J2EEplatform consists of a set of service ( Services ) ,the application program interface ( APIs ) and protocol ,the development of its Web based multilayer application provides functional support ,under the J2EE 13specificationfor simple description .
1: JDBC( JavaDatabase Connectivity ) JDBC A PI for access to the different database provides a unified path ,to ODBC, JDBC developers shielding the problems in some detail ,in addition ,JDBC access to the database and is independent of platform .
2: JNDI( Java Name and DirectoryInterface ) JNDI API is used to perform the naming and directory services. It provides a consistent model to the storage and operation of enterprise resource D NS and LDAP Grossiste chinois import,a local file system ,or application server object.
3: EJB( Enterprise J2EE JavaBean ) technology has won wide attention to one of the reasons is that E JB. It provides a framework for the development and implementation of distributed business logic ,which significantly simplifies the scalable and highly complex enterprise applications program development .
EJB specification defines how and when EJB components into their container Line of interaction .The container is responsible for the provision of public services ,such as directory services ,transaction management ,security ,resource pool and fault-tolerance.
But it is worth noting here is ,EJB is not the only path to realize J2EE .J2EE officially due to open ,so that all of the manufacturers to a and EJB parallel mode to achieve the same purpose .
4: RMI( Remote Method Invoke ) remote method request ,the RMI protocol calls a method on a remote object .It uses serialization forms between the client and the server to transfer data . RMI is a E JB using the lower level protocols.
5: JAva IDL / CORBA ( common object request broker architecture is a software to construct a standard ) in J Ava IDL support, developers can put Java and CORBA together. They can create a Java object and making it available at CORBA ORB in the start, or they can also create Java class and other ORB with CORBA object client.
The latter method provides another kind of way ,through which the Java can be used to Your new application and the old system together .6: JSPJSP page by HTML code embedded therein and J AVA code.
The server in the page is the client requests to the Java code is processed ,and then the generated HTML page returned to the client browser .7: JAva Servlet Servlet a small J AVA procedures ,it extends the capabilities of the web server .
As an application server ,when requested to execute ,the script is very similar to Perl and CGI . Servlet provide functions mostly JSP and similar, but different implementation . JSP is usually most of the HTML code embedded in a small the Java code ,and servlet all written by Java and generates a HTML 8: XMLXML is a can be used to set the other markup languages.
It has been used in different business process of sharing data .The development of XML and Java are independent of each other ,however ,it and Java with the same goal is platform independent .
9: JMSMS is used and the object oriented message middleware to communicate with each other .Application program interface .It supports both point-to-point domain ,there is support for publish / subscribe type domain ,and provides the following types of support :messaging ,transaction type of message delivery ,consistent message and a durable subscriber support .
JMS also provides another way to the new system and the old the background system are integrated with each other. 10: JTAJT A defines a standard API ,applications which can access various transaction monitoring .
11: JTSJTS C ORBA OTS transaction monitoring to achieve the basic . JTS provides transaction management method. The transaction manager is in high-level support Java Transaction API specification ,and in lower levels of implementation of OMG OTS specification and Java impression .
JTS transaction manager for application server ,resource management, independent of the application as well as the students resource manager provides services .12: JavaMail JavaMail is used to access the mail server ,it provides a mail server abstract class not only supports SMTP .
Server ,server also supports IMAP .13: JTA ( JavaBeans ActivationFrame Work J avaMail use JAF ) processes the MIME encoded e-mail attachments . MIME byte stream can be converted to a Java object ,most applications need not directly using JAF.
Source by the beats by dre
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