示例

下面的例子说明了部署描述文件模式中列出的定义的用法。

一个简单的例子

CODE EXAMPLE 14-1 Basic Deployment Descriptor Example

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app 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_5.xsd”
version=”2.5”>
    <display-name>A Simple Application</display-name>
    <context-param>
        <param-name>Webmaster</param-name>
        <param-value>webmaster@mycorp.com</param-value>
    </context-param>
    <servlet>
        <servlet-name>catalog</servlet-name>
        <servlet-class>com.mycorp.CatalogServlet
        </servlet-class>
        <init-param>
            <param-name>catalog</param-name>
            <param-value>Spring</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>catalog</servlet-name>
        <url-pattern>/catalog/*</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>30</session-timeout>
    </session-config>
    <mime-mapping>
        <extension>pdf</extension>
        <mime-type>application/pdf</mime-type>
    </mime-mapping>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
    </welcome-file-list>
    <error-page>
        <error-code>404</error-code>
        <location>/404.html</location>
    </error-page>
</web-app>

安全的例子

CODE EXAMPLE 14-2 Deployment Descriptor Example Using Security

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app 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_5.xsd"
version=”2.5”>
    <display-name>A Secure Application</display-name>
    <servlet>
        <servlet-name>catalog</servlet-name>
        <servlet-class>com.mycorp.CatalogServlet
        </servlet-class>
    <init-param>
        <param-name>catalog</param-name>
        <param-value>Spring</param-value>
    </init-param>
    <security-role-ref>
    <role-name>MGR</role-name>
    <!-- role name used in code -->
    <role-link>manager</role-link>
    </security-role-ref>
    </servlet>
    <security-role>
    <role-name>manager</role-name>
    </security-role>
    <servlet-mapping>
    <servlet-name>catalog</servlet-name>
    <url-pattern>/catalog/*</url-pattern>
    </servlet-mapping>
    <security-constraint>
    <web-resource-collection>
        <web-resource-name>SalesInfo
        </web-resource-name>
        <url-pattern>/salesinfo/*</url-pattern>
        <http-method>GET</http-method>
        <http-method>POST</http-method>
    </web-resource-collection>
    <auth-constraint>
        <role-name>manager</role-name>
    </auth-constraint>
    <user-data-constraint>
        <transport-guarantee>CONFIDENTIAL
        </transport-guarantee>
    </user-data-constraint>
    </security-constraint>
</web-app>