UC知道JSP&Servlet错误
来源：百度知道 编辑：UC知道 时间：2024/05/26 14:25:59
HTTP Status 500 -
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type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 40 in the jsp file: /index.jsp
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\WebRoot\org\apache\jsp\index_jsp.java:151: cannot access sky.dao.NewsDao
An error occurred at line: 40 in the jsp file: /index.jsp
Generated servlet error:
bad class file: C:\Program Files\Apache Software Foundation\Tomcat 5.0\webapps\WebRoot\WEB-INF\classes\sky\dao\NewsDao.class
class file has wrong version 49.0, should be 48
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type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 40 in the jsp file: /index.jsp
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\WebRoot\org\apache\jsp\index_jsp.java:151: cannot access sky.dao.NewsDao
An error occurred at line: 40 in the jsp file: /index.jsp
Generated servlet error:
bad class file: C:\Program Files\Apache Software Foundation\Tomcat 5.0\webapps\WebRoot\WEB-INF\classes\sky\dao\NewsDao.class
class file has wrong version 49.0, should be 48
class file has wrong version 49.0, should be 48.0
这句话就很明显了
问题出在你的
class文件是在高版本的JAVA环境中编译的，而你发布的环境JAVA版本比编译的版本低。环境不一致导致的。。。
NewsDao newsDao = new NewsDao()
1 NewsDao类导进jsp了没
2 在tomcat部署时编译了没
3 实在不行把tomcat webapp的你的项目先删了重新部署下
将TOmcat目录下的work目录删除就可以了.