器中访问：http://localhost:8080/export
在这里插入图片描述
打开导出的excel
在这里插入图片描述

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