《JavaWeb试卷一》答案一、单项选择题D、C、B、D、B、A、D、C、A、B、D、B、A、D、A二、多项选择题ABCDE、ACE、BCD、ABCDE、AD三、简答题1．答：1)页面中文处理：res.setContentType(“text/html;charset=gb2312”);2)表单中文处理String str=request.getParameter(“name”);Byte b[]=str.getBytes(“ISO-8859-1”);Str=new String(b);2．答：1)使用ServletConfig对象访问初始化参数：ServletConfig config=getServletConfig();Config.getInitParameter(“name”);2)使用FilterConfig对象访问初始化参数：FilterConfig config；Config.getInitParameter(“name”);3．答：保存到Cookie中：Cookie=new Cookie(“userType”,user);从Cookie中取数据：Cookie[] cookie=req.getCookies();if (cookies!=null){for(int I=0;I<cookies.length;I++){if (cookies[I].getName().equals(“userType”));…String userType=cookie[I].getValue();}4．答：1)可以实现代码的重复利用。

2)易编写、易维护、易使用。

3)可以在安装了Java运行环境的平台上使用，而不需要重新编译。

5．答： 1)page 指令2)include指令3）taglib指令4)<jsp:include />动作5）<jsp:forward />动作6）〈jsp:useBean />四、编程题1．import java.io.*;import javax.servlet.*;import javax.servlet.http.*;import java.util.*;public class Servlet_test1 extends HttpServlet{public String getString(String str) //中文处理方法{try{if(str==null){ str=""; }else{byte b[]=str.getBytes("ISO-8859-1");str=new String(b);}}catch(Exception e){System.out.println(e.toString());}return str;}public void service(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{response.setContentType("text/html;charset=gb2312");PrintWriter out=response.getWriter();//打印出一个表单out.println("<form action='Servlet_test1' >");out.println("<center>");out.println("用户登录界面");out.println("<p>用户名：<input type='text' name='username'>");out.println("<p>密码：<input type='password' name='password'>");out.println("<p><input type='submit' value='提交' name='submit'>");out.println("<input type='reset' value='重置' name='reset'>");out.println("</center>");//取出所有参数Enumeration e=request.getParameterNames();if(e!=null){while(e.hasMoreElements()){String name=(String)e.nextElement();String value=request.getParameter(name);//中文处理name=getString(name);value=getString(value);//显示所有的参数名和参数信息out.println(name+"："+value);out.println("<br>");}}}}web.xml配置为：<servlet><servlet-name>Servlet_test1</servlet-name><servlet-class>Servlet_test1</servlet-class></servlet><servlet-mapping><servlet-name>Servlet_test1</servlet-name><url-pattern>/Servlet_test1</url-pattern></servlet-mapping>2．ServletC.java：import java.io.*;import javax.servlet.*;import javax.servlet.http.*;public class ServletC extends HttpServlet{public void service(HttpServletRequest request,HttpServletResponse response) throws IOException,ServletException{response.setContentType("text/html;charset=gb2312");PrintWriter out=response.getWriter();out.println("This is ServletC!");}}FilterC.javaimport java.io.*;import javax.servlet.*;import javax.servlet.http.*;public class FilterC implements Filter{public void init(FilterConfig config){}public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain) throws IOException,ServletException{response.setContentType("text/html;charset=gb2312");PrintWriter out=response.getWriter();out.println("This is FilterC before doFilter");out.println("<BR>");chain.doFilter(request,response);out.println("<BR>");out.println("This is FilterC after doFilter");out.println("<BR>");}public void destroy(){}}FilterD.javaimport java.io.*;import javax.servlet.*;import javax.servlet.http.*;public class FilterD implements Filter{public void init(FilterConfig config){}public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain) throws IOException,ServletException{response.setContentType("text/html;charset=gb2312");PrintWriter out=response.getWriter();out.println("This is FilterD before doFilter");out.println("<BR>");chain.doFilter(request,response);out.println("<BR>");out.println("This is FilterD after doFilter");out.println("<BR>");}public void destroy(){}}web.xml配置为：<filter><filter-name>FilterC</filter-name><filter-class>FilterC</filter-class> </filter><filter-mapping><filter-name>FilterC</filter-name><url-pattern>/ServletC</url-pattern> </filter-mapping><filter><filter-name>FilterD</filter-name><filter-class>FilterD</filter-class> </filter><filter-mapping><filter-name>FilterD</filter-name><url-pattern>/ServletC</url-pattern> </filter-mapping>1)按上面顺序配置web.xml打印出的结果为：This is FilterC before doFilterThis is FilterD before doFilterThis is ServletC!This is FilterD after doFilterThis is FilterC after doFilter2)过滤器作用顺序发生改变时候的执行结果为：This is FilterD before doFilterThis is FilterC before doFilterThis is ServletC!This is FilterC after doFilterThis is FilterD after doFilter。