Spring MVC and Error 400: SRVE0295E

Question

我有一个简单的MVC应用程序的问题。

dayoff.html
<div id="dayoff_operations" class="big_box_1">
    <form:form modelAttribute="dayOff" enctype="multipart/form-data" action="/dayoff.html" >
        <div style="width: 50%; float: left; margin-top: 0px ">
            <form:label path="forDate" ><spring:message code="dayoff.fordate.label"/></form:label>
            <form:input path="ax_forDate" id="datepicker" style="width:65px" readonly="readonly"/>&nbsp;&nbsp;
        </div>
        <div style="width: 50%; float: right; margin-top: 0px ">
            <form:label path="toDate" ><spring:message code="dayoff.todate.label"/></form:label>
            <form:input path="ax_toDate" id="datepicker2" style="width:65px" readonly="readonly" />&nbsp;&nbsp;
        </div>
        <div style="float: left">
            <form:select cssClass="more" path="dayofftype" items="${dayoffTypes.list}" itemLabel="label" itemValue="value" htmlEscape="false" cssErrorClass="errorsField"/>
            <form:errors path="dayofftype" cssClass="errors"/>
        </div>
        <input type="submit" name="add" value="Add"/>
    </form:form>

这是我的控制器:

@Controller
@RequestMapping("/dayoff")
@SessionAttributes(types = {DayOff.class})
public class DaysOffController {
private Validator validator;
@Autowired
private ReloadableResourceBundleMessageSource messages;
@ModelAttribute("dayoffTypes")
public Map<String, Object> populateDayoffTypes(Locale locale) {
    return Utils.createComboMap(DayoffType.values(), messages, locale);
}
@RequestMapping(method = RequestMethod.GET)
public String setupForm(Model model) {      
    model.addAttribute("dayOff", new DayOff());
    model.addAttribute("cur_period",SessionManager.getCurrentPeriod());
    return "dayoff";
}
@RequestMapping(method = RequestMethod.POST, params = "add")
public String addNewHoliday(@ModelAttribute DayOff dayOff, BindingResult result, ModelMap model) {
    System.out.println("AAA");
    return "/dayoff";
}

当我点击添加按钮错误400:SRVE0295E:错误报告:400出现时，服务器控制台没有信息。我认为它与setupForm()方法有关，该方法显示表单并将其粉碎以供将来提交。你能给我指点一下吗?

Answer 1

错误400:SRVE0295E也发生在MVC不能用HTML表单中的值填充@ModelAttribute Form时。

例如:

• 类Form具有原始属性int someCount
• 你的HTML表单有<input>分配值给这个基本属性
• 用户为<input>输入空值(null)

您不应该使用诸如int、boolean、float等基本类型

Answer 2

setupForm和addnewholday的返回语句是不同的。我假定您希望从两者返回相同的视图名。如您所见，为了提交表单，我假设"/dayoff"的addNewHoliday返回值实际上应该是"dayoff"