导入相关POI maven

        <!--poi-->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>4.0.1</version>
        </dependency>

xls和xlsx获取图片方式是不同的所以判断一下后缀

            String type = file.getOriginalFilename();
            if (type.endsWith(".xls")){
              maplist = getPictures1((HSSFSheet) s);
            } if (type.endsWith(".xlsx")){
              maplist = getPictures2((XSSFSheet) s);
            }

获取图片和位置（xls）