SpringBoot2.0之后拦截器配置需要实现WebMvcConfigure接口
执行顺序:过滤器-->拦截器:preHandle-->controller -->拦截器:视图渲染前-->postHandler-->拦截器:视图渲染-->afterCompletion
@Component
public class LangFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
Locale locale = request.getLocale();
System.out.println("过滤器: " + locale);
chain.doFilter(request,response);
}
@Override
public void destroy() {
}
}
@Component
public class LangInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
Locale locale = request.getLocale();
System.out.println("拦截器: " + locale);
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 {
}
}
注册拦截器,实现拦截器最重要的步骤(和)启动类处于同一目录下):
@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {
// 这里使用autowired无法实现拦截器
@Bean
LangInterceptor langInterceptor() {
return new LangInterceptor();
}
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(langInterceptor()).addPathPatterns("/**");
}
}