Question

当我使用spring mvc代码时，我一直收到此错误我正在尝试使用spring mvc进行图像上传，这是我缺少的参数。

org.springframework.web.util.NestedServletException: Request processing failed; 
    nested exception is java.lang.IllegalArgumentException: argument type mismatch
java.lang.IllegalArgumentException: argument type mismatch
...

我的调度程序servlet是

<context:component-scan base-package="com.ImageUploadSpring.Controller" />

<!-- <bean id="simpleHandler" class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/> -->
     <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />

    <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />  


    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver" />

     <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
           <props>              
                <prop key="/Upload.html">FileUpload</prop>                  
            </props>
        </property>
    </bean> 
      <bean id="FileUpload" class="com.ImageUploadSpring.Controller.FileUpload">
        <property name="commandName" value="ImageUpload"/>  
         <property name="commandClass" value="com.ImageUploadSpring.Bean.UploadItem"/>
         <property name="formView" value="ImageUpload"/>
        <property name="successView" value="message"/> 
    </bean>
 <bean id="FileUpload" class="com.ImageUploadSpring.Controller.FileUpload"></bean>
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">

        <property name="prefix" value="/WEB-INF/view/" />
        <property name="suffix" value=".html" />
    </bean>

控制器类

public class FileUpload extends SimpleFormController{

 @RequestMapping(value = "/Upload.html", method = RequestMethod.POST)
protected ModelAndView onSubmit(HttpServletRequest request,
        HttpServletResponse response, Object command, BindException errors,HttpSession session)  {
    System.out.println("inside submit method");
    try{

    UploadItem item=(UploadItem)command;



    MultipartFile file = item.getFile();

    InputStream inputStream = null;
    OutputStream outputStream = null;
    if (file.getSize() > 0) {
        inputStream = file.getInputStream();

        outputStream = new FileOutputStream("D:/UploadedFiles/Images/"
                + file.getOriginalFilename());

        System.out.println(file.getOriginalFilename());

        int readBytes = 0;
        byte[] buffer = new byte[8192];
        while ((readBytes = inputStream.read(buffer, 0, 8192)) != -1) {

            outputStream.write(buffer, 0, readBytes);
        }
        outputStream.close();
        inputStream.close();
        session.setAttribute("uploadFile", "D:/UploadedFiles/Images/"
                + file.getOriginalFilename());
    }       


    }catch (Exception e) {
        e.printStackTrace();
    }   

    return new ModelAndView("message");

}
@Override
 protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder)
 throws ServletException {

     binder.registerCustomEditor(byte[].class, new ByteArrayMultipartFileEditor());

}

我的html页面是

<form name="ImageUpload" action="/ImageUploadSpring/service/Upload.html" method="POST" enctype="multipart/form-data">
<div>
Select images:  
<input type="text" id="box"/> 
<input type="file" id="UploadFile" name="UploadFile"  onchange="CopyMe(this,'box');" accept="image/*" size="40" style="width: 91px;" multiple />
<br><br>  
<input type="submit" value="Upload" /><br><br>
</div>
</form>

Answer 1

试试这个：

protected ModelAndView onSubmit(HttpServletRequest request,HttpServletResponse response,@RequestParam(value="UploadFile") MultipartFile image, BindException errors,HttpSession session)

Answer 2

在定义<input type="file">时，您已指定名称name="UploadFile"。而在您的UploadItem命令对象中，文件属性为file（从item.getFile（）猜测）。您确定正确映射文件名吗？

请参阅this tutorial了解有关Spring MVC文件上传的工作教程

Answer 3

本教程http://www.journaldev.com/2573/spring-mvc-file-upload-example-tutorial-single-and-multiple-files对我也很有用。这很简单。重要的是当你使用

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="100000" />
</bean>

，不要忘记将commons-fileupload添加到你的pom依赖项中。

使用Spring MVC和Html进行图像上传

3 个答案: