Jetty7启动的一些问题： 下载了各distribution后， 把自己的war拷贝到webapp下，然后 运行java -jar start.jar -OPTIONS=Server,default  etc/jetty.xml 提示有错误： 无法初始化com.acme.SessionDump 在官网上找了说这个类是假设session中所有的值类型是string类型， 于是把jetty默认提供的contexts\test.d\override-web.xml中的给删掉就可以运行。

<?xml version="1.0" encoding="ISO-8859-1"?>
<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_2_5.xsd" 
   version="2.5"> 


<!-- This web.xml format file is an override file that is applied to the test webapp AFTER
     it has been configured by the default descriptor and the WEB-INF/web.xml descriptor -->

  <!-- Add or override context init parameter -->
  <context-param>
    <param-name>context-override-example</param-name>
    <param-value>a context value</param-value>
  </context-param>

  <!-- Add or override servlet init parameter -->
  <servlet>
    <servlet-name>Dump</servlet-name>
    <init-param>
      <param-name>servlet-override-example</param-name>
      <param-value>a servlet value</param-value>
    </init-param>
  </servlet>

  <!-- Add servlet mapping -->
  <servlet-mapping>
    <servlet-name>Dump</servlet-name>
    <url-pattern>*.more</url-pattern>
  </servlet-mapping>

  <!-- Reset servlet class and/or start order -->
  <!--servlet>
    <servlet-name>Session</servlet-name>
    <servlet-class>com.acme.SessionDump</servlet-class>
    <load-on-startup>5</load-on-startup>
  </servlet-->
  
</web-app>