【SpringBoot学习】3、SpringBoot 多个版本配置简单的拦截器

springboot1.x 和 springboot2.x 配置拦截器区别就在于注册拦截器的方式不同，springboot1.x 配置方法是：

public class WebAppConfig extends WebMvcConfigurerAdapter {

springboot2.x 配置方法是：

public class LoginConfigurer implements WebMvcConfigurer {

下面详细的介绍使用方法。

一、springboot1.x 配置方法

1、注册拦截器

public class WebAppConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //注册自定义拦截器，添加拦截路径和排除拦截路径
        registry.addInterceptor(new InterceptorConfig()).addPathPatterns("user/**").excludePathPatterns("admin/login");
    }
}

2、实现 实现 HandlerInterceptor 接口

public class InterceptorConfig  implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {

    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}

二、springboot2.x 配置方法

一、注册拦截器

@Configuration
public class LoginConfigurer implements WebMvcConfigurer {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 添加一个拦截器，连接以/authorize为前缀的url路径
        registry.addInterceptor(new LoginURLInterceptor()).addPathPatterns("/pageController/authorize/**");
    }
}

2、实现 HandlerInterceptor 接口

public class LoginURLInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("访问了/pageController/loginPage路径。");
        return true;
    }

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

    }

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

    }
}