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SpringBoot添加自定义拦截器的实现代码

在controller层时,往往会需要校验或验证某些操作,而在每个controller写重复代码,工作量比较大,这里在springboot项目中 ,通过继承webmvcconfigureradapter,添加 拦截器 。

1、webmvcconfigureradapter源码

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/*

  * copyright 2002-2016 the original author or authors.

  *

  * licensed under the apache license, version 2.0 (the "license");

  * you may not use this file except in compliance with the license.

  * you may obtain a copy of the license at

  *

  *   http://HdhCmsTestapache.org/licenses/license-2.0

  *

  * unless required by applicable law or agreed to in writing, software

  * distributed under the license is distributed on an "as is" basis,

  * without warranties or conditions of any kind, either express or implied.

  * see the license for the specific language governing permissions and

  * limitations under the license.

  */

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.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;

/**

  * an implementation of {@link webmvcconfigurer} with empty methods allowing

  * subclasses to override only the methods they're interested in.

  *

  * @author rossen stoyanchev

  * @since 3.1

  */

public abstract class webmvcconfigureradapter implements webmvcconfigurer {

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void configurepathmatch(pathmatchconfigurer configurer) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void configurecontentnegotiation(contentnegotiationconfigurer configurer) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void configureasyncsupport(asyncsupportconfigurer configurer) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void configuredefaultservlethandling(defaultservlethandlerconfigurer configurer) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void addformatters(formatterregistry registry) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void addinterceptors(interceptorregistry registry) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void addresourcehandlers(resourcehandlerregistry registry) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void addcorsmappings(corsregistry registry) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void addviewcontrollers(viewcontrollerregistry registry) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void configureviewresolvers(viewresolverregistry registry) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void addargumentresolvers(list<handlermethodargumentresolver> argumentresolvers) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void addreturnvaluehandlers(list<handlermethodreturnvaluehandler> returnvaluehandlers) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void configuremessageconverters(list<httpmessageconverter<?>> converters) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void extendmessageconverters(list<httpmessageconverter<?>> converters) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void configurehandlerexceptionresolvers(list<handlerexceptionresolver> exceptionresolvers) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation is empty.

    */

   @override

   public void extendhandlerexceptionresolvers(list<handlerexceptionresolver> exceptionresolvers) {

   }

   /**

    * {@inheritdoc}

    * <p>this implementation returns {@code null}.

    */

   @override

   public validator getvalidator() {

     return null;

   }

   /**

    * {@inheritdoc}

    * <p>this implementation returns {@code null}.

    */

   @override

   public messagecodesresolver getmessagecodesresolver() {

     return null ;

   }

}

可以看出,该类 还能配置其他很多操作,例如异常处理,跨域请求等配置。

2、自动义web配置类

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import org.springframework.context.annotation.bean;

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 webmvcconfig extends webmvcconfigureradapter {

   @override

   public void addinterceptors(interceptorregistry registry) {

     registry.addinterceptor(getmyinterceptor()).addpathpatterns( "/**" );

   }

   @bean

   public myinterceptor getmyinterceptor(){

     return new myinterceptor();

   }

}

  如果需要添加多个拦截器,interceptorregistry registry.addinterceptor方法

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public interceptorregistration addinterceptor(handlerinterceptor interceptor) {

     interceptorregistration registration = new interceptorregistration(interceptor);

     this .registrations.add(registration);

     return registration;

   }

registrations是个数组结构,可以添加多个

3、自动义拦截器

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import javax.servlet.http.httpservletrequest;

import javax.servlet.http.httpservletresponse;

import javax.servlet.http.httpsession;

import org.slf4j.logger;

import org.slf4j.loggerfactory;

import org.springframework.web.method.handlermethod;

import org.springframework.web.servlet.handler.handlerinterceptoradapter;

public class myinterceptor extends handlerinterceptoradapter {

   final logger logger = loggerfactory.getlogger(getclass());

   @override

   public boolean prehandle(httpservletrequest request, httpservletresponse response, object handler) throws exception {

     //拦截操作

     return true ;

   }

}

总结

以上所述是小编给大家介绍的springboot添加自定义拦截器的实现代码,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对网站的支持!

原文链接:https://HdhCmsTestcnblogs测试数据/zwdx/archive/2018/09/19/9674497.html

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