作者介绍：
本人Java特工，代号：Cris Li ； 中文名：克瑞斯理
简书地址: 消失的码农 - 简书
CSDN地址: /jianli95
个人纯洁版博客: https://lijian69.github.io/blog/
为什么要使用 EasyPoi
分析：当下流行的Excel导出的Poi工具
EasyPoi的详细介绍
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
语言(熟悉的表达式语法),完成以前复杂的写法
独特的功能
基于注解的导入导出,修改注解就可以修改Excel支持常用的样式自定义基于map可以灵活定义的表头字段支持一堆多的导出,导入支持模板的导出,一些常见的标签,自定义标签支持HTML/Excel转换,如果模板还不能满足用户的变态需求,请用这个功能支持word的导出,支持图片,Excel
使用步骤
1.maven 或者 Gradle 引入相关依赖
<dependencies><!-- 集成easypoi组件 .导出excel http://easypoi.mydoc.io/ --><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><!-- 这个依赖相当于上面 easypoi-base、easypoi-web、easypoi-annotation这3个依赖,可以引入上面3个依赖，也可以引入下面这一个，两个方案二选一--><!-- <dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-spring-boot-starter</artifactId><version>3.2.0</version></dependency> --></dependencies>
2.定义实体对象(也是 你下载的对象，这里只是简单注解)
@ExcelTarget("20")@Datapublic class User implements java.io.Serializable{@Excel(name = "id", width=15)@NotBlank(message = "该字段不能为空")private Integer id;@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 = "生日", exportFormat = "yyyy-MM-dd", orderNum = "2", width=30)private String birthday;}
3. Excel导入导出工具类 、封装了调用EasyPoi APi底层接口的Excel导入导出工具类，直接调用工具类即可
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 mons.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 .URLEncoder;import java.util.List;import java.util.Map;import java.util.NoSuchElementException;//Excel导入导出工具类public class ExcelUtils {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;}}
4.导出即可
List<User> personList = userService.findAll();// 导出操作ExcelUtils.exportExcel(personList, "easypoi导出功能", "导出sheet1", User.class, "测试user.xls", re
作者：消失的码农
链接：/p/c91cd893663d
来源：简书
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