用valiudation来验证输入框的输入项目为必填项目

1、在editDistributorPrice.jsp页面中

<link href="css/common.css" rel="stylesheet">   这句代码是用来引用一个样式，让输入框没有填写内容是变红

 <div> <ul class="breadcrumb">

                        <li><a href="#">首页</a></li>

                        <li><a href="#">修改终端价格</a></li>    </ul> </div>

  <div class="row">      <div class="box col-md-12">

                 <div class="box-inner">

                            <div class="box-header well" data-original-title="">      <h2>

                                    <i class="glyphicon glyphicon-edit"></i> 终端价格</h2>

     <div class="box-icon">   <a href="#" class="btn btn-setting btn-round btn-default">

<i    class="glyphicon glyphicon-cog"></i></a> <a href="#"   class="btn btn-minimize btn-round btn-default">

<i class="glyphicon glyphicon-chevron-up"></i></a> <a href="#"class="btn btn-close btn-round btn-default">

<i  class="glyphicon glyphicon-remove"></i></a>      </div>  </div>

   <div class="box-content">

  <form:form modelAttribute="distributorPriceForm" action="editDistributorPrice" method="post">

<form:hidden path="commodityId" value="${distributorPriceForm.commodityId}" />

<form:hidden path="distributorPriceId" value="${distributorPriceForm.distributorPriceId}" />

关键代码 ：判断错误信息 <div class="alert alert-info">${message}<form:errors path="*"></form:errors></div>

<table class="table table-bordered responsive"><tr>

<td style="background-color: #f9f9f9;">商品名称</td>

<td>${distributorPriceForm.commodityName}</td>

<td style="background-color: #f9f9f9;">指导价</td>

<td>${distributorPriceForm.guidePrice}</td>

<td style="background-color: #f9f9f9;">终端价<span style="color:red">*</span></td>

关键代码：使用css <td><form:input path="retailPrice" cssClass="form-control" cssErrorClass="form-control error" value="${distributorPriceForm.retailPrice}"/></td></tr>  </table>

<div class="input-group has-success col-md-12" align="right">

<button type="submit" class="btn btn-success">提 交</button> &nbsp;&nbsp;&nbsp;&nbsp;

关键代码：给<a href="initDistributorPriceEdit" class="btn btn-danger">取 消</a></div> </form:form>

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

2、在DistributorPriceController.java

   @RequestMapping(value = "initEditDistributorPrice", method = RequestMethod.GET)

    public String initEditDistributorPrice(Model model, HttpSession session, DistributorPriceForm distributorPriceForm) {

    log.info("修改分销商价格初始化");

    UVO uvo = (UVO)session.getAttribute("UVO");

    distributorPriceForm.setDistributorId(uvo.getUserId());

    model.addAttribute("distributorPriceForm", distributorPriceService.searchDistributorPrice(distributorPriceForm));

        return "manager/distributorPrice/editDistributorPrice";   从这里可以看出是调用的那个方法，返回到自己想要的页面

    }

    

    @RequestMapping(value = "editDistributorPrice", method = RequestMethod.POST)

    public String executeEditDistributorPrice(Model model, HttpSession session, @Valid @ModelAttribute("distributorPriceForm") DistributorPriceForm distributorPriceForm,BindingResult results) throws SQLException {     利用validation的关键代码

     if(results.hasErrors())

    {

    log.info("修改分销商价格");

    model.addAttribute("message", "请输入修改价格");                     输入框是否为空的关键代码

    return "manager/distributorPrice/editDistributorPrice";

    }

  3、在DistributorPriceForm.java中

@NotEmpty(field="终端价",  message="{errors.required}")            输出一个错误信息

private String retailPrice;

  

转载于:https://my.oschina.net/u/2411775/blog/484332