springboot之拦截器

拦截器：

　　

package com.example.demo;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

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

@Configuration
public class WebConfiguration implements WebMvcConfigurer {


    @Bean
    public SecurityInterceptor getSecurityInterceptor() {
        return new SecurityInterceptor();
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        InterceptorRegistration addInterceptor = registry.addInterceptor(getSecurityInterceptor());
        //排除配置
        addInterceptor.excludePathPatterns("/login/**");//排除登录
        // 拦截配置
        addInterceptor.addPathPatterns("/**/**");
    }

    private class SecurityInterceptor extends HandlerInterceptorAdapter {
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws IOException {
            HttpSession session = request.getSession();
            //判断是否已有该用户登录的session
            if (session.getAttribute("account") != null) {
                return true;
            }
            response.getWriter().print("not login");
            return false;
        }
    }
}

　　控制器：

package com.example.demo;

import com.example.demo.bean.User;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpSession;


@RestController
public class MailController {


    @GetMapping("/user")
    public User send() {

        User user = new User();
        user.setName("Li Hua");
        user.setAge(25);
        user.setSex(1);
        return user;

    }

    @GetMapping("/login")
    public String login(HttpSession session) {
       session.setAttribute("account", "ggband");
        return "登录成功";

    }
}