Spring + Apache Commons Configuration 사용

# Spring환경에서 Apache Configuration 사용하기

### Dependency 추가

```xml

<dependency>

<groupId>commons-configuration</groupId>

<artifactId>commons-configuration</artifactId>

<version>1.10</version>

</dependency>

<dependency>

<groupId>commons-collections</groupId>

<artifactId>commons-collections</artifactId>

<version>3.2.1</version>

</dependency>

<dependency>

<groupId>commons-lang</groupId>

<artifactId>commons-lang</artifactId>

<version>2.6</version>

</dependency>

<dependency>

<groupId>org.springmodules</groupId>

<artifactId>spring-modules-jakarta-commons</artifactId>

<version>0.8</version>

<exclusions>

<exclusion>

<artifactId>jstl</artifactId>

<groupId>javax.servlet</groupId>

</exclusion>

<exclusion>

<groupId>javax.servlet</groupId>

<artifactId>servlet-api</artifactId>

</exclusion>                

</exclusions>

</dependency>  

```

### 스프링 Bean으로 등록

```xml

<!-- XML로 설정된 설정파일들을 SET해준다. -->

<beans:bean id="configuration" class="org.apache.commons.configuration.CompositeConfiguration">

<beans:constructor-arg>

    <beans:list>

        <beans:bean class="org.apache.commons.configuration.XMLConfiguration">

            <beans:constructor-arg type="java.lang.String" value="config/config-customize.xml" />

          </beans:bean>

          <beans:bean class="org.apache.commons.configuration.XMLConfiguration">

              <beans:constructor-arg type="java.lang.String" value="config/config-default.xml" />

          </beans:bean>

          <beans:bean class="org.apache.commons.configuration.XMLConfiguration">

              <beans:constructor-arg type="java.lang.String" value="config/config-jdbc.xml" />

          </beans:bean>

      </beans:list>

  </beans:constructor-arg>

</beans:bean>

<!-- 다른 설정에서 사용할 수 있도록 Placeholder로 등록한다. -->

<beans:bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

  <beans:property name="properties">

    <beans:bean class="org.springmodules.commons.configuration.CommonsConfigurationFactoryBean">

        <beans:property name="configurations">

            <beans:list>

                   <beans:ref bean="configuration"/>

              </beans:list>

          </beans:property>

      </beans:bean>

  </beans:property>

</beans:bean>