1 spread.suspendPaint();
 2 var sheetJson = JSON.stringify(spread2.getSheet(0).toJSON());
 3 var index = spread.getSheetCount();
 4 spread.addSheet(index);
 5 spread.getSheet(index).fromJSON(JSON.parse(sheetJson));
 6 spread.getSheet(index).name("更改sheet名字" + index);
 7 //拷贝样式
 8 spread2.getNamedStyles().forEach(function (namedStyle) {
 9  spread.addNamedStyle(namedStyle);
10 })
11 spread.resumePaint();