SpringBoot配置拦截器

层级结构

1.自定义拦截器类，实现HandlerInterceptor

package com.umi.ga.center_api.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

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

public class LogInterceptor implements HandlerInterceptor {
    public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
            throws Exception {
        // TODO Auto-generated method stub
    }

    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
            throws Exception {
        // TODO Auto-generated method stub
    }

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object arg2) throws Exception {
//        HttpSession session = request.getSession();
//        System.err.println(session.getId());
//        System.err.println(request.getSession().getId());
        Object centerUser = request.getSession().getAttribute("centeruser");
        String ip = request.getRemoteAddr();
        System.out.println(centerUser+"\t"+ip);
//        if (null == centerUser) {
//            System.err.println("------------------>:权限校验失败");
////            response.sendRedirect("http://www.baidu.com");
//            return false;
//        }
//        System.err.println("------------------>:权限校验成功");
        return true;
    }

}

2.配置拦截规则

创建一个配置类并实现WebMvcConfigurer接口， 覆盖接口中的addInterceptors方法，并为该配置类添加@Configuration注解，标注此类为一个配置类，让Spring Boot 扫描到，这里的操作就相当于SpringMVC的注册拦截器 ，@Configuration就相当于一个applicationContext-mvc.xml

package com.umi.ga.center_api.config;

import com.umi.ga.center_api.interceptor.LogInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class InterceptorConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //需要拦截的路径，/**表示需要拦截所有请求
//        String[]addPathPatterns={"/**"};
        String[]addPathPatterns={"/loginAccount"};//拦截登录接口
        //不需要拦截的路径
        String [] excludePathPaterns={
                "/static/**"
        };
        //注册一个登录拦截器
        registry.addInterceptor(new LogInterceptor())
                .addPathPatterns(addPathPatterns)
                .excludePathPatterns(excludePathPaterns);
        //注册一个权限拦截器  如果有多个拦截器 ，只需要添加以下一行代码
        //registry.addInterceptor(new LoginInterceptor())
        // .addPathPatterns(addPathPatterns)
        // .excludePathPatterns(excludePathPatterns);

    }
}