📄 csdn_文档中心_struts快速学习指南9(内部培训教材)-大部分素材来自于《programming jakarta struts》一书.htm
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style="FONT-SIZE: 10pt; mso-ansi-language: EN-GB">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'; mso-ansi-language: EN-GB">主分发的一部分，它提供基于规则的校验，对于常用的校验，如必填项目，</SPAN><SPAN
lang=EN-GB
style="FONT-SIZE: 10pt; mso-ansi-language: EN-GB">email</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-ansi-language: EN-GB">，电话等等提供了现成的规则，只需要通过配置文件进行配置即可。关于</SPAN><TT><SPAN
lang=DA style="FONT-SIZE: 10pt; mso-ansi-language: DA"><FONT
color=#354278>Struts Validator</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">框架的详细介绍，见后续章节。</SPAN></TT><SPAN
lang=DA
style="FONT-SIZE: 10pt; mso-ansi-language: DA"><o:p></o:p></SPAN></P>
<H4 style="MARGIN: 6pt 0cm 3pt; TEXT-INDENT: 0cm"><SPAN lang=DA
style="mso-ansi-language: DA; mso-bidi-font-family: 宋体"><SPAN
style="mso-list: Ignore"><FONT face=宋体 size=2>1.1.1.2</FONT><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN lang=DA
style="mso-ansi-language: DA"><SPAN style="mso-spacerun: yes"><FONT
face=宋体 size=2> </FONT></SPAN><A name=_Toc70351653></A><A
name=_Toc69320872><SPAN style="mso-bookmark: _Toc70351653"><FONT
face=宋体 size=2>Validator </FONT></SPAN></A></SPAN><FONT size=2><FONT
face=宋体><SPAN style="mso-bookmark: _Toc69320872"><SPAN
style="mso-bookmark: _Toc70351653"><SPAN
style="mso-ansi-language: DA">框架</SPAN></SPAN></SPAN><SPAN lang=DA
style="mso-ansi-language: DA"><o:p></o:p></SPAN></FONT></FONT></H4>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 1.8"><FONT
size=2><FONT face=宋体><SPAN lang=DA
style="mso-ansi-language: DA">Struts</SPAN><SPAN
style="mso-ansi-language: DA">允许在</SPAN></FONT></FONT><TT><SPAN
lang=EN-US style="FONT-SIZE: 12pt; LAYOUT-GRID-MODE: both"><FONT
color=#354278>ActionForm</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>的</FONT></SPAN><TT><SPAN lang=EN-US
style="FONT-SIZE: 12pt; LAYOUT-GRID-MODE: both"><FONT
color=#354278>validator</FONT></SPAN></TT><FONT size=2><FONT
face=宋体><SPAN lang=DA style="mso-ansi-language: DA">()</SPAN><SPAN
style="mso-ansi-language: DA">方法中添加校验代码，对用户输入的数据进行规则校验，这能很好地工作，但是，这存在一些限制，举个简单的例子，一个必填项现在不是必填项了，要满足这个简单的需求就需要更改</SPAN></FONT></FONT><TT><SPAN
lang=EN-US style="FONT-SIZE: 12pt; LAYOUT-GRID-MODE: both"><FONT
color=#354278>ActionForm</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>类的</FONT></SPAN><TT><SPAN lang=EN-US
style="FONT-SIZE: 12pt; LAYOUT-GRID-MODE: both"><FONT
color=#354278>validator()</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT size=2><FONT
face=宋体>方法，再进行重新编译，很麻烦。本节我们来学习<SPAN
lang=DA>Validator</SPAN>框架，看它是如何解决校验问题的。<SPAN
lang=DA><o:p></o:p></SPAN></FONT></FONT></SPAN></P>
<H5 style="MARGIN: 12pt 0cm 3pt; TEXT-INDENT: 0cm"><A
name=_Toc70351654></A><A name=_Toc69320873><SPAN
style="mso-bookmark: _Toc70351654"><SPAN lang=DA
style="mso-ansi-language: DA; mso-bidi-font-family: 宋体"><SPAN
style="mso-list: Ignore"><FONT face=宋体 size=3>1.1.1.2.1</FONT><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN lang=DA
style="mso-ansi-language: DA"><FONT face=宋体
size=3>Validator</FONT></SPAN></SPAN></A><FONT size=3><FONT
face=宋体><SPAN style="mso-bookmark: _Toc69320873"><SPAN
style="mso-bookmark: _Toc70351654"><SPAN
style="mso-ansi-language: DA">的安装、配置</SPAN></SPAN></SPAN><SPAN
lang=DA
style="mso-ansi-language: DA"><o:p></o:p></SPAN></FONT></FONT></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; LAYOUT-GRID-MODE: both; mso-ansi-language: DA"><FONT
color=#354278>Validator</FONT></SPAN></TT><FONT size=2><SPAN
style="mso-ansi-language: DA"><FONT face=宋体>目前是</FONT></SPAN><SPAN
lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: DA">Jakarta
Commons </SPAN><SPAN
style="LAYOUT-GRID-MODE: both; COLOR: black; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: DA"><FONT
face=宋体>项目的一部分，它也被包含在</FONT></SPAN><SPAN lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: DA">Struts</SPAN><SPAN
style="LAYOUT-GRID-MODE: both; COLOR: black; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: DA"><FONT
face=宋体>主分发里面，可以直接使用</FONT></SPAN><SPAN lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: DA">Struts</SPAN><SPAN
style="LAYOUT-GRID-MODE: both; COLOR: black; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: DA"><FONT
face=宋体>中自带的</FONT></SPAN></FONT><TT><SPAN lang=DA
style="FONT-SIZE: 12pt; LAYOUT-GRID-MODE: both; mso-ansi-language: DA"><FONT
color=#354278>Validator</FONT></SPAN></TT><FONT size=2><SPAN
style="LAYOUT-GRID-MODE: both; COLOR: black; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: DA"><FONT
face=宋体>库，也可以去网站上下载</FONT></SPAN><SPAN lang=DA
style="LAYOUT-GRID-MODE: both; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: DA"><A
href="http://jakarta.apache.org/commons/" target=_blank><SPAN
style="COLOR: #003399">http://jakarta.apache.org/commons/</SPAN></A></SPAN><FONT
face=宋体><SPAN
style="LAYOUT-GRID-MODE: both; COLOR: black; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: DA">。</SPAN><SPAN
lang=DA
style="mso-ansi-language: DA"><o:p></o:p></SPAN></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><TT><SPAN lang=DA
style="FONT-SIZE: 12pt; LAYOUT-GRID-MODE: both; mso-ansi-language: DA"><FONT
color=#354278>Validator</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>需要一些其它库的支持，例如</FONT></SPAN><TT><SPAN lang=DA
style="FONT-SIZE: 12pt; LAYOUT-GRID-MODE: both; mso-ansi-language: DA"><FONT
color=#354278>Jakarta ORO</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT size=2><FONT
face=宋体>，不过没关系，<SPAN lang=DA>Struts</SPAN>分发包里面都包含了，你只需要按照第<SPAN
lang=DA>2</SPAN>章介绍的将<SPAN lang=DA>Struts</SPAN>安装到你的应用中，就一切<SPAN
lang=DA>ok</SPAN>。<SPAN
lang=DA><o:p></o:p></SPAN></FONT></FONT></SPAN></P>
<H6 style="MARGIN-LEFT: 0cm; TEXT-INDENT: 0cm"><A
name=_Toc70351655></A><A name=_Toc69320874><SPAN
style="mso-bookmark: _Toc70351655"><SPAN lang=DA
style="mso-ansi-language: DA; mso-bidi-font-family: 宋体"><SPAN
style="mso-list: Ignore"><EM><FONT face=宋体
size=3>1.1.1.2.1.1</FONT></EM><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN style="mso-ansi-language: DA"><EM><FONT
face=宋体 size=3>配置校验规则</FONT></EM></SPAN></SPAN></A><SPAN lang=DA
style="mso-ansi-language: DA"><o:p></o:p></SPAN></H6>
<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>前面提到过，</FONT></SPAN><TT><SPAN lang=DA
style="FONT-SIZE: 12pt; LAYOUT-GRID-MODE: both; mso-ansi-language: DA"><FONT
color=#354278>Validator</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT face=宋体
size=2>是通过校验规则来实施校验，这些校验规则被配置在配置文件中，这意味着不需要修改源代码就可以方便地更改校验规则，是不是感觉很不错？</FONT></SPAN><TT><SPAN
lang=DA
style="FONT-SIZE: 12pt; LAYOUT-GRID-MODE: both; mso-ansi-language: DA"><FONT
color=#354278>Validator</FONT></SPAN></TT><SPAN
style="mso-ansi-language: DA"><FONT size=2><FONT
face=宋体>所需要的配置文件有两个：<SPAN class=docemphasis1><SPAN
lang=DA><EM>validation-rules.xml</EM></SPAN></SPAN>和<SPAN
class=docemphasis1><EM><SPAN lang=DA>validation.xml</SPAN>。<SPAN
lang=DA><o:p></o:p></SPAN></EM></SPAN></FONT></FONT></SPAN></P>
<H6 style="MARGIN-LEFT: 0cm; TEXT-INDENT: 0cm"><A
name=_Toc70351656></A><A name=_Toc69320875><SPAN
style="mso-bookmark: _Toc70351656"><SPAN lang=DA
style="mso-ansi-language: DA; mso-bidi-font-family: 宋体"><SPAN
style="mso-list: Ignore"><EM><FONT face=宋体
size=3>1.1.1.2.1.2</FONT></EM><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN lang=DA
style="mso-ansi-language: DA"><EM><FONT face=宋体
size=3>validation-rules.xml</FONT></EM></SPAN></SPAN></A><SPAN
lang=DA style="mso-ansi-language: DA"><o:p></o:p></SPAN></H6>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 1.8"><SPAN
style="mso-ansi-language: DA"><FONT size=2><FONT face=宋体>在<SPAN
class=docemphasis1><SPAN
lang=DA><EM>validation-rules.xml</EM></SPAN></SPAN><SPAN
class=docemphasis1><SPAN
style="FONT-STYLE: normal; mso-bidi-font-style: italic">文件中配置了一些全局性的校验规则，使得你在应用程序中使用校验而不用关注实现细节。这个配置文件是</SPAN></SPAN></FONT></FONT></SPAN><TT><SPAN
lang=DA
style="FONT-SIZE: 12pt; LAYOUT-GRID-MODE: both; mso-ansi-language: DA"><FONT
color=#354278>Validator</FONT></SPAN></TT><FONT face=宋体><FONT
size=2><SPAN class=docemphasis1><SPAN
style="FONT-STYLE: normal; mso-ansi-language: DA; mso-bidi-font-style: italic">框架自带的，可以用在所有<SPAN
lang=DA>Struts</SPAN>应用中。它默认配置了许多很常用的规则，一般来说，不用去更改它，除非需要扩展或修改这些默认的校验规则。</SPAN></SPAN><SPAN
lang=DA
style="mso-ansi-language: DA"><o:p></o:p></SPAN></FONT></FONT></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="MARGIN: 0cm 0cm 0pt"><FONT
face=宋体><FONT size=2><SPAN class=docemphasis1><SPAN
style="COLOR: red; FONT-STYLE: normal; mso-ansi-language: DA; mso-bidi-font-style: italic">建议</SPAN></SPAN><SPAN
class=docemphasis1><SPAN
style="FONT-STYLE: normal; mso-ansi-language: DA; mso-bidi-font-style: italic">：即使你需要扩展一些规则，也不要去修改</SPAN></SPAN><SPAN
class=docemphasis1><SPAN lang=DA
style="mso-ansi-language: DA"><EM>validation-rules.xml</EM></SPAN></SPAN><SPAN
class=docemphasis1><SPAN
style="FONT-STYLE: normal; mso-ansi-language: DA; mso-bidi-font-style: italic">，而是通过新的配置文件去定义你所扩展的校验规则。</SPAN></SPAN><SPAN
lang=DA
style="mso-ansi-language: DA"><o:p></o:p></SPAN></FONT></FONT></P></TD></TR></TBODY></TABLE>
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