SpringBoot2.0 是基于 spring 5.0 實作的。
在Spring 5.0 中,已經将 WebMvcConfigurerAdapter 抽象類加上 @Deprecated 注解 記為過時。
下面的代碼就是過時方法:
package com.handlerinterceptor_demo.handlerinterceptor_demo.config;
import com.handlerinterceptor_demo.handlerinterceptor_demo.interceptors.UserIDHandlerInterceptor;
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;
/**
* @author
*/
@Configuration
public class WebAppConfig extends WebMvcConfigurerAdapter{
@Autowired
private UserIDHandlerInterceptor userIDHandlerInterceptor;
/**
* addPathPatterns 添加攔截規則
* excludePathPatterns 排除攔截規則
*
* @param registry
*/
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(userIDHandlerInterceptor).addPathPatterns("/**/*");
}
}
我們來看看 WebMvcConfigurerAdapter 方法,上面已經加了@Deprecated 注解
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
package org.springframework.web.servlet.config.annotation;
import java.util.List;
import org.springframework.format.FormatterRegistry;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.lang.Nullable;
import org.springframework.validation.MessageCodesResolver;
import org.springframework.validation.Validator;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.HandlerMethodReturnValueHandler;
import org.springframework.web.servlet.HandlerExceptionResolver;
/** @deprecated */
@Deprecated
public abstract class WebMvcConfigurerAdapter implements WebMvcConfigurer {
public WebMvcConfigurerAdapter() {
}
public void configurePathMatch(PathMatchConfigurer configurer) {
}
public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
}
public void configureAsyncSupport(AsyncSupportConfigurer configurer) {
}
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
}
public void addFormatters(FormatterRegistry registry) {
}
public void addInterceptors(InterceptorRegistry registry) {
}
public void addResourceHandlers(ResourceHandlerRegistry registry) {
}
public void addCorsMappings(CorsRegistry registry) {
}
public void addViewControllers(ViewControllerRegistry registry) {
}
public void configureViewResolvers(ViewResolverRegistry registry) {
}
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
}
public void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> returnValueHandlers) {
}
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
}
public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
}
public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
}
public void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
}
@Nullable
public Validator getValidator() {
return null;
}
@Nullable
public MessageCodesResolver getMessageCodesResolver() {
return null;
}
}
現在我們采用新的方法來處理:
方法一(官方推介):
我們看到,WebMvcConfigurerAdapter 抽象類實作了 WebMvcConfigurer 接口,這裡我們隻需要将 extends WebMvcConfigurerAdapter 替換為 implements WebMvcConfigurer 即可。代碼如下:
package com.handlerinterceptor_demo.handlerinterceptor_demo.config;
import com.handlerinterceptor_demo.handlerinterceptor_demo.interceptors.UserIDHandlerInterceptor;
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.WebMvcConfigurer;
/**
* @author
*/
@Configuration
public class WebAppConfig implements WebMvcConfigurer{
@Autowired
private UserIDHandlerInterceptor userIDHandlerInterceptor;
/**
* addPathPatterns 添加攔截規則
* excludePathPatterns 排除攔截規則
*
* @param registry
*/
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(userIDHandlerInterceptor).addPathPatterns("/**/*");
}
}
方法二(不推介,也過期了):
繼承 WebMvcConfigurationSupport,代碼如下:
package com.handlerinterceptor_demo.handlerinterceptor_demo.config;
import com.handlerinterceptor_demo.handlerinterceptor_demo.interceptors.UserIDHandlerInterceptor;
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.WebMvcConfigurationSupport;
/**
* @author
*/
@Configuration
public class WebAppConfig extends WebMvcConfigurationSupport{
@Autowired
private UserIDHandlerInterceptor userIDHandlerInterceptor;
/**
* addPathPatterns 添加攔截規則
* excludePathPatterns 排除攔截規則
*
* @param registry
*/
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(userIDHandlerInterceptor).addPathPatterns("/**/*");
super.addInterceptors(registry);
}
}
PS:Java 畢竟單繼承多實作,而且實作接口也是官方推介的做法。是以推介方法一。