dataTables中显示按钮可以参考onCellRender中设置
要显示更多操作的按钮可以用popMenu组件

dataTables中通过按钮显示更多操作按钮具体实现如下:
在.w中放一个popMenu,在dataTables的onCellRender中控制列显示按钮,按钮的click事件中打开popMenu
如果要在操作按钮的事件中操作数据可以在model的构造函数中定义实例变量,在onCellRender事件中的按钮的click事件中获取到row和rowID赋值给实例变量
popMenu中按钮事件中通过实例变量去操作,代码如下:
1.popMenu的定义:

  <div component="$UI/system/components/justep/popMenu/popMenu" class="x-popMenu"
    direction="auto" xid="popMenu1" opacity="0"> 
    <div class="x-popMenu-overlay" xid="div8"/>  
    <ul component="$UI/system/components/justep/menu/menu" class="x-menu dropdown-menu x-popMenu-content"
      xid="menu1">
      <li class="x-menu-item" xid="item1"> 
        <a component="$UI/system/components/justep/button/button" class="btn btn-link"
          label="获取数据" xid="button7" onClick="button7Click"> 
          <i xid="i10"/>  
          <span xid="span15">获取数据</span>
        </a> 
      </li>  
      <li class="x-menu-item" xid="item2"> 
        <a component="$UI/system/components/justep/button/button" class="btn btn-link"
          label="删除数据" xid="button8" onClick="button8Click"> 
          <i xid="i11"/>  
          <span xid="span16">删除数据</span>
        </a> 
      </li>
    </ul>
  </div>

2.model的构造函数中定义实例变量:

	var Model = function() {
		this.callParent();
		this.row, this.rowID = "";
	};

3.dataTables的onCellRender事件中显示按钮,并定义按钮的click事件和传参:

	Model.prototype.listDataCellRender = function(event) {
		if (event.colName == 'relation0') {
			event.html = "<button class='btn btn-default btnDel' onclick='justep.Bind.contextFor(this).$model.optionData(event,event.row,\"" + event.rowID + "\")'>操作</button>";
		}
	};

4.click事件的调用的optionData函数的定义:

	Model.prototype.optionData = function(event, row, rowID) {
		//给实例变量赋值
		this.row = row;
		this.rowID = rowID;
		//打开popMenu
		var popMenu = this.comp("popMenu1");
		var dom = event.currentTarget;
		popMenu.set({
			'anchor' : dom
		});
		popMenu.show();
	};

5.popMenu中的按钮事件:

	Model.prototype.button7Click = function(event) {
		var data = this.comp("mainData");
		data.getValue("fCode", this.row);
	};
	Model.prototype.button8Click = function(event){
		var data = this.comp("mainData");
		data.deleteData(this.row);
	};