放在Root/WEB-INF/classes目录下,web.xml当然要设置了.其实就只要设置web.xml,而且tocmat5每个servlet class都要声明.  <servlet>
    <servlet-name>testservlet</servlet-name>
    <servlet-class>yourpackage.testservlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>testservlet</servlet-name>
    <url-pattern>/servlet/testservlet</url-pattern>
  </servlet-mapping>