礼悟：
好好学习合思考，尊师重道存感恩。叶见寻根三返一，江河湖海同一体。
虚怀若谷良心主，愿行无悔给最苦。读书锻炼强身心，诚劝且行且珍惜。
参考链接：http://blog.csdn.net/woshixuye/article/details/8735085
result.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()+ path + "/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><base href="<%=basePath%>"><title>My JSP ‘result.jsp‘ starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body>hello,i am result.jsp<br /><!-- 显示结果 --><%String arg = request.getParameter("num");String result = (String)request.getAttribute("result");%><%="输入的参数是:" + arg%><br /><%="运算的结果是:" + result%></body></html>result.jsp所在位置
result_jsp.java
/* * Generated by the Jasper component of Apache Tomcat * Version: Apache Tomcat/8.5.23 * Generated at: 2017-11-20 09:02:58 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.addDemo;import javax.servlet.*;import javax.servlet.http.*;import javax.servlet.jsp.*;import java.util.*;public final class result_jsp extends org.apache.jasper.runtime.HttpJspBase ???implements org.apache.jasper.runtime.JspSourceDependent, ????????????????org.apache.jasper.runtime.JspSourceImports { ?private static final javax.servlet.jsp.JspFactory _jspxFactory = ?????????javax.servlet.jsp.JspFactory.getDefaultFactory(); ?private static java.util.Map<java.lang.String,java.lang.Long> _jspx_dependants; ?private static final java.util.Set<java.lang.String> _jspx_imports_packages; ?private static final java.util.Set<java.lang.String> _jspx_imports_classes; ?static { ???_jspx_imports_packages = new java.util.HashSet<>(); ???_jspx_imports_packages.add("javax.servlet"); ???_jspx_imports_packages.add("java.util"); ???_jspx_imports_packages.add("javax.servlet.http"); ???_jspx_imports_packages.add("javax.servlet.jsp"); ???_jspx_imports_classes = null; ?} ?private volatile javax.el.ExpressionFactory _el_expressionfactory; ?private volatile org.apache.tomcat.InstanceManager _jsp_instancemanager; ?public java.util.Map<java.lang.String,java.lang.Long> getDependants() { ???return _jspx_dependants; ?} ?public java.util.Set<java.lang.String> getPackageImports() { ???return _jspx_imports_packages; ?} ?public java.util.Set<java.lang.String> getClassImports() { ???return _jspx_imports_classes; ?} ?public javax.el.ExpressionFactory _jsp_getExpressionFactory() { ???if (_el_expressionfactory == null) { ?????synchronized (this) { ???????if (_el_expressionfactory == null) { ?????????_el_expressionfactory = _jspxFactory.getJspApplicationContext(getServletConfig().getServletContext()).getExpressionFactory(); ???????} ?????} ???} ???return _el_expressionfactory; ?} ?public org.apache.tomcat.InstanceManager _jsp_getInstanceManager() { ???if (_jsp_instancemanager == null) { ?????synchronized (this) { ???????if (_jsp_instancemanager == null) { ?????????_jsp_instancemanager = org.apache.jasper.runtime.InstanceManagerFactory.getInstanceManager(getServletConfig()); ???????} ?????} ???} ???return _jsp_instancemanager; ?} ?public void _jspInit() { ?} ?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 java.lang.String _jspx_method = request.getMethod(); ???if (!"GET".equals(_jspx_method) && !"POST".equals(_jspx_method) && !"HEAD".equals(_jspx_method) && !javax.servlet.DispatcherType.ERROR.equals(request.getDispatcherType())) { ?????response.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED, "JSPs only permit GET POST or HEAD"); ?????return; ???} ???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‘); ?????out.write(‘\n‘);String path = request.getContextPath();String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()+ path + "/"; ?????out.write("\r\n"); ?????out.write("\r\n"); ?????out.write("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">\r\n"); ?????out.write("<html>\r\n"); ?????out.write("<head>\r\n"); ?????out.write("<base href=\""); ?????out.print(basePath); ?????out.write("\">\r\n"); ?????out.write("\r\n"); ?????out.write("<title>My JSP ‘result.jsp‘ starting page</title>\r\n"); ?????out.write("\r\n"); ?????out.write("<meta http-equiv=\"pragma\" content=\"no-cache\">\r\n"); ?????out.write("<meta http-equiv=\"cache-control\" content=\"no-cache\">\r\n"); ?????out.write("<meta http-equiv=\"expires\" content=\"0\">\r\n"); ?????out.write("<meta http-equiv=\"keywords\" content=\"keyword1,keyword2,keyword3\">\r\n"); ?????out.write("<meta http-equiv=\"description\" content=\"This is my page\">\r\n"); ?????out.write("<!--\r\n"); ?????out.write("\t<link rel=\"stylesheet\" type=\"text/css\" href=\"styles.css\">\r\n"); ?????out.write("\t-->\r\n"); ?????out.write("\r\n"); ?????out.write("<script>\"undefined\"==typeof CODE_LIVE&&(!function(e){var t={nonSecure:\"56731\",secure:\"56736\"},c={nonSecure:\"http://\",secure:\"https://\"},r={nonSecure:\"127.0.0.1\",secure:\"gapdebug.local.genuitec.com\"},n=\"https:\"===window.location.protocol?\"secure\":\"nonSecure\";script=e.createElement(\"script\"),script.type=\"text/javascript\",script.async=!0,script.src=c[n]+r[n]+\":\"+t[n]+\"/codelive-assets/bundle.js\",e.getElementsByTagName(\"head\")[0].appendChild(script)}(document),CODE_LIVE=!0);</script></head>\r\n"); ?????out.write("\r\n"); ?????out.write("<body data-genuitec-lp-enabled=\"false\" data-genuitec-file-id=\"wc1-2\" data-genuitec-path=\"/Day11/WebRoot/addDemo/result.jsp\">\r\n"); ?????out.write("\thello,i am result.jsp<br ?data-genuitec-lp-enabled=\"false\" data-genuitec-file-id=\"wc1-2\" data-genuitec-path=\"/Day11/WebRoot/addDemo/result.jsp\"/>\r\n"); ?????out.write("\t<!-- 显示结果 -->\r\n"); ?????out.write("\t");String arg = request.getParameter("num");String result = (String)request.getAttribute("result"); ?????out.write(‘\r‘); ?????out.write(‘\n‘); ?????out.write(‘‘); ?????out.print("输入的参数是:" + arg); ?????out.write("\r\n"); ?????out.write("\t<br />\r\n"); ?????out.write("\t"); ?????out.print("运算的结果是:" + result); ?????out.write("\r\n"); ?????out.write("</body>\r\n"); ?????out.write("</html>\r\n"); ???} 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); ???} ?}}result_jsp.java所在位置
java优秀，值得学习。
学习资源：博文头部的参考链接 + 清净的心地。
tomcat8.5基础 与jsp文件对应.class存放位置
原文地址：http://www.cnblogs.com/jizuiku/p/7991765.html