Excel读操作

1、创建实体类

import com.alibaba.excel.annotation.ExcelProperty;
public class ReadData {
    //设置列对应的属性
    @ExcelProperty(index = 0)
    private int sid;
    
    //设置列对应的属性
    @ExcelProperty(index = 1)
    private String sname;
​
    public int getSid() {
        return sid;
    }
    public void setSid(int sid) {
        this.sid = sid;
    }
    public String getSname() {
        return sname;
    }
    public void setSname(String sname) {
        this.sname = sname;
    }
    @Override
    public String toString() {
        return "ReadData{" +
                "sid=" + sid +
                ", sname='" + sname + '\'' +
                '}';
    }
}

2、创建读取操作的监听器

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.exception.ExcelDataConvertException;
import com.sun.scenario.effect.impl.sw.sse.SSEBlend_SRC_OUTPeer;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
​
//创建读取excel监听器
public class ExcelListener extends AnalysisEventListener<ReadData> {
​
    //创建list集合封装最终的数据
    List<ReadData> list = new ArrayList<ReadData>();
​
    //一行一行去读取excle内容
    @Override
    public void invoke(ReadData user, AnalysisContext analysisContext) {
       System.out.println("***"+user);
        list.add(user);
    }
​
    //读取excel表头信息
    @Override
    public void invokeHeadMap(Map<Integer, String> headMap, AnalysisContext context) {
        System.out.println("表头信息："+headMap);
    }
​
    //读取完成后执行
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
    }
}

3、调用实现最终的读取

public static void main(String[] args) throws Exception {
​
        // 写法1：
        String fileName = "F:\\01.xlsx";
        // 这里 需要指定读用哪个class去读，然后读取第一个sheet 文件流会自动关闭
        EasyExcel.read(fileName, ReadData.class, new ExcelListener()).sheet().doRead();
​
        // 写法2：
        InputStream in = new BufferedInputStream(new FileInputStream("F:\\01.xlsx"));
        ExcelReader excelReader = EasyExcel.read(in, ReadData.class, new ExcelListener()).build();
        ReadSheet readSheet = EasyExcel.readSheet(0).build();
        excelReader.read(readSheet);
        // 这里千万别忘记关闭，读的时候会创建临时文件，到时磁盘会崩的
        excelReader.finish();
}