springboot配置 java servlet的Filter过滤器

「爱情、让人受尽委屈。」 2021-09-26 09:32 372阅读 0赞

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.annotation.WebFilter;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.apache.log4j.Logger;
    @WebFilter(filterName="myFilter",urlPatterns="/*")
    //WebFilter注解会让springboot知道这是个过滤器，会跟随boot启动urlPatterns就是要过滤的路径，filterName过滤器名字
    public class ActionFilter implements Filter{ 
         private HttpServletRequest httpRequest;
         private HttpServletResponse httpResponse;
         protected final Logger logger = Logger.getLogger(this.getClass());
        @Override
        public void init(FilterConfig filterConfig) throws ServletException {
            // TODO Auto-generated method stub
    
             System.out.println("过滤器初始化");
        }
    
        @Override
        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                throws IOException, ServletException {
            System.out.println("执行过滤操作");
            httpRequest=(HttpServletRequest)request;
            httpResponse=(HttpServletResponse)response;
            logger.info("url "+httpRequest.getRequestURI());
            // TODO Auto-generated method stub
            chain.doFilter(request, response);
    
        }
    
        @Override
        public void destroy() {
             System.out.println("过滤器销毁");
            // TODO Auto-generated method stub
    
        }
    
    }