Download CodeNotes for J2EE: EJB, JDBC, JSP, and Servlets by Gregory Brill PDF

By Gregory Brill

CodeNotes offers the main succinct, exact, and quick manner for a developer to ramp up on a brand new know-how or language. in contrast to different programming books, CodeNotes drills right down to the middle facets of a know-how, targeting the main components wanted which will realize it fast and enforce it instantly. it's a exact source for builders, filling the space among finished manuals and pocket reference.CodeNotes for J2EE: EJB, JDBC, JSP, and Servlets introduces Java builders to the most important database and internet improvement applied sciences of the Java 2 Platform, company version. The JDBC API, JavaServer Pages, and Servlet frameworks are lined separately with examples that exhibit how those applied sciences interact to create powerful, dynamic web-based functions. The publication additionally explains tips on how to use company JavaBeans to create huge, dispensed, scalable applications.This version of CodeNotes includes:-A international review of a expertise 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 could be taken good thing about or avoided-Instructions and classroom-style tutorials all through from specialist 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 name is written and reviewed through a staff of industrial software program builders and know-how specialists. See "About the Authors" initially of the booklet for additional information.

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Extra resources for CodeNotes for J2EE: EJB, JDBC, JSP, and Servlets

Example text

Type 4 drivers are 100 percent Java drivers used primarily with thin Java clients or applets. These Drivers may require a minimal client-side installation. JDBC . 31 All four types of drivers implement the same interfaces and provide the same functionality. However, choosing an appropriate driver type is the first step in choosing the correct driver. Choosing a Driver The standard J2EE installation comes with an experimental JDBCODBC bridge driver. You can certainly use this driver to get started.

The datasource may be a database name, a TNSNames entry (for Oracle), an ODBC data source (for JDBC-ODBC bridge), or some other string that includes sufficient information to connect to the data- 34 . CodeNotes® for J2EE base. These URL formats are driver-specific, which generally means they are also database-specific. Several common URL formats are illustrated in the Examples section. Connection Pooling A connection pool is a collection of premade Connection objects. Rather than asking the DriverManager for a new Connection, you ask the connection pool.

Because the syntax varies between databases, JDBC supports these features through an escape syntax that is identical to the escape syntax used with ODBC. Each JDBC driver is responsible for translating this escape syntax into DBMS-specific syntax, assuming the underlying database supports the requested features. Eventually, when enough databases support 28 . CodeNotes® for J2EE SQL-92 (one would hope this will happen as soon as SQL 1999 is completed), the escape syntax will become unnecessary. g.

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