1. XML, Uploading, Importing... Joshua Scotton

2. <% //HTTP 1.1 response.setHeader("Cache-Control","no-store"); //HTTP 1.0 response.setHeader("Pragma","no-cache"); //Stops any problems from proxy servers response.setDateHeader ("Expires", 0); %>

3.  Simplest way is to construct a string: String s = “<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n” + “ \n” + “...\n” + “ \n” + “ ”;

4.  Have to handle special characters ◦ <br/>  No validation so easy to make mistakes

5.  Java API for XML Processing  Provides validation, parsing and generation functionality for XML

6.  DOM - Document Object Model (JDK5+)  SAX - Simple API for XML (JDK5+)  StAX - Streaming API for XML (JDK6+)

7.  The DOM Parser models the entire XML document in memory  Uses the org.w3c.dom.Document model  Tree Nodes ◦ Element ◦ Attr ◦ Text

8. GenerateDOM.class

9. ReadDOM.class

10. ModifyDOM.class

11.  DOM should be avoided for large files as the entire XML file is modelled as a Document in memory, including all Nodes, Elements, Attributes etc.

12.  Faster at reading XML content than DOM.  Stream implementation instead of Document Model  Callback handler object has to be created

13.  Following methods can be overwritten in the Handler class: ◦ startDocument() and endDocument() – methods called at the start and end of an XML document. ◦ startElement() and endElement() – methods called at the start and end of a document element. ◦ characters() – method called with the text contents in between the start and end tags of an XML document element.

14. ReadSAX.class

16.  Upload and import XML test files  Store tests, results and users in database  User login and registration  Users can take tests and view results

17.  Test ◦ TestQuestion  TestAnswer  Result ◦ ResultQuestion

19. Example Quiz Quick Quiz on Java XML Parsers Which of the following is not a built-in Java parser? JDOM DOM SAX DOM loads the entire XML into memory. True or false? True False

20. public class TestBean implements Serializable { private String title; private String description; private List questions; public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } public List getQuestions() { return questions; } public void setQuestions(List questions) { this.questions = questions; } public void addQuestion(TestQuestionBean question) { this.questions.add(question); } }

21. public class TestQuestionBean implements Serializable { private String text; private String id; private List answers; public String getText() { return text; } public void setText(String text) { this.text = text; } public List getAnswers() { return answers; } public void setAnswers(List answers) { this.answers = answers; } public void addAnswer(TestAnswerBean answer) { this.answers.add(answer); } }

22. public class TestAnswerBean implements Serializable { private String text; private String id; private Integer score; public String getText() { return text; } public void setText(String text) { this.text = text; } public Integer getScore() { return score; } public void setScore(Integer score) { this.score = score; }

23. ImportTest.class

24.  Select file (uploadForm.jsp)  Load into UploadBean (importUpload.jsp)  UploadBean -> ImportTest  ImportTest creates TestBean  TestBean stored in Session  Success Message (importUpload.jsp)  Display Test (viewTest.jsp)  index?action=“upload|import|view”

25. File Path:

26. View Test

27. UploadBean.class

28. <% int i=0; for(TestQuestionBean q : test.getQuestions()){ i++; out.println(" Question " + i + ": " + q.getText()+" "); for(TestAnswerBean a : q.getAnswers()){ out.println(" " + a.getText() + " "); } out.println(" "); } %>

30.  connectionName  connectionPassword  connectionURL  driverName  roleNameCol  userCredCol  userNameCol  userRoleTable  userTable

31. CREATE TABLE `QuizMaster`.`user` (`username` TEXT NOT NULL, `password` TEXT NOT NULL ) ENGINE = InnoDB; CREATE TABLE `QuizMaster`.`role` (`username` TEXT NOT NULL, `role` TEXT NOT NULL ) ENGINE = InnoDB;

32.  Will need to install the MySQL driver from http://dev.mysql.com/downloads/connector/j/3.0.html in the tomcat/lib folder http://dev.mysql.com/downloads/connector/j/3.0.html <Realm className="org.apache.catalina.realm.JDBCRealm" driverName="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/quizmaster" connectionName=“username" connectionPassword=“password" userTable="user" userNameCol="username" userCredCol="password" userRoleTable="role" roleNameCol="role" />

33.  admin:admin  guest:guest

34.  admin  User