springboot+jxls根据excel模板（类似于el表达式）导出excel

1.准备好excel模板

2.将准备好的excel模板放入项目中的resource文件夹中

3.添加Maven依赖

```xml
<!--jxls导出依赖jar包-->
<dependency>
    <groupId>net.sf.jxls</groupId>
    <artifactId>jxls-core</artifactId>
    <version>1.0.6</version>
    <scope>compile</scope>
</dependency>
<!--自动生成get、set以及构造函数等方法依赖jar包-->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.16.22</version>
</dependency>

4.写代码

4-1：准备导出的实体类

import java.util.Date;

public class User {
   
    private int id;
    private String name;
    private int age;
    private Date date;

    public int getId() {
   
        return id;
    }

    public void setId(int id) {