Spring 3 MVC 使用 Hibernate 进行验证，hasErrors 之后出现错误？
我正在学习 Spring3 与 Hibernate 的验证。我想添加验证，因此我在函数调用中 pyt @Valid 并将代码添加到 formbean 中，但如果 formbean 有错误，我会收到以下错误。如果没有错误，则效果很好。请让我知道我做错了什么。谢谢
来源：
@RequestMapping(value = "/save", method = RequestMethod.POST)
public ModelAndView saveArticle(@Valid @ModelAttribute(" article") Article article, BindingResult result)
{
System.out.println("In ModelAndView");
// Adding code to check for errors;
if (result.hasErrors())
{
System.out.println("In ModelAndView-hasErrors");
return new ModelAndView("addArticle");
}
articleService.addArticle( article);
return new ModelAndView("redirect:/articles.html");
}
控制台输出：
In ModelAndView
In ModelAndView-hasErrors
Mar 25, 2011 9:41:30 AM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'article' available as request attribute
I am just learning Spring3 Validation with Hibernate. I wanted to add Validation so I pyt the @Valid in the function call and add the code into the formbean but I get the following error if the formbean has a error. if it does not have a error it works great. please et me know what I am NOT doing right. thanks
Source:
@RequestMapping(value = "/save", method = RequestMethod.POST)
public ModelAndView saveArticle(@Valid @ModelAttribute(" article") Article article, BindingResult result)
{
System.out.println("In ModelAndView");
// Adding code to check for errors;
if (result.hasErrors())
{
System.out.println("In ModelAndView-hasErrors");
return new ModelAndView("addArticle");
}
articleService.addArticle( article);
return new ModelAndView("redirect:/articles.html");
}
Console output:
In ModelAndView
In ModelAndView-hasErrors
Mar 25, 2011 9:41:30 AM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'article' available as request attribute
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删除多余的空格：
@ModelAttribute("article")您的模型属性绑定为
"article"，而您的表单尝试重新显示名为"的模型属性文章”，显然没有绑定。Remove the extra whitespace:
@ModelAttribute(" article")Your model attribute is bound as
" article", whereas your form tries to redisplay a model attribute named"article", which is obviously not bound.