已觀察到,每當我添加一個Listener
類我web.xml
,整個Web應用程序停止運行。請看以下代碼:的ServletContextListener問題| HTTP狀態404 -
的web.xml
<listener>
<listener-class>Reminder</listener-class>
</listener>
Reminder.java
@Override
public void contextInitialized(ServletContextEvent sce) {
try {
response.getWriter().print("Initasdadsa");
} catch (IOException ex) {
Logger.getLogger(Reminder.class.getName()).log(Level.SEVERE, null, ex);
}
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
Enumeration<Driver> drivers = DriverManager.getDrivers();
while (drivers.hasMoreElements()) {
Driver driver = drivers.nextElement();
try {
DriverManager.deregisterDriver(driver);
} catch (SQLException e) {
}
}
}
當我部署上述應用程序的.war文件,它說:
HTTP Status 404 - type Status report
message description The requested resource is not available.Apache Tomcat/6.0.24
Tomcat的日誌文件如下:
May 9, 2013 3:57:10 PM org.apache.catalina.startup.HostConfig checkResources
INFO: Undeploying context [/CloudStorage]
May 9, 2013 3:57:10 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: A web application registered the JBDC driver [com.mysql.jdbc.Driver] but failed
to unregister it when the web application was stopped. To prevent a memory leak, the
JDBC Driver has been forcibly unregistered.
May 9, 2013 3:57:50 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive CloudStorage.war
May 9, 2013 3:57:50 PM org.apache.catalina.core.StandardContext start
SEVERE: Error listenerStart
May 9, 2013 3:57:50 PM org.apache.catalina.core.StandardContext start
SEVERE: Context [/CloudStorage] startup failed due to previous errors
May 9, 2013 3:57:50 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: A web application registered the JBDC driver [com.mysql.jdbc.Driver] but failed
to unregister it when the web application was stopped. To prevent a memory leak, the
JDBC Driver has been forcibly unregistered.
當我省略了Listener
一部分,該應用程序工作正常。 :-(
我在做什麼錯?
請張貼整個Reminder.class,爲您發佈犯規編譯現在 – 2013-05-09 12:31:12