JAVA实现easyExcel模版导出

easyExcel文档

模板注意：

用 {} 来表示你要用的变量，如果本来就有"{“,”}" ，特殊字符用"{“,”}"代替
{} 代表普通变量
{.}代表是list的变量

添加pom依赖

<dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>2.2.6</version>
</dependency><!--工具类-->
<dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.3.1</version>
</dependency>
<dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.21</version>
</dependency>

第一种：简单模版导出

实体类

package com.example.mybatismysql8demo.excel;import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;import java.io.Serializable;
import java.math.BigDecimal;@NoArgsConstructor
@AllArgsConstructor
@Accessors(chain = true)
@Data
public class TemplateGoodsExcel implements Serializable {private String goodsName;private Integer num;private BigDecimal price;public TemplateGoodsExcel(String goodsName, BigDecimal price, Integer num) {this.goodsName = goodsName;this.price = price;this.num = num;}}

导出模版
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执行方法

package com.example.mybatismysql8demo.controller;import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.support.ExcelTypeEnum;
import com.alibaba.excel.write.metadata.WriteSheet;
import com.alibaba.excel.write.metadata.fill.FillConfig;
import com.example.mybatismysql8demo.excel.TemplateGoodsExcel;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletResponse;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.math.BigDecimal;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.*;@RestController
public class EasyExcelController {/*** 本地下载* @param args*/public static void main(String[] args) {//模版路径String path = "E:\\模板\\商品.xls";//文件下载路径String fileName = "E:\\" + System.currentTimeMillis() + ".xls";//数据List<TemplateGoodsExcel> data = new ArrayList<>();data.add(new TemplateGoodsExcel("苹果",new BigDecimal(10),100));data.add(new TemplateGoodsExcel("香蕉",new BigDecimal(8),200));ExcelWriter excelWriter = EasyExcel.write(fileName).withTemplate(path).build();WriteSheet writeSheet = EasyExcel.writerSheet().build();//列表数据excelWriter.fill(data, writeSheet);//基础数据Map<String, Object> map = new HashMap<>(2);map.put("goodsName", "商品信息");excelWriter.fill(map, writeSheet);excelWriter.finish();}/*** 浏览器下载* @param response*/@RequestMapping(value = "easyExcelExport", method = RequestMethod.GET)private void browserDownload(HttpServletResponse response){OutputStream out = null;try {out = getOutputStream("商品信息",response);ExcelWriter excelWriter =  EasyExcel.write(out).withTemplate("E:\\模板\\商品.xls").excelType(ExcelTypeEnum.XLS).build();WriteSheet writeSheet = EasyExcel.writerSheet().build();//列表数据List<TemplateGoodsExcel> data = new ArrayList<>();data.add(new TemplateGoodsExcel("苹果",new BigDecimal(10),100));data.add(new TemplateGoodsExcel("香蕉",new BigDecimal(8),200));excelWriter.fill(data, writeSheet);//基础数据Map<String,Object> map = new HashMap<>(1);map.put("goodsName", "商品信息");excelWriter.fill(map, writeSheet);excelWriter.finish();} finally {try {if (out != null){out.flush();out.close();}} catch (IOException e) {System.out.println(e.getMessage());}}}/*** 此段代码是工具类ExcelUtils中的 用于输出Excel流*/private OutputStream getOutputStream(String fileName, HttpServletResponse response) {try {fileName = URLEncoder.encode(fileName, StandardCharsets.UTF_8);response.setContentType("application/vnd.ms-excel");response.setCharacterEncoding("utf8");response.setHeader("Content-Disposition", "attachment; filename=" + fileName + ".xls");response.setHeader("Pragma", "public");response.setHeader("Cache-Control", "no-store");response.addHeader("Cache-Control", "max-age=0");return response.getOutputStream();} catch (IOException e) {System.out.println(e.getMessage());}return null;}}

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第二种：复杂模版导出

导出模版
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执行方法

package com.example.mybatismysql8demo.controller;import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.support.ExcelTypeEnum;
import com.alibaba.excel.write.metadata.WriteSheet;
import com.alibaba.excel.write.metadata.fill.FillConfig;
import com.alibaba.excel.write.metadata.fill.FillWrapper;
import com.alibaba.excel.write.metadata.style.WriteCellStyle;
import com.alibaba.excel.write.style.HorizontalCellStyleStrategy;
import com.example.mybatismysql8demo.excel.TemplateGoodsExcel;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletResponse;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.math.BigDecimal;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.*;@RestController
public class EasyExcelController {/*** 浏览器下载* @param response*/@RequestMapping(value = "easyExcelExport", method = RequestMethod.GET)private void browserDownload(HttpServletResponse response){OutputStream out = null;try {out = getOutputStream("商品信息",response);ExcelWriter excelWriter =  EasyExcel.write(out).withTemplate("E:\\模板\\商品.xls").excelType(ExcelTypeEnum.XLS).build();WriteSheet writeSheet = EasyExcel.writerSheet().build();//这里注意入参用了forceNewRow 代表在写入list的时候不管list下面有没有空行 都会创建一行，然后下面的数据往后移动。默认 是false，会直接使用下一行，如果没有则创建。//forceNewRow 如果设置了true,有个缺点 就是他会把所有的数据都放到内存了，所以慎用//简单的说 如果你的模板有list,且list不是最后一行，下面还有数据需要填充 就必须设置 forceNewRow=true 但是这个就会把所有数据放到内存 会很耗内存FillConfig fillConfig = FillConfig.builder().forceNewRow(Boolean.TRUE).build();//列表数据List<TemplateGoodsExcel> data = new ArrayList<>();data.add(new TemplateGoodsExcel("辣条",new BigDecimal(10),100));data.add(new TemplateGoodsExcel("娃哈哈",new BigDecimal(8),200));List<TemplateGoodsExcel> data2 = new ArrayList<>();data2.add(new TemplateGoodsExcel("葡萄",new BigDecimal(16),50));data2.add(new TemplateGoodsExcel("榴莲",new BigDecimal(30),10));//如果有多个list 模板上必须有{前缀.} 这里的前缀就是 data1，然后多个list必须用 FillWrapper包裹excelWriter.fill(new FillWrapper("dataOne", data), fillConfig, writeSheet);excelWriter.fill(new FillWrapper("dataTwo", data2), fillConfig, writeSheet);//基础数据Map<String,Object> map = new HashMap<>(1);map.put("goodsName", "食品信息");map.put("name", "水果信息");map.put("date", "2019年10月9日13:28:28");excelWriter.fill(map, writeSheet);excelWriter.finish();} finally {try {if (out != null){out.flush();out.close();}} catch (IOException e) {System.out.println(e.getMessage());}}}/*** 此段代码是工具类ExcelUtils中的 用于输出Excel流*/private OutputStream getOutputStream(String fileName, HttpServletResponse response) {try {fileName = URLEncoder.encode(fileName, StandardCharsets.UTF_8);response.setContentType("application/vnd.ms-excel");response.setCharacterEncoding("utf8");response.setHeader("Content-Disposition", "attachment; filename=" + fileName + ".xls");response.setHeader("Pragma", "public");response.setHeader("Cache-Control", "no-store");response.addHeader("Cache-Control", "max-age=0");return response.getOutputStream();} catch (IOException e) {System.out.println(e.getMessage());}return null;}}