本文介绍了使用Spring MVC将文件上载到服务器目录的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试从客户端计算机上传文件到服务器目录。我使用了以下代码:
I am trying to upload a file to the server directory from client machine. I used the following codes :
FileUpload.jsp
FileUpload.jsp
<form:form commandName="fileUpload" action="upload.action" method="post" enctype="multipart/form-data">
<form:label path="fileData">Upload a File</form:label> <br />
<form:input type="file" path="fileData" />
<input type="submit" value="upload" >
</form:form>
在我的财务总监中:
@RequestMapping("/upload.action")
public String upload(@ModelAttribute("fileUpload") FileUpload fileUpload,HttpServletResponse response,Model model)
{
CommonsMultipartFile multipartFile = fileUpload.getFileData();
String orginalName = multipartFile.getOriginalFilename();
String filePath = "/my_uploads/"+orginalName;
File destination = new File(filePath);
String status ="success";
try {
multipartFile.transferTo(destination);
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
status="failure";
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
status="iofailure";
}
model.addAttribute("status", status);
return "home";
}
FileUpload.java:
FileUpload.java :
{
private CommonsMultipartFile fileData;
....
}
NullPointerException
抛出行 String orginalName = multipartFile.getOriginalFilename();
..我做错了什么?
NullPointerException
is thrown at the line String orginalName = multipartFile.getOriginalFilename();
.. what wrong thing i have done??
推荐答案
尝试在请求处理程序中添加 MultipartFile
作为参数。
Try adding the MultipartFile
as a parameter in your requesthandler.
@RequestMapping("/upload.action")
public String upload(@RequestParam(value = "file") MultipartFile file,
HttpServletResponse response,Model model)
{
//Controller logic...
}
这将要求您在调度员的配置中注册一个新的bean。
This will require you to register a new bean in your dispatcher's configuration.
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="5000000"/>
</bean>
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