07-09-2014, 10:17 PM
J2EE Design Patterns offer flexible solutions to common software problems encountered in the design and construction of distributed systems for theJ2EE platform. A number of J2EE patterns involve crosscutting structures in the relationship between the roles in the pattern and classes in each instance of the pattern, thus making the resulting components increasingly complex. This complexity is at odds with one of patterns' key goals - to make it easier to build simple, elegant and high-quality systems that work. This papershowsbenefits of usingdifferent pattern categorized in 3-tier of J2EE patterns.