doFilter方法里:
HttpServletRequest request=(HttpServletRequest)servletrequest;
HttpServletResponse response = (HttpServletResponse) servletresponse;
UserSession user= (UserSession)request.getSession().getAttribute("useroject");
if(user==null){
context.getRequestDispatcher(redirectUrl);//redirectUrl 为/login.jsp
//return;
} else {
filterchain.doFilter(request, response);
}
问题打不开login.jsp 空白,不知道为什么会这样,之前getRequestDispatcher 后面加return;也是这样。
这样写:
context.getRequestDispatcher(redirectUrl).forward(request, response);
会报这样的错误。
Error 500--Internal Server Error
java.lang.StackOverflowError
接着我又改成if(user==null){
context.getRequestDispatcher(redirectUrl);
} else {
filterchain.doFilter(request, response);
}
filterchain.doFilter(request, response);加
可以访问:
Error 500--Internal Server Error
java.lang.IndexOutOfBoundsException: Index: 3, Size: 3
后来我又改成:
if(user==null){
response.sendRedirect("http://" +request.getHeader("Host")+redirectUrl);
} else {
filterchain.doFilter(request, response);
}这回可以过去了,请问题我前两个写的有毛病吗。
HttpServletRequest request=(HttpServletRequest)servletrequest;
HttpServletResponse response = (HttpServletResponse) servletresponse;
UserSession user= (UserSession)request.getSession().getAttribute("useroject");
if(user==null){
context.getRequestDispatcher(redirectUrl);//redirectUrl 为/login.jsp
//return;
} else {
filterchain.doFilter(request, response);
}
问题打不开login.jsp 空白,不知道为什么会这样,之前getRequestDispatcher 后面加return;也是这样。
这样写:
context.getRequestDispatcher(redirectUrl).forward(request, response);
会报这样的错误。
Error 500--Internal Server Error
java.lang.StackOverflowError
接着我又改成if(user==null){
context.getRequestDispatcher(redirectUrl);
} else {
filterchain.doFilter(request, response);
}
filterchain.doFilter(request, response);加
可以访问:
Error 500--Internal Server Error
java.lang.IndexOutOfBoundsException: Index: 3, Size: 3
后来我又改成:
if(user==null){
response.sendRedirect("http://" +request.getHeader("Host")+redirectUrl);
} else {
filterchain.doFilter(request, response);
}这回可以过去了,请问题我前两个写的有毛病吗。
//UserSession user= (UserSession)request.getSession().getAttribute("useroject");if(request.getSession().getAttribute("useroject")==null){
request.getRequestDispatcher(redirectUrl).forward(request,response);
}
else {
filterchain.doFilter(request, response);
}
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