登录跳转不了页面-CSDN论坛

⋅登录跳转不了页面 ⋅大神帮看一下这个问题救急 更多帖子 关注空间博客 qq_38115295 本版专家分：0 结帖率 0%: 大神帮看看是什么问题

0 2019-02-06 01:54:52

回复数 7 只看楼主引用举报楼主

mmzlove 本版专家分：0: 贴的图片看不清楚，最好贴代码

0 2019-02-06 19:42:23

只看TA 引用举报 #1 得分 0

⋅登录跳转不了页面 ⋅大神帮看一下这个问题救急 更多帖子 关注空间博客 qq_38115295 本版专家分：0: 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);
}
}

}

}

}

0 2019-02-06 21:27:49

只看TA 引用举报 #2 得分 0

⋅登录跳转不了页面 ⋅大神帮看一下这个问题救急 更多帖子 关注空间博客 qq_38115295 本版专家分：0: <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>

0 2019-02-06 21:28:47

只看TA 引用举报 #3    得分 0

⋅登录跳转不了页面 ⋅大神帮看一下这个问题救急 更多帖子 关注空间博客 qq_38115295 本版专家分：0: <?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>

0 2019-02-06 21:30:47

只看TA 引用举报 #4    得分 0

⋅此用户还没有发表过任何帖子 关注空间博客 qq_39936465 本版专家分：1095: 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>

0 2019-02-11 14:43:22

只看TA 引用举报 #5    得分 0

VamerTyv 本版专家分：50: 可以看看浏览器是否有提示,网络请求里面应该有报错,打开调试工具看看吧

0 2019-02-11 17:33:14

只看TA 引用举报 #6 得分 0

⋅此用户还没有发表过任何帖子 关注空间博客 qq_39936465 本版专家分：1095: 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">

0 2019-02-12 10:17:18

只看TA 引用举报 #7    得分 0

登录跳转不了页面 [问题点数：50分]