tomcat5.5.2.7 启动报错

2011-5-9 9:12:36 org.apache.tomcat.util.digester.Digester startElement
严重: Begin event threw error
java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
at java.lang.Class.privateGetPublicMethods(Class.java:2547)
at java.lang.Class.getMethods(Class.java:1410)
at org.apache.tomcat.util.IntrospectionUtils.findMethods(IntrospectionUtils.java:812)
at org.apache.tomcat.util.IntrospectionUtils.setProperty(IntrospectionUtils.java:268)
at org.apache.catalina.startup.SetAllPropertiesRule.begin(SetAllPropertiesRule.java:59)
at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1276)
。。。。。。。。。。。。
。。。。。。。。。。。。
等等。。

原因是tomcat5.5.2.7 没有servlet.jar或servlet-api.jar包
把这两个jar包放到
tomcat-5.5.27\common\lib
即可