spring-boot添加自定义拦截器

Posted 2020-10-30 Hellxz博客

spring-boot中的WebMvcConfigurerAdapter类提供了很多自定义操作的方法，先贴出来大家看看

 1 package org.springframework.web.servlet.config.annotation;
 2 
 3 import java.util.List;
 4 import org.springframework.format.FormatterRegistry;
 5 import org.springframework.http.converter.HttpMessageConverter;
 6 import org.springframework.validation.MessageCodesResolver;
 7 import org.springframework.validation.Validator;
 8 import org.springframework.web.method.support.HandlerMethodArgumentResolver;
 9 import org.springframework.web.method.support.HandlerMethodReturnValueHandler;
10 import org.springframework.web.servlet.HandlerExceptionResolver;
11 
12 public abstract class WebMvcConfigurerAdapter implements WebMvcConfigurer {
13     public WebMvcConfigurerAdapter() {
14     }
15         
16     public void configurePathMatch(PathMatchConfigurer configurer) {
17     }
18 
19     public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
20     }
21 
22     public void configureAsyncSupport(AsyncSupportConfigurer configurer) {
23     }
24 
25     public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
26     }
27 
28     public void addFormatters(FormatterRegistry registry) {
29     }
30 
31     public void addInterceptors(InterceptorRegistry registry) {
32     }
33 
34     public void addResourceHandlers(ResourceHandlerRegistry registry) {
35     }
36 
37     public void addCorsMappings(CorsRegistry registry) {
38     }
39 
40     public void addViewControllers(ViewControllerRegistry registry) {
41     }
42 
43     public void configureViewResolvers(ViewResolverRegistry registry) {
44     }
45 
46     public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
47     }
48 
49     public void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> returnValueHandlers) {
50     }
51 
52     public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
53     }
54 
55     public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
56     }
57 
58     public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
59     }
60 
61     public void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
62     }
63 
64     public Validator getValidator() {
65         return null;
66     }
67 
68     public MessageCodesResolver getMessageCodesResolver() {
69         return null;
70     }
71 }

如上代码的实现都是空的，也就是说我们想要完成自定义一些操作，只需要重写这个类中对应的方法，就可以实现

比如昨晚写了篇自定义springboot的消息转换器 ，其中的一种实现就是通过重写这个类的方法

下边贴一下重写addInterceptors从而实现自定义拦截器的demo

 1 package com.itcast.springboot;
 2 
 3 import org.springframework.context.annotation.Configuration;
 4 import org.springframework.web.servlet.HandlerInterceptor;
 5 import org.springframework.web.servlet.ModelAndView;
 6 import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
 7 import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
 8 
 9 import javax.servlet.http.HttpServletRequest;
10 import javax.servlet.http.HttpServletResponse;
11 
12 /**
13  * @Author : Hellxz
14  * @Description:自定义拦截器
15  * @Date : 2018/4/8 12:36
16  */
17 @Configuration
18 public class MyInterceptor extends WebMvcConfigurerAdapter {
19     /**
20      * @Author: Hellxz
21      * @Description: 添加自定义拦截器
22      * @Date: 2018/4/8 12:39
23      */
24     @Override
25     public void addInterceptors(InterceptorRegistry registry) {
26         /**
27          * 自定义handlerInterceptor,匿名内部类，也可以单独提出来一个类
28          */
29         HandlerInterceptor handlerInterceptor = new HandlerInterceptor() {
30             @Override
31             public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
32                 System.out.println("—————进入拦截器");
33                 return true;
34             }
35 
36             @Override
37             public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
38             }
39 
40             @Override
41             public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
42             }
43         };
44         //将这个handler添加到签名认证拦截器中
45         registry.addInterceptor(handlerInterceptor);
46 //        添加拦截uri
47 //        registry.addInterceptor(handlerInterceptor).addPathPatterns("/user/**");
48         super.addInterceptors(registry);
49     }
50 
51 }