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SpringBoot如何配置拦截器呢？

下文笔者讲述SpringBoot配置拦截器的方法分享，如下所示

一、编写拦截器实现类，实现HandlerInterceptor接口

public class MyInterceptor implements HandlerInterceptor {@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {// 统一拦截，判断是否有登录（输入有账号密码，userName就会存储到session）Object value = request.getSession().getAttribute("Lotus");if (value != null) {return true;}else {request.getRequestDispatcher("/WEB-INF/views/user/login.jsp").forward(request, response);return false;}}@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {}@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {}
}

二、编写拦截器配置类，实现WebMvcConfigurer接口

@Configuration //一定要加上这个注解，成为Springboot的配置类，不然不会生效
public class WebMvcConfiguration implements WebMvcConfigurer {@Override   //拦截器配置 public void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(new MyInterceptor()) //拦截器注册对象.addPathPatterns("/**") //指定要拦截的请求.excludePathPatterns("/user/login"); //排除请求}
}