[Spring] web.xml 서블릿 버전 DTD 정리

web.xml을 설정할 때에 각자 사용하는 서블릿 버전이 다를 것이라고 생각합니다.

물론 서블릿 3.0 버전 이후로 Annotation이 사용가능해지면서 3.0 이상의 버전을 선호한다고 많이 듣긴 했지만 

그래도 이번을 기회삼아 전체 서블릿 버전 DTD 를 정리해보고자 합니다.

서블릿 2.2 (Servlet 2.2)

 <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app/>

서블릿 2.3 (Servlet 2.3)

 <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app/>

서블릿 2.4 (Servlet 2.2)

DTD에서 스키마로 바뀌었습니다.

 <?xml version="1.0" encoding="UTF-8"?>
<web-app id="servlet-2_4" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
</web-app>

서블릿 2.5 (Servlet 2.5)

 <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="servlet-2_5" version="2.5">
</web-app>

서블릿 3.0 (Servlet 3.0)

 <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
</web-app>

서블릿 3.1 (Servlet 3.1)

 <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
	version="3.1">
</web-app>