EasyUI DataGrid 多级表头设置

使用EasyUI做一个报表统计，需要合并表头为多级表头，核心代码如下:

$('#dg').datagrid({  
    url:'datagrid_data.action',  
    fit : true,
    fitColumns : false,
    columns:
         [
             [
                {"title":"网格员考核测评表","colspan":9}
             ],
             [
                {"field":"ORGNAME","title":"网格","rowspan":3,width:"80"},
                {"field":"USERZH","title":"网格员","rowspan":3,width:"80"},
                {"title":"工作纪律","rowspan":2},
                {"title":"民主互评","rowspan":2},
                {"title":"志愿者","rowspan":2},
                {"title":"加分项","colspan":2},
                {"title":"总分","rowspan":2},
                {"title":"平均分","rowspan":2}
             ],
             [
                {"title":"信息上报","rowspan":1},
                {"title":"简报采纳","rowspan":1}
             ],
             [
                {"field":"YW1","title":"5分","rowspan":1},
                {"field":"YW2","title":"5分","rowspan":1},
                {"field":"YW3","title":"6分","rowspan":1},
                {"field":"YW4","title":"8分","rowspan":1},
                {"field":"YW5","title":"5分","rowspan":1},
                {"field":"TOTAL","title":"","rowspan":1},
                {"field":"AVG","title":"","rowspan":1}
             ]
         ]
}); 

效果如图：

从以上代码和图中可以看出表头共有4行9列, 画单元格就和HTML中一样，主要利用 rowspan、colspan 属性

在将要显示内容的列上添加 field 属性