Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www

时间点：2017.12.01

问题：maven工程启动时报Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/mvc]错误，一直无法解决。

module-context.xml文件内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> 
<context:component-scan base-package="com.sitech.cmap" />
<!-- <aop:aspectj-autoproxy proxy-target-class="false" /> -->
<!-- 处理responseBody 里面日期类型 //在日期类型的get方法上添加 @JsonFormat(pattern="yyyy年MM月dd日
HH:mm:ss") 覆盖默认格式 -->
<mvc:annotation-driven>
<mvc:message-converters>
<bean
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="objectMapper">
<bean class="com.fasterxml.jackson.databind.ObjectMapper">
<property name="dateFormat">
<bean class="java.text.SimpleDateFormat">
<constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss" />
</bean>
</property>
</bean>
</property>
</bean>
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/plain; charset=UTF-8</value>
</list>
</property>
</bean>
<bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter"/>
</mvc:message-converters>
</mvc:annotation-driven>

<!-- 支持上传文件 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>
</beans>

思路：1、刚开始以为是http://www.springframework.org/schema/mvc无法访问，但其实可以访问。

2、认为是缺少spring-mvc的jar包。在pom.xml中添加依赖，引用jar包，解决。

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>

参考：https://www.cnblogs.com/icewee/articles/3703491.html