1.导入依赖

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>easyexcel</artifactId>
    <version>3.0.1</version>
</dependency>

2.代码实现

package com.jiayou.peis.manage.biz.cotroller;

import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.write.metadata.WriteSheet;
import org.apache.commons.io.IOUtils;
import org.springframework.core.io.ClassPathResource;

import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;

public class Test {

    public static void main(String[] args) {
        export();
    }

    private static void export() {
        ExcelWriter excelWriter = null;
        InputStream templateInputStream = null;

        Map<String, Object> map = new HashMap<>();
        map.put("name", "张三");
        map.put("sex", "男");
        map.put("age", "20");
        try {
            //获取项目resources/template目录下模板的数据流
            templateInputStream = new ClassPathResource("template/data_template.xlsx").getInputStream();
            if (templateInputStream.available() == 0) {
                log.error("获取模板失败");
            }
            //设置文件名，filePath导出路径: D盘目录
            String fileName = "测试报告" + System.currentTimeMillis() + ".xlsx";
            String path = "D:\\";
            String filePath = path + fileName;
            //ExcelWriter通过POI将值写入Excel
            excelWriter = EasyExcel.write(filePath).withTemplate(templateInputStream).build();
            // sheet-概览
            WriteSheet firstSheet = EasyExcel.writerSheet(0).build();
            //用数据去填充模板 取对应的值显示在模板对应的位置
            excelWriter.fill(map, firstSheet);
        } catch (IOException e) {
            log.error("获取模板：examreport 失败。");
            e.printStackTrace();
        } finally {
            //最后记得关闭流
            excelWriter.finish();
            IOUtils.closeQuietly(templateInputStream);
        }
    }
}