tomcat中UnsupportedClassVersionError问题

妖怪幻

说来惭愧，长期做后台开发很少接触到tomcat，因为用axis2需要它装载居然给我出了个jdk版本的错误，我用的是tomcat5.5+兼容包，运行在jdk1.4.2。对tomcat还是很信任的，开始怀疑是axis2的问题，但又明明提示是jsp的错误，最终查明是tomcat编译jsp缓存的原因，曾经在jdk6上运行过tomcat，导致编译的jsp一直保留下来，删掉tomcat\work\Catalina\localhost\axis2问题解决。
java.lang.UnsupportedClassVersionError: org/apache/jsp/axis2_002dweb/index_jsp (Unsupported major.minor version 49.0)
java.lang.ClassLoader.defineClass0(Native Method)
java.lang.ClassLoader.defineClass(ClassLoader.java:537)
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
java.net.URLClassLoader.access$100(URLClassLoader.java:55)
java.net.URLClassLoader$1.run(URLClassLoader.java:194)
java.security.AccessController.doPrivileged(Native Method)
java.net.URLClassLoader.findClass(URLClassLoader.java:187)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:131)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:63)
org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:597)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:137)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:314)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)