jsp源码实例3（获取jsp各种参数）

最新推荐文章于 2016-08-15 10:52:15 发布

转载最新推荐文章于 2016-08-15 10:52:15 发布 · 609 阅读

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#jsp #variables #import #cgi #servlets #server

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本文提供了一个Servlet示例，用于创建表格显示标准CGI变量的当前值。该Servlet继承自HttpServlet，并覆盖了doGet方法来处理HTTP GET请求。通过使用HttpServletRequest对象获取CGI变量，然后将这些信息发送到客户端。

package coreservlets;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;

/** Creates a table showing the current value of each
* of the standard CGI variables.
*

* Taken from Core Servlets and JavaServer Pages
* from Prentice Hall and Sun Microsystems Press,
* http://www.coreservlets.com/.
* © 2000 Marty Hall; may be freely used or adapted.
*/

public class ShowCGIVariables extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String[][] variables =
{ { "AUTH_TYPE", request.getAuthType() },
{ "CONTENT_LENGTH",
String.valueOf(request.getContentLength()) },
{ "CONTENT_TYPE", request.getContentType() },
{ "DOCUMENT_ROOT",
getServletContext().getRealPath("/") },
{ "PATH_INFO", request.getPathInfo() },
{ "PATH_TRANSLATED", request.getPathTranslated() },
{ "QUERY_STRING", request.getQueryString() },
{ "REMOTE_ADDR", request.getRemoteAddr() },
{ "REMOTE_HOST", request.getRemoteHost() },
{ "REMOTE_USER", request.getRemoteUser() },
{ "REQUEST_METHOD", request.getMethod() },
{ "SCRIPT_NAME", request.getServletPath() },
{ "SERVER_NAME", request.getServerName() },
{ "SERVER_PORT",
String.valueOf(request.getServerPort()) },
{ "SERVER_PROTOCOL", request.getProtocol() },
{ "SERVER_SOFTWARE",
getServletContext().getServerInfo() }
};
String title = "Servlet Example: Showing CGI Variables";
out.println(ServletUtilities.headWithTitle(title) +
" " +
"

" + title + "

" +
"

JAVA天堂

" +

" +"

CGI Variable Name	Value"); for(int i=0; i
" + varName + "	" + varValue); } out.println("

");
}

/** POST and GET requests handled identically. */

public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

来自:http://www.javah.net/JSP_JSF/20070516/1403.html