登录跳转不了页面

陆之昂i 2019-02-06 01:54:52

大神帮看看是什么问题

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qq_39936465 2019-02-12

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我测试下来
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/LoginServlet</url-pattern>
</servlet-mapping>

这样写是无法通过tomcat9.0部署的，
web改为
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/111/LoginServlet</url-pattern>
</servlet-mapping>

action相应改一下测试可以正常运行
<FORM name="loginform" method="post" action="111/LoginServlet?opType=login">

qq_39936465 2019-02-11

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路径问题吧
web.xml 把loginServlet路径改下面试试。

<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/healthy/LoginServlet</url-pattern>
</servlet-mapping>

陆之昂i 2019-02-06

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<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:web="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <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>lx.servlet.AdminServlet</servlet-class> </servlet> <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>UserServlet</servlet-name> <servlet-class>lx.servlet.UserServlet</servlet-class> </servlet> <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>LoginServlet</servlet-name> <servlet-class>lx.servlet.LoginServlet</servlet-class> </servlet> <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>SysServlet</servlet-name> <servlet-class>lx.servlet.SysServlet</servlet-class> </servlet> <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>ExamServlet</servlet-name> <servlet-class>lx.servlet.ExamServlet</servlet-class> </servlet> <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>FormServlet</servlet-name> <servlet-class>lx.servlet.FormServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>AdminServlet</servlet-name> <url-pattern>/AdminServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>UserServlet</servlet-name> <url-pattern>/UserServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>LoginServlet</servlet-name> <url-pattern>/LoginServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>SysServlet</servlet-name> <url-pattern>/SysServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>ExamServlet</servlet-name> <url-pattern>/ExamServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>FormServlet</servlet-name> <url-pattern>/FormServlet</url-pattern> </servlet-mapping> </web-app>

陆之昂i 2019-02-06

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<FORM name="loginform" method="post" action="LoginServlet?opType=login"> <table width="100%" border="0" align="center" cellpadding="4" cellspacing="0" class="rtable"> <tbody> <tr class="tr1"> <td class="rldatee daslist"></td> <td class="rltitle daslist"> 系统用户登录</td> </tr> <tr class="tr1"> <td class="rldatee daslist">登录帐号：</td><input type=hidden name=method value="one"/> <td class="rltitle dotlist"><input type="text" size="30" name="username" required /></td> </tr> <tr class="tr1"> <td class="rldatee daslist">登录密码：</td> <td class="rltitle dotlist"><input type="password" size="30" name="password" required /></td> </tr> <tr class="tr1"> <td class="rldatee daslist">用户身份：</td> <td class="rltitle dotlist"> <input type="radio" name="usertype" value="用户" > 用户 <input type="radio" name="usertype" value="管理员" checked> 管理员</td> </tr> <tr class="tr1"> <td class="rldatee daslist"></td> <td class="rltitle daslist"><input type="submit" value="点击登录" style="width:80px;" /> </td> </tr> <tr class="tr1"> <td class="rldatee daslist"></td> <td class="rltitle daslist"> </td> </tr> </tbody> </table> </FORM>

陆之昂i 2019-02-06

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public class LoginServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String opType = request.getParameter("opType"); if (opType.equals("login")) { // 获取前端页面传递过来的参数值 request.setCharacterEncoding("utf-8"); String username = request.getParameter("username"); String password = request.getParameter("password"); String usertype = request.getParameter("usertype"); HttpSession session = request.getSession(); if (usertype.equals("管理员")) { ManagerDao managerdao = new ManagerDao(); Manager admin = managerdao.login(username, password); if(admin!=null) { //登录成功，保存用户会话信息，把用户登录信息保存起来，方便身份验证 session.setAttribute("admin", admin); session.setAttribute("usertype", usertype); request.getRequestDispatcher("admin/index.jsp").forward(request, response); }else { request.setAttribute("message", "登录信息错误！"); request.getRequestDispatcher("index.jsp").forward(request, response); } } else if (usertype.equals("用户")) { UserDao userdao = new UserDao(); User user = userdao.login(username, password); if(user!=null) { //登录成功，保存用户会话信息，把用户登录信息保存起来，方便身份验证 session.setAttribute("user", user); session.setAttribute("usertype", usertype); request.getRequestDispatcher("admin/lr/index.jsp").forward(request, response); }else { request.setAttribute("message", "登录信息错误！"); request.getRequestDispatcher("index.jsp").forward(request, response); } } } } }