如何在Spring MVC中设置上传文件的路径

Question

我想将上传的文件存储在我指定的文件夹中，如下所示：

/SpringMVC/tmp 

但它存储在此文件夹中：

C:\Users\zhanzhex\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\work\Catalina\localhost\SpringMVC\tmp\spittr\uploads    

这是我处理上传的控制器方法：

@RequestMapping(value="/register", method=RequestMethod.POST)
public String processRegistration(
        @RequestPart(name="profilePicture",required=false) Part profilePicture,
        @Valid Spitter spitter, Errors errors) throws IOException
{
    if (errors.hasErrors())
    {
        System.out.println("find errors");
        return "registerForm";
    }
    profilePicture.write(spitter.getId() + "_profile." + profilePicture.getSubmittedFileName().substring(profilePicture.getSubmittedFileName().indexOf(".") + 1));
    spitterRespository.saveSpitter(spitter);
    return "redirect:/spitter/"+spitter.getId();
}      

我只是在我的/tmp/spittr/uploads中配置文件上传的临时文件夹（web.xml），但我想在控制器方法中调用write方法时更改文件夹，似乎我不能。如果我像这样调用write方法：

profilePicture.write("/tmp/spittr/uploads/" + spitter.getId() + "_profile.jpg");

它将抛出IOException以指示该文件夹不存在：

C:\Users\zhanzhex\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\work\Catalina\localhost\SpringMVC\tmp\spittr\uploads\tmp\spittr\uploads     

所以，我必须删除前缀＆＃34; / tmp / spittr / uploads＆＃34;当我调用profilePicture.write方法时。

请参阅下面的 web.xml ：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns="http://java.sun.com/xml/ns/javaee" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 
id="WebApp_ID" version="3.0">
  <display-name>SpringMVCs</display-name>
  <context-param>
    <param-name>contextClass</param-name>
    <param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext</param-value>
  </context-param>

  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>spittr.config.RootConfig</param-value>
  </context-param>

  <listener>
    <listener-class>
        org.springframework.web.context.ContextLoaderListener
    </listener-class>
  </listener>

  <servlet>
    <servlet-name>spittrAppServlet</servlet-name>
    <servlet-class>
        org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
    <init-param>
        <param-name>contextClass</param-name>
        <param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext</param-value>
    </init-param>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>spittr.config.WebConfig</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
    <multipart-config>
        <location>/tmp/spittr/uploads</location>
        <max-file-size>2097152</max-file-size>
        <max-request-size>4194304</max-request-size>
    </multipart-config>
  </servlet>
  <servlet-mapping>
    <servlet-name>spittrAppServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
 </web-app>

我不知道为什么，我可以更改目标文件夹设置吗？怎么做？

Answer 1

您可以使用MultipartFile或FilePart接口

代替Part

@RequestPart(name="profilePicture",required=false) MultipartFile profilePicture

这些接口公开.transferTo（）函数将数据复制到您可以使用的文件，如

profilePicture.transferTo(new File("/path/to/file"));