springboot拦截器

拦截器类

package com.rikka.article.interceptor;

import com.rikka.common.result.BaseResult;
import com.rikka.redis.RedisService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

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

public class ArticleInterceptor implements HandlerInterceptor {

    @Autowired
    private RedisService service;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
        HttpSession session = request.getSession();
        if(session==null){
            return false;
        }
        if(session.getAttribute("userId")!=null){
            //session是否一致
            if(service.get(session.getId())!=null&&service.get(session.getId()).equals(session.getId())){
                return true;
            }
        }
        response401(response);
        System.out.println("ljq");
        return false;
    }

    private void response401(HttpServletResponse response)
    {
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json; charset=utf-8");

        try
        {
            response.getWriter().print(BaseResult.error("用户未登录！"));
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {

    }
}

配置拦截器类

package com.rikka.article.interceptor.config;

import com.rikka.article.interceptor.ArticleInterceptor;
import org.springframework.context.annotation.Bean;
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 ArticleInterceptorConfig implements WebMvcConfigurer {

    @Bean
    public ArticleInterceptor getArticleInterceptor(){
        return new ArticleInterceptor();
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(getArticleInterceptor()).addPathPatterns("/u/*").excludePathPatterns("/u/login")
                .excludePathPatterns("/u/register");
    }
}

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