不同版本（2.3-3.1）web.xml文件的schema頭部聲明

1. Servlet 3.1

Java EE 7 XML schema，命名空間是 http://xmlns.jcp.org/xml/ns/javaee/

 

1. <?xml version="1.0" encoding="UTF-8"?>

2. <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"

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

4. xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee

5. http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"

6. version="3.1">

7.  

8. </web-app>

2. Servlet 3.0

 

Java EE 6 XML schema，命名空間是 http://java.sun.com/xml/ns/javaee

 

1. <?xml version="1.0" encoding="UTF-8"?>

2. <web-app xmlns="http://java.sun.com/xml/ns/javaee"

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

4. xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

5. http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"

6. version="3.0">

7.  

8. </web-app>

3. Servlet 2.5

 

Java EE 5 XML schema，命名空間是 http://java.sun.com/xml/ns/javaee

 

1. <?xml version="1.0" encoding="UTF-8"?>

2. <web-app xmlns="http://java.sun.com/xml/ns/javaee"

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

4. xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

5. http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

6. version="2.5">

7.  

8. </web-app>

 

 

4. Servlet 2.4

Java EE 1.4 XML schema, 命名空間是 http://java.sun.com/xml/ns/j2ee

 

1. <?xml version="1.0" encoding="UTF-8"?>

2. <web-app xmlns="http://java.sun.com/xml/ns/j2ee"

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

4. xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

5. http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"

6. version="2.4">

7.  

8. </web-app>

5. Servlet 2.3

 

Java EE 1.3 DTDs schema，這個版本的web.xml文件太老了，強烈建議升級

 

1. <!DOCTYPE web-app PUBLIC

2. "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

3. "http://java.sun.com/dtd/web-app_2_3.dtd" >

4.  

5. <web-app>

6. <display-name>Servlet 2.3 Web Application</display-name>

7. </web-app>