Springboot登录拦截器以及过滤静态资源

今天药忘吃喽~ 2023-02-26 06:24 12阅读 0赞

### 写个登录拦截器类，实现HandlerInterceptor接口，并实现其方法。 ###

package com.jdkj.charge.intecepter;
    
    import java.io.IOException;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import com.jdkj.charge.entity.UserEntity;
    import org.springframework.web.servlet.HandlerInterceptor;
    import org.springframework.web.servlet.ModelAndView;
    
    public class LoginInterceptor implements HandlerInterceptor {
    
        /**
         * 在请求处理之前进行调用（Controller方法调用之前）
         */
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
            try {
                UserEntity user = (UserEntity) request.getSession().getAttribute("LOGIN_USER");
                if (user != null) {
                    return true;
                }
                response.sendRedirect(request.getContextPath() + "登录路径或登录界面");
            } catch (IOException e) {
                e.printStackTrace();
            }
            //如果设置为false时，被请求时，拦截器执行到此处将不会继续操作
            //如果设置为true时，请求将会继续执行后面的操作
            return false;
        }
    
        /**
         * 请求处理之后进行调用，但是在视图被渲染之前（Controller方法调用之后）
         */
        @Override
        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
    //         System.out.println("执行了TestInterceptor的postHandle方法");
        }
    
        /**
         * 在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行（主要是用于进行资源清理工作）
         */
        @Override
        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
    //        System.out.println("执行了TestInterceptor的afterCompletion方法");
        }
    
    }

### 将上述拦截器加入配置类中 ###

package com.jdkj.charge.config;
    
    import com.jdkj.charge.intecepter.LoginInterceptor;
    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;
    
    @Configuration
    public class WebConfig implements WebMvcConfigurer {
    
        @Override
        public void addInterceptors(InterceptorRegistry registry) {
            //注册TestInterceptor拦截器
            InterceptorRegistration registration = registry.addInterceptor(new LoginInterceptor());
            //所有路径都被拦截
            registration.addPathPatterns("/**");
            //添加不拦截路径
            registration.excludePathPatterns("/", "/to_login", "", "/charge/user/login", "/get_valid_code", "/**/*.html", "/**/*.js", "/**/*.css", "/**/*.json", "/**/*.icon");
        }
    }