SpringBoot2.0拦截器 与 1.X版本拦截器 的实现

1.5  版本 

先写个拦截器，跟xml配置方式一样，然后将拦截器加入spring容器管理 。接着创建 配置文件类 继承 WebMvcConfigurerAdapter 类，重写父类方法addInterceptors

　　　　

@Component
public class MyInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
       //true放行  false拦截
        System.out.println("拦截");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
        System.out.println("preHandle()执行过后再执行");
        System.out.println("controller执行前再执行");
    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
        System.out.println("controller执行过后再执行");
    }
}

@Configuration
public class WebConfig extends WebMvcConfigurerAdapter{

    @Autowired
    private MyInterceptor myInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(myInterceptor)
                .addPathPatterns("/**")
                .excludePathPatterns("/index","/login");
        super.addInterceptors(registry);
    }

}

2.0  版本跟1.5一样 就是配置类需要的是实现WebMvcConfigurer接口不再是继承 WebMvcConfigurerAdapter 类 ，通过spring代码可以发现   WebMvcConfigurerAdapter implements WebMvcConfigurer 这种关系.

@Configuration
public class MvcConfig  implements WebMvcConfigurer {
    @Autowired
    private MyInterceptor myInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(webInterceptor())
                .addPathPatterns("/**")
                .excludePathPatterns("/asserts/**","/receiveToken","/ssoLogout","/ssoDeleteToken");
        ;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
    //addResourceLocations指的是文件放置的目录，addResoureHandler指的是对外暴露的访问路径
        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
    }

}