超星 - 作业6 监听器与过滤器

单选题

调用ServletContext的setAttribute()方法时，会触发哪个方法调用？（假设有关联的监听器）______

A. ServletContextAttributeListener的attributeAdded()方法
B. ServletContextAttributeListener的attributeRemoved()方法
C. ServletContextAttributeListener的attributeDeleted()方法
D. 不会调用监听器的任何方法

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单选题

调用HttpSession的removeAttribute()方法时，会触发哪个方法调用？（假设有关联的监听器）______。

A. HttpSessionListener的attributeRemoved()方法
B. HttpSessionActivateionListener的attributeRemoved()方法
C. HttpSessionBindingListener的attributeRemoved()方法
D. HttpSessionAttributeListener的attributeRemoved()方法

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单选题

在web.xml文件中，元素不是用来配置过滤器的。

A. <filter>
B. <filter-mapping>
C. <filter-name>和<url-pattern>
D. <listener>

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单选题

下述代码定义了两个过滤器，并在web.xml配置完毕：Filter1.javapublic class Filter1 implements Filter {@Overridepublic void destroy() {}@Overridepublic void doFilter(ServletRequest arg0, ServletResponse arg1,FilterChain arg2)throws IOException, ServletException {System.out.println("enter Filter1");arg2.doFilter(arg0, arg1);System.out.println("exit Filter1");}@Overridepublic void init(FilterConfig arg0) throws ServletException {}}Filter2.javapublic class Filter2 implements Filter {@Overridepublic void destroy() {}@Overridepublic void doFilter(ServletRequest arg0, ServletResponse arg1,FilterChain arg2)throws IOException, ServletException {System.out.println("enter Filter2");arg2.doFilter(arg0, arg1);System.out.println("exit Filter2");}@Overridepublic void init(FilterConfig arg0) throws ServletException {}}web.xml<filter>filter1x.Filter1</filter><filter>filter2x.Filter2</filter>filter1/filter2/当访问网站首页时，控制台的输出为______。

A. enter Filter1enter Filter2exit Filter2exit Filter1
B. enter Filter1enter Filter2exit Filter1exit Filter2
C. enter Filter2enter Filter1exit Filter2exit Filter1
D. enter Filter2enter Filter1exit Filter1exit Filter2

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单选题