在 Freemarker 模板中显示 Spring MVC 验证错误 [英] Displaying Spring MVC validation errors in Freemarker templates
问题描述
如果控制器返回绑定错误,我会尝试在我的 freemarker 模板中显示全局验证错误列表.我可以显示与字段关联的错误,但我想检测特定 bean 中何时发生错误并在页面顶部显示一条消息.我试过使用下面的例子,它不产生任何输出:
<@spring.bind "webPage"/>....<#if spring.status.error>您输入的数据有问题:<ul><#list spring.status.errorMessages as error><li>${error?html}</li></#list></#if>
下面的行总是返回 0,尽管提交的表单有错误:
${spring.status.errorMessages?size}
我的控制器代码如下:
@RequestMapping(method = RequestMethod.POST)public ModelAndView save(@ModelAttribute("webPage") @Valid WebPage page, BindingResult 结果, Model model) {如果(!model.containsAttribute(站点")){throw new IllegalArgumentException("模型必须包含站点属性.");}Site site = (Site) model.asMap().get("site");如果 (!result.hasErrors() && !page.isNew()) {this.pageService.save(page, site);} else if (!result.hasErrors() && page.isNew()) {this.pageService.create(page, site);}返回 createMav(result);}
createMav 方法如下:
public ModelAndView createMav(BindingResult result) {ModelAndView mav = new ModelAndView();mav.setViewName(getPrimaryControllerView());mav.addAllObjects(result.getModel());返回 mav;}
有没有办法使用 Freemarker + Spring MVC 来实现这一点?
我找到了一种使用标准 MVC JSP 标记库的迂回方法来做到这一点.我将其提供给 Freemarker:
<#assign form=JspTaglibs["http://www.springframework.org/tags/form"]/>
然后我使用以下宏来显示全局错误消息:
<#macro formErrors><#assign formErrors><@form.errors path="*"/></#assign><#if formErrors?has_content><div id="错误"><@spring.message "admin.error.globalMessage"/>
</#if></#macro>
我只是将以下行放在我希望出现此错误消息的地方(这必须包含在提交给控制器的表单元素中):
<@form.form method="POST" commandName="webPage"><@formErrors/>....</@form.form>
I'm trying to display a list of global validation errors in my freemarker template if a controller returns binding errors. I can display errors that are associated with a field, but I want to detect when an error has occurred within a specific bean and display a message at the top of the page. I've tried using the example below which produces no output:
<@spring.bind "webPage" />
....
<#if spring.status.error>
There were problems with the data you entered:
<ul>
<#list spring.status.errorMessages as error>
<li>${error?html}</li>
</#list>
</ul>
</#if>
The line below always returns 0, despite there being errors with the submitted form:
${spring.status.errorMessages?size}
My controller code is below:
@RequestMapping(method = RequestMethod.POST)
public ModelAndView save(@ModelAttribute("webPage") @Valid WebPage page, BindingResult result, Model model) {
if (!model.containsAttribute("site")) {
throw new IllegalArgumentException("Model must contain site attribute.");
}
Site site = (Site) model.asMap().get("site");
if (!result.hasErrors() && !page.isNew()) {
this.pageService.save(page, site);
} else if (!result.hasErrors() && page.isNew()) {
this.pageService.create(page, site);
}
return createMav(result);
}
The createMav method is below:
public ModelAndView createMav(BindingResult result) {
ModelAndView mav = new ModelAndView();
mav.setViewName(getPrimaryControllerView());
mav.addAllObjects(result.getModel());
return mav;
}
Is there a way to achieve this using Freemarker + Spring MVC?
I found a roundabout way to do this using the standard MVC JSP taglib. I make this available to Freemarker:
<#assign form=JspTaglibs["http://www.springframework.org/tags/form"] />
I then use the following macro to display global error message:
<#macro formErrors>
<#assign formErrors><@form.errors path="*" /></#assign>
<#if formErrors?has_content>
<div id="errors">
<@spring.message "admin.error.globalMessage" />
</div>
</#if>
</#macro>
I just place the following line where ever I want this error message to appear (this has to be contained within the form element that submits to the controller):
<@form.form method="POST" commandName="webPage">
<@formErrors />
....
</@form.form>
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