[英]passing data from jsp to servlet return null
我的讲师登录表格有问题。 这是我的演讲者登录表单(JSP文件),与管理员登录表单(index.jsp)结合在一起:
<div class="form">
<div class="thumbnail"><img src="images/schedule_icon.png"/></div>
<form action="lecturerLogin" class="register-form">
<input type="text" name="lecturerID" placeholder="Lecturer ID"/>
<input type="password" name="lecturerPassword" placeholder="Password"/>
<button>Login</button>
<p class="message">Forgot password?<a href="#">Recover here</a></p>
</form>
<form action="adminLogin" class="login-form">
<input type="text" name="adminname" placeholder="Admin Name"/>
<input type="password" name="adminpassword" placeholder="Password"/>
<button>Login</button>
<p class="message">Not an admin? <a href="#">Login here</a></p>
</form>
</div>
这是XML文件:
<?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/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>myapp</display-name>
<servlet>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>CSP600.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/adminLogin</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>LoginLecturerServlet</servlet-name>
<servlet-class>CSP600.LoginLecturerServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginLecturerServlet</servlet-name>
<url-pattern>/lecturerLogin</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>-1</session-timeout>
</session-config>
</web-app>
这是我的Servlet(使用doGet):
try {
LecturerBean lecturer = new LecturerBean();
lecturer.setLecturerID(request.getParameter("lecturerid"));
lecturer.setLecturerPassword(request.getParameter("lecturerpassword"));
lecturer = LecturerDAO.lecturerlogin(lecturer);
if (lecturer.isValid()) {
HttpSession session = request.getSession(true);
session.setAttribute("currentSessionUser", lecturer);
response.sendRedirect("homeLecturer.jsp"); // logged-in page
}
else {
response.sendRedirect("invalidLogin.jsp"); // error page
}
}
catch (Throwable theException) {
System.out.println(theException);
}
我已经使用了相同的代码进行管理员登录(当然,我更改了必要的部分),并且效果很好。 但是,出于未知原因,不会传递来自JSP文件的输入数据。 因此,它将NULL返回给bean和DAO。 我该如何解决这个问题?
更改
lecturer.setLecturerID(request.getParameter("lecturerid"));
lecturer.setLecturerPassword(request.getParameter("lecturerpassword"));
至
lecturer.setLecturerID(request.getParameter("lecturerID"));
lecturer.setLecturerPassword(request.getParameter("lecturerPassword"));
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