HuTool工具封装类ExcelUtilExcel操作工具封装类1.从文件中读取Excel为ExcelReaderExcelReader reader = ExcelUtil.getReader(FileUtil.file("test.xlsx"));2.从流中读取Excel为ExcelReader（比如从ClassPath中读取Excel文件）ExcelReader reader = ExcelUtil.getReader(ResourceUtil.getStream("aaa.xlsx"));3.读取指定的sheetExcelReader reader;//通过sheet编号获取reader = ExcelUtil.getReader(FileUtil.file("test.xlsx"), 0);//通过sheet名获取reader = ExcelUtil.getReader(FileUtil.file("test.xlsx"), "sheet1");4.读取大数据量的Excelprivate RowHandler createRowHandler() { return new RowHandler() { @Override public void handle(int sheetIndex, int rowIndex, List<Object> rowlist) { Console.log("[{}] [{}] {}", sheetIndex, rowIndex, rowlist); } };}ExcelUtil.readBySax("aaa.xlsx", 0, createRowHandler());