FilterConfig (Java EE 5)

servlet 容器使用的过滤器配置对象，该对象在初始化期间将信息传递给过滤器。

since	en Servlet 2.3
See also	javax.servlet.Filter

英文文档：

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

Since:

Servlet 2.3

See Also:

Filter

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Method Summary
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 parameter does not exist.
Enumeration	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.

 

Method Detail

public String getFilterName()
如部署描述符中定义的那样，返回此过滤器的过滤器名称。

英文文档：

getFilterName

String getFilterName()

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

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public ServletContext getServletContext()
返回对调用者在其中执行操作的 ServletContext 的引用。

return	一个 ServletContext 对象，调用者用于与其 servlet 容器交互
See also	javax.servlet.ServletContext

英文文档：

getServletContext

ServletContext getServletContext()

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

Returns:

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

See Also:

ServletContext

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public String getInitParameter(String name)
返回包含指定初始化参数的值的 String，如果参数不存在，则返回 null。

name	指定初始化参数名称的 String
return	包含初始化参数值的 String

英文文档：

getInitParameter

String getInitParameter(String name)

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

Parameters:

name - a String specifying the name of the initialization parameter

Returns:

a String containing the value of the initialization parameter

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public java.util.Enumeration<E> getInitParameterNames()
以 String 对象的 Enumeration 的形式返回过滤器初始化参数的名称，如果过滤器没有初始化参数，则返回一个空的 Enumeration。

return

包含过滤器初始化参数名称的 String 对象的 Enumeration

英文文档：

getInitParameterNames

Enumeration 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.

Returns:

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

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