인프런 커뮤니티 질문&답변

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:aop="http://www.springframework.org/schema/aop"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:security="http://www.springframework.org/schema/security"

    xmlns:tx="http://www.springframework.org/schema/tx"

    xsi:schemaLocation="

        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd

        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd

        http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.0.xsd

        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

이렇게 수정해서 빌드해보세요