Not showing error messages when validated using @valid(JSR-303) in Spring MVC

I have specified <mvc:annotation-driven /> in dispatcher-servlet. I am not using @InitBinder.

And I am using @valid annotation for validation in controller's method like

@RequestMapping(method = RequestMethod.POST, value = "new")
    public String save(@Valid Article article,ModelMap model) {
//code here
}

And validation works fine, but instead of showing error in .. sample shown in html code

<tr>
         <td>Title</td>
         <td><form:input path="title"/></td>
         <td><form:errors path="title"/></td>
</tr>

It throws exception like..

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.validation.BindException: org.springframework.validation.BeanPropertyBindingResult: 2 errors Field error in object 'article' on field 'urlInfo.url': rejected value []; codes [typeMismatch.article.urlInfo.url,typeMismatch.urlInfo.url,typeMismatch.url,typeMismatch.java.net.URL,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [article.urlInfo.url,urlInfo.url]; arguments []; default message [urlInfo.url]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'java.net.URL' for property 'urlInfo.url'; nested exception is org.springframework.core.convert.ConversionFailedException: Unable to convert value from type 'java.lang.Stri开发者_开发技巧ng' to type 'java.net.URL'; nested exception is org.springframework.core.convert.ConversionFailedException: Unable to convert value from type 'java.lang.String' to type 'java.net.URL'; nested exception is java.lang.reflect.InvocationTargetException] Field error in object 'article' on field 'title': rejected value []; codes [Size.article.title,Size.title,Size.java.lang.String,Size]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [article.title,title]; arguments []; default message [title],{javax.validation.constraints.Size.message},6,[Ljava.lang.Class;@1db3aac,2147483647,[Ljava.lang.Class;@1e90abf]; default message [size must be between 6 and 2147483647]

 org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:659)
 org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:563)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
 org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213)
 org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171)
 org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
 org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
 org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:381)
 org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

How to configure it, to not throw an exception and instead return to page and show error messages...

In your controller handler method, make sure that the BindingResult argument is immediately after the command argument.

You should explicitly decide what to do with validation errors:

@RequestMapping(method = RequestMethod.POST, value = "new") 
public String save(@Valid Article article, BindingResult result, ModelMap model) { 
    if (result.hasErrors())
        return "formView";