java - Spring MVC - 多部分表单数据

Question

我得到了这个 jsp 文件:

<form:form class="main-section" modelAttribute="demandeForm" commandName="demandeForm" 
name="demandeForm" method="post" enctype="multipart/form-data;charset=UTF-8" action="/validate.do?valider=valider">

<!-- Some input text -->

<ul>
   <li>
      <input type="file" name="file" >
   </li>
   <li>
      <input type="file" name="file" >
   </li>
   <li>
      <input type="file" name="file" >
   </li>
</ul>

这是我的表单类:

public class DemandeForm {

    private MultipartFile[] file;

    public MultipartFile[] getFile() {
        return file;
    }

    public void setFile(final MultipartFile[] pFile) {
        this.file = pFile;
    }
}

还有我的 Controller :

@RequestMapping(method = RequestMethod.POST, params = "valider")
public String valider(@Valid final DemandeForm pForm, final BindingResult pResult, final Model pModel, final HttpServletRequest pRequest) {

    // do things

    if (pResult.hasErrors()) {
        return MY_VUE;
    }

    // do things

}

pResult绑定(bind)错误，错误如下:

Failed to convert property value of type java.lang.String[] 
to required type org.springframework.web.multipart.MultipartFile[] 
for property file; nested exception is java.lang.IllegalStateException: 
Cannot convert value of type [java.lang.String] to required type 
[org.springframework.web.multipart.MultipartFile] for property file[0]: 
no matching editors or conversion strategy found 

错误出现是因为我在 enctype 值上添加了 charse=UTF-8。我需要这个，因为我有这个重音符号和 UTF-8 字符的文件。

我该如何处理？

Answer 1

你试过吗:

<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
  <property name="defaultEncoding"><value>utf-8</value></property>
</bean>

并且不要使用:

enctype="multipart/form-data;charset=UTF-8"

在你的表单中