Question

我在spring 3 mvc应用程序中遇到表单验证问题。

似乎所有内容都已设置好，但是当表单字段中存在错误条目时，验证程序会检测到错误条目，并且不会显示任何错误消息。

这是验证器

@Component
public class SettingsValidator implements Validator{

@Override
public boolean supports(Class<?> clazz) {
    return VrSettings.class.isAssignableFrom(clazz);
}

@Override
public void validate(Object target, Errors errors) {

    ValidationUtils.rejectIfEmpty(errors, "applicationBaseUri", "field.required", "field required");
    ValidationUtils.rejectIfEmpty(errors, "remoteDnsServiceUri","field.required", "field required");

    VrSettings settings = (VrSettings) target;
    try
    {
        URI uri = new URI(settings.getApplicationBaseUri());
    }
    catch (URISyntaxException e)
    {
        errors.rejectValue("applicationBaseUri", "error.invalid.uri", "invalid uri");
    }
    try
    {
        URI uri = new URI(settings.getLocalApplicationBaseURI());
    }
    catch (URISyntaxException e)
    {
        errors.rejectValue("localApplicationBaseURI", "error.invalid.uri", "invalid uri");
    }
    try
    {
        URI uri = new URI(settings.getRemoteDnsServiceUri());
    }
    catch (URISyntaxException e)
    {
        errors.rejectValue("remoteDnsServiceUri", "error.invalid.uri", "invalid uri");
    }

}

}

控制器......

@Controller
public class UserInterfaceController {

@InitBinder
protected void initBinder(WebDataBinder binder)
{
    binder.setValidator(new SettingsValidator());
}


@RequestMapping(method=RequestMethod.POST, value="ui/settings")
public ModelAndView postSettings(@ModelAttribute("settings") @Valid VrSettings settings, BindingResult result)
{
    ModelAndView mav = new ModelAndView("settings");
    mav.addObject("settings", settings);
    if(result.hasErrors())
    {
        mav.addAllObjects(result.getModel());
        return mav;
    }

    LinkedList<VrSettings> vrSettingsList = persistenceManager.getAll(new VrSettings());
    if(vrSettingsList.isEmpty())
    {
        //do things
    }
    else
    {
               //do things
    }

    return mav;
}

}

最后是JSP

<%@ taglib uri="http://www.springframework.org/tags" prefix="spring"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>

    <h3>Configuration Parameters</h3>

        <span style="font-weight:bold; color: red">
            <form:errors path="*" />
       </span><br />
    <div class="form">
    <form:form method="post" action="settings" commandName="settings">

            <form:label for="baseuri" path="applicationBaseUri">base URI*</form:label>
            <form:input class="text" path="applicationBaseUri" size="35" name="baseuri"/>

            <form:label for="localbaseuri" path="localApplicationBaseURI">local base URI</form:label>
            <form:input class="text" path="localApplicationBaseURI" size="35" name="localbaseuri"/>

            <form:label for="ldns" path="remoteDnsServiceUri">ldns URI*</form:label>
            <form:input class="text" path="remoteDnsServiceUri" size="35" name="ldns"/>

            <div class="form-row">
                <input type="submit" value="submit"/>
            </div>

    </form:form>
    </div>

</body>

我无法理解我所缺少的东西。感谢任何帮助，提前谢谢！

Answer 1

<form:errors path="*" />

需要知道它应该对哪个命令对象进行操作。所以将此标记移到

中

<form:form method="post" action="settings" commandName="settings">

如果没有这个，org.springframework.web.servlet.tags.form.AbstractHtmlElementBodyTag.shouldRender()的方法org.springframework.web.servlet.tags.form.ErrorsTag只会返回SKIP_BODY，因为它无法为您的命令对象找到BindingResult。

Spring 3形成验证器

1 个答案: