java Spring mvc：HTTP 状态 400 - 所需的 MultipartFile 参数“文件”不存在
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Spring mvc: HTTP Status 400 - Required MultipartFile parameter 'file' is not present
提问by Stepan Yakovenko
This is my controller:
这是我的控制器：
@RequestMapping(value = "/admin/users/photo", method = RequestMethod.POST)
public ModelAndView editUser(@RequestParam("file") MultipartFile file,
Principal principal) {
// code never gets here
}
my mvc-dispatcher-servlet.xml
我的 mvc-dispatcher-servlet.xml
<bean id="multipartResolver"
class="org.springframework.web.multipart.support.StandardServletMultipartResolver">
</bean>
pom.xml:
pom.xml:
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
form itself:
形式本身：
<form action="${pageContext.request.contextPath}"
method="POST"
enctype="multipart/form-data">
<input type="file"
name="file"
/>
<input type="submit" value="Добавить">
</form>
This is what browser says:
浏览器是这样说的：
How to fix that?
如何解决？
回答by stacky
You can try to use this
你可以尝试使用这个
<bean id="multipartResolver" class="**org.springframework.web.multipart.commons.CommonsMultipartResolver**" />
instead of
代替
<bean id="multipartResolver"
class="org.springframework.web.multipart.support.StandardServletMultipartResolver">
回答by Honeymon
Servlet 3.0 specification.
Servlet 3.0 规范。
StandardServletMultipartResolver is Standard implementation of the {@link MultipartResolver} interface
StandardServletMultipartResolver 是 {@link MultipartResolver} 接口的标准实现
