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the fifth anniversary of the inaugural javaone conference is upon us, and there can be little doubt that java has had a profound impact on the way that applications are developed and deployed.
over the past few years, sun has continued to refine the java specification, culminating in the groundbreaking release of the java 2 enterprise edition (j2ee). much of suns effort has gone toward the establishment of consistent application programming interfaces and technical infrastructures. the promise of multiplatform interoperability is certainly a heady goal, but its a goal that seems more attainable now than at any time in recent memory. the combination of enterprise javabeans, servlets and javaserver pages offers a powerful platform on which to build applications - but it may not be enough.
the it industry is undergoing some powerful shifts that are beginning to garner press. the days of large, long-term projects lasting several years and with unlimited budgets - such as erp implementations - are fast fading. instead, corporations are favoring short (90-day) development efforts with near-term implementation goals. large, complex applications are being built using a series of smaller projects that can be attacked in more realistic timeframes.
while this shift certainly improves the success-to-failure ratio of it projects, it also requires developers to become much more disciplined about standards. after all, subsequent phases of a project must be able to build off the earlier phases in as seamless a fashion as possible. corporations are finding themselves faced with the task of integrating their code into other applications managed by their partners and customers. this integration often involves the need to move applications to new platforms and environments. the result of these trends is a "write once, build quickly and deploy everywhere" (wobqde) strategy thats quickly transforming the entire industry.
many of the developers building these new applications will hail from the fourth-generation language (4gl) camp. while the j2ee product offers these developers a powerful platform for developing applications, it represents a fairly radical departure from the 4gl world. java itself is a much lower level language for developing applications than traditional 4gl environments. fourth-generation development environments (and languages) provide productivity improvements by handling many routine tasks such as optimistic locking, data caching and application deployment - freeing the developer to concentrate on business logic. the downside to most 4gls has been their proprietary nature; developers needing to "go outside the bounds" of the language often ... 下一页