JSP程序运行原理、文档结构及简单输入输出 JSP程序运行原理、文档结构及简单输入输出实例分析

package org.apache.jsp;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
public final class ch2_jsp extends org.apache.jasper.runtime.HttpJspBase
  implements org.apache.jasper.runtime.JspSourceDependent {
 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 = JspFactory.getDefaultFactory().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 {
  JspFactory _jspxFactory = null;
  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 {
   _jspxFactory = JspFactory.getDefaultFactory();
   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("DDDDDDDDDDDDDDDDDDDDDDDD/r/n");
   out.print("FFFFFFFFFFFFFFFF");
  } 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 {
   if (_jspxFactory != null) _jspxFactory.releasePageContext(_jspx_page_context);
  }
 }
}

<%@ page contentType="text/html;charset=gb2312"%>
请注册<br>
<form method="post" name="fi1" action="process.jsp">
  用户ID：<input type="text" name="userid"><br>
  口令：<input type="password" name="userpass"><br>
  确认口令：<input type="password" name="userpass1"><br>
  性别：<input type="radio" name="sex" value="男" checked>男
     <input type="radio" name="sex" value="女">女<br>
  爱好：<input type="checkbox" name="fav" value="运动">运动
     <input type="checkbox" name="fav" value="音乐">音乐
     <input type="checkbox" name="fav" value="编程">编程<br>
  学历：
    <select name="degree">
      <option value="本科">本科</option>
      <option value="硕士">硕士</option>
      <option value="专科">专科</option>
      <option value="博士">博士</option>
    </select><br>
  备注：
    <textarea name="comment"></textarea><br>
    <input type="submit" value="提交"><input type="reset" value="重置">
</form>

<%@ page contentType="text/html;charset=gb2312"%>
注册信息如下：
<%
  String userid = request.getParameter("userid");
  String userpass = request.getParameter("userpass");
  String userpass1 = request.getParameter("userpass1");
  String sex = request.getParameter("sex");
  // 对性别进行编码转换
  sex = new String(sex.getBytes("8859_1"));
  String[] fav = request.getParameterValues("fav");
  // 该方法用于获取多值元素的值
  String degree = request.getParameter("degree");
  String comment = request.getParameter("comment");
  out.println("用户ID："+userid);
%>
<br>口令：<%=userpass%>
<br>确认口令：<%=userpass1%>
<br>性别：<%=sex%>
<br>爱好：
<%
  if(fav!=null)
  for(String s:fav)
  {
   s=new String(s.getBytes("8859_1"));
   out.print(s);
  }
%>
<br>学历：<%=degree%>
<br>备注：<%=comment%>