tomcat5文档(jasper 2 jsp engine)--ndog的blog.htm

这是最详细的对Tomcat4以上版本的解析。

      <P>&nbsp; &lt;target name="jspc"&gt; </P>
      <P>&nbsp;&nbsp;&nbsp; &lt;taskdef classname="org.apache.jasper.JspC" 
      name="jasper2" &gt; <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;classpath 
      id="jspc.classpath"&gt; <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;pathelement location="${java.home}/../lib/tools.jar"/&gt; 
      <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;fileset 
      dir="${tomcat.home}/bin"&gt; 
      <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;include 
      name="*.jar"/&gt; <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;/fileset&gt; <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;fileset dir="${tomcat.home}/server/lib"&gt; 
      <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;include 
      name="*.jar"/&gt; <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;/fileset&gt; <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;fileset dir="${tomcat.home}/common/lib"&gt; 
      <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;include 
      name="*.jar"/&gt; <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;/fileset&gt; <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;/classpath&gt; 
      <BR>&nbsp;&nbsp;&nbsp; &lt;/taskdef&gt; </P>
      <P>&nbsp;&nbsp;&nbsp; &lt;jasper2 
      <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      validateXml="false" 
      <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      uriroot="${webapp.path}" 
      <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      webXmlFragment="${webapp.path}/WEB-INF/generated_web.xml" 
      <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      outputDir="${webapp.path}/WEB-INF/src" /&gt; </P>
      <P>&nbsp; &lt;/target&gt; </P>
      <P>&nbsp; &lt;target name="compile"&gt;</P>
      <P>&nbsp;&nbsp;&nbsp; &lt;mkdir 
      dir="${webapp.path}/WEB-INF/classes"/&gt;<BR>&nbsp;&nbsp;&nbsp; &lt;mkdir 
      dir="${webapp.path}/WEB-INF/lib"/&gt;</P>
      <P>&nbsp;&nbsp;&nbsp; &lt;javac 
      destdir="${webapp.path}/WEB-INF/classes"<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      optimize="off"<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      debug="on" 
      failonerror="false"<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      srcdir="${webapp.path}/WEB-INF/src" <BR>&nbsp;&nbsp;&nbsp; 
      excludes="**/*.smap"&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;classpath&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;pathelement 
      location="${webapp.path}/WEB-INF/classes"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;fileset 
      dir="${webapp.path}/WEB-INF/lib"&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;include 
      name="*.jar"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;/fileset&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;pathelement 
      location="${tomcat.home}/common/classes"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;fileset 
      dir="${tomcat.home}/common/lib"&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;include 
      name="*.jar"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;/fileset&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;pathelement 
      location="${tomcat.home}/shared/classes"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;fileset 
      dir="${tomcat.home}/shared/lib"&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;include 
      name="*.jar"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;/fileset&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;fileset 
      dir="${tomcat.home}/bin"&gt; 
      <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;include 
      name="*.jar"/&gt; <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;/fileset&gt; <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      &lt;/classpath&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;include name="**" 
      /&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;exclude name="tags/**" 
      /&gt;<BR>&nbsp;&nbsp;&nbsp; &lt;/javac&gt;</P>
      <P>&nbsp; &lt;/target&gt;</P>
      <P>&nbsp; &lt;target name="all" depends="jspc,compile"&gt;<BR>&nbsp; 
      &lt;/target&gt;</P>
      <P>&lt;/project&gt;</P>&nbsp;</TD></TR></TBODY></TABLE>下面的命令行执行上面的脚本（替换<EM>$TOMCAT_HOME</EM>和<EM>$WEBAPP_PATH</EM>）： 

<P>
<TABLE border=1>
  <TBODY>
  <TR>
    <TD><STRONG>$ANT_HOME/ant -Dtomcat.home=&lt;$TOMCAT_HOME&gt; 
      -Dwebapp.path=&lt;$WEBAPP_PATH&gt;</STRONG></TD></TR></TBODY></TABLE></P>
<P>然后在预编译期间生成的servlets声明和映射加入到web应用的部署描述符中。将<EM>${webapp.path}/WEB-INF/generated_web.xml</EM>插入到<EM>${webapp.path}/WEB-INF/web.xml</EM>内适当的地方。重新启动web应用（使用管理器）并测试以检验预编译的servlets运行的很好。在web应用描述符中放入一个一个适当的记号也可以被用来自动插入Ant过滤功能生成的servlet声明和映射。这就是Tomcat发布的所有web应用怎样作为构造过程的一部分被自动编译的。</P>
<H5>5.使用Jikes</H5>
<P>如果使用Jikes编译JSP页面：</P>
<P>&nbsp;&nbsp;&nbsp; 
<EM>1.</EM>下载并安装jikes。jikes必须支持-<STRONG>encoding</STRONG>选项。执行jikes 
-help查阅编译时对-encoding的支持。<BR>&nbsp;&nbsp;&nbsp; 
<EM>2.</EM>设置初始化参数<STRONG>compiler</STRONG>为jikes。<BR>&nbsp;&nbsp;&nbsp; 
<EM>3.</EM>启动Tomcat时增加一条环境变量<STRONG>-Dbuild.compiler.emacs=true</STRONG>。这个改变jikes输出的错误信息格式使之和Jasper兼容。<BR>&nbsp;&nbsp;&nbsp; 
<EM>4.</EM>如果得到jikes不能使用UTF-8 
encoding的错误报告，试着将初始化参数<STRONG>javaEncoding</STRONG>设为<STRONG>ISO-8859-1</STRONG>。</P>
<P></P>
<P class=diaryFoot>- 作者： <A title=ndog 
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