javax.servlet
接口 FilterConfig

public interface FilterConfig

A filter configuration object used by a servlet container to pass information to a filter during initialization.

从以下版本开始：

Servlet 2.3

另请参见：

Filter

方法摘要

String	getFilterName() Returns the filter-name of this filter as defined in the deployment descriptor.
String	getInitParameter(String name) Returns a String containing the value of the named initialization parameter, or null if the initialization parameter does not exist.
Enumeration<String>	getInitParameterNames() Returns the names of the filter's initialization parameters as an Enumeration of String objects, or an empty Enumeration if the filter has no initialization parameters.
ServletContext	getServletContext() Returns a reference to the ServletContext in which the caller is executing.

方法详细信息

getFilterName

String getFilterName()

Returns the filter-name of this filter as defined in the deployment descriptor.

getServletContext

ServletContext getServletContext()

Returns a reference to the ServletContext in which the caller is executing.

返回：

a ServletContext object, used by the caller to interact with its servlet container

另请参见：

ServletContext

getInitParameter

String getInitParameter(String name)

Returns a String containing the value of the named initialization parameter, or null if the initialization parameter does not exist.

参数：

name - a String specifying the name of the initialization parameter

返回：

a String containing the value of the initialization parameter, or null if the initialization parameter does not exist

getInitParameterNames

Enumeration<String> getInitParameterNames()

Returns the names of the filter's initialization parameters as an Enumeration of String objects, or an empty Enumeration if the filter has no initialization parameters.

返回：

an Enumeration of String objects containing the names of the filter's initialization parameters