poi excel 相关

一、poi excel    分组（group）

sheet.groupRow(1, 3);

ungroupRow（xxx，xxx）; 

 Workbook wb = new HSSFWorkbook();
    Sheet sheet1 = wb.createSheet("new sheet");
    sheet1.groupRow( 5, 14 );
    sheet1.groupColumn( (short)4, (short)7 );

    //To collapse (or expand) an outline use the following calls:
    //大致翻译就是：用如下的调用折叠或展开一个边框
    sheet1.setRowGroupCollapsed( 7, true );
    sheet1.setColumnGroupCollapsed( (short)4, true );