j2ee框架技术第2章实训题

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1、实训题22-1x使用Action访问ActionContext方式，编写一个网站计数器。步骤：(1)启动MyEclipse,新建Webproject项目,项目名称为“lab02_l(2)添加Struts2框架库(3)双击struts.xml文件,打JFstruts的视图编辑，设计如下：OstrutsjcmlCounterACtion.java］題indexjsp)•?Palette>c/3Extends/Location田PackageQActionU>ResultUInclud

2、e區1JSP區］HTML圖1indexjspurl:/index.jsp

3、Hclass-uaction.CounterActionu>/index.jsp(1)双击Action图标，打开CounterAction.java代码，在execute()方法中加入如卜代码:publicStringexecute(){//TODOAuto-generatedmethodstub//(1)ActionContextActionContextac=ActionConte

4、xt•getContext();intcounter;if(ac.getSession()>get(”counterH)==null)counter=0;elsecounter=Integer.parseInt(String>vaLueO/(ac>getSession()・get(”counterH)));counter++;ac•getSession()•put("counter”，counter);//(2)IoC方式/*HttpSessionsession=request.getSession()

5、;intcounter;if(session.getAttribute(HcounterH)==nu11)counter=0;elsecounter=Integer.parselnt(String.valueOf(session.getAttribute(”counter'1)));counter++;session•setAttribute("counter'1，counter);*///(3)非：EoC方式/*HttpServletRequestrequest二ServletActionContex

6、t.getRequest();HttpSessionsession=request.getSession();intcounter;if(session.getAttribute("counterM)==null)counter=0;elsecounter=Integer.parselnt(String.valueOf(session.getAttribute(”countern)));counter++;session•setAttribute(Hcounter'counter);*/returnS

7、UCCESS;}(1)修改index.jsp页面,加入如下代码：<%@taglibprefixes"uri="/struts-tags"%>

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8、诃(2)运行WebApplication程序，运行结果如卜•图所示。http://chen:8080/lab02/共计13人访问注：采用IoC方式的要修改CounterActionjava代码publiccl

9、assCounterActionextendsActionSupportimplementsServletRequestAware{//(2)IoC方式//(2)IoC方式privateHttpServletRequestrequest;//(2)IoC方式^OverridepublicvoidsetServletRequest(HttpServletRequestrequest){//TODOAuto-generatedmethodstu