JSP的注释及生成的Servlet

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Servlet JSP Java Apache HTML

JSP代码注释

        使用//对单行代码进行注释（Java单行注释）
        使用/* */方式对多行代码进行注释（Java多行注释）
        使用/** */方式对多行代码进行注释（Java文本注释）
        使用<%-- --%>对多行代码进行注释（JSP注释，不会复制到Servlet）
        使用对多行HTML代码进行注释（HTML注释，不会复制到Servlet）

<!-- Here is an HTML comment - copied to the output -->

<%! // Single-line Java comments are copied to the generated servlet.

  /** This is a Javadoc comment, used to document Java functions */
  public void someMethod() {
    /* Multi-line Java comment, useful to comment out
       blocks of code during the development cycle.
       This sort of comment is copied to the generated servlet.
    */
  }
%>

<HTML>
  <HEAD>
    <TITLE>Comments in a JSP</TITLE>
  </HEAD>
  <BODY>
    <% // A Java comment inside a scriptlet - copied into the generated servlet %>
    Java and JSP comments.
    <%-- A JSP comment - not copied to the servlet, or the output --%>
    HTML comments.
    <!-- A HTML comment - not copied to the servlet, or the output -->
  </BODY>
</HTML>

package org.apache.jsp;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;

public final class index_jsp extends org.apache.jasper.runtime.HttpJspBase
    implements org.apache.jasper.runtime.JspSourceDependent {

 // Single-line Java comments are copied to the generated servlet.

  /** This is a Javadoc comment, used to document Java functions */
  public void someMethod() {
    /* Multi-line Java comment, useful to comment out
       blocks of code during the development cycle.
       This sort of comment is copied to the generated servlet.
    */
  }

  private static final JspFactory _jspxFactory = JspFactory.getDefaultFactory();

  private static java.util.List _jspx_dependants;

  private javax.el.ExpressionFactory _el_expressionfactory;
  private org.apache.AnnotationProcessor _jsp_annotationprocessor;

  public Object getDependants() {
    return _jspx_dependants;
  }

  public void _jspInit() {
    _el_expressionfactory = _jspxFactory.getJspApplicationContext(getServletConfig().getServletContext()).getExpressionFactory();
    _jsp_annotationprocessor = (org.apache.AnnotationProcessor) getServletConfig().getServletContext().getAttribute(org.apache.AnnotationProcessor.class.getName());
  }

  public void _jspDestroy() {
  }

  public void _jspService(HttpServletRequest request, HttpServletResponse response)
        throws java.io.IOException, ServletException {

    PageContext pageContext = null;
    HttpSession session = null;
    ServletContext application = null;
    ServletConfig config = null;
    JspWriter out = null;
    Object page = this;
    JspWriter _jspx_out = null;
    PageContext _jspx_page_context = null;


    try {
      response.setContentType("text/html");
      pageContext = _jspxFactory.getPageContext(this, request, response,
      			null, true, 8192, true);
      _jspx_page_context = pageContext;
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      session = pageContext.getSession();
      out = pageContext.getOut();
      _jspx_out = out;

      out.write("<!-- Here is an HTML comment - copied to the output -->\n");
      out.write("\n");
      out.write("\n");
      out.write("\n");
      out.write("<HTML>\n");
      out.write("  <HEAD>\n");
      out.write("    <TITLE>Comments in a JSP</TITLE>\n");
      out.write("  </HEAD>\n");
      out.write("  <BODY>\n");
      out.write("    ");
 // A Java comment inside a scriptlet - copied into the generated servlet 
      out.write("\n");
      out.write("    Java and JSP comments.\n");
      out.write("    ");
      out.write("\n");
      out.write("    HTML comments.\n");
      out.write("    <!-- A HTML comment -->\n");
      out.write("  </BODY>\n");
      out.write("</HTML>");
    } catch (Throwable t) {
      if (!(t instanceof SkipPageException)){
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0)
          try { out.clearBuffer(); } catch (java.io.IOException e) {}
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
      }
    } finally {
      _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }
}

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2010-11-25 11:54
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