我正在尝试创建一个表单并通过@Valid在命令对象上验证其数据。验证效果很好,但返回网络时出现错误。
这就是我所拥有的:
的HTML
<div id="content" layout:fragment="contenido">
<div sec:authorize="isAnonymous()">
<form class="form-horizontal" action="#" th:action="@{register}" th:object="${userForm}" method="post">
<input type="hidden" name="_csrf" th:value="${_csrf.token}"/>
<fieldset>
<label for="alias" th:text="#{form.register.alias}">Alias</label>
<input id="alias" type="text" th:field="*{alias}" placeholder="Su alias" required="required" autofocus="autofocus"/>
<label for="pass" th:text="#{form.register.password}">Contraseña</label>
<input id="pass" type="password" th:field="*{password}" pattern="[\w\d-_]{5,15}" required="required" th:title="#{form.error.password}"/>
<p th:if="${#fields.hasErrors('password')}" th:errors="*{password}">Error en el dato ingresado</p>
<button type="submit" name="save" class="btn btn-primary" th:text="#{control.register}">Registrarme</button>
</fieldset>
</form>
</div>
</div>
控制者
@RequestMapping(value = "/register", params = {"save"}, method = RequestMethod.POST)
public String register (final ModelMap model, @Valid final UsuarioForm userForm, final BindingResult result) {
if (result.hasErrors()) {
return "register";
} else {
return "redirect:/" + HomeController.PAGE_NAME;
}
}
单击“提交”时,将调用“注册”方法,result.hasErrors()为true,因此应显示同一页面,但会发生此错误。
叠放
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'userForm' available as request attribute
org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:144)
org.thymeleaf.spring4.util.FieldUtils.getBindStatusFromParsedExpression(FieldUtils.java:396)
org.thymeleaf.spring4.util.FieldUtils.getBindStatus(FieldUtils.java:323)
org.thymeleaf.spring4.util.FieldUtils.getBindStatus(FieldUtils.java:289)
org.thymeleaf.spring4.processor.attr.AbstractSpringFieldAttrProcessor.processAttribute(AbstractSpringFieldAttrProcessor.java:98)
org.thymeleaf.processor.attr.AbstractAttrProcessor.doProcess(AbstractAttrProcessor.java:87)
org.thymeleaf.processor.AbstractProcessor.process(AbstractProcessor.java:212)
org.thymeleaf.dom.Node.applyNextProcessor(Node.java:1017)
org.thymeleaf.dom.Node.processNode(Node.java:972)
如果我以这种方式在控制器中将“ userForm”添加到模型中:
控制器修改
@RequestMapping(value = "/register", params = {"save"}, method = RequestMethod.POST)
public String register (final ModelMap model, @Valid final UsuarioForm userForm, final BindingResult result) {
if (result.hasErrors()) {
model.addAttribute("userForm", userForm); //THIS LINE IS ADDED
return "register";
} else {
return "redirect:/" + HomeController.PAGE_NAME;
}
}
错误消失了,但是... HTML${#fields.hasErrors('password')}
结果中的表达式为false,因此我无法向用户显示错误消息。
是否知道为什么会发生这种行为?提前致谢!
PS:我在Thymeleaf 2.1.4中使用Spring MVC 4.1.2
这个
public String register(final ModelMap model,
@Valid final UsuarioForm userForm,
final BindingResult result)
应该:
public String register(final ModelMap model,
@ModelAttribute("userForm") @Valid final UsuarioForm userForm,
final BindingResult result)
注意@ModelAttribute
注释。
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