jqgrid 表格内 图片展示

colModel :

{name:'picture',align:'center',editable: true,formatter:showPicture,edittype:'file',
    editoptions:{enctype:"multipart/form-data"}}

function :

function showPicture(cellvalue){
    return "<img src='${pageContext.request.contextPath}/img/" +cellvalue + "' height='100' width='100'/>";
}