DT2113InternetApplicationDevelopment.ppt

  1. 1、本文档共34页,可阅读全部内容。
  2. 2、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
  3. 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载
  4. 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
查看更多
DT2113InternetApplicationDevelopment.ppt

DT211/3 Internet Application Development The JSTL EL allows these objects to be accessed as ‘Implicit Variables’ Implicit variable are just pre-agreed fixed variable names that can be used in JSTL Expressions --? Think of as “variables that are automatically available to your JSP page”.. Setting up JSTL in a web application JSTL is provided as part of Tomcat 5 Ensure the two JSTL .jar files are copied into the WEB-INF\lib directory of your web application Ensure the taglib directive(s) is in your JSP page Comparing JSTL vs Scriptlets /isapi/product_id~{27F6F199-F5FD-474C-AC7F-B3FC2C1F57B6}/st~{94C03A97-1188-4875-8A06-17743BA224B7}/session_id~{6A766315-391B-4F55-9AFB-B5425F6196C5}/content/articlex.asp JSTL removes complexity by using tags instead of java code (abstraction) JSP pages using JSTL usually easier to maintain JSTL allows HTML ‘tag’ developers to ‘program’ JSTL often more difficult to debug Note: Using JSTL does not eliminate scriplets entirely.. may still need them sometimes for more complex logic Info on JSTL 1. Java Server Pages by Hans Bergsten – full reference on all JSTL tags in the Appendix. 2. Sun tutorial. Contains examples. Chapter 17 is on JSTL at: /webservices/docs/1.1/tutorial/doc/index.html 3. Sun’s JSTL 1.0 tag specification on distrib. Good for definition of each tag. Poor on examples. * JSP: Actions elements and JSTL Introduction Previously, identified that JSP provides a variety of techniques to enable dynamic processing: Directive elements Action elements and JSTL Scripting elements Java Beans So far, have looked at these JSP Action elements Action elements are an important syntax element in JSP They are represented by tags (as is HTML) They assist JSP developers to develop in tags rather than scriplet programming Instead of %, they just use the character (like HTML) prefix:action_name body /prefix:action_name JSP Action elements JSP tags have a “start tag”, a “tag body” and an “end tag”. The start

文档评论(0)

tangtianxu1 + 关注
实名认证
内容提供者

该用户很懒,什么也没介绍

1亿VIP精品文档

相关文档