[Java知识库]tomcat启动失败(org.apache.catalina.core.StandardContext.startInternal One or more Filters failed to sta)

严重 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.StandardContext.startInternal One or more Filters failed to start. Full details will be found in the appropriate container log file

很多博客说是配置classes的logging.properties文件，其实对我而言没有作用，我就是实现Filter接口时去对三个方法都重写

如果只重写其中的doFilter()方法还是会报错，三个都重写之后就可以连接Tomcat了

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.io.IOException;

public class AdminFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("init");
    }

    @Override
    public void destroy() {
        System.out.println("destroy");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest httpServletRequest=(HttpServletRequest) servletRequest;
        HttpSession session = httpServletRequest.getSession();
        Object user = session.getAttribute("user");
        if (user==null){
            servletRequest.getRequestDispatcher("/login.jsp").forward(servletRequest,servletResponse);
            return;
        }else {
            filterChain.doFilter(servletRequest,servletResponse);
        }
    }
}

就是这么简单