Java 过滤器和拦截器

mport lombok.extern.slf4j.Slf4j;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName="myFilter",urlPatterns="/*")
@Slf4j
public class MyFilter implements Filter {
    @Override
    public void init(FilterConfig arg0) {
       log.info("初始化过滤器!");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
            throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        log.info("请求地址:"+request.getRequestURI());
        // 交给下一个过滤器或servlet处理
        filterChain.doFilter(servletRequest,servletResponse);

        //HttpServletResponse response = (HttpServletResponse) servletResponse;
        //response.sendRedirect("http://baidu.com");//重定向
    }

    @Override
    public void destroy() {
        log.info("销毁过滤器!");
    }
}

@ServletComponentScan

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Slf4j
@Component
public class AuthorInterceptor implements HandlerInterceptor {
    /**
     * 目标方法执行前
     * 该方法在控制器处理请求方法前执行，其返回值表示是否中断后续操作
     * 返回 true 表示继续向下执行，返回 false 表示中断后续操作
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        return true;
    }
    /**
     * 目标方法执行后
     * 该方法在控制器处理请求方法调用之后、解析视图之前执行
     * 可以通过此方法对请求域中的模型和视图做进一步修改
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        log.info("postHandle执行{}", modelAndView);
    }
    /**
     * 页面渲染后
     * 该方法在视图渲染结束后执行
     * 可以通过此方法实现资源清理、记录日志信息等工作
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        log.info("afterCompletion执行异常{}", ex);
    }
}

import com.tansun.springcloud.project.b.web.interceptor.AuthorInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.annotation.Resource;

@Configuration
public class InterceptorConfig implements WebMvcConfigurer {
    @Resource
    private AuthorInterceptor authorInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //注册自己的拦截器,并设置拦截的请求路径
        //addPathPatterns为拦截此请求路径的请求
        //excludePathPatterns为不拦截此路径的请求
        //addPathPatterns拦截的路径
        String[] addPathPatterns = {
                "/order/**"
        };
        //excludePathPatterns排除的路径
        String[] excludePathPatterns = {
                ""
        };
        registry.addInterceptor(authorInterceptor).addPathPatterns(addPathPatterns).excludePathPatterns(excludePathPatterns);
    }
}