需求如下

因为系统生成的范围查询，日期没有增加限制，需要结束日期不能高于开始日期，故而重写查询功能，当然也支持下拉框重写，三级联动等，逻辑删除显示功能。

新增，导出按钮都需要重写，后台也需要对应的修改。

代码如下

从下开始到

 <div region="center" style="padding:0px;border:0px">
 <t:datagrid>

重写查询

将默认查询：query="true"移除，将<t:datagrid name="mdCustomerList" checkbox="true" pagination="true" fitColumns="false" title="客户信息"，中的name给替换到下面的位置。

        <!-- 操作按钮及查询 -->
        <div id="mdCustomerListtb">
            <div align="right">
                <!-- 查询操作 -->
                <table style="width: 100%;border-collapse: collapse;border-bottom: 1.5px solid #E6E6E6;" cellpadding="0"
                       cellspacing="1" class="formtable">
                    <table style="width: 100%;" cellpadding="0" cellspacing="1"
                           class="formtable">
                        <tr>


                            <td align="right" style="width:30px;background-color: white;">
                                <label>
                                    客户类别:
                                </label>
                            </td>
                            <td class="value" style="width:15%;">
                                <t:dictSelect id="customerCategory" field="customerCategory" type="list"
                                              typeGroupCode="custom" hasLabel="false" title="客户类别"></t:dictSelect>
                            </td>
                            <td align="right" style="width:30px;background-color: white;">
                                <label>
                                    客户名:
                                </label>
                            </td>
                            <td class="value" style="width: 16%">
                                <input id="name" name="name" type="text" style="width: 90%"
                                       class="inputxt" ignore="ignore"/>
                            </td>
                            <td align="right" style="width:30px;background-color: white;">
                                <label>
                                    系统标题:
                                </label>
                            </td>
                            <td class="value" style="width:15%;">
                                <input id="systemTitle" name="systemTitle" type="text" style="width: 90%"
                                       class="inputxt" ignore="ignore"/>
                            </td>

                            <td align="right" style="width:30px;background-color: white;">
                                <label>
                                    截止日期:
                                </label>
                            </td>
                            <td class="value" style="width: 20%"><input id="deadlineTime_begin" name="deadlineTime_begin"
                                                                       type="text" style="width: 45%" class="Wdate"
                                                                       onClick="WdatePicker({maxDate: $('#deadlineTime_end').val() })"
                                                                       ignore="ignore"/>
                                <input id="deadlineTime_end" name="deadlineTime_end"
                                       type="text" style="width: 45%" class="Wdate"
                                       onClick="WdatePicker({minDate: $('#deadlineTime_begin').val() })"
                                       ignore="ignore"/>
                            </td>

                            <td class="value" style="width: 5%">
                                <a href="#" class="easyui-linkbutton" style="width: 100%;" iconCls="icon-search"
                                   onclick="mdCustomerListsearch()">查询</a>
                            </td>
                            <td class="value" style="width: 10%">
                                <a href="#" class="easyui-linkbutton" style="width: 40%;" iconCls="icon-reload"
                                   onclick="resetSearch()">重置</a>
                            </td>
                        </tr>

                        <%--<tr>--%>
                            <%--<td align="right" style="width:30px;background-color: white;">--%>
                                <%--<label>--%>
                                    <%--截止日期:--%>
                                <%--</label>--%>
                            <%--</td>--%>
                            <%--<td class="value" style="width: 5%"><input id="deadlineTime_begin" name="deadlineTime_begin"--%>
                                                                       <%--type="text" style="width: 45%" class="Wdate"--%>
                                                                       <%--onClick="WdatePicker({maxDate: $('#deadlineTime_end').val() })"--%>
                                                                       <%--ignore="ignore"/>--%>
                                <%--<input id="deadlineTime_end" name="deadlineTime_end"--%>
                                       <%--type="text" style="width: 45%" class="Wdate"--%>
                                       <%--onClick="WdatePicker({minDate: $('#deadlineTime_begin').val() })"--%>
                                       <%--ignore="ignore"/>--%>
                            <%--</td>--%>
                        <%--</tr>--%>

                        <tr>
                            <td class="value" style="width: 5%">
                                <a href="#" class="easyui-linkbutton" plain="true" icon="icon-add"
                                   onclick="add('新增','mdCustomerController.do?goAdd','mdCustomerList')">新增</a>
                            </td>

                            <td class="value" style="width: 10%">
                                <a href="#" class="easyui-linkbutton" style="width: 40%;" plain="true" icon="icon-putout"
                                   onclick="ExportXls()">导出</a>
                            </td>
                        </tr>


                    </table>
                </table>
            </div>
        </div>

重置按钮

//清空查询条件
    function resetSearch() {
        searchReset('mdCustomerList');
    }

后台查询

 @RequestMapping(params = "datagrid")
    public void datagrid(MdCustomerEntity mdCustomer, HttpServletRequest request, HttpServletResponse response, DataGrid dataGrid) {
        //增加模糊查询
        if (StringUtils.isNotBlank(mdCustomer.getName())) {
            mdCustomer.setName("*" + mdCustomer.getName() + "*");
        }

        CriteriaQuery cq = new CriteriaQuery(MdCustomerEntity.class, dataGrid);
        //查询条件组装器
        org.jeecgframework.core.extend.hqlsearch.HqlGenerateUtil.installHql(cq, mdCustomer, request.getParameterMap());
        try {
            //自定义追加查询条件
            cq.eq("deleteFlag", 0);
            String query_deadlineTime_begin = request.getParameter("deadlineTime_begin");
            String query_deadlineTime_end = request.getParameter("deadlineTime_end");
            if (StringUtil.isNotEmpty(query_deadlineTime_begin)) {
                cq.ge("deadlineTime", new SimpleDateFormat("yyyy-MM-dd").parse(query_deadlineTime_begin));
            }
            if (StringUtil.isNotEmpty(query_deadlineTime_end)) {
                cq.le("deadlineTime", new SimpleDateFormat("yyyy-MM-dd").parse(query_deadlineTime_end));
            }
        } catch (Exception e) {
            throw new BusinessException(e.getMessage());
        }
        cq.add();
        this.mdCustomerService.getDataGridReturn(cq, true);
        TagUtil.datagrid(response, dataGrid);
    }