使用阿里巴巴的EasyExcel操作Excel

1. 引入依赖

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
        </dependency>

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
        </dependency>
	 <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>easyexcel</artifactId>
            <version>2.1.1</version>
        </dependency>

1. 创建测试的数据类DemoData

@Data
public class DemoData {
    //设置excel表头名称
    @ExcelProperty(value = "学生编号",index = 0)
    private Integer sno;
    @ExcelProperty(value = "学生姓名",index = 1)
    private String sname;
}

1. 创建ExcelListener类

public class ExcelListener extends AnalysisEventListener<DemoData> {
    //一行一行读取excel内容
    @Override
    public void invoke(DemoData data, AnalysisContext analysisContext) {
        System.out.println("****"+data);
    }
    //读取表头内容
    @Override
    public void invokeHeadMap(Map<Integer, String> headMap, AnalysisContext context) {
        System.out.println("表头："+headMap);
    }
    //读取完成之后
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) { }
}

1. 进行测试

public class TestEasyExcel {

    public static void main(String[] args) {
        //实现excel写的操作
        //1 设置写入文件夹地址和excel文件名称
       // String filename = "F:/Download/write.xlsx";
        //2 调用easyexcel里面的方法实现写操作
        //write方法两个参数：第一个参数文件路径名称，第二个参数实体类class
       // EasyExcel.write(filename,DemoData.class).sheet("学生列表").doWrite(getData());


        //实现excel读操作
        String filename = "F:/Download/write.xlsx";
        EasyExcel.read(filename,DemoData.class,new ExcelListener()).sheet().doRead();
    }

    //创建方法返回list集合
    private static List<DemoData> getData() {
        List<DemoData> list = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            DemoData data = new DemoData();
            data.setSno(i);
            data.setSname("lucy"+i);
            list.add(data);
        }
        return list;
    }
}