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    jsp在线考试系统-jsp文件_MySQL

    2016-06-01 14:08:20原创596
    　　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)

    answer.jsp

    <%-- Include directive --%>
    <%@ include file="header.html" %>





    JSP Professional, Chapter 12 Quiz
    Answers


    by Dan Malks







    <%-- 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 ++; %>




    <% } else if (worker.getOne() != null) { %>




    <% } else { %>



    <% } %>









    <% if ((worker.getTwo() != null) && ((worker.getTwo()).equals("B"))) { score ++; %>




    <% } else if (worker.getTwo() != null) { %>



    <% } else { %>


    <% } %>








    <% if ((worker.getThree() != null) && ((worker.getThree()).equals("D"))) { score ++; %>




    <% } else if (worker.getThree() != null) { %>



    <% } else { %>


    <% } %>








    <% if ((worker.getFour() != null) && ((worker.getFour()).equals("C"))) { score ++; %>




    <% } else if (worker.getFour() != null) { %>



    <% } else { %>



    <% } %>








    <% if ((worker.getFive() != null) && ((worker.getFive()).equals("A"))) { score ++; %>




    <% } else if (worker.getFive() != null) { %>



    <% } else { %>


    <% } %>








    <% if ((worker.getSix() != null) && ((worker.getSix()).equals("B"))) { score ++; %>




    <% } else if (worker.getSix() != null) { %>



    <% } else { %>



    <% } %>








    <% if ((worker.getSeven() != null) && ((worker.getSeven()).equals("B"))) { score ++; %>




    <% } else if (worker.getSeven() != null) { %>



    <% } else { %>


    <% } %>








    <% if ((worker.getEight() != null) && ((worker.getEight()).equals("A"))) { score ++; %>




    <% } else if (worker.getEight() != null) { %>



    <% } else { %>


    <% } %>








    <% if ((worker.getNine() != null) && ((worker.getNine()).equals("A"))) { score ++; %>




    <% } else if (worker.getNine() != null) { %>



    <% } else { %>


    <% } %>








    <% if ((worker.getTen() != null) && ((worker.getTen()).equals("D"))) { score ++; %>




    <% } else if (worker.getTen() != null) { %>



    <% } else { %>


    <% } %>


    <%-- Scoring calculations --%>
    <%
    int missed = 10 - score;
    double grade = (double)score/10*100;
    %>




    <%-- Page directive that applies to entire page. --%>
    <%@ page language="java" %>

    <%-- Identifies bean as "worker" and tells the page where to locate the bean. --%>


    <%-- Set bean properties with a wildcard. --%>



    <%-- Scoring --%>

    <%-- Variable declaration in code scriptlet -->
    <% int score = 0; %>





    1. D
    is correct!
    is incorrect!    		Blank X
    Every JavaServer PagesTM
    (JSP)TMsource page is compiled into
    a servlet before it is executed at runtime.

    2. B
    is correct!

    is
    incorrect
    Blank
    X
    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.
    3. D
    is correct!

    is
    incorrect
    Blank X
    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 RequestDispatcher. 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.

    4. C
    is correct!

    is
    incorrect
    Blank X
    Business logic is better contained in a
    JavaBeanTM 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
    "cut-and-paste" mentality tends to prevail when it comes
    to code reuse.

    5.
    A is correct!

    is
    incorrect
    Blank X
    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.

    6.
    B is correct!

    is
    incorrect
    Blank X
    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
    InterfaceTM lookup.
    7.
    B is correct!

    is
    incorrect
    Blank X
    Using Java scriptlets is the accepted method of doing iteration in
    JSPTM 1.0. In
    JSPTM 1.1, a custom tag may be used,
    which will hide the implementation details of the iteration code.

    8.
    A is correct!

    is
    incorrect    		Blank
    X
    The term Page-Centric is used to describe an architecture where
    the initial contact point for the request is a JSP page. An example
    is shown visually below:


    JSP Page-Centric

    9.
    A is correct!

    is
    incorrect
    Blank X
    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.
    10.
    		 D is correct!

    is
    incorrect
    Blank X
    Error pages are invoked when there is an uncaught exception from
    within a particular page. In this case, we mention that the
    validationGaurd() method might throw an exception.
    If this exception is not caught within the page, then we vector
    control to the errorPage, as stipulated in the attribute
    of the given page directive.



    You missed <%= missed %>

    Your score is <%= (int)grade %> percent.

    Source Code


    This quiz used the Page-View with Bean Approach, detailed in HREF="/developer/Books/javaserverpages/">Chapter 12, JSP Archeticure. The first
    page     of the quiz consists of regular HTML with a form that calls HREF="answer.txt">answer.jsp. Answer.jsp requests parameters from the bean,
    in this case, called QuizResponses. The page-view with bean
    approach for this quiz required extra work to write the bean, and it could have been done using the
    page-view approach without a bean, requesting invocation directly from the answer.jsp
    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 page-view with bean approach for
    illustration purposes.

    Back to Quiz







    <%@ include file="footer.html" %>

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