摘要：
the model-view-controller (mvc) pattern is one of the most commonly used patterns for designing complex web applications.
several mvc frameworks (e.g., struts) exist for building servlet-based web......
摘要：
why do we need cactus?
enterprise javabeans provide many advantages. but
each server-side/back-end developer knows that development of ejbs is sometimes
painful, time-consuming, and requir......
Application Servers: Part 2 @ JDJlegacy systems are too important for java developers to ignore, but neednt be a hassle to access. these systems include everything from packaged applications like sap and peoplesoft to aging home-grown mainframe systems and external data sources such as edi. despite what you may personally think about some of the more elderly of these systems, they play critical roles in many organizations and will continue to for years to come.
in this column, the second of three in the application server series, well look at how developers handle legacy systems. previously we discussed how developers accessed sql results sets through the application server.
as developers we frequently want to bring a result set from the legacy system to the application server where we make it available for reading and updating. in fact, we may want to integrate any data into the application server as a result set. for instance, java developers may have to incorporate data from edi or, more recently, xml, the new, increasingly popular standard for structured data exchange over the web.
xml (extensible markup language) is particularly interesting. it is a tag-based markup language like html except that it can describe not only how data is to be displayed on the web, intranet or extranet, but what the data ac... 下一页
摘要：its often very difficult to apply extensions or patches to an
existing application. consider the steps required. first, a
software developer has to modify some source code. then a platform
engineer......
