SpringBoot实现登录拦截器

在springBoot只给你如果不设置登录拦截器的话，在任何情况下都可以访问该项目中的所有资源

1. 拦截器主要方法两个
   
   1.LoginInterceptor 主要继承HandlerInterceptor 类来实现

package com.example.erp_project.config;

import com.example.erp_project.entity.UserEntity;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

/**
 * @author Lolo don‘t feel
 */
@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession();
        //从seesion中取出当前登录的信息，
        Object account = session.getAttribute("phone");
        //如果为空跳转到登录页面，并弹出提示信息
        if (account == null) {
            //System.out.println("用户未登陆");
            //PageController中会跳转到同名的页面
            response.sendRedirect("login");
            return false;
        } else {
            return true;
        }
    }
}

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2.WebConfigurer 主要继承WebMvcConfigurer 类实现

package com.example.erp_project.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * @author Lolo don‘t feel
 */
@Configuration
public class WebConfigurer implements WebMvcConfigurer {
    @Autowired
    private LoginInterceptor loginInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //拦截所有的资源addPathPatterns("/**")，释放登陆相关的资源excludePathPatterns(
        registry.addInterceptor(loginInterceptor).addPathPatterns("/**").excludePathPatterns(
                "/js/**", "/layui/**", "/dist/sliderVerify/**","/lib/**","/css/**",
                "/images/**", "/register", "/login", "/restPassword",
                "/agreement","/auth/login","/auth/register","/auth/restPassword"
        );
    }
}

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