J2EE 5开发中JSP文档与JavaScript文件转换

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Java 310-083是Sun认证的Web组件开发人员 for J2EE 5的考试，这是一项专注于Java 2 Enterprise Edition (J2EE) 5平台上的Web组件开发技能的认证。该考试旨在测试考生对使用现代浏览器标准（如XHTML和CSS）创建可维护且兼容的Web应用程序的能力，以及对JSP (JavaServer Pages) 和JSP文档格式的理解。题目1涉及到了一个从简单JSP页面转换到JSP文档格式的应用场景。在迁移过程中，有一个名为/scripts/screenFunctions.jsp的JSP文件，它生成了一个JavaScript文件。这个JavaScript文件被包含在多个网页中，用于实现特定屏幕的验证功能，使用`<script>`标签引用，如`<script src='/scripts/screenFunctions.jsp' language='javascript' type='application/javascript'></script>`。题目关注的是如何在JSP文档中声明这个JavaScript文件的类型。正确答案是D. `<jsp:directive.page contentType='application/javascript'/>`。这是因为尽管HTML页面已经通过`MIME`类型声明了JavaScript，但在JSP文档中使用`<jsp:directive>`标签明确指定`contentType`属性，可以确保浏览器正确识别并执行JavaScript代码。其他选项如A和B都使用了错误的语法或者标记，C选项`<jsp:document>`是用于定义JSP文档体，而不是声明MIME类型。这个知识点反映了JSP开发中的最佳实践，即清晰地指定文件类型，避免浏览器解析混淆，并确保代码的可维护性和可重用性。同时，这也涵盖了J2EE框架下开发时对跨媒体类型支持的了解，尤其是在处理客户端脚本语言时。通过此类问题，考生应掌握如何正确处理JSP文档的元数据以及与HTML结构的集成，以符合现代Web开发的标准和规范。

Exam Name: Sun Certified Web Component Developer for J2EE 5

Exam Type: Sun

Exam Code: 310-083 Total Questions: 239

Page 16 of 102

Answer: A, B, E

Question: 32

Your management has required that all JSPs be created to generate XHTML-compliant content

and to facilitate that decision, you are required to create all JSPs using the JSP Document format.

In the reviewOrder.jspx page, you need to use several core JSTL tags to process the collection of

order items in the customer's shopping cart. Which JSP code snippets must you use in the

reviewOrder.jspx page?

A. <html xmlns:jsp="http://java.sun.com/JSP/Page"

version="2.0">

<jsp:directive.taglib prefix="c"

uri="http://java.sun.com/jsp/jstl/core" />

</html>

B. <html xmlns:jsp="http://java.sun.com/JSP/Page"

version="2.0"

xmlns:c="http://java.sun.com/jsp/jstl/core">

</html>

C. <jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

version="2.0">

<jsp:directive.taglib prefix="c"

uri="http://java.sun.com/jsp/jstl/core" />

</jsp:root>

D. <jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

version="2.0"

xmlns:c="http://java.sun.com/jsp/jstl/core">

</jsp:root>

Answer: D

Question: 33

Which two JSTL URL-related tags perform URL rewriting? (Choose two.)

A. Url

B. Link

C. Param

D. Import

E. Redirect

Answer: A, E

Question: 34

A custom JSP tag must be able to support an arbitrary number of attributes whose names are

unknown when the tag class is designed. Which two are true? (Choose two.)

A. The <body-content> element in the echo tag TLD must have the value JSP.

B. The echo tag handler must define the setAttribute(String key, String value) method.

C. The <dynamic-attributes>true</dynamic-attributes> element must appear in the echo tag

TLD.

D. The class implementing the echo tag handler must implement the

javax.servlet.jsp.tagext.IterationTag interface.

Exam Name: Sun Certified Web Component Developer for J2EE 5

Exam Type: Sun

Exam Code: 310-083 Total Questions: 239

Page 17 of 102

E. The class implementing the echo tag handler must implement the

F. javax.servlet.jsp.tagext.DynamicAttributes interface.

Answer: C, E

Question: 35

A developer has used this code within a servlet:

62. if(request.isUserInRole("vip")) {

63. // VIP-related logic here

64. }

What else must the developer do to ensure that the intended security goal is achieved?

A. Create a user called vip in the security realm

B. Define a group within the security realm and call it vip

C. Define a security-role named vip in the deployment descriptor

D. Declare a security-role-ref for vip in the deployment descriptor

Answer: D

Question: 36

Given:

3. class MyServlet extends HttpServlet {

4. public void doPut(HttpServletRequest req, HttpServletResponse resp) throws

ServletException,

IOException {

5. // servlet code here ...

26. }

27. }

If the DD contains a single security constraint associated with MyServlet and its only <http

method> tags and <auth-constraint> tags are:

<http-method>GET</http-method>

<http-method>PUT</http-method>

<auth-constraint>Admin</auth-constraint>

Which four requests would be allowed by the container? (Choose four.)

A. A user whose role is Admin can perform a PUT.

B. A user whose role is Admin can perform a GET.

C. A user whose role is Admin can perform a POST.

D. A user whose role is Member can perform a PUT.

E. A user whose role is Member can perform a POST.

F. A user whose role is Member can perform a GET.

Answer: A, B, C, E

Question: 37

What is true about Java EE authentication mechanisms?

A. If your deployment descriptor correctly declares an authentication type of CLIENT_CERT,

your users must have a certificate from an official source before they can use your

application.

B. If your deployment descriptor correctly declares an authentication type of BASIC, the

container automatically requests a user name and password whenever a user starts a new

session.

Exam Name: Sun Certified Web Component Developer for J2EE 5

Exam Type: Sun

Exam Code: 310-083 Total Questions: 239

Page 18 of 102

C. If you want your web application to support the widest possible array of browsers, and you

want to perform authentication, the best choice of Java EE authentication mechanisms is

DIGEST.

D. To use Java EE FORM authentication, you must declare two HTML files in your deployment

descriptor, and you must use a predefined action in the HTML file that handles your user's

Answer: D

Question: 38

If you want to use the Java EE platform's built-in type of authentication that uses a custom HTML

page for authentication, which two statements are true? (Choose two.)

A. Your deployment descriptor will need to contain this tag: <auth-method>CUSTOM</auth-

method>.

B. The related custom HTML login page must be named loginPage.html.

C. When you use this type of authentication, SSL is turned on automatically.

D. You must have a tag in your deployment descriptor that allows you to point to both a login

HTML page and an HTML page for handling any login errors.

E. In the HTML related to authentication for this application, you must use predefined variable

names for the variables that store the user and password values.

Answer: D, E

Question: 39

Given this fragment in a servlet:

23. if(req.isUserInRole("Admin")) {

24. // do stuff

25. }

And the following fragment from the related Java EE deployment descriptor:

812. <security-role-ref>

813. <role-name>Admin</role-name>

814. <role-link>Administrator</role-link>

815. </security-role-ref>

900. <security-role>

901. <role-name>Admin</role-name>

902. <role-name>Administrator</role-name>

903. </security-role>

What is the result?

A. Line 24 can never be reached.

B. The deployment descriptor is NOT valid.

C. If line 24 executes, the user's role will be Admin.

D. If line 24 executes, the user's role will be Administrator.

E. If line 24 executes the user's role will NOT be predictable.

Answer: D

Question: 40

Given the security constraint in a DD:

101. <security-constraint>

102. <web-resource-collection>

剩余101页未读，继续阅读

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