By Gregory Brill
CodeNotes offers the main succinct, actual, and quickly approach for a developer to ramp up on a brand new expertise or language. in contrast to different programming books, CodeNotes drills all the way down to the center elements of a know-how, targeting the major components wanted in an effort to know it fast and enforce it instantly. it's a specified source for builders, filling the space among entire manuals and pocket reference.CodeNotes for J2EE: EJB, JDBC, JSP, and Servlets introduces Java builders to the major database and net improvement applied sciences of the Java 2 Platform, firm version. The JDBC API, JavaServer Pages, and Servlet frameworks are lined separately with examples that exhibit how those applied sciences interact to create strong, dynamic web-based purposes. The ebook additionally explains how one can use company JavaBeans to create huge, dispensed, scalable applications.This version of CodeNotes includes:-A international evaluate of a know-how and rationalization of what difficulties it may be used to solve-Real-world examples-"How and Why," "Design Notes," and "Bugs and Caveats" sections that offer tricks, methods, workarounds, and tips about what may be taken benefit of or avoided-Instructions and classroom-style tutorials all through from professional running shoes and software program developersVisit www.codenotes.com for updates, resource code templates, entry to message forums, and dialogue of particular issues of CodeNotes authors and different developers.Every CodeNotes identify is written and reviewed by means of a crew of business software program builders and know-how specialists. See "About the Authors" at first of the e-book for additional info.
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Additional info for CodeNotes for J2EE: EJB, JDBC, JSP, and Servlets
Input parameters are set the same way as for a PreparedStatement. Use the appropriate setXXXX() method for the datatype, then pass in the parameter number and the value. Types data type identifier. INTEGER, etc. Once you have passed in all IN parameters and registered all OUT parameters, you will be able to execute the statement using the execute() command. After execution, you can access the results using getXXXX() methods. The getXXXX() methods are data-type-specific and require the parameter number.
For other SQL statements, the executeUpdate() method returns a value of 0 for successful execution, although you should use the getWarnings() method to check for any nonfatal exceptions. ExecuteQuery If you are requesting data from the database, or expect data to be returned by your statement, you need to use executeQuery(). This method is used almost exclusively for SELECT statements or calls to stored procedures that have fixed arguments. The return value is always a ResultSet object. Execute The execute() command is a generic method for executing SQL of unknown type.
Inside the WEB-INF directory, create a directory called classes (C:\webdev\WEB-INF\classes) and another called lib (C:\webdev\WEB-INF\lib). You will use these directories to store the Java code that will support your web pages. The classes directory is for Servlets, JavaBeans, and other compiled Java code, while the lib directory is for JAR packages. 5. xml. This configuration file is used to identify the application. xml file 6. xml file. Configuring the Server Once you have built your application directory and configuration file, you must configure the server to recognize the new application.