JSP動態(tài)網頁開發(fā)技術概述

%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
html>
head>
meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
title>Insert title here/title>
/head>
body>
 This is my first JSP
 %
  out.print("你好啊C1");
  %>
/body>
/html>

/*
 * Generated by the Jasper component of Apache Tomcat
 * Version: Apache Tomcat/7.0.52
 * Generated at: 2018-10-05 08:32:50 UTC
 * Note: The last modified time of this file was set to
 *  the last modified time of the source file after
 *  generation to assist with modification tracking.
 */
package org.apache.jsp;

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

public final class C1_jsp extends org.apache.jasper.runtime.HttpJspBase
 implements org.apache.jasper.runtime.JspSourceDependent {

 private static final javax.servlet.jsp.JspFactory _jspxFactory =
   javax.servlet.jsp.JspFactory.getDefaultFactory();

 private static java.util.Mapjava.lang.String,java.lang.Long> _jspx_dependants;

 private javax.el.ExpressionFactory _el_expressionfactory;
 private org.apache.tomcat.InstanceManager _jsp_instancemanager;

 public java.util.Mapjava.lang.String,java.lang.Long> getDependants() {
 return _jspx_dependants;
 }

 public void _jspInit() {
 _el_expressionfactory = _jspxFactory.getJspApplicationContext(getServletConfig().getServletContext()).getExpressionFactory();
 _jsp_instancemanager = org.apache.jasper.runtime.InstanceManagerFactory.getInstanceManager(getServletConfig());
 }

 public void _jspDestroy() {
 }

 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=UTF-8");
  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\n");
  out.write("!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\r\n");
  out.write("html>\r\n");
  out.write("head>\r\n");
  out.write("meta http-equiv=\"Content-Type\" content=\"text/html; charset=ISO-8859-1\">\r\n");
  out.write("title>Insert title here/title>\r\n");
  out.write("/head>\r\n");
  out.write("body>\r\n");
  out.write("\tThis is my first JSP \r\n");
  out.write("\t");

  out.print("你好啊C1");

  out.write("\r\n");
  out.write("/body>\r\n");
  out.write("/html>");
 } catch (java.lang.Throwable t) {
  if (!(t instanceof javax.servlet.jsp.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);
  else throw new ServletException(t);
  }
 } finally {
  _jspxFactory.releasePageContext(_jspx_page_context);
 }
 }
}

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jasper.runtime;

import java.io.IOException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.HttpJspPage;

import org.apache.jasper.compiler.Localizer;

/**
 * This is the super class of all JSP-generated servlets.
 *
 * @author Anil K. Vijendran
 */
public abstract class HttpJspBase extends HttpServlet implements HttpJspPage {

 private static final long serialVersionUID = 1L;

 protected HttpJspBase() {
 }

 @Override
 public final void init(ServletConfig config)
  throws ServletException
 {
  super.init(config);
  jspInit();
  _jspInit();
 }

 @Override
 public String getServletInfo() {
  return Localizer.getMessage("jsp.engine.info");
 }

 @Override
 public final void destroy() {
  jspDestroy();
  _jspDestroy();
 }

 /**
  * Entry point into service.
  */
 @Override
 public final void service(HttpServletRequest request, HttpServletResponse response)
  throws ServletException, IOException
 {
  _jspService(request, response);
 }

 @Override
 public void jspInit() {
 }

 public void _jspInit() {
 }

 @Override
 public void jspDestroy() {
 }

 protected void _jspDestroy() {
 }

 @Override
 public abstract void _jspService(HttpServletRequest request,
          HttpServletResponse response)
  throws ServletException, IOException;
}

%
 java代碼（變量、方法、表達式等 ）
%>

%
 int sum=0;//聲明變量
 /*編寫語句*/
 for (int i=1;i=100;i++){
  sum+=i;
 }
 out.println("h1>Sum="+sum+"/h1>");
%>

%
 for (int i=1; i5; i++) 
 {
%>
 H1>http://localhost:8080/JavaWeb_Jsp_Study_20140603//H1>
%
 }
%>

%!
 java代碼：定義變量或者方法
%>

%!
static {
 System.out.println("loading Servlet!");
}

private int globalVar = 0;

public void jspInit(){
 System.out.println("initializing jsp!");
}
%>

%!
public void jspDestroy(){
 System.out.println("destroying jsp!");
}
%>

%=expression%>

%= new java.util.Date() %> 

!--這個注釋可以看見-->

%
 //JAVA中的單行注釋

 /*
  JAVA中的多行注釋
 */
%>

%
--JSP自己的注釋--%>