詳細
1.JSP定義:javaサーバページ、本質はサーブレット(JSPエンジン翻訳により生成)である.
 
2.JSP九大内蔵オブジェクト(JSPページが直接使えるオブジェクト)

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

    final javax.servlet.jsp.PageContext pageContext;
    javax.servlet.http.HttpSession session = null;
    final javax.servlet.ServletContext application;
    final javax.servlet.ServletConfig config;
    javax.servlet.jsp.JspWriter out = null;
    final java.lang.Object page = this;
    javax.servlet.jsp.JspWriter _jspx_out = null;
    javax.servlet.jsp.PageContext _jspx_page_context = null;


    try {
      response.setContentType("text/html; charset=ISO-8859-1");
      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("\r
");
      out.write(""-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\r
");
      out.write("\r
");
      out.write("\r
");
      out.write("\r
");
      out.write("\r
");
      out.write("\r
");
      out.write("\r
");
      out.write("\t
Hello World!
\r
");
      out.write("\r
");
      out.write("");
    } catch (java.lang.Throwable t) {
      if (!(t instanceof javax.servlet.jsp.SkipPageException)){
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0)
          try {
            if (response.isCommitted()) {
              out.flush();
            } else {
              out.clearBuffer();
            }
          } catch (java.io.IOException e) {}
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
        else throw new ServletException(t);
      }
    } finally {
      _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }

request:HttpServertRequestオブジェクト
response:HttpServeretResponseオブジェクト
PageContext:JSPコンテキストオブジェクト
session:HttpSessionオブジェクト
アプリケーション:WEBアプリケーションコンテキストオブジェクト
config:サーブレットコンフィグオブジェクト
    out: JspWriter
Page:現在のページの参照、タイプはObeject.
    exception: