DawnLight灬

当运行某个项目，或者某个Java类的时候工具报错如下： 错误原因：你当前项目下存在错误，执行的代码与这个错误没关系，因为你当前要运行的main方法与存在错误的文件在一个项目当中。但 MyEclipse（或Eclipse）依然会报错。 解决办法：将你要进行测试的类放到别的Project下进行。

java.sql.SQLException: Listener refused the connection with the following error:ORA-12505, TNS:listener does not currently know of SID given in connect descriptorThe Connection descriptor used by

解析xml文件时报错错误解释：io.UTFDataFormatException:无效的 byte 2 of 2-byte UTF-8序列。错误原因：xml文件编码格式问题   原编码格式为UTF-8，修改为gbk。好了

java.lang.IllegalArgumentException: Can't convert argument: null at org.apache.tomcat.util.IntrospectionUtils.convert(IntrospectionUtils.java:999) at org.apache.tomcat.util.digester.CallMethodRule

用Tomcat添加部署项目的时候报错：the selected server is enabled,but is not configured properly.Deployment to it will not be permitted until the problem is corrected.Please navigate to the server preference pages