EasyUI 动态生成列

        //查询方法
        function query_() {
            var params=xxx;
            var url = "xxxajaxList.do";
            $.post(url,params,showGrid, "json");
        }
        //处理返回结果，并显示数据表格
        function showGrid(data) {
            if (data.data[0].rows.length == 0) {
                $.messager.show({
                    title:'结果',
                    msg:'没有数据!',
                    showType:'slide'
                });
            }
            var options = {
                rownumbers: true,
                fit:true
            };
            options.columns = eval(data.columns);//把返回的数组字符串转为对象，并赋于datagrid的column属性
            dataGrid.datagrid(options);//根据配置选项，生成datagrid
            var p = $('#datagrid').datagrid('getPager');
            $(p).pagination({
                pageNumber:data.data[0].pageNumber,
                pageSize:data.data[0].pageSize,
                onSelectPage:function(pageNumber, pageSize){
                    $(this).pagination('loading');
                    pagerChange(pageNumber,pageSize);
                    $(this).pagination('loaded');
                },
                onChangePageSize:function(pageNumber,pageSize){
                    $(this).pagination('loading');
                    pagerChange(pageNumber,pageSize);
                    $(this).pagination('loaded');
                }
            });
            dataGrid.datagrid("loadData", eval(data.data[0])); //载入本地json格式的数据
        }
        function pagerChange(pageNumber,pageSize){
            imonKCI.showZone();
            $("#datagrid_page").val(pageNumber);
            $("#datagrid_rows").val(pageSize);
            query_();
            imonKCI.hideZone();
        }

<input type="hidden" name="page" id="datagrid_page" value="1">
<input type="hidden" name="rows" id="datagrid_rows" value="10">
...
<table id="datagrid" width="100%"></table>

转换后的JSON：
{"columns":[[
{"field":"taskName","title":"名称","align":"center","width":"100"},{"field":"kpScope","title":"范围","align":"center","width":"100"},
{"field":"中文","title":"中文","align":"center","width":"100"}]],
"data":[{"pageSize":10,"pageNumber":1,"total":1,"rows":[{"id":"661","taskName":"xxx","kpScope":"xx","中文":"xx"}]}]}

public class DataGridColumn {
    private String field;
    private String title;
    private String align="center";
    private String width="100";
...
}


List<DataGridColumn> columns=new ArrayList<DataGridColumn>();
columns.add(new DataGridColumn("taskName","名称"));
columns.add(new DataGridColumn("kpScope","范围"));

String result="{\"columns\":["+JsonUtil.bean2json(columns)+"],\"data\":[{\"pageSize\":"+rows+",\"pageNumber\":"+page+",\"total\":"+list.size()+",\"rows\":["+rowStr+"]}]}";