一、实现EasyExcel对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();
}