Java拦截器实现拦截controller方法

1，定义拦截器

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class AuthorityInterceptor extends HandlerInterceptorAdapter {
    private static final Logger logger = LoggerFactory.getLogger(AuthorityInterceptor.class);
 
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        logger.info("进入到拦截器中:preHandle() 方法");
        HandlerMethod handlerMethod=(HandlerMethod)handler;
        AccessIntercept loginVerify=handlerMethod.getMethodAnnotation(AccessIntercept.class);
        if (loginVerify!=null){
            System.out.println(loginVerify.IsIntercept());
            logger.info("不需要对 @loginVerify注解方法 进行拦截");
            return false;
        }else {
            logger.info("对非@loginVerify注解方法 进行拦截处理");
            System.out.println(request.getServletPath());
            System.out.println(request.getParameter("id"));
            return true;
        }
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        logger.info("进入到拦截器中:postHandle() 方法中");
        System.out.println(request.getRequestURI());
    }
 
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        logger.info("进入到拦截器中:afterCompletion() 方法中");
        System.out.println(request.getServletPath());
    }
}

2，配置拦截器

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
public class InterceptorAdapterConfig extends WebMvcConfigurerAdapter {
    @Autowired
//    private RequestLimitIntercept authorityInterceptor;
    private AuthorityInterceptor authorityInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry)
    {
        //注册自己的拦截器并设置拦截的请求路径
        registry.addInterceptor(authorityInterceptor).addPathPatterns("/**");
        super.addInterceptors(registry);
    }
}

3，自定义注解

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface AccessIntercept {
    boolean IsIntercept() default true;
}

4，使用自定义注解

在controller中的方法上面使用@AccessIntercept注解。