從C#到Java（Spring攔截器HandlerInterceptor ）

Spring自帶了一套攔截器HandlerInterceptor，相似AspNet中的Filter。

public class ApiInterceptor implements HandlerInterceptor {
    //請求以前
    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
        System.out.println("進入攔截器");
        return true;
    }
    //請求時
    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
 
    }
    //請求完成
    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
 
    }
}

　同時須要在配置類中重寫addInterceptors方法

@SpringBootConfiguration
public class WebConfig extends WebMvcConfigurationSupport{
 
    @Override
    protected void addInterceptors(InterceptorRegistry registry) {
        super.addInterceptors(registry);
        registry.addInterceptor(new ApiInterceptor());
    }
}