eclipse下写了个过滤器不能编译？
写了个过滤器，用来判断用户是否登录，没提示错误但就是没编译，什么问题啊？
import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginCheckFilter implements Filter{
protected FilterConfig filterConfig;

public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest)request;
HttpServletResponse httpResponse = (HttpServletResponse)response;
boolean isValid = true;
String uriStr = httpRequest.getRequestURI().toUpperCase();
if(uriStr.indexOf( "LOGIN.JSP ") == -1 && httpRequest.getSession().getAttribute( "userBean ") == null)
isValid = false;
if(isValid){
filterChain.doFilter(request, response);
}
else{
httpResponse.sendRedirect( "login.jsp ");
}
}

public void init(FilterConfig filterconfig) throws ServletException {
filterConfig = filterconfig;


}

public void destroy() {
filterConfig = null;

}
}

[解决办法]
应该是ECLIPSE的问题
我也常常碰到这样的情况
有时侯CLEAN就可以了
有时候要重新启动ECLIPSE

[解决办法]
学习
[解决办法]
用 Ctrl + a 然后 Ctrl + c 然后 Ctrl + x 然后 Ctrl + s 然后 Ctrl + v 最后 Alt + F + S