📄 csdn_文档中心_struts快速学习指南4(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4(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 Framework MVC</TD></TR>
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<H4
style="MARGIN: 6pt 0cm 3pt; mso-line-height-alt: 12.0pt; mso-pagination: none"><A
name=_Toc69400240></A><A name=_Toc69320857><SPAN
style="mso-bookmark: _Toc69400240"><SPAN lang=EN-US><FONT face=Arial
size=5>RequestProcessor</FONT></SPAN></SPAN></A><SPAN
style="mso-bookmark: _Toc69320857"><SPAN
style="mso-bookmark: _Toc69400240"><SPAN
style="FONT-FAMILY: 黑体; mso-ascii-font-family: Arial"><FONT
size=5>类</FONT></SPAN></SPAN></SPAN></H4>
<P class=doctext
style="MARGIN: auto 0cm; TEXT-INDENT: 18pt; mso-char-indent-count: 1.8"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">前面提到过，当</SPAN><TT><SPAN
lang=EN-US style="FONT-SIZE: 10pt"><FONT
color=#354278>ActionServlet</FONT></SPAN></TT><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">接收到客户请求后，会进行一连串的初始化操作，然后，就会将客户请求转交给合适的处理器进行处理，这个合适的处理器就是</SPAN><TT><SPAN
lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT
color=#354278>org.apache.struts.action.RequestProcessor</FONT></SPAN></TT><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">或其子类的一个实例</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 10pt">(</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">根据</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 10pt">Struts</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">配置文件中的配置</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 10pt">)</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。提供了默认实现，如果需要自定义这些行为，可以重载这个类定义自己的处理行为，当你想要自定义操作时，</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 10pt">Struts</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">推荐你重载这个类而不是</SPAN><TT><SPAN
lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT
color=#354278>ActionServlet</FONT></SPAN></TT><TT><SPAN
style="FONT-SIZE: 10pt; COLOR: windowtext; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-ansi-language: DA">。</SPAN></TT><TT><SPAN
lang=DA
style="FONT-SIZE: 10pt; COLOR: windowtext; mso-ansi-language: DA"><o:p></o:p></SPAN></TT></P>
<P class=doctext
style="MARGIN: auto 0cm; TEXT-INDENT: 18pt; mso-char-indent-count: 1.8"><TT><SPAN
style="FONT-SIZE: 10pt; COLOR: windowtext; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-ansi-language: DA">下面的代码片断提供了</SPAN></TT><TT><SPAN
lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT
color=#354278>RequestProcessor</FONT></SPAN></TT><TT><SPAN
style="FONT-SIZE: 10pt; COLOR: windowtext; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-ansi-language: DA">的默认行为实现代码：</SPAN></TT><TT><SPAN
lang=DA
style="FONT-SIZE: 10pt; COLOR: windowtext; mso-ansi-language: DA"><o:p></o:p></SPAN></TT></P>
<TABLE class=MsoTableGrid
style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-alt: solid windowtext .5pt; mso-yfti-tbllook: 480; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext"
cellSpacing=0 cellPadding=0 border=1>
<TBODY>
<TR style="mso-yfti-irow: 0; mso-yfti-lastrow: yes">
<TD
style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 478.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt"
vAlign=top width=638>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2>public void process(HttpServletRequest request,
HttpServletResponse response) <o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> throws IOException, ServletException
{<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> <o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><FONT
size=2><SPAN lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"> </SPAN><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: green; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA">
// Wrap multipart requests with a special
wrapper<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> request =
processMultipart(request);<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> <o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><FONT
size=2><SPAN lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"> </SPAN><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: green; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA">
// Identify the path component we will use to select a
mapping<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> String path = processPath(request,
response);<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> if (path == null)
{<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2>
return;<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> }<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> if (log.isInfoEnabled( ))
{<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> log.info("Processing a
'" + request.getMethod( ) +<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> "' for path
'" + path + "'");<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> }<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"><FONT
size=2> <o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><FONT
size=2><SPAN lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: #354278; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA"> </SPAN><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: green; FONT-FAMILY: 'Courier New'; mso-ansi-language: DA">
// Select a Locale for the current user if
requested<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal; TEXT-ALIGN: justify; mso-pagination: widow-orphan; tab-stops: 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN
lang=DA
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