J2EE技术规范

J2EE技术规范

J2EE技术规范大全

良好的技术规范将带来很大的便利，那么J2EE有哪些技术规范，下面我就为大家介绍11种J2EE(J2EE培训 )的技术规范。

1)JDBC(Java(Java教程 Java培训 ) Database Connectivity):

JDBC API为访问不同的数据库提供了一种统一的途径，象ODBC一样，JDBC对开发者屏蔽了一些细节问题，另外，JDCB对数据库的访问也具有平台无关性。

2)JNDI(Java Name and Directory Interface):

JNDI API被用于执行名字和目录服务。它提供了一致的模型来存取和操作企业级的资源如DNS和LDAP，本地文件系统，或应用服务器中的对象。

3)EJB(Enterprise JavaBean):

J2EE技术之所以赢得某体广泛重视的原因之一就是EJB。它们提供了一个框架来开发和实施分布式商务逻辑，由此很显著地简化了具有可 伸缩性和高度复杂的企业级应用的开发。EJB规范定义了EJB组件在何时如何与它们的容器进行交互作用。容器负责提供公用的服务，例如目录服务、事务管 理、安全性、资源缓冲池以及容错性。但这里值得注意的是，EJB并不是实现J2EE的唯一途径。正是由于J2EE的开放性，使得有的厂商能够以一种和EJB平行的方式来达到同样的目的。

4)RMI(Remote Method Invoke):

正如其名字所表示的那样，RMI协议调用远程对象上方法。它使用了序列化方式在客户端和服务器端传递数据。RMI是一种被EJB使用的更底层的协议。

5) Java IDL/CORBA:

在Java IDL的支持下，开发人员可以将Java和CORBA集成在一起。他们可以创建Java对象并使之可在CORBA ORB中展开, 或者他们还可以创建Java类并作为和其它ORB一起展开的CORBA对象的客户。后一种方法提供了另外一种途径，通过它Java可以被用于将你的新的应用和旧的系统相集成。

6) JSP(Java Server Pages):

JSP页面由HTML代码和嵌入其中的Java代码所组成。服务器在页面被客户端所请求以后对这些Java代码进行处理，然后将生成的HTML页面返回给客户端的浏览器。

7)Java Servlet:

Servlet是一种小型的Java程序，它扩展了Web服务器的功能。作为一种服务器端的应用，当被请求时开始执行，这和CGI Perl脚本很相似。Servlet提供的功能大多与JSP类似，不过实现的方式不同。JSP通常是大多数HTML代码中嵌入少量的Java代码，而servlets全部由Java写成并且生成HTML。

8) XML(Extensible Markup Language):

XML是一种可以用来定义其它标记语言的语言。它被用来在不同的商务过程中共享数据。XML的发展和Java是相互独立的，但是，它和Java具有的相同目标正是平台的独立性。通过将Java和XML的组合，您可以得到一个完美的具有平台的独立性的'解决方案。

9)JMS(Java Message Service):

MS是用于和面向消息的中间件相互通信的应用程序接口(API)。它既支持点对点的域，有支持发布/订阅(publish/subscribe)类型的 域，并且提供对下列类型的支持：经认可的消息传递,事务型消息的传递，一致性消息和具有持久性的订阅者支持。JMS还提供了另一种方式来对您的应用与旧的 后台系统相集成。

10)JTA(Java Transaction Architecture):

JTA定义了一种标准的API，应用系统由此可以访问各种事务监控。

11)JTS(Java Transaction Service):

JTS是CORBA OTS事务监控的基本的实现。JTS规定了事务管理器的实现方式。该事务管理器是在高层支持Java Transaction API (JTA)规范，并且在较底层实现OMG OTS specification的Java映像。JTS事务管理器为应用服务器、资源管理器、独立的应用以及通信资源管理器提供了事务服务。

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英语高手帮我翻译……高分!我在线等

May carry on the inspection through on-line test teacher to student's study, understood that student's study effect, provides the basis for the improvement teaching; But the student may through on-line self-test understand that he keeps abreast of the situation to the course content, enhances the study interest; To tries the question bank the prompt renewal and the maintenance, guarantees tries in the question bank the test question to adapt the teaching request well, when test may reduce teacher to examine test papers the work load, raises teacher's working efficiency. This article designed one with to realize the method based on the J2EE on-line test system's design, and has carried on the attempt according to this design in the students test.

This system is the attempt with JSP in the network an construction dynamic online test platform, passes through to the topic investigation and study as well as the feasibility analysis, this system design is uses MyEclipse to take the development environment, JSP takes the development kit, based on the B/S structural design plan, based on the Web pattern's development thought that 2000 develops the platform take SQL Server as the database, the Tomcat achievement applies server's on-line test system. Divides into the onstage and the back partition, the onstage part by the user use, mainly includes the user registration, individual document management, online test, functions and so on result inquiry; The back partition uses by the manager, mainly includes the test question the additions and deletions to look up changes, group volume function, functions and so on automatic grading.

Examine by the fact that the have an exam teacher may be in progress to student's study about on the net , know student's study about effect , be that improve teaching and learning provides a basis; But, the student may by the fact that condition, improves the interest studying on the net from measuring grasping knowing self to content of courses; To timely item pool renewal and upkeep, ensure that examination questions in item pool adapts to teaching call for much better, may cut down teacher's taking place going over examination papers right away during the period of have an exam amount of work , the availability improving a teacher. A design and realization method fixing have an exam system owing to the J2EE net the main body of a book has been designed, and according to should design the trial having been in progress in student have an exam. This system is to attempt to use JSP online have an exam platform mounting a frame development in network , that system designs capital is to adopt MyEclipse to be exploitation environment , JSP is exploitation implement course surveying and feasibility analysis to the problem,owing to B/S structure design plan , owing to pattern Web exploitation thought, 2000 is that the data base develops platform with SQL Server , Tomcat has caught with a net have an exam system as applying a server's. Be a proscenium and backstage part mark, the proscenium part uses , includes mainly the consumer register by consumer , the individual data manages, in line have an exam, achievement inquiry waits for a function; The backstage part is put into use by administrative person , the additions and deletions including examination questions mainly is checked switching over to roll up a function set ,the automation grades waiting for a function.

机器翻译的,不用选为答案,谢谢

Teachers through the online examinations for students learning to assess and understand the effect of learning, to provide a basis for improving teaching; and students learn through online self-test their own grasp of the content of teaching situation, enhance their interest in learning; to update test database and maintenance, to ensure that the test questions library to better meet the teaching requirements, the examination can be reduced when the marking of the workload of teachers, improve teacher productivity. In this paper, the design of a J2EE-based online examination system design and implementation, and in accordance with the design students were trying to test.

The system is trying to use JSP in the network structure of a dynamic online test platform, after the subject of research and feasibility analysis, design of the system is used as the MyEclipse development environment, JSP as a development tool, based on B / S structure design , Web-based model of development thinking to SQL Server 2000 database development platform, Tomcat application server as a web-based examination system. Is divided into front and back-office part of the future use by the users, including user registration, personal information management, online examinations, inquiries and other functions results; background in part by the administrators, including questions to check the additions and deletions, Paper feature, automatic score functions.

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