为什么我的jsp跳转不正确？我已经设置好了web.xml

2013-05-17 07:12:00 387 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

JSP实现简单登录跳转 1.JSP介绍 JSP即JavaServerPages，JSP技术使用Java编程语言编写类XML的tags和scriptlets，来封装产生动态网页的处理逻辑。网页还能通过tags和scriptlets访问存在于服务端的资源的应用逻辑。JSP将网页逻辑与网页设计的显示分离，支持可重用的基于组件的设计，使基于Web的应用程序的开发变得迅速和容易。它是一种动态页面技术，它的主要目的是将表示逻... 阅读详情

wel.xml里面有两段关于AdminServlet的：
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>AdminServlet</servlet-name>
<servlet-class>com.action.AdminServlet</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>AdminServlet</servlet-name>
<url-pattern>/Admin.shtml</url-pattern>
</servlet-mapping>

AdminServlet是这么写的：



package com.action;

/**

 * 管理员登陆 增加 修改 删除 删除登陆日志

 */

import java.io.IOException;

import java.util.List;

import java.util.StringTokenizer;



import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;



import com.bean.AdminBean;

import com.bean.SystemBean;

import com.util.Constant;

import com.util.MD5;



public class AdminServlet extends HttpServlet {



	/**

	 * Constructor of the object.

	 */

	public AdminServlet() {

		super();

	}



	/**

	 * Destruction of the servlet. <br>

	 */

	public void destroy() {

		super.destroy(); // Just puts "destroy" string in log

		// Put your code here

	}



	/**

	 * The doGet method of the servlet. <br>

	 *

	 * This method is called when a form has its tag value method equals to get.

	 * 

	 * @param request the request send by the client to the server

	 * @param response the response send by the server to the client

	 * @throws ServletException if an error occurred

	 * @throws IOException if an error occurred

	 */

	public void doGet(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {



		doPost(request,response);

	}



	/**

	 * The doPost method of the servlet. <br>

	 *

	 * This method is called when a form has its tag value method equals to post.

	 * 

	 * @param request the request send by the client to the server

	 * @param response the response send by the server to the client

	 * @throws ServletException if an error occurred

	 * @throws IOException if an error occurred

	 */

	public void doPost(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {



		response.setContentType(Constant.CONTENTTYPE);

		request.setCharacterEncoding(Constant.CHARACTERENCODING);

		try{

			String method=request.getParameter("method").trim();

			AdminBean loginbean = new AdminBean();

			HttpSession session = request.getSession();

			session.setMaxInactiveInterval(1200);

			SystemBean systembean = new SystemBean();

			String sysdir = systembean.getDir();

			if(method.equals("one")){//admin登录

				String username = request.getParameter("username");

				String password = request.getParameter("password");

				if(username == null||username.trim().equals("")){

					request.setAttribute("message", "请正确输入用户名！");

					request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);

				}

				else if(password == null||password.trim().equals("")){

					request.setAttribute("message", "请输入密码！");

					request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);

				}

				else{

					String md5password = MD5.MD5(password);

					String agent = request.getHeader("user-agent"); 

					StringTokenizer st = new StringTokenizer(agent,";"); 

					String useros=st.nextToken();

					String loginip = request.getRemoteAddr();			

					int flag = loginbean.adminLogin(username,md5password, password,useros,loginip);

					switch (flag){

						case Constant.NAME_ERROR:

							request.setAttribute("message", "用户名错误！请确认管理权限！");

							request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);

							break;

						case Constant.PASSWORD_ERROR:

							request.setAttribute("message", "密码错误，请确认管理权限！");

							request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);

							break;

					}

				}

			}

			else if(method.equals("editpwd")){//admin edit password

				String username2 = (String)session.getAttribute("user");

				if(username2 == null){

					request.getRequestDispatcher("error.jsp").forward(request, response);

				}

				else{

					String oldpwd = MD5.MD5(request.getParameter("oldpwd").trim());

					String newpwd = MD5.MD5(request.getParameter("newpwd").trim());

					String username = (String)session.getAttribute("user");

					int flag = loginbean.editPassword(username, oldpwd, newpwd);

					switch (flag){

						case Constant.SUCCESS:

							request.setAttribute("message", "密码修改成功！");

							request.getRequestDispatcher(sysdir+"/system/editpwd.jsp").forward(request, response);

							break;

						case Constant.PASSWORD_ERROR:

							request.setAttribute("message", "原始密码错误，请确认权限！");

							request.getRequestDispatcher(sysdir+"/system/editpwd.jsp").forward(request, response);

							break;

						case Constant.SYSTEM_ERROR:

							request.setAttribute("message", "系统维护中，请稍后再试！");

							request.getRequestDispatcher(sysdir+"/system/editpwd.jsp").forward(request, response);

							break;

					}

				}		

			}

			else if(method.equals("exit")){//admin exit

				String username2 = (String)session.getAttribute("user");

				if(username2 == null){

					request.getRequestDispatcher("error.jsp").forward(request, response);

				}

				else{

					session.removeAttribute("user");

					session.removeAttribute("list");

					System.gc();

					request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);

				}			

			}

			else if(method.equals("manager")){//add,update manager

				String username2 = (String)session.getAttribute("user");

				if(username2 == null){

					request.getRequestDispatcher("error.jsp").forward(request, response);

				}

				else{

					String ra = request.getParameter("ra").trim();

					if(ra.equals("add")){

						String username = request.getParameter("username").trim();

						String password = MD5.MD5(request.getParameter("password").trim());

						String isuse = request.getParameter("isuse").trim();

						if(isuse.equals("在用"))

							isuse = "1";

						else

							isuse = "2";

						int flag = loginbean.addManager(username, password, "2", isuse);

						if(flag == Constant.SUCCESS){

							request.setAttribute("message", "增加管理员成功！");

							request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);

						}

						else if(flag == Constant.SAME_NAME){

							request.setAttribute("username", username);

							request.setAttribute("message", "该用户名已经存在！");

							request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);

						}

						else{

							request.setAttribute("message", "系统维护中，请稍后再试！");

							request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);

						}		

					}

					else if(ra.equals("update")){

						String username = request.getParameter("username").trim();

						String password = request.getParameter("password").trim();

						String isuse = request.getParameter("isuse").trim();

						if(!password.equals("")){

							password = MD5.MD5(password);

						}

						if(isuse.equals("在用"))

							isuse = "1";

						else

							isuse = "2";

						int flag = loginbean.updateManager(username, password, "2", isuse);

						if(flag == Constant.SUCCESS){

							request.setAttribute("message", "修改管理员信息成功！");

							request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);

						}	

						else{

							request.setAttribute("message", "系统维护中，请稍后再试！");

							request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);

						}		

					}

				}

			}

			else if(method.equals("delm")){//delete manager

				String username2 = (String)session.getAttribute("user");

				if(username2 == null){

					request.getRequestDispatcher("error.jsp").forward(request, response);

				}

				else{

					int id = Integer.parseInt(request.getParameter("id").trim());

					if(id == 1){

						request.setAttribute("message", "不能删除原始帐号！");

						request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);

					}

					else{

						int flag = loginbean.delManager(id);

						if(flag == Constant.SUCCESS){

							request.setAttribute("message", "删除成功！");

							request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);

						}	

						else{

							request.setAttribute("message", "系统维护中，请稍后再试！");

							request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);

						}	

					}

				}			

			}

			else if(method.equals("dellog")){//delete login note

				String username2 = (String)session.getAttribute("user");

				if(username2 == null){

					request.getRequestDispatcher("error.jsp").forward(request, response);

				}

				else{

					String check[] = request.getParameterValues("checkit");

					if(check == null){

						request.setAttribute("message", "请选择要删除的记录！");

						request.getRequestDispatcher(sysdir+"/system/log.jsp").forward(request, response);

					}

					else{

						int id[]= new int[check.length];

						for(int i = 0;i<check.length;i++){

							int s = Integer.parseInt(check[i]);				

							id[i] = s;

						}

						int flag = loginbean.delLog(id);

						if(flag == Constant.SUCCESS){

							request.setAttribute("message", "删除记录成功！");

							request.getRequestDispatcher(sysdir+"/system/log.jsp").forward(request, response);

						}

						else{

							request.setAttribute("message", "系统维护中，请稍后再试！");

							request.getRequestDispatcher(sysdir+"/system/log.jsp").forward(request, response);

						}

					}

				}			

			}

			else{//无参数传入转到错误页面

				request.getRequestDispatcher("error.jsp").forward(request, response);

			}

		}catch(Exception e){

			e.printStackTrace();

			request.getRequestDispatcher("error.jsp").forward(request, response);

		}

	}



	/**

	 * Initialization of the servlet. <br>

	 *

	 * @throws ServletException if an error occure

	 */

	public void init() throws ServletException {

		// Put your code here

	}



}

我的问题是，为什么会停在了/Admin.shtml上面？这是为什么？

...全文

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u010627130

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u010627130 2013-05-17

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引用 12 楼 splendid_java 的回复:

[quote=引用 11 楼 u010627130 的回复:] [quote=引用 9 楼 splendid_java 的回复:] tomcat默认不会操作shtml的，建议取消server.xml配置文件的注释

啥意思？server.xml？[/quote]记错了，是tomcat/conf/web.xml里面，把shtml相关的注释取消了。看看这篇文章你会明白的：http://blog.tianya.cn/blogger/post_read.asp?BlogID=666817&PostID=8788268 [/quote] 我必须是要用shtml的，但是我设置了tomcat 还是不行啥情况。。

一叶飞舟 2013-05-17

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引用 11 楼 u010627130 的回复:

[quote=引用 9 楼 splendid_java 的回复:] tomcat默认不会操作shtml的，建议取消server.xml配置文件的注释

啥意思？server.xml？[/quote]记错了，是tomcat/conf/web.xml里面，把shtml相关的注释取消了。看看这篇文章你会明白的：http://blog.tianya.cn/blogger/post_read.asp?BlogID=666817&PostID=8788268

u010627130 2013-05-17

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引用 9 楼 splendid_java 的回复:

tomcat默认不会操作shtml的，建议取消server.xml配置文件的注释

啥意思？server.xml？

u010627130 2013-05-17

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引用 8 楼 YaphetS880621 的回复:

可以试试5楼上说的，，，

我实在没看明白5楼的建议是啥

一叶飞舟 2013-05-17

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tomcat默认不会操作shtml的，建议取消server.xml配置文件的注释

限量版男人__ 2013-05-17

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可以试试5楼上说的，，，

u010627130 2013-05-17

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引用 5 楼 fangmingshijie 的回复:

好好看看url-pattern匹配规则。有扩展名的，直接去掉.扩展名映射

我不是太懂啊，去掉扩展名之后是不是应该是这样：


<servlet-mapping>
    <servlet-name>AdminServlet</servlet-name>
    <url-pattern>/Admin</url-pattern>
  </servlet-mapping>

虎子kaka 2013-05-17

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10-25万，急招赴日java工程师和项目经理，日语一级，去东京或大阪。详情QQ：1992648885

花谢尊前不敢香 2013-05-17

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好好看看url-pattern匹配规则。有扩展名的，直接去掉.扩展名映射

u010627130 2013-05-17

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引用 2 楼 Acesidonu 的回复:

匹配 <url-pattern>/Admin.shtml</url-pattern>就跳转了

<servlet-mapping> <servlet-name>AdminServlet</servlet-name> <url-pattern>/Admin.shtml</url-pattern> </servlet-mapping> 这个好像不是用的AdminServlet去匹配/Admin.shtml么？

u010627130 2013-05-17

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引用 2 楼 Acesidonu 的回复:

匹配 <url-pattern>/Admin.shtml</url-pattern>就跳转了

怎么匹配？在web.xml不是已经写了么？

Acesidonu 2013-05-17

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匹配 <url-pattern>/Admin.shtml</url-pattern>就跳转了

u010627130 2013-05-17

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我确定已经跳转到了/Admin.shtml，但是却停在了当前页面中，账号密码也是正确的！根据断点的调试，代码走了这里：


if(method.equals("one")){//admin登录
				String username = request.getParameter("username");
				String password = request.getParameter("password");
				if(username == null||username.trim().equals("")){
					request.setAttribute("message", "请正确输入用户名！");
					request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);
				}
				else if(password == null||password.trim().equals("")){
					request.setAttribute("message", "请输入密码！");
					request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);
				}
				else{
					String md5password = MD5.MD5(password);
					String agent = request.getHeader("user-agent"); 
					StringTokenizer st = new StringTokenizer(agent,";"); 
					String useros=st.nextToken();
					String loginip = request.getRemoteAddr();			
					int flag = loginbean.adminLogin(username,md5password, password,useros,loginip);
					switch (flag){
						case Constant.NAME_ERROR:
							request.setAttribute("message", "用户名错误！请确认管理权限！");
							request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);
							break;
						case Constant.PASSWORD_ERROR:
							request.setAttribute("message", "密码错误，请确认管理权限！");
							request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);
							break;
					}
				}
			}

lt3 2013-05-17

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不是已经执行到AdminServlet里面了吗？这跟web.xml的url没什么关系了，说明路径是正确，不然她怎么能到servlet呢！确保没有缓存，然后用断点在跟踪下。/

为什么我的jsp跳转不正确？我已经设置好了web.xml

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