Question

我有一个spring MVC表单，它在POST时处理错误并在表单上正确显示它们（在同一页面上显示错误并且不清除表单中的数据）。我还想在成功交易时在表单上添加成功消息，并清除表单内容。

我对如何处理成功消息一无所知。我尝试将它作为错误传递给表单，但是它以红色显示，这是我用于错误的颜色。我无法将此消息的颜色更改为绿色。

         model.addAttribute("serverError", "Transaction inserted Successfully !"); 
     return "checkinout";

这是我的代码 -

.css

.plErroMessage{margin-left:185px;color:white;background-color:red;width:165px;padding: 4px;}

checkinout.jsp

<div class="devices">
    <form:form method="post" id="assetForm" modelAttribute="inOutTransaction" action="/DeviceManager/assets">
        <form:errors path="*" cssClass="plErroMessage" element="div" />
        <br>
        <c:if test="${not empty serverError}">
            <div id="serverError" class="plErroMessage">${serverError}</div>
        </c:if>
        <form:hidden path="actionId"/>
        <div>
            <div class="plLabelSearch">User Id:</div> 
            <div class="plinput"><form:input path="userId" size="29"/></div>
        </div>    <!-- More Code follows -->

控制器

    @RequestMapping(value="/assets", method = RequestMethod.POST)  
 public String checkInOut(@ModelAttribute("inOutTransaction") @Validated InOutTransaction inOutTransaction, BindingResult result, Model model, Locale locale) {
     try {
         if(result.hasErrors()){
             return "checkinout";
         }
         InOutTransactionDO inOutTransactionDO = new InOutTransactionDO();
/*CODE*/
         if(employeeInfoDO == null){
             model.addAttribute("serverError", "User "+ inOutTransaction.getUserId()+" does not exist !"); 
             return "checkinout";
         }
/*CODE*/
         if(deviceMasterDO == null){
             model.addAttribute("serverError", "Device Id "+ inOutTransaction.getAssetTagNumber()+" not found !"); 
             return "checkinout";           
         }
         inOutTransactionService.saveTransaction(inOutTransactionDO);
         model.addAttribute("serverError", "Transaction inserted Successfully !"); 
         return "checkinout";
          } catch (Exception e) {   
            model.addAttribute("serverError", e.toString()); 
            return "checkinout";  
          }
}

Answer 1

可能有更好的解决方案，但我过去一直想到这个。

1）在参数

中添加HttpServletRequest请求

@RequestMapping(value="/assets", method = RequestMethod.POST)  
public String checkInOut(@ModelAttribute("inOutTransaction") @Validated InOutTransaction inOutTransaction, 
BindingResult result, Model model, Locale locale, HttpServletRequest request) {
 try {
     if(result.hasErrors()){
         return "checkinout";
     }
     InOutTransactionDO inOutTransactionDO = new InOutTransactionDO();
/*CODE*/
     if(employeeInfoDO == null){
         model.addAttribute("serverError", "User "+ inOutTransaction.getUserId()+" does not exist !"); 
         return "checkinout";
     }
/*CODE*/
     if(deviceMasterDO == null){
         model.addAttribute("serverError", "Device Id "+ inOutTransaction.getAssetTagNumber()+" not found !"); 
         return "checkinout";           
     }
     inOutTransactionService.saveTransaction(inOutTransactionDO);
     request.getSession().setAttribute("successMessage", "Transaction inserted Successfully !"); 
     return "checkinout";
      } catch (Exception e) {   
        model.addAttribute("serverError", e.toString()); 
        return "checkinout";  
      }
}

2）将成功消息添加到jsp并在jsp

结束时清除会话变量

<div class="devices">
<form:form method="post" id="assetForm" modelAttribute="inOutTransaction" action="/DeviceManager/assets">
    <form:errors path="*" cssClass="plErroMessage" element="div" />
   <c:if test="${not empty successMessage}">
        <div id="serverError" class="successMessage">${successMessage}</div>
    </c:if>        
     <br>
    <c:if test="${not empty serverError}">
        <div id="serverError" class="plErroMessage">${serverError}</div>
    </c:if>
    <form:hidden path="actionId"/>
    <div>
        <div class="plLabelSearch">User Id:</div> 
        <div class="plinput"><form:input path="userId" size="29"/></div>
    </div>

 <c:remove var="successMessage" scope="session" />

3）为成功消息创建新的css

4）要在成功时清除表单，请重定向页面或将新的空白对象发送到视图。

我在httpSession而不是model中设置成功消息的原因是，默认情况下，spring会在重定向时将模型属性附加到url上。如果您不想重定向并想要发送空白对象，那么添加到model.addAttribute也没关系。

Spring MVC表单 - 添加成功消息和清晰表单

1 个答案: