下面关于过滤器的生命周期的描述,正确的是( )

A. 当客户请求访问的URL与为过滤器映射的URL匹配时,Servlet容器将先创建过滤器对象,再依次调用init()、doFilter()和destroy()方法
B. 当客户发出的请求URL与为过滤器映射的URL匹配时,Servlet容器将调用过滤器的doFilter()方法
C. 当Web应用终止时,Servlet容器将先调用过滤器对象的destroy()方法,然后销毁过滤器对象
D. 当Web应用启动时,Servlet容器会初始化web.xml中配置的过滤器

下面选项,能解决POST提交方式,参数的中文乱码问题的是( )

A. public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException { response.setContentType("text/html;charset=UTF-8"); chain.doFilter(request, response); }
B. public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException { request.setCharacterEncoding("UTF-8"); chain.doFilter(request, response); }
C. public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException { response.setCharacterEncoding("UTF-8"); chain.doFilter(request, response); }
D. public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException { request.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); chain.doFilter(request, response); }

下面选项中,与过滤器有关的接口是( )

A. javax.servlet.Filter
B. javax.servlet.FilterChain
C. javax.servlet.FilterConfig
D. javax.servlet.ServletConfig

已知,在web.xml文件中<filter>元素的配置信息如下:<filter>RequestFiltercn.itcast.RequestFilter</filter>以下选项中,能够使RequestFilter为应用根目录下的out.jsp提供过滤的配置是( )

A. <filter-mapping> <filter-name>RequestFilter</filter-name><url-pattern>/out.jsp</url-pattern> </filter-mapping>
B. <filter-mapping><filter-name> cn.itcast.RequestFilter</filter-name> <url-pattern>/out.jsp</url-pattern> </filter-mapping>
C. <filter-mapping> <filter-name>RequestFilter</filter-name> <url-pattern>/out</url-pattern> </filter-mapping>
D. <filter-mapping> <filter-name>RequestFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>

过滤器配置中,用于匹配用户请求的URL的元素是____。

Web服务器在卸载Filter对象之前,将被调用的方法是____。

用于设置Filter类的完整名称的元素是____。

Filter链中各个Filter执行请求时的拦截顺序与响应时的拦截顺序____。