tomcat jsp 异常

Question

cp=H:\Program Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\common\lib\commons-digester.jar 
    cp=H:\Program Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\common\lib\commons-fileupload.jar 
    cp=H:\Program Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\common\lib\struts.jar 
    cp=H:\Program Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\common\lib\commons-validator.jar 
    cp=H:\Program Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\common\lib\standard.jar 
    cp=H:\Program Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\common\lib\jstl.jar 
    cp=H:\Program Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\common\lib\tools.jar 
    cp=H:\Program%20Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\bin\bootstrap.jar 
    cp=C:\Program%20Files\Java\jdk1.5.0_06\lib\tools.jar 
    cp=C:\Program%20Files\Java\jdk1.5.0_06\jre\lib\ext\dnsns.jar 
    cp=C:\Program%20Files\Java\jdk1.5.0_06\jre\lib\ext\localedata.jar 
    cp=C:\Program%20Files\Java\jdk1.5.0_06\jre\lib\ext\sunjce_provider.jar 
    cp=C:\Program%20Files\Java\jdk1.5.0_06\jre\lib\ext\sunpkcs11.jar 
2009-1-6 15:23:36 org.apache.catalina.core.ApplicationDispatcher invoke 
严重: Servletjsp的Servlet.service()发生意外(exception) 
org.apache.jasper.JasperException: Unable to compile class for JSP An error occurred at line: 119 in the jsp file: /pages/basedata/etmgr.jsp 
Generated servlet error: 
H:\Program Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\work\Catalina\localhost\WebRoot\org\apache\jsp\pages\basedata\etmgr_jsp.java:253: 软件包 com.mapstudio.entity.dao.et 不存在 
                    com.mapstudio.entity.dao.et.MarketVO Market = null; 
                                                  ^ 
An error occurred at line: 119 in the jsp file: /pages/basedata/etmgr.jsp 
Generated servlet error: 
H:\Program Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\work\Catalina\localhost\WebRoot\org\apache\jsp\pages\basedata\etmgr_jsp.java:259: 软�� com.mapstudio.entity.dao.et 不存在 
                    Market = (com.mapstudio.entity.dao.et.MarketVO) _jspx_page_context.findAttribute("Market"); 
                                                            ^ 
Generated servlet error: 
H:\Program Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\work\Catalina\localhost\WebRoot\org\apache\jsp\pages\basedata\etmgr_jsp.java:356: 软件包 com.mapstudio.entity.dao.et 不存在 
                      Market = (com.mapstudio.entity.dao.et.MarketVO) _jspx_page_context.findAttribute("Market"); 
                                                              ^ 
注意： H:\Program Files\jaxmao-tomcat-5.5.20\apache-tomcat-5.5.20\work\Catalina\localhost\WebRoot\org\apache\jsp\pages\basedata\etmgr_jsp.java 使用了未经检查或不安全的操作。 
注意： 要了解详细信息，请使用 -Xlint:unchecked 重新编译。 
3 错误 
请问这是什么错误？ 我的开发工具是myeclispse 5.1 jdk1.5 tomcat 5.5