SpringBoot实战之5 注册interceptor

系统管理员 2022-06-04 05:14 339阅读 0赞

## 前言 ##

HandleInterceptor的功能跟Filter类似，但是范围要小一些，只拦截webmvc的接口请求，不拦截静态资源。即request请求之前有拦截方法，request请求之后有拦截方法。

## 实现方法 ##

实现自定义拦截器需要3步：

1、创建我们自己的拦截器类并实现 HandlerInterceptor 接口。

2、创建一个Java类继承WebMvcConfigurerAdapter，并重写 addInterceptors 方法。

3、实例化我们自定义的拦截器，然后将对像手动添加到拦截器链中（在addInterceptors方法中添加）

## code实现 ##

MyInterceptor1.java

public class MyInterceptor1 implements HandlerInterceptor{ 
        private final Logger _logger = LoggerFactory.getLogger(this.getClass()) ;
        @Override
        public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
            _logger.info("this is MyInterceptor1 preHandle");
            // 只有返回true才会继续向下执行，返回false取消当前请求
            return true;
        }
    
        @Override
        public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
            _logger.info("this is MyInterceptor1 postHandle");
        }
    
        @Override
        public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
            _logger.info("this is MyInterceptor1 afterCompletion");
        }
    }

MyInterceptor2.java

public class MyInterceptor2 implements HandlerInterceptor{ 
        private final Logger _logger = LoggerFactory.getLogger(this.getClass()) ;
        @Override
        public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
            _logger.info("this is MyInterceptor2 preHandle");
            return true;
        }
    
        @Override
        public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
            _logger.info("this is MyInterceptor2 postHandle");
        }
    
        @Override
        public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
            _logger.info("this is MyInterceptor2 afterCompletion");
        }
    }

注册Interceptor拦截器链

@Configuration
    public class MyInterceptorConfig extends WebMvcConfigurerAdapter { 
    
        @Override
        public void addInterceptors(InterceptorRegistry registry) {
            registry.addInterceptor(new MyInterceptor1()).addPathPatterns("/**");
            registry.addInterceptor(new MyInterceptor2()).addPathPatterns("/**");
            super.addInterceptors(registry);
        }
    }

程序入口

@SpringBootApplication
    public class SpringBootInterceptorApplication { 
        public static void main(String[] args) {
            SpringApplication.run(SpringBootInterceptorApplication.class,args);
        }
    }

## 源码 ##

[springboot-interceptor][]

## 历史文章 ##

[SpringBoot实战之入门][SpringBoot]

[springboot实战之文章汇总][springboot]

[springboot实战之读取配置文件][springboot 1]

[springboot实战之整合jsp模版引擎][springboot_jsp]

[springboot实战之整合freemarker模版引擎][springboot_freemarker]

[springboot实战之注册自定义Servlet][springboot_Servlet]

[springboot实战之注册filter和listener][springboot_filter_listener]

[springboot-interceptor]: https://github.com/shiyuan2he/springboot/tree/master/springboot-interceptor
[SpringBoot]: http://blog.csdn.net/u012806787/article/details/78694912
[springboot]: http://blog.csdn.net/u012806787/article/details/78686998
[springboot 1]: http://blog.csdn.net/u012806787/article/details/78583814
[springboot_jsp]: http://blog.csdn.net/u012806787/article/details/78700999
[springboot_freemarker]: http://blog.csdn.net/u012806787/article/details/78706156
[springboot_Servlet]: http://blog.csdn.net/u012806787/article/details/78710113
[springboot_filter_listener]: http://blog.csdn.net/u012806787/article/details/78715725