JSP and JSTL Tutorials - Tutorial Addendum - JSP Elements

31 December 18:00

(Continued from antecedent part...)

It s actual absorbing to see the Servlet chic translated from CurrentTime.jsp:

 

    package org.apache.jsp;

    
import javax.servlet.*;

    
import javax.servlet.http.*;

    
import javax.servlet.jsp.*;

    
import org.apache.jasper.runtime.*;

    
import java.util.*;

    
import java.text.*;

    
public chic CurrentTime_jsp extends HttpJspBase {

    
   clandestine   Date   now;

    
   clandestine JspWriter out;

    
   clandestine abandoned printTime(String tz) throws Throwable {

    
      DateFormat df = DateFormat.getInstance();

    
      df.setTimeZone(TimeZone.getTimeZone(tz));

    
      out.println(tz+": "+df.format(now)+"<br/>"); 

    
   }

    
  clandestine changeless java.util.Vector _jspx_includes;

    
  changeless {

    
    _jspx_includes = new java.util.Vector(1);

    
    _jspx_includes.add("/jsp/JvmStamp.jsp");

    
  }

    
  accessible java.util.List getIncludes() {

    
    acknowledgment _jspx_includes;

    
  }

    
  accessible abandoned _jspService(Http Servlet Request request, 

    
        Http Servlet Response response)

    
        throws java.io.IOException,  Servlet Exception {

    
    JspFactory _jspxFactory = null;

    
    javax.servlet.jsp.PageContext pageContext = null;

    
    HttpSession affair = null;

    
     Servlet Context appliance = null;

    
     Servlet Config config = null;

    
    JspWriter out = null;

    
    Item page = this;

    
    JspWriter _jspx_out = null;

    
    try {

    
      _jspxFactory = JspFactory.getDefaultFactory();

    
      response.setContentType("text/html;charset=UTF-8");

    
      pageContext = _jspxFactory.getPageContext(this, request, response,

    
      			null, true, 8192, true);

    
      appliance = pageContext.get Servlet Context();

    
      config = pageContext.get Servlet Config();

    
      affair = pageContext.getSession();

    
      out = pageContext.getOut();

    
      _jspx_out = out;

    
      out.write("<html>");

    
      out.write("<body>");

    
      out.write("<p>");

    
      out.write("<b>");

    
      out.write("Current time in altered time zones:");

    
      out.write("</b>");

    
      out.write("<br/>");

    
   this.out = out;

    
   now = new Date();

    
   printTime("America/New_York");

    
   printTime("America/Los_Angeles");

    
   printTime("Asia/Shanghai");

    
   printTime("Europe/Paris");

    
   printTime("Europe/Moscow");

    
      out.write("</p>");

    
      out.write("<p>");

    
      out.write("<b>");

    
      out.write("Current JVM:");

    
      out.write("</b>");

    
      out.write("<br/>");

    
   Cord s;

    
   s = "java.vm.name";

    
   out.println(s+": "+System.getProperty(s)+"<br/>");

    
   s = "java.vm.version";

    
   out.println(s+": "+System.getProperty(s)+"<br/>");

    
   s = "os.name";

    
   out.println(s+": "+System.getProperty(s)+"<br/>");

    
   s = "os.version";

    
   out.println(s+": "+System.getProperty(s)+"<br/>");

    
      out.write("</p>");

    
      out.write("<p>");

    
      JspRuntimeLibrary.include(request, response, "TimeStamp.jsp", out,

    
         false);

    
      out.write("</p>");

    
      out.write("</body>");

    
      out.write("</html>");

    
    } bolt (Throwable t) {

    
      out = _jspx_out;

    
      if (out != absent && out.getBufferSize() != 0)

    
        out.clearBuffer();

    
      if (pageContext != null) pageContext.handlePageException(t);

    
    } assuredly {

    
      if (_jspxFactory != null) 

    
         _jspxFactory.releasePageContext(pageContext);

    
    }

    
  }

    
}

Couple of absorbing things to understand in this example:

The pre-defined altar like "out" is not accessible in the charge elements.


So I acclimated an instance capricious "out" to canyon the pre-defined "out" to my "printTime()"


method in the acknowledgment element.

Since I am using XML format, "<" needs to be replaced by the article name "<"


in any Java statements. During the adaptation process, the article names will be


replaced aback to "<".

No Servlet chic was created for JvmStamp.jsp, because its agreeable was included

into CurrentTime.jsp during the adaptation process.

"TimeStamp.jsp" was advised abnormally than "JvmStamp.jsp". "TimeStamp.jsp"


was translated apart into a Servlet class. Its account adjustment was alleged


by CurrentTime_jsp.java during execution.