EasyExcel实现读写Excel文件的示例代码

<dependencies>
    <!-- https://mvnrepository.com/artifact/com.alibaba/easyexcel -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>easyexcel</artifactId>
        <version>2.1.1</version>
    </dependency>
</dependencies>

@Data
public class User {
    //设置表头名称
    @ExcelProperty(value = "用户编号")
    private int id;

    //设置表头名称
    @ExcelProperty(value = "用户名称")
    private String name;
}

public class TestWrite {
    public static void main(String[] args) {
        //设置文件名称和路径
        String fileName="I:\\temp\\ggkt\\test.xlsx";
        //调用方法
        EasyExcel.write(fileName,User.class)
                .sheet("写操作")
                .doWrite(data());
    }

    //循环设置要添加的数据，最终封装到list集合中
    private static List<User> data() {
        List<User> list = new ArrayList<User>();
        for (int i = 0; i < 10; i++) {
            User data = new User();
            data.setId(i);
            data.setName("lucy"+i);
            list.add(data);
        }
        return list;
    }
}

@Data
public class User {
    //设置表头名称
    //设置列对应的属性
    @ExcelProperty(value = "用户编号",index = 0)
    private int id;

    //设置表头名称
    //设置列对应的属性
    @ExcelProperty(value = "用户名称",index = 1)
    private String name;
}

package com.atguigu.excel;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;

import java.util.Map;

public class ExcelListener extends AnalysisEventListener<User> {

    //一行一行读取excel内容，把每行内容封装到User对象中
    //从excel第二行还是读取(第一行是表头)
    @Override
    public void invoke(User user, AnalysisContext context) {
        System.out.println(user);
    }
    //读取excel表头信息
    @Override
    public void invokeHeadMap(Map<Integer, String> headMap, AnalysisContext context) {
        System.out.println("表头："+headMap);

    }
    //读取完成后执行
    @Override
    public void doAfterAllAnalysed(AnalysisContext context) {

    }
}

import com.alibaba.excel.EasyExcel;

public class TestRead {
    public static void main(String[] args) {
        //设置文件名称和路径
        String fileName="I:\\temp\\ggkt\\test.xlsx";
        //调用方法进行读操作
        EasyExcel.read(fileName,User.class,new ExcelListener())
                .sheet()
                .doRead();
    }
}