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我在應用程序中創建了一個過濾器來處理登錄/註銷場景。過濾器映射不起作用。在我的web.xml，如果我把<url-pattern>/LoginServlet/*</url-pattern>，過濾器映射的作品，但如果我把一個名稱的jsp，那麼它不起作用<url-pattern>/LoginServlet/list.jsp</url-pattern>。我不想爲所有jsps調用過濾器。過濾器映射在web.xml中不起作用
這是我的過濾器。
public class LoginFilter implements Filter{
public void destroy() {
// TODO Auto-generated method stub
}
public void doFilter(ServletRequest req, ServletResponse res,
FilterChain chain) throws IOException, ServletException {
System.out.println("LoginFilter : doFilter : Start");
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) res;
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
System.out.println("LoginFilter : doFilter : 111111");
HttpSession session = request.getSession(false);
if (session == null || session.getAttribute("user") == null) {
System.out.println("LoginFilter : doFilter : 222222");
response.sendRedirect("login.jsp");
//response.sendRedirect(request.getContextPath() + "/login.jsp");
//response.sendRedirect("login.jsp");
//response.sendRedirect("http://localhost:8080/PROJECT_ELMS/login.jsp");
}else {
System.out.println("LoginFilter : doFilter : 33333333");
chain.doFilter(request, response);
}
}
public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
}
}
這是我的web.xml。
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
<listener>
<listener-class>edu.umd.enpm613.helper.StartupListner</listener-class>
</listener>
<filter>
<filter-name>loginFilter</filter-name>
<filter-class>edu.umd.enpm613.servlet.LoginFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>loginFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<description></description>
<display-name>LoginServlet</display-name>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>edu.umd.enpm613.servlet.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/LoginServlet/*</url-pattern>
</servlet-mapping>
<servlet>
<description></description>
<display-name>StudentServlet</display-name>
<servlet-name>StudentServlet</servlet-name>
<servlet-class>edu.umd.enpm613.servlet.StudentServlet</servlet-class>
</servlet>
LoginServlet是：
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* Default constructor.
*/
public LoginServlet() {
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
@SuppressWarnings("null")
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("LoginServlet : doPost : Start");
LoginDTO returnedDTO = null;
String userEmailId = request.getParameter("userid");
try {
request.getSession(true).setAttribute("user", userEmailId);
String userPassword = request.getParameter("password");
LoginDTO loginDto = new LoginDTO();
loginDto.setUserEmailId(userEmailId);
loginDto.setUserPassword(userPassword);
returnedDTO = LoginImpl.getUserCategory(loginDto);
String category = returnedDTO.getUserCategory();
if (category.equals(ELMSConstants.CATEGORY_STUDENT)) {
//request.getRequestDispatcher("student_home.jsp").forward(request,response);
System.out.println("LoginServlet : doPost : Start" +request.getContextPath());
System.out.println("LoginServlet : doPost : Start" +request.getRequestURI());
System.out.println("LoginServlet : doPost : Start" + request.getRequestURL());
request.getRequestDispatcher("list.jsp").forward(request,response);
}
if (category.equals(ELMSConstants.CATEGORY_TEACHER)) {
System.out.println("LoginServlet : doPost : 22222222222");
request.getRequestDispatcher("professor_home.jsp").forward(request,response);
}
}catch (ELMSException exp){
exp.printStackTrace();
System.out.println("LoginServlet : doPost : error message is" + exp.getMessage());
if (exp.getMessage().equals(ELMSException.USER_NEED_TO_CHANGE_PASSWORD)) {
System.out.println("LoginServlet : doPost : 1111111111");
request.setAttribute("errorMessage", exp.getMessage());
request.setAttribute("userName", userEmailId);
request.getRequestDispatcher("changePassword.jsp").forward(request,response);
}
if (!exp.getMessage().equals(ELMSException.USER_NEED_TO_CHANGE_PASSWORD)) {
request.setAttribute("errorMessage", exp.getMessage());
request.getRequestDispatcher("login.jsp").forward(request,response);
}
}
}
}
給出了正確的jsp路徑嗎？ /LoginServlet/list.jsp可能不是正確的路徑。 – Santo 2014-10-29 18:54:29