[spring] utf-8 설정

1. web.xml 에 작성

<!-- utf8 설정 -->
<filter>
	<filter-name>encodingFilter</filter-name>
	<filter-class>
		org.springframework.web.filter.CharacterEncodingFilter
	</filter-class>
	<init-param>
		<param-name>encoding</param-name>
		<param-value>UTF-8</param-value>
	</init-param>
</filter>
<filter-mapping>
	<filter-name>encodingFilter</filter-name>
	<url-pattern>/*</url-pattern>
</filter-mapping>