MVC留言板 JSP页面不含JAVA代码 实现MVC模式

<?xml version="1.0" encoding="UTF-8"?> <web-app 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"> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>Hello</servlet-name> <servlet-class>com.Hello</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>indexservlet</servlet-name> <servlet-class>com.indexservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>messageservlet</servlet-name> <servlet-class>com.messageservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>loginservlet</servlet-name> <servlet-class>com.loginservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>adminservlet</servlet-name> <servlet-class>com.adminservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>deleteservlet</servlet-name> <servlet-class>com.deleteservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>writeservlet</servlet-name> <servlet-class>com.writeservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>Registerservlet</servlet-name> <servlet-class>com.Registerservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>Selectidservlet</servlet-name> <servlet-class>com.Selectidservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>Selectsubjectservlet</servlet-name> <servlet-class>com.Selectsubjectservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>Selectuserservlet</servlet-name> <servlet-class>com.Selectuserservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>Selectmessageservlet</servlet-name> <servlet-class>com.Selectmessageservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>Replayservlet</servlet-name> <servlet-class>com.Replayservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>Updateservlet</servlet-name> <servlet-class>com.Updateservlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>Writereplayservlet</servlet-name> <servlet-class>com.Writereplayservlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>Hello</servlet-name> <url-pattern>/servlet/Hello</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>indexservlet</servlet-name> <url-pattern>/servlet/indexservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>messageservlet</servlet-name> <url-pattern>/servlet/messageservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>loginservlet</servlet-name> <url-pattern>/servlet/loginservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>adminservlet</servlet-name> <url-pattern>/servlet/adminservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>deleteservlet</servlet-name> <url-pattern>/servlet/deleteservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>writeservlet</servlet-name> <url-pattern>/servlet/writeservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Registerservlet</servlet-name> <url-pattern>/servlet/Registerservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Selectidservlet</servlet-name> <url-pattern>/servlet/Selectidservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Selectsubjectservlet</servlet-name> <url-pattern>/servlet/Selectsubjectservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Selectuserservlet</servlet-name> <url-pattern>/servlet/Selectuserservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Selectmessageservlet</servlet-name> <url-pattern>/servlet/Selectmessageservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Replayservlet</servlet-name> <url-pattern>/servlet/Replayservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Updateservlet</servlet-name> <url-pattern>/servlet/Updateservlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Writereplayservlet</servlet-name> <url-pattern>/servlet/Writereplayservlet</url-pattern> </servlet-mapping> </web-app>