虽然很简单，但是很全，有时候很久没用好了还真是记不住，所以转载过来了。
http:/localhost/123/jsp/test.jsp:
1: <%@ page language="java" pageEncoding="UTF-8"%>
2:
3: <%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
4: <%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
5: <%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
6: <%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>
7:
8:
9: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
10: <html:html lang="true">
11: <head>
12: <html:base />
13:
14: <title>test.jsp</title>
15:
16: <meta http-equiv="pragma" content="no-cache">
17: <meta http-equiv="cache-control" content="no-cache">
18: <meta http-equiv="expires" content="0">
19: <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
20: <meta http-equiv="description" content="This is my page">
21: <!--
22: <link rel="stylesheet" type="text/css" href="styles.css">
23: -->
24:
25: </head>
26:
27: <body>
28: <p>
29: <h2>application - javax.servlet.ServletContext</h2>
30: application.getRealPath("/")<%=application.getRealPath("/") %><br>
31: application.getMajorVersion() - <%=application.getMajorVersion() %><br>
32: application.getMimeType("txt") - <%=application.getMimeType("txt") %><br>
33: application.getServerInfo() - <%=application.getServerInfo() %><br>
34: application.getServletContextName() - <%=application.getServletContextName() %><br>
35: application.getContext()
36: </p>
37:
38: <p>
39: <h2>config - javax.servlet.ServletConfig</h2>
40: config.getServletName() - <%=config.getServletName() %><br>
41: config.getServletContext()<br>
42: </p>
43:
44: <p>
45: <h2>pageContext - javax.servlet.jsp.PageContext</h2>
46: pageContext.getRequest()（JSP中的requset隐式对象）<br>
47: pageContext.getResponse()（JSP中的response隐式对象）<br>
48: pageContext.getServletConfig()（JSP中的config隐式对象）<br>
49: pageContext.getServletContext()（JSP中的application隐式对象）<br>
50: pageContext.getException()（JSP中的exception隐式对象）<br>
51: pageContext.getSession()（JSP中的session隐式对象）<br>
52: pageContext.getOut()（JSP中的out隐式对象）
53: </p>
54:
55: <p>
56: <h2>request - javax.servlet.http.HttpServletRequest</h2>
57: request.getLocalAddr() - <%=request.getLocalAddr() %><br>
58: request.getServletPath() - <%=request.getServletPath() %><br>
59: request.getContextPath() - <%=request.getContextPath() %><br>
60: request.getLocalName() - <%=request.getLocalName() %><br>
61: request.getLocalPort() - <%=request.getLocalPort() %><br>
62: request.getPathInfo() - <%=request.getPathInfo() %><br>
63: request.getProtocol() - <%=request.getProtocol() %><br>
64: request.getQueryString() - <%=request.getQueryString() %><br>
65: request.getRemoteAddr() - <%=request.getRemoteAddr() %><br>
66: request.getRemoteHost() - <%=request.getRemoteHost() %><br>
67: request.getRemotePort() - <%=request.getRemotePort() %><br>
68: request.getRemoteUser() - <%=request.getRemoteUser() %><br>
69: request.getRequestedSessionId():<%=request.getRequestedSessionId() %><br>
70: request.getRequestURI() - <%=request.getRequestURI() %><br>
71: request.getRequestURL() - <%=request.getRequestURL() %>
72: </p>
73:
74: <p>
75: <h2>session - javax.servlet.http.HttpSession</h2>
76: session.getServletContext()
77: </p>
78:
79: </body>
80: </html:html>
客户端显示如下：
application - javax.servlet.ServletContext
application.getRealPath("/")F:\workspace\tomcat\123\
application.getMajorVersion() - 2
application.getMimeType("txt") - null
application.getServerInfo() - Apache Tomcat/5.0.30
application.getServletContextName() - null
application.getContext()
config - javax.servlet.ServletConfig
config.getServletName() - jsp
config.getServletContext()
pageContext - javax.servlet.jsp.PageContext
pageContext.getRequest()
pageContext.getResponse()
pageContext.getServletConfig()
pageContext.getServletContext()
pageContext.getException()
pageContext.getSession()
pageContext.getOut()
request - javax.servlet.http.HttpServletRequest
request.getLocalAddr() - 127.0.0.1
request.getServletPath() - /jsp/test.jsp
request.getContextPath() - /123
request.getLocalName() - 127.0.0.1
request.getLocalPort() - 80
request.getPathInfo() - null
request.getProtocol() - HTTP/1.1
request.getQueryString() - null
request.getRemoteAddr() - 127.0.0.1
request.getRemoteHost() - 127.0.0.1
request.getRemotePort() - 1211
request.getRemoteUser() - null
request.getRequestedSessionId():5AFAE9C0A164621D4F8E0DAF2F253C92
request.getRequestURI() - /123/jsp/test.jsp
request.getRequestURL() - http://localhost/123/jsp/test.jsp
session - javax.servlet.http.HttpSession
session.getServletContext()
注：
http://localhost/123/taglib/html/result.jsp中使用以下方法
request.getServletPath() :返回request的请求路径的相对于应用程序的相对路径
request.getContextPath()返回应用程序上下文相对路径
this.getRealPath(String str)返回UIL中str对应于本地磁盘的绝对路径
request.getLocalAddr() 返回服务器IP地址
