<form action="<%=request.getContextPath() %>/servlet1/LoginServ" method="post">

账号<input type="text" name="username"/><br />

密码<input type="password" name="password"/>

<input type="submit" value="登录"/>

</form>

message /loginfilter/servlet1/LoginServ

description The requested resource is not available.

明明就在这个目录下  偏偏说不存在  (验证码根本看不清)