jsp 计算机 外文翻译 外文文献 英文文献 Struts 一种开源MVC的实现.doc

附件2：外文原文 出自《IBM?System?Journal,2006,44(2):33-37》??作者：?Malcolm?Davis Struts——An?Open-source?MVC?Implementation This?article?introduces?Struts,?a?Model-View-Controller?implementation?that?uses?servlets?and?JavaServer?Pages?(JSP)?technology.?Struts?can?help?you?control?change?in?your?Web?project?and?promote?specialization.?Even?if?you?never?implement?a?system?with?Struts,?you?may?get?some?ideas?for?your?future?servlets?and?JSP?page?implementation? Introduction? Kids?in?grade?school?put?HTML?pages?on?the?Internet.?However,?there?is?a?monumental?difference?between?a?grade?school?page?and?a?professionally?developed?Web?site.?The?page?designer?(or?HTML?developer)?must?understand?colors,?the?customer,?product?flow,?page?layout,?browser?compatibility,?image?creation,?JavaScript,?and?more.?Putting?a?great?looking?site?together?takes?a?lot?of?work,?and?most?Java?developers?are?more?interested?in?creating?a?great?looking?object?interface?than?a?user?interface.?JavaServer?Pages?(JSP)?technology?provides?the?glue?between?the?page?designer?and?the?Java?developer.?? If?you?have?worked?on?a?large-scale?Web?application,?you?understand?the?term?change.?Model-View-Controller?(MVC)?is?a?design?pattern?put?together?to?help?control?change.?MVC?decouples?interface?from?business?logic?and?data.?Struts?is?an?MVC?implementation?that?uses?Servlets?2.2?and?JSP?1.1?tags,?from?the?J2EE?specifications,?as?part?of?the?implementation.?You?may?never?implement?a?system?with?Struts,?but?looking?at?Struts?may?give?you?some?ideas?on?your?future?Servlets?and?JSP?implementations.? Model-View-Controller?(MVC)? JSP?tags?solved?only?part?of?our?problem.?We?still?have?issues?with?validation,?flow?control,?and?updating?the?state?of?the?application.?This?is?where?MVC?comes?to?the?rescue.?MVC?helps?resolve?some?of?the?issues?with?the?single?module?approach?by?dividing?the?problem?into?three?categorie:?? Model?? The?model?contains?the?core?of?the?applications?functionality.?The?model?encapsulates?the?state?of?the?