|
TOP
|
| 我在配置开发环境(JDK1.5+Tomcat服务器5.5.4+Eclipse3.1)时碰到的3个问 |
| [ 录入者:admin | 时间:2007-12-20 09:01:13
| 作者: | 来源:原创
| 浏览:20次 ] |
java开源文档大全致力于打造中国最大最全的开源文档,它提供了最全面最权威的开源资料,同时为大家提供一个交流的平台,如果您有好的想法,欢迎您投稿.
1、问题：用打开带Java小程序的页面，在Java小程序的地方显示一灰色区块，
当鼠标移动到该区块时，状态栏提示：
load:class XXXXX not found
解答：参考http://www.cryer.co.uk/brian/java/help_classnotfound.htm
2、问题：在Eclipse中执行，报Could not find the main class.Program will exit.
console窗口：
java.lang.ExceptionInInitializerError
Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException) (Caused by org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException))
at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
at org.apache.catalina.startup.Bootstrap.<clinit>(Bootstrap.java:53)
Caused by: org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException)
at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:397)
at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
... 4 more
Caused by: java.lang.NullPointerException
at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:374)
... 5 more
Exception in thread "main"
解答：
Possible solution:
I edited the file "tomcat服务器50x.server" under
C:\eclipse\plugins\com.objectlearn.jdt.j2ee_3.0.1\servers
and changed
-Djava.endorsed.dirs="${serverRootDirectory}/bin;${serverRootDirectory}/common/endorsed"
to
-Djava.endorsed.dirs="${serverRootDirectory}/common/endorsed"
in the following ´tags´:
<startVmParameters>-DJAVA_HOME="${jrePath}" -Dcatalina.base="${serverRootDirectory}" -Dcatalina.home="${serverRootDirectory}" -Djava.io.tmpdir="${serverRootDirectory}/temp" -Djava.endorsed.dirs="${serverRootDirectory}/bin;${serverRootDirectory}/common/endorsed"</startVmParameters>
and
<stopVmParameters>-DJAVA_HOME="${jrePath}" -Dcatalina.base="${serverRootDirectory}" -Dcatalina.home="${serverRootDirectory}" -Djava.io.tmpdir="${serverRootDirectory}/temp" -Djava.endorsed.dirs="${serverRootDirectory}/bin;${serverRootDirectory}/common/endorsed"</stopVmParameters>
This matches the value used in my catalina.bat file when lauched from the command prompt.
3、问题：修改.java ,重新编译生成.class后，IE刷新，但Applet的内容还是旧的。
解答：刷新时按住CTRL键试试。
|
java开源文档研究struts,webwork,spring,tomcat,jboss,lucense,nutch,JUnit,eclipse......,如果您有什么意见,欢迎评论和留言.
|
|
|
|
|
