关于Ubuntu上tomcat出现的错误小结

                最近在ubuntu上部署了一个网站，用的是tomcat但是老部署不成功，提示如下错误：
                Jun 10, 2009 5:42:47 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.util.Log4jConfigListener
java.security.AccessControlException: access denied (java.util.PropertyPermission webapp.root read)
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:342)
        at java.security.AccessController.checkPermission(AccessController.java:553)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
        at java.lang.SecurityManager.checkPropertyAccess(SecurityManager.java:1302)
        at java.lang.System.getProperty(System.java:669)
        at org.springframework.web.util.WebUtils.setWebAppRootSystemProperty(WebUtils.java:130)
        at org.springframework.web.util.Log4jWebConfigurer.initLogging(Log4jWebConfigurer.java:117)
        at org.springframework.web.util.Log4jConfigListener.contextInitialized(Log4jConfigListener.java:51)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3843)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at org.apache.catalina.core.ContainerBase.access$000(ContainerBase.java:123)
        at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:145)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:769)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:926)
        at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:889)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
        at org.apache.catalina.core.StandardService.start(StandardService.java:516)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.apache.commons.daemon.support.DaemonLoader.start(DaemonLoader.java:177)
Jun 10, 2009 5:42:48 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
java.lang.ExceptionInInitializerError
        at org.springframework.web.context.ContextLoader.<init>(ContextLoader.java:139)
        at org.springframework.web.context.ContextLoaderListener.createContextLoader(ContextLoaderListener.java:57)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:48)
"localhost.2009-06-10.log" 133L, 10359C     
                后来在前辈指导下解决了这个问题，有2种可能：
               1、ubuntu自带的JDK问题，请重新安装SUN的JDK #sudo apt-get install sun-java6-jre sun-java6-jdk sun-java6-demo sun-java6-doc sun-java6-source sun-java6-plugin sun-java6-fonts  libmyodbc tdsodbc
                相关设置如下
                sudo gedit /etc/profile //这个配制文件就是一个纯文本的东西，用什么工具自己选择vi、vim、gvim、emacs什么的都可以，只要是你机器里有的文本编辑工具就可以 
                JAVA_HOME=/usr/lib/jvm/java-6-sun 
                CLASSPATH=.:/usr/lib/jvm/java-6-sun/lib 
                JRE_HOME=/usr/lib/jvm/java-6-sun/jre 
                export JRE_HOME 
                export CLASSPATH 
                export JAVA_HOME

                sudo gedit /etc/environment 
                JAVA_HOME=/usr/lib/jvm/java-6-sun 
                CLASSPATH=.:/usr/lib/jvm/java-6-sun/lib 
                提示：如果要让它立刻生效可以在终端里输入： . /etc/environment 
                一般情况可以不做设置，因为在这些安装完成后，机器必须得重启下，所没必要设置，但如果只是设置一下 
                环境变量就要用它的话，就可以采用这种方法。

                sudo gedit /etc/jvm 
                在文件顶部添加 
                /usr/lib/jvm/java-6-sun 
                提示：这一步是在设置JDK的优先级

                sudo gedit ~/.bashrc 
                在文件的末尾，添加如下两行 
                export JAVA_HOME=/usr/lib/jvm/java-6-sun 
                export PATH=$PATH:$JAVA_HOME/bin 
                提示：这是在设置用户变量

                如果您的机器里装着多个JDK用下面的方法来选择JDK版本（8.04默认是没有安装JDK的，上面的安装只安装了一个版本的JDK，可以不设置） 
                sudo update-alternatives --config java

                更新当前系统的JDK版本 
                sudo update-java-alternatives -s java-6-sun 
                然后编辑 #sudo vim /etc/init.d/tomcat6
                中找到JDK_DIRS的配置，将其替换为：JDK_DIRS="/usr/lib/jvm/java-6-sun /usr/lib/jvm/java-1.5.0-sun /usr/lib/j2sdk1.5-sun /usr/lib/j2sdk1.5-ibm"
                然后重新启动tomcat  OK解决了！
                2、TOMCAT的安全模式打开了
                直接编辑#sudo vim /etc/init.d/tomcat6
                找到TOMCAT6_SECURITY=Yes   改为no就OK了，重新启动就能运行了