字段錯誤和globalerrors在Thymeleaf中保持空白

我目前在一個項目中使用下面的代碼，我遇到的問題是即使在bindingresult（bindingResult.hasErrors（）爲true）中存在錯誤時，它也呈現爲false百里香的結果。這使我認爲bindingResult沒有被正確注入。我在下面的代碼中做了什麼錯誤？字段錯誤和globalerrors在Thymeleaf中保持空白

<form action="blog.html" th:action="@{/fileUpload}" method="post" 
     enctype="multipart/form-data" th:object="${form}"> 
     <input type="text" name="title" th:field="*{title}" /> <input 
       type="text" name="content" th:field="*{content}" /> <input 
       type="file" name="myFile" th:field="*{myFile}" /> <input 
       type="submit" /> 

     <div id="errors" class="alert alert-error"> 
       <ul th:if="${#fields.hasErrors('*')}"> 
         <li th:each="err : ${#fields.errors('*')}" th:text="${err}"></li> 
       </ul> 

       <div th:if="${#fields.hasGlobalErrors()}"> 
         <p th:each="err : ${#fields.globalErrors()}" th:text="${err}">...</p> 
       </div> 
     </div> 
</form>

控制器

@RequestMapping(value = "/blog", method = RequestMethod.GET) 
public String getIndex(Model model) { 
     model.addAttribute("form", new AddBlogForm()); 
     return "blog"; 
} 

@RequestMapping(value = "/fileUpload", method = RequestMethod.POST) 
public String importParse(Model model, @Valid AddBlogForm form, BindingResult bindingResult) { 
     model.addAttribute("form", form); 
     try { 
       if (!bindingResult.hasErrors()) { 
         model.addAttribute("successmessage", "Succesfully added"); 
         blogSrv.addPost(form.getTitle(), form.getContent(), form.getMyFile()); 
         model.addAttribute("form", new AddBlogForm()); 
       } 
       return "blog"; 
     } catch (IllegalStateException e) { 
       bindingResult.addError(new ObjectError("image", "IllegalStateException occured " + e.getMessage())); 
       return "blog"; 
     } catch (IOException e) { 
       bindingResult.addError(new ObjectError("image", "IOException occured " + e.getMessage())); 
       return "blog"; 
     } 
}

來源

2015-06-04 Kristof

刪除'Model'屬性，並添加'@ ModelAttribute'你'AddBlogForm'方法參數。成功保存重定向到你的'/ blog'網址。（Post-redirect-get是一個非常常用的東西）。 –

您正在試圖解決林斯數據綁定，工作與框架。

首先從您的方法簽名中刪除Model屬性，第二次在成功保存後使用重定向，最後將@ModelAttribute添加到您的註釋中。

@RequestMapping(value = "/fileUpload", method = RequestMethod.POST) 
public String importParse(@Valid @ModelAttribute AddBlogForm form, BindingResult bindingResult) { 
    try { 
     if (!bindingResult.hasErrors()) { 
      blogSrv.addPost(form.getTitle(), form.getContent(), form.getMyFile()); 
      return "redirect:/blog"; 
     } 
    } catch (IllegalStateException e) { 
     bindingResult.addError(new ObjectError("image", "IllegalStateException occured " + e.getMessage())); 
    } catch (IOException e) { 
     bindingResult.addError(new ObjectError("image", "IOException occured " + e.getMessage())); 
    } 
    return "blog" 
}

如果你真的想添加一個成功消息模型，使用RedirectAttributes代替，因此它是重定向後，可使用閃光燈消息。

@RequestMapping(value = "/fileUpload", method = RequestMethod.POST) 
public String importParse(@Valid @ModelAttribute AddBlogForm form, BindingResult bindingResult, RedirectAttributes attrs) { 
    try { 
     if (!bindingResult.hasErrors()) { 
      atts.setFlashAttribute("successmessage", "Succesfully added"); 
      blogSrv.addPost(form.getTitle(), form.getContent(), form.getMyFile()); 
      return "redirect:/blog"; 
     } 
    } catch (IllegalStateException e) { 
     bindingResult.addError(new ObjectError("image", "IllegalStateException occured " + e.getMessage())); 
    } catch (IOException e) { 
     bindingResult.addError(new ObjectError("image", "IOException occured " + e.getMessage())); 
    } 
    return "blog" 
}

來源

2015-06-04 09:31:50

經過一些小小的編輯之後，那就成功了！謝啦！ – Kristof

字段錯誤和globalerrors在Thymeleaf中保持空白

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