var sheet = this.spread.getActiveSheet();
let columnCount = sheet.getColumnCount();
let rowCount = sheet.getRowCount();
for (let row = 0; row < rowCount; row++) {
for (let col = 0; col < columnCount; col++) {
/* 获取当前遍历单元格的值 */
let value = sheet.getValue(row, col);
console.log(value);
}
}