java.lang.Object
- org.springframework.web.filter.GenericFilterBean
- - org.springframework.web.filter.OncePerRequestFilter
  - - org.springframework.web.multipart.support.MultipartFilter

所有已实现的接口:
Filter, Aware, BeanNameAware, DisposableBean, InitializingBean, EnvironmentAware, EnvironmentCapable, ServletContextAware
```
public class MultipartFilter
extends OncePerRequestFilter
```
Servlet Filter that resolves multipart requests via a MultipartResolver. in the root web application context.
Looks up the MultipartResolver in Spring's root web application context. Supports a "multipartResolverBeanName" filter init-param in web.xml; the default bean name is "filterMultipartResolver".
If no MultipartResolver bean is found, this filter falls back to a default MultipartResolver: StandardServletMultipartResolver for Servlet 3.0, based on a multipart-config section in web.xml. Note however that at present the Servlet specification only defines how to enable multipart configuration on a Servlet and as a result multipart request processing is likely not possible in a Filter unless the Servlet container provides a workaround such as Tomcat's "allowCasualMultipartParsing" property.
MultipartResolver lookup is customizable: Override this filter's lookupMultipartResolver method to use a custom MultipartResolver instance, for example if not using a Spring web application context. Note that the lookup method should not create a new MultipartResolver instance for each call but rather return a reference to a pre-built instance.
Note: This filter is an alternative to using DispatcherServlet's MultipartResolver support, for example for web applications with custom web views which do not use Spring's web MVC, or for custom filters applied before a Spring MVC DispatcherServlet (e.g. HiddenHttpMethodFilter). In any case, this filter should not be combined with servlet-specific multipart resolution.
从以下版本开始:
08.10.2003
作者:
Juergen Hoeller
另请参阅:
setMultipartResolverBeanName(java.lang.String), lookupMultipartResolver(javax.servlet.http.HttpServletRequest), MultipartResolver, DispatcherServlet

字段概要
字段
修饰符和类型字段说明
static String DEFAULT_MULTIPART_RESOLVER_BEAN_NAME
- 从类继承的字段 org.springframework.web.filter.OncePerRequestFilter
  ALREADY_FILTERED_SUFFIX
- 从类继承的字段 org.springframework.web.filter.GenericFilterBean
  logger

构造器概要
构造器
构造器说明
MultipartFilter()

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`protected void`	`doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)`	Check for a multipart request via this filter's MultipartResolver, and wrap the original request with a MultipartHttpServletRequest if appropriate.
`protected String`	`getMultipartResolverBeanName()`	Return the bean name of the MultipartResolver to fetch from Spring's root application context.
`protected MultipartResolver`	`lookupMultipartResolver()`	Look for a MultipartResolver bean in the root web application context.
`protected MultipartResolver`	`lookupMultipartResolver(HttpServletRequest request)`	Look up the MultipartResolver that this filter should use, taking the current HTTP request as argument.
`void`	`setMultipartResolverBeanName(String multipartResolverBeanName)`	Set the bean name of the MultipartResolver to fetch from Spring's root application context.

从类继承的方法 org.springframework.web.filter.OncePerRequestFilter
doFilter, getAlreadyFilteredAttributeName, isAsyncDispatch, isAsyncStarted, shouldNotFilter, shouldNotFilterAsyncDispatch, shouldNotFilterErrorDispatch

从类继承的方法 org.springframework.web.filter.GenericFilterBean
addRequiredProperty, afterPropertiesSet, createEnvironment, destroy, getEnvironment, getFilterConfig, getFilterName, getServletContext, init, initBeanWrapper, initFilterBean, setBeanName, setEnvironment, setServletContext

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - DEFAULT_MULTIPART_RESOLVER_BEAN_NAME
```
public static final String DEFAULT_MULTIPART_RESOLVER_BEAN_NAME
```
    另请参阅:
    常量字段值
- 构造器详细资料
  - MultipartFilter
```
public MultipartFilter()
```
- 方法详细资料
  - setMultipartResolverBeanName
```
public void setMultipartResolverBeanName(String multipartResolverBeanName)
```
    Set the bean name of the MultipartResolver to fetch from Spring's root application context. Default is "filterMultipartResolver".
  - getMultipartResolverBeanName
```
protected String getMultipartResolverBeanName()
```
    Return the bean name of the MultipartResolver to fetch from Spring's root application context.
  - doFilterInternal
```
protected void doFilterInternal(HttpServletRequest request,
                                HttpServletResponse response,
                                FilterChain filterChain)
                         throws ServletException,
                                IOException
```
    Check for a multipart request via this filter's MultipartResolver, and wrap the original request with a MultipartHttpServletRequest if appropriate.
    All later elements in the filter chain, most importantly servlets, benefit from proper parameter extraction in the multipart case, and are able to cast to MultipartHttpServletRequest if they need to.
    指定者:
    doFilterInternal 在类中 OncePerRequestFilter
    抛出:
    ServletException
    IOException
  - lookupMultipartResolver
```
protected MultipartResolver lookupMultipartResolver(HttpServletRequest request)
```
    Look up the MultipartResolver that this filter should use, taking the current HTTP request as argument.
    The default implementation delegates to the lookupMultipartResolver without arguments.
    返回:
    the MultipartResolver to use
    另请参阅:
    lookupMultipartResolver()
  - lookupMultipartResolver
```
protected MultipartResolver lookupMultipartResolver()
```
    Look for a MultipartResolver bean in the root web application context. Supports a "multipartResolverBeanName" filter init param; the default bean name is "filterMultipartResolver".
    This can be overridden to use a custom MultipartResolver instance, for example if not using a Spring web application context.
    返回:
    the MultipartResolver instance, or null if none found

类 MultipartFilter

字段概要

从类继承的字段 org.springframework.web.filter.OncePerRequestFilter

从类继承的字段 org.springframework.web.filter.GenericFilterBean

构造器概要

方法概要

从类继承的方法 org.springframework.web.filter.OncePerRequestFilter

从类继承的方法 org.springframework.web.filter.GenericFilterBean

从类继承的方法 java.lang.Object

字段详细资料

DEFAULT_MULTIPART_RESOLVER_BEAN_NAME

构造器详细资料

MultipartFilter

方法详细资料

setMultipartResolverBeanName

getMultipartResolverBeanName

doFilterInternal

lookupMultipartResolver

lookupMultipartResolver