Java Spring3表单验证器_Java_Spring_Jsp_Spring Mvc_Validation

Java Spring3表单验证器

java spring jsp spring-mvc validation

Java Spring3表单验证器,java,spring,jsp,spring-mvc,validation,Java,Spring,Jsp,Spring Mvc,Validation,我在Spring3MVC应用程序中遇到了表单验证问题 <h3>Configuration Parameters</h3> <span style="font-weight:bold; color: red"> <form:errors path="*" /> </span><br /> <div class="form"> <f

我在Spring3MVC应用程序中遇到了表单验证问题

    <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>

看起来一切都设置好了，但当表单字段中插入错误条目时，验证程序会检测到它，并且不会显示错误消息

    <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>

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");
    }

}

    <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>

@组件
公共类设置验证程序实现验证程序{
@凌驾
公共布尔支持（类clazz）{
返回VrSettings.class.isAssignableFrom（clazz）；
}
@凌驾
公共无效验证（对象目标、错误）{
ValidationUtils.rejectIfEmpty（错误，“applicationBaseUri”、“field.required”、“field required”）；
ValidationUtils.rejectIfEmpty（错误，“remoteDnsServiceUri”、“field.required”、“field required”）；
VrSettings=（VrSettings）目标；
尝试
{
URI=新URI（settings.getApplicationBaseUri（））；
}
捕获（URISyntaxException e）
{
errors.rejectValue（“applicationBaseUri”、“error.invalid.uri”、“invalid uri”）；
}
尝试
{
URI=新URI（settings.getLocalApplicationBaseURI（））；
}
捕获（URISyntaxException e）
{
errors.rejectValue（“localApplicationBaseURI”、“error.invalid.uri”、“invalid uri”）；
}
尝试
{
URI=新URI（settings.getRemoteDnsServiceUri（））；
}
捕获（URISyntaxException e）
{
errors.rejectValue（“remoteDnsServiceUri”、“error.invalid.uri”、“invalid uri”）；
}
}

}

    <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>

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;
}

}

    <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>

@控制器
公共类UserInterfaceController{
@InitBinder
受保护的活页夹（WebDataBinder活页夹）
{
binder.setValidator（新的SettingsValidator（））；
}
@RequestMapping（method=RequestMethod.POST，value=“ui/settings”）
public ModelAndView postSettings（@modeldattribute（“settings”）@有效的VrSettings设置，BindingResult）
{
ModelAndView mav=新的ModelAndView（“设置”）；
mav.addObject（“设置”，设置）；
if（result.hasErrors（））
{
mav.addAllObject（result.getModel（））；
返回mav；
}
LinkedList vrSettingsList=persistenceManager.getAll（新的VrSettings（））；
if（vrSettingsList.isEmpty（））
{
//做事
}
其他的
{
//做事
}
返回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>

    <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>

配置参数


基本URI*
本地基URI
ldns URI*

    <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>

我不明白我错过了什么。感谢您的帮助，提前谢谢


    <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>

<form:errors path="*" />

需要知道它应该在哪个命令对象上操作。所以把这个标签移到里面

    <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>

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

如果没有这个选项，

org.springframework.web.servlet.tags.form.AbstractHtmlElementBodyTag.shouldRender（）org.springframework.web.servlet.tags.form.ErrorsTag
的方法只返回SKIP_BODY
，因为它找不到命令对象的BindingResult

    <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>