j在线考试系统-bean文件_JSP技巧_黑客防线网安服务器维护基地--Powered by WWW.RONGSEN.COM.CN

j在线考试系统-bean文件

作者:黑客防线网安JSP教程基地 来源:黑客防线网安JSP教程基地 浏览次数:0

本篇关键词:文件系统考试在线
黑客防线网安网讯:一个在线考试系统,测试你的jsp知识,代码不是特别多,所以不加注释了(http://jspbbs.yeah.net)  QuizResponses.java    answer.jsp    <%-- Include directive --%>  <%@ incl...
一个在线考试系统测试你的jsp知识代码不是特别多,所以不加注释了(http://jspbbs.yeah.net)
   QuizResponses.java
  
   answer.jsp
  
   <%-- Include directive --%>
   <%@ include file="header.html" %>
  
   <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0">
   <TR>
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <DIV ALIGN="RIGHT">
   <FONT SIZE="-1"><A HREF="/developer/Quizzes/index.html">Quizzes
   Index</A></FONT></DIV>
   <H2 ALIGN="RIGHT"><FONT COLOR="#FFFFFFF">JSP Professional, Chapter 12 Quiz
   Answers</FONT></H2>
   <H4 ALIGN="RIGHT"><EM>by Dan Malks</EM></H4>
   <BR><BR>
   <TABLE BORDER="0" CELLSPACING="8" CELLPADDING="2" <TR><TD>
   <FONT FACE="Verdana, Arial, Helvetica, sans-serif">
  
   <%-- Page directive that applies to entire page. --%>
   <%@ page language="java" %>
  
   <%-- Identifies bean as "worker" and tells the page where to locate the bean. --%>
   <jsp:useBean id="worker" class="jdc.quiz.QuizResponses" scope="request" />
  
   <%-- Set bean properties with a wildcard. --%>
   <jsp:setProperty name="worker" property="*" />
  
  
   <%-- Scoring --%>
  
   <%-- Variable declaration in code scriptlet -->
   <% int score = 0; %>
  
   <!-- Quiz Questions -->
  
   <!-- Question 1 -->
  
   <TR><TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">1.</FONT></TD>
  
   <%-- The method getOne() was set up in the bean with the id "worker" --%>
   <%-- All Java code is enclosed in <% %>, leaving HTML to be easily --%>
   <%-- changed or updated. --%>
  
   <% if((worker.getOne() != null) && ((worker.getOne()).equals("D"))) { score ++; %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif"> <B>D</B>
   is correct!</FONT></TD>
  
  
   <% } else if (worker.getOne() != null) { %>
  
  
   <TD VALIGN="TOP"><FONT COLOR=red><jsp:getProperty name="worker" property="one" />
   is incorrect!</FONT></TD>
  
   <% } else { %>
  
   <TD VALIGN="TOP">Blank <FONT COLOR=red>X</FONT></TD>
  
   <% } %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Every JavaServer Pages<SUP><FONT SIZE="-2">TM</FONT></SUP>
   (JSP)<SUP><FONT SIZE="-2">TM</FONT></SUP>source page is compiled into
   a servlet before it is executed at runtime.</A><BR><BR></FONT></TD></TR>
  
   <!-- Question 2 -->
  
  
   <TR><TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">2.</FONT></TD>
  
  
   <% if ((worker.getTwo() != null) && ((worker.getTwo()).equals("B"))) { score ++; %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif"> <B>B</B>
   is correct!<BR></FONT></TD>
  
  
   <% } else if (worker.getTwo() != null) { %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <FONT COLOR=red><jsp:getProperty name="worker" property="two" /> is
   incorrect</FONT></TD>
  
   <% } else { %>
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Blank
   <FONT COLOR=red>X</FONT></FONT></TD>
  
   <% } %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   When large amounts of Java scriptlet code are mixed with HTML markup
   within a JSP page, not only do readability and reuse suffer, but often
   bugs are introduced as web-production team members, who may not be
   familiar with Java programming, need to modify the accompanying markup.
   Additionally, dependencies now exist among various teams competing for the
   same file, making the development process less efficient.
   </FONT>
   </TD></TR>
  
   <!-- Question 3 -->
  
  
   <TR><TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">3.</FONT></TD>
  
   <% if ((worker.getThree() != null) && ((worker.getThree()).equals("D"))) { score ++; %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif"> <B>D</B>
   is correct!<BR></FONT></TD>
  
  
   <% } else if (worker.getThree() != null) { %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <FONT COLOR=red><jsp:getProperty name="worker" property="three" /> is
   incorrect</FONT></FONT></TD>
  
   <% } else { %>
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Blank <FONT COLOR=red>X</FONT></FONT></TD>
  
   <% } %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Doing an HTTP redirect requires a round-trip to the client. If this
   is not required, and the only desire is to forward the request to
   another resource, then this can be much more efficiently accomplished
   with the <CODE>RequestDispatcher</CODE>. Additionally, when using the
   dispatcher the state of the request object is maintained between
   resources, which will not be the case with the HTTP redirect.
  
   </FONT></TD></TR>
  
   <!-- Question 4 -->
  
  
   <TR><TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">4.</TD>
  
   <% if ((worker.getFour() != null) && ((worker.getFour()).equals("C"))) { score ++; %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif"> <B>C</B>
   is correct!<BR></FONT></TD>
  
  
   <% } else if (worker.getFour() != null) { %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <FONT COLOR=red><jsp:getProperty name="worker" property="four" /> is
   incorrect</FONT></FONT></TD>
  
   <% } else { %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Blank <FONT COLOR=red>X</FONT></FONT></TD>
  
   <% } %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Business logic is better contained in a
   JavaBean<SUP><FONT SIZE="-2">TM</FONT></SUP> or a servlet, which is
   owned by a software developer. When lots of Java code is embedded
   directly within the JSP page as scriptlets, the
   &quot;cut-and-paste&quot; mentality tends to prevail when it comes
   to code reuse.
   </FONT>
   </TD></TR>
  
   <!-- Question 5 -->
  
  
   <TR><TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">5.</FONT></TD>
  
   <% if ((worker.getFive() != null) && ((worker.getFive()).equals("A"))) { score ++; %>
  
   <TD VALIGN="TOP"> <FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <B>A</B> is correct!<BR></FONT></TD>
  
  
   <% } else if (worker.getFive() != null) { %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <FONT COLOR=red><jsp:getProperty name="worker" property="five" /> is
   incorrect</FONT></FONT></TD>
  
   <% } else { %>
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Blank <FONT COLOR=red>X</FONT></FONT></TD>
  
   <% } %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Since the servlet is the initial contact point for each request, it is
   well-suited to handle logic that is common across multiple requests.
   A good example of this type of logic is an authentication check.
   </FONT>
   </TD></TR>
  
   <!-- Question 6 -->
  
  
   <TR><TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">6.</FONT></TD>
  
   <% if ((worker.getSix() != null) && ((worker.getSix()).equals("B"))) { score ++; %>
  
   <TD VALIGN="TOP"> <FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <B>B</B> is correct!<BR></FONT></TD>
  
  
   <% } else if (worker.getSix() != null) { %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <FONT COLOR=red><jsp:getProperty name="worker" property="six" /> is
   incorrect</FONT></FONT></TD>
  
   <% } else { %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Blank <FONT COLOR=red>X</FONT></FONT></TD>
  
   <% } %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Using a business delegate reduces coupling between the presentation
   and business tiers. The presentation tier has no knowledge of the
   EJB implementation details, such as Java Naming and Directory
   Interface<SUP><FONT SIZE="-2">TM</FONT></SUP> lookup.
   </FONT>
   </TD></TR>
  
   <!-- Question 7 -->
  
  
   <TR><TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">7.</FONT></TD>
  
   <% if ((worker.getSeven() != null) && ((worker.getSeven()).equals("B"))) { score ++; %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <B>B</B> is correct!<BR></FONT></TD>
  
  
   <% } else if (worker.getSeven() != null) { %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <FONT COLOR=red><jsp:getProperty name="worker" property="seven" /> is
   incorrect</FONT></FONT></TD>
  
   <% } else { %>
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Blank <FONT COLOR=red>X</FONT></FONT></TD>
  
   <% } %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Using Java scriptlets is the accepted method of doing iteration in
   JSP<SUP><FONT SIZE="-2">TM</FONT></SUP> 1.0. In
   JSP<SUP><FONT SIZE="-2">TM</FONT></SUP> 1.1, a custom tag may be used,
   which will hide the implementation details of the iteration code.
  
   </FONT></TD></TR>
  
   <!-- Question 8 -->
  
  
   <TR><TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">8.
   </FONT></TD>
  
   <% if ((worker.getEight() != null) && ((worker.getEight()).equals("A"))) { score ++; %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <B>A</B> is correct!<BR></FONT></TD>
  
  
   <% } else if (worker.getEight() != null) { %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <FONT COLOR=red><jsp:getProperty name="worker" property="eight" /> is
   incorrect</FONT></FONT></TD>
  
   <% } else { %>
   <TD><FONT FACE="Verdana, Arial, Helvetica, sans-serif">Blank
   <FONT COLOR=red>X</FONT></FONT></TD>
  
   <% } %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   The term <I>Page-Centric</I> is used to describe an architecture where
   the initial contact point for the request is a JSP page. An example
   is shown visually below:
   <P>
   <IMG SRC="Image1.gif" WIDTH="412" HEIGHT="204" ALT="JSP Page-Centric">
   </FONT>
   </TD></TR>
  
   <!-- Question 9 -->
  
  
   <TR><TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">9.
   </FONT></TD>
  
   <% if ((worker.getNine() != null) && ((worker.getNine()).equals("A"))) { score ++; %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <B>A</B> is correct!<BR></FONT></TD>
  
  
   <% } else if (worker.getNine() != null) { %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <FONT COLOR=red><jsp:getProperty name="worker" property="nine" /> is
   incorrect</FONT></FONT></TD>
  
   <% } else { %>
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Blank <FONT COLOR=red>X</FONT></FONT></TD>
  
   <% } %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   When the forward method is used, the invoking resource does not regain
   control. Multiple include invocations can be made from the same
   resource, while the invoking resource maintains execution control.
   </FONT>
   </TD></TR>
  
   <!-- Question 10 -->
  
  
   <TR><TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">10.
   </FONT></TD>
  
   <% if ((worker.getTen() != null) && ((worker.getTen()).equals("D"))) { score ++; %>
  
   <TD VALIGN="TOP"> <B>D</B> is correct!<BR></FONT></TD>
  
  
   <% } else if (worker.getTen() != null) { %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <FONT COLOR=red><jsp:getProperty name="worker" property="ten" /> is
   incorrect</FONT></FONT></TD>
  
   <% } else { %>
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Blank <FONT COLOR=red>X</FONT></FONT></TD>
  
   <% } %>
  
   <TD VALIGN="TOP"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   Error pages are invoked when there is an uncaught exception from
   within a particular page. In this case, we mention that the
   <CODE>validationGaurd()</CODE> method might throw an exception.
   If this exception is not caught within the page, then we vector
   control to the <CODE>errorPage</CODE>, as stipulated in the attribute
   of the given page directive.
  
  
   </FONT></TD></TR>
   <%-- Scoring calculations --%>
   <%
   int missed = 10 - score;
   double grade = (double)score/10*100;
   %>
  
   <TR><TD colspan="3"><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
   <P>You missed<STRONG> <%= missed %></STRONG>
   <BR>Your score is<STRONG> <%= (int)grade %> </STRONG> percent.
   <H4>Source Code</H4>
   <P>This quiz used the <I>Page-View with Bean Approach</I>, detailed in <A
   HREF="/developer/Books/javaserverpages/">Chapter 12, JSP Archeticure</A>. The <A HREF="index.txt">first
   page</A> of the quiz consists of regular HTML with a form that calls <A
   HREF="answer.txt"><CODE>answer.jsp</CODE></A>. <CODE>Answer.jsp</CODE> requests parameters from the bean,
   in this case, called <A HREF="QuizResponses.txt">QuizResponses</A>. The <I>page-view with bean</I>
   approach for this quiz required extra work to write the bean, and it could have been done using the
   <I>page-view approach</I> without a bean, requesting invocation directly from the <CODE>answer.jsp</CODE>
   page. Deciding which approach is preferrable depends on the application and how much HTML and Java
   scriptlets need to be used. For this quiz we opted for the <I>page-view with bean</I> approach for
   illustration purposes.
  
   <P><A HREF=/developer/Quizzes/jsp/index.html>Back to Quiz</A>
   <P><IMG SRC=/images/T7.gif ALIGN=LEFT>
  
  
   </TABLE>
   <P>
  
   <%@ include file="footer.html" %>
  
  
    黑客防线网安服务器维护方案本篇连接:http://www.rongsen.com.cn/show-16555-1.html
网站维护教程更新时间:2012-04-07 00:33:30  【打印此页】  【关闭
我要申请本站N点 | 黑客防线官网 |  
专业服务器维护及网站维护手工安全搭建环境,网站安全加固服务。黑客防线网安服务器维护基地招商进行中!QQ:29769479

footer  footer  footer  footer