📄 csdn_文档中心_struts快速学习指南6(内部培训教材)-大部分素材来自于《programming jakarta struts》一书.htm
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<TD align=right><A href="http://www.csdn.net/">CSDN</A> - <A
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<TD><B> Struts快速学习指南6(内部培训教材)-大部分素材来自于《Programming
Jakarta Struts》一书</B> lzasp800（原作） </TD></TR>
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<TD align=middle bgColor=#003399><FONT color=#ffffff>关键字</FONT></TD>
<TD width=500> Struts MVC Framework</TD></TR>
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<H4 style="MARGIN: 6pt 0cm 3pt; TEXT-INDENT: 0cm"><A
name=_Toc70351637></A><A name=_Toc69320858><SPAN
style="mso-bookmark: _Toc70351637"><SPAN lang=EN-US
style="mso-bidi-font-family: 宋体"><SPAN
style="mso-list: Ignore"><FONT face=宋体 size=2>1.1.1.1</FONT><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN lang=EN-US><FONT face=宋体
size=2>Action类</FONT></SPAN></SPAN></A></H4>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.6pt; mso-char-indent-count: 1.8"><FONT
color=#354278><TT><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-ansi-language: DA">如果说</SPAN></TT><TT><SPAN
lang=EN-GB
style="FONT-SIZE: 12pt; mso-ansi-language: EN-GB">ActionServlet</SPAN></TT><TT><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-ansi-language: EN-GB">是</SPAN></TT><TT><SPAN
lang=EN-GB
style="FONT-SIZE: 12pt; mso-ansi-language: EN-GB">Struts</SPAN></TT><TT><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-ansi-language: EN-GB">框架的入口，</SPAN></TT><TT><SPAN
lang=EN-GB
style="FONT-SIZE: 12pt; mso-ansi-language: EN-GB">RequestProcessor</SPAN></TT><TT><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-ansi-language: EN-GB">是消化过滤系统，则</SPAN></TT><TT><SPAN
lang=DA
style="FONT-SIZE: 12pt; mso-ansi-language: DA">org.apache.struts.action.Action</SPAN></TT></FONT><SPAN
style="mso-ansi-language: DA"><FONT size=2><FONT
face=宋体>类可以说是整个框架的心脏。他是客户请求和业务操作的连接桥，也可以将其看作是业务操作的客户代理。<SPAN
lang=DA><o:p></o:p></SPAN></FONT></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 1.8"><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>在前面对</FONT></SPAN><FONT color=#354278><TT><SPAN lang=DA
style="FONT-SIZE: 12pt; mso-ansi-language: DA">ReqeustProcessor</SPAN></TT><TT><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-ansi-language: DA">类</SPAN></TT></FONT><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>的学习中，我们了解到一旦确定并得到了一个</FONT></SPAN><TT><SPAN lang=DA
style="FONT-SIZE: 12pt; mso-ansi-language: DA"><FONT
color=#354278>action</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>实例，</FONT></SPAN><TT><SPAN lang=DA
style="FONT-SIZE: 12pt; mso-ansi-language: DA"><FONT
color=#354278>ReqeustProcessor</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>会调用</FONT></SPAN><TT><SPAN lang=DA
style="FONT-SIZE: 12pt; mso-ansi-language: DA"><FONT
color=#354278>action</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>的</FONT></SPAN><TT><SPAN lang=DA
style="FONT-SIZE: 12pt; mso-ansi-language: DA"><FONT
color=#354278>execute()</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>方法处理客户请求，你需要扩展</FONT></SPAN><TT><SPAN lang=DA
style="FONT-SIZE: 12pt; mso-ansi-language: DA"><FONT
color=#354278>action</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>类，并实现它的</FONT></SPAN><TT><SPAN lang=DA
style="FONT-SIZE: 12pt; mso-ansi-language: DA"><FONT
color=#354278>execute()</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>方法，在此方法中添加你自己的处理代码。下面给出是一个示例，这个</FONT></SPAN><TT><SPAN
lang=EN-US style="FONT-SIZE: 12pt"><FONT
color=#354278>action</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT size=2><FONT
face=宋体>用来处理用户的登录请求：<SPAN
lang=DA><o:p></o:p></SPAN></FONT></FONT></SPAN></P>
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vAlign=top width=638><PRE><A name=jakarta-CHP-5-EX-6></A><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体>package com.oreilly.struts.storefront.security;<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体>import java.util.Locale;<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体>import javax.servlet.http.*;<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体>import org.apache.struts.action.*;<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体>import com.oreilly.struts.storefront.customer.view.UserView;<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体>import com.oreilly.struts.storefront.framework.exceptions.BaseException;<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体>import com.oreilly.struts.storefront.framework.UserContainer;<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体>import com.oreilly.struts.storefront.framework.StorefrontBaseAction;<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体>import com.oreilly.struts.storefront.framework.util.IConstants;<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体>import com.oreilly.struts.storefront.service.IStorefrontService;<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; COLOR: green; mso-ansi-language: DA"><FONT face=宋体>/**<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; COLOR: green; mso-ansi-language: DA"><FONT face=宋体> * Implements the logic to authenticate a user for the Storefront application.<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; COLOR: green; mso-ansi-language: DA"><FONT face=宋体> */<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体>public class LoginAction extends StorefrontBaseAction {<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <SPAN style="COLOR: green">/**<o:p></o:p></SPAN></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; COLOR: green; mso-ansi-language: DA"><FONT face=宋体> * Called by the controller when the user attempts to log in to the<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; COLOR: green; mso-ansi-language: DA"><FONT face=宋体> * Storefront application.<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; COLOR: green; mso-ansi-language: DA"><FONT face=宋体> */<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> public ActionForward execute( ActionMapping mapping,<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> ActionForm form,<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> HttpServletRequest request,<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> HttpServletResponse response )<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> throws Exception{<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <SPAN style="COLOR: green"> // The email and password should have already been validated by the ActionForm<o:p></o:p></SPAN></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> String email = ((LoginForm)form).getEmail( );<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> String password = ((LoginForm)form).getPassword( );<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <SPAN style="COLOR: green"> // Log in through the security service<o:p></o:p></SPAN></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> IStorefrontService serviceImpl = getStorefrontService( );<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> UserView userView = serviceImpl.authenticate(email, password);<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <SPAN style="COLOR: green"> // Create a single container object to store user data<o:p></o:p></SPAN></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> UserContainer existingContainer = null;<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> HttpSession session = request.getSession(false);<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> if ( session != null ){<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> existingContainer = getUserContainer(request);<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> session.invalidate( );<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> }else{<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> existingContainer = new UserContainer( );<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> }<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <SPAN style="COLOR: green"> // Create a new session for the user<o:p></o:p></SPAN></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> session = request.getSession(true);<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <SPAN style="COLOR: green"> // Store the UserView in the container and store the container in the session<o:p></o:p></SPAN></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> existingContainer.setUserView(userView);<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> session.setAttribute(IConstants.USER_CONTAINER_KEY, existingContainer);<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> <SPAN style="COLOR: green"> // Return a Success forward</SPAN><o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> return mapping.findForward(IConstants.SUCCESS_KEY);<o:p></o:p></FONT></SPAN></PRE><PRE><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT face=宋体> }<o:p></o:p></FONT></SPAN></PRE><PRE><FONT face=宋体><SPAN lang=DA style="mso-ansi-language: DA">}</SPAN><SPAN lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><o:p></o:p></SPAN></FONT></PRE></TD></TR></TBODY></TABLE>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 1.8"><SPAN
lang=DA style="mso-ansi-language: DA"><o:p><FONT face=宋体
size=2> </FONT></o:p></SPAN></P>
<H5 style="MARGIN: 12pt 0cm 3pt; TEXT-INDENT: 0cm"><A
name=_Toc70351638><SPAN lang=EN-US
style="mso-bidi-font-family: 宋体"><SPAN
style="mso-list: Ignore"><FONT face=宋体 size=3>1.1.1.1.1</FONT><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN lang=EN-US><FONT face=宋体
size=3>Action类缓冲</FONT></SPAN></A></H5>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.6pt; mso-char-indent-count: 1.8"><TT><SPAN
lang=DA style="FONT-SIZE: 12pt; mso-ansi-language: DA"><FONT
color=#354278>Action</FONT></SPAN></TT><FONT face=宋体
size=2>类被设计为线程安全的，在每个应用中每个</FONT><TT><SPAN lang=DA
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