Springboot06配制拦截器

1 创建拦截器  SessionInterceptor

import com.springboot.demo.pojo.UserModel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

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

public class SessionInterceptor implements HandlerInterceptor {

    private static final Logger log = LoggerFactory.getLogger(SessionInterceptor.class);

    /**
     * 进入controller层之前拦截请求
     * @param request
     * @param response
     * @param o
     * @return
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {

        log.info("---------------------开始进入请求地址拦截----------------------------");

        UserModel user = (UserModel) request.getSession().getAttribute("user");
        if (user == null) {
            response.sendRedirect(request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+request.getContextPath() + "/login");
            return false;
        }

        return true;

    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
        log.info("--------------处理请求完成后视图渲染之前的处理操作---------------");
    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
        log.info("---------------视图渲染之后的操作-------------------------0");
    }

}

2 配制拦截器以及拦截规则 

import com.springboot.demo.interceptor.SessionInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
public class SessionConfiguration extends WebMvcConfigurerAdapter {

    /**
     * 添加拦截器
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        /**
         * addPathPatterns 用于添加拦截规则
         * excludePathPatterns 用于排除拦截
         */
        registry.addInterceptor(new SessionInterceptor()).addPathPatterns("/**").excludePathPatterns("**/app/**");
    }


    /**
     * 配置静态资源
     * @param registry
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        super.addResourceHandlers(registry);
        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
        registry.addResourceHandler("/templates/**").addResourceLocations("classpath:/templates/");
    }
}

3 目录结构 

4 启动服务 访问 http://localhost:8080/users/list