By E. Armstrong et al.

Whilst the first variation of The J2EE™ instructional used to be published, the Java™ 2 Plat-
form, company variation (J2EE) was once the hot child at the block. Modeled after its
forerunner, the Java 2 Platform, common version (J2SE™), the J2EE platform
brought the benefits of “Write as soon as, Run Anywhere™” API compatibility to
enterprise program servers. Now at model 1.4 and with common conform-
ance within the software server market, the J2EE platform has firmly estab-
lished its place because the general for firm software servers.
The J2EE™ instructional, moment version covers the J2EE 1.4 platform and extra. If
you have used the first version of The J2EE™ educational you could detect that the
second variation is triple the dimensions. This reflects a big enlargement within the J2EE plat-
form and the provision of 2 upcoming J2EE applied sciences within the sunlight Java
System software Server Platform variation 8.2, the software program on which the tuto-
rial is predicated.

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Extra resources for The J2EE 1.4 Tutorial

Example text

Also, if you choose to have a session bean access the database, you must use the JDBC API. Java Servlet Technology Java servlet technology lets you define HTTP-specific servlet classes. A servlet class extends the capabilities of servers that host applications that are accessed by way of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers. JavaServer Pages Technology JavaServer Pages™ (JSP™) technology lets you put snippets of servlet code directly into a text-based document.

1447 Foreword When the first edition of The J2EE™ Tutorial was released, the Java™ 2 Platform, Enterprise Edition (J2EE) was the new kid on the block. Modeled after its forerunner, the Java 2 Platform, Standard Edition (J2SE™), the J2EE platform brought the benefits of “Write Once, Run Anywhere™” API compatibility to enterprise application servers. 4 and with widespread conformance in the application server marketplace, the J2EE platform has firmly established its position as the standard for enterprise application servers.

JavaBeans components are not considered J2EE components by the J2EE specification. JavaBeans components have properties and have get and set methods for accessing the properties. JavaBeans components used in this way are typically simple in design and implementation but should conform to the naming and design conventions outlined in the JavaBeans component architecture. J2EE Server Communications Figure 1–2 shows the various elements that can make up the client tier. The client communicates with the business tier running on the J2EE server either directly or, as in the case of a client running in a browser, by going through JSP pages or servlets running in the web tier.

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