title: where is jsp's java file
body: <p>In tomcat6, where does tomcat put the generated java file for a JSP file?</p>
  
  <p>exception:</p>
  
  <pre><code>java.lang.NullPointerException
      at org.apache.jsp.xxx.yyy.view_jsp._jspService(view_jsp.java:164)
  </code></pre>