EasyExcel读模板生成excel文件&注解Bean生成文件

1、EasyExce依赖准备

1. EasyExcel依赖

    
    <dependency>
      <groupId>com.alibabagroupId>
      <artifactId>easyexcelartifactId>
      <version>3.1.0version>
    dependency>

2. apache poi依赖

        EasyExcel同时依赖Apache POI库，同时还需要注意下两个库的版本对应关系。EasyExcel可能升级对poi的依赖，导致功能不兼容。

    
    <dependency>
      <groupId>org.apache.poigroupId>
      <artifactId>poiartifactId>
      <version>5.2.2version>
    dependency>
    
    <dependency>
      <groupId>org.apache.poigroupId>
      <artifactId>poi-ooxmlartifactId>
      <version>5.2.2version>
    dependency>

2、通过注解Bean的方式生成Excel

2.1、注解Bean准备

EasyExcel注解部分参考：EasyExcel注解大全_起一个让人印象深刻的名字的博客-CSDN博客

package com.dongzi.utils.excel.bean;

import com.alibaba.excel.annotation.ExcelIgnore;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.annotation.format.DateTimeFormat;
import com.alibaba.excel.annotation.write.style.*;
import com.alibaba.excel.enums.BooleanEnum;
import com.alibaba.excel.enums.poi.HorizontalAlignmentEnum;
import com.alibaba.excel.enums.poi.VerticalAlignmentEnum;
import lombok.Data;
import lombok.experimental.Accessors;

import java.util.Date;

@Data // lombok提供getter\setter等
@Accessors(chain = true) // lombok提供链式操作
@ContentRowHeight(25) // 行高
public class FillData {
   

    @HeadStyle(fillBackgroundColor = 4) // 表头样式设置，背景颜色填充，颜色类型4
    @HeadFontStyle(fontName = "宋体", fontHeightInPoints = 25, color = 3) // 表头字体设置，宋体，颜色3
    @ExcelProperty(value = "姓名") // 列名
    @ColumnWidth(20) // 列宽
    @ContentFontStyle(fontName = "宋体", color = 4, bold = BooleanEnum.TRUE) // 数据部分单元格字体样式
    @ContentStyle(horizontalAlignment = HorizontalAlignmentEnum.CENTER, verticalAlignment = VerticalAlignmentEnum.CENTER)
    // 数据部分单元格样式
    private String name; // 字段

    @HeadStyle(fillBackgroundColor = 4)
    @HeadFontStyle(fontName = "楷体", fontHeightInPoints = 25, color = 3)
    @ExcelProperty(value = "地址")
    @ColumnWidth(20)
    @ContentFontStyle(fontName = "楷体")
    @ContentStyle(horizontalAlignment = HorizontalAlignmentEnum.CENTER, verticalAlignment = VerticalAlignme