我正在使用 Spring-MVC 来构建宁静的服务。使用 multipart-form 服务 POST 请求时,我想限制发布的文件大小。通常方法如下:
<web-app version="3.0"...
//...other code omitted
<servlet>
<servlet-name>restful</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/restful-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<multipart-config>
<max-file-size>500</max-file-size>
</multipart-config>
</servlet>
而我的 restful-context.xml 就像:
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<mvc:annotation-driven>
<mvc:message-converters>
<beans:bean
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" />
</mvc:message-converters>
</mvc:annotation-driven>
<beans:bean
class="org.springframework.web.multipart.support.StandardServletMultipartResolver"
id="multipartResolver" />
//...
</beans:beans>
以上是PRO SPRING 4告诉我要做的。但是 max-file-size 不生效。我尝试发布一个非常大的文件(接近 1GB),没有抛出异常。有人帮忙吗?
后来我从 web.xml 中删除了 DispatcherServlet 配置,而是使用@MultipartConfig 尝试了注释样式,如下(感谢@RE350):
@WebServlet(loadOnStartup = 1, name = "restful", urlPatterns = { "/restful/*" }, initParams = { @WebInitParam(name = "contextConfigLocation", value = "/WEB-INF/spring/appServlet/restful-context.xml") })
@MultipartConfig(maxFileSize = 500)
public class MyDispatcherServlet extends DispatcherServlet {}
它奏效了!!!那么为什么 web.xml 方式不起作用呢?等待你的答复。