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缺省语义文件导致润乾报表web应用启动报错

在布署的润乾web发布包启动时,总是报个 InputStream cannot be null 异常,但这个异常不影响报表的运行, 即便如此,每次启动时看着一堆stacktrace还是感觉很不舒服。

Stack Trace 详情:

[2010-11-23 15:25:25] runqianReportLogger : [DEBUG]  - : InputStream cannot be null
错误来源:InputStream cannot be null
: InputStream cannot be null
错误来源:InputStream cannot be null
 at com.runqian.report4.semantics.SemanticsManager.readXMLStream(Unknown Source:174)
 at com.runqian.report4.view.ReportServlet.loadConfig(Unknown Source:364)
 at com.runqian.report4.view.ReportServlet.loadConfig(Unknown Source:95)
 at com.runqian.report4.view.ReportServlet.init(Unknown Source:83)
 (...)
Caused by: java.lang.IllegalArgumentException: InputStream cannot be null
 at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:94)
 at com.runqian.report4.semantics.SemanticsManager.readXMLStream(Unknown Source:171)
 ... 30 more
DEBUG [main] (Unknown Source:22) - : InputStream cannot be null
错误来源:InputStream cannot be null
: InputStream cannot be null
错误来源:InputStream cannot be null
 at com.runqian.report4.semantics.SemanticsManager.readXMLStream(Unknown Source:174)
 at com.runqian.report4.view.ReportServlet.loadConfig(Unknown Source:364)
 at com.runqian.report4.view.ReportServlet.loadConfig(Unknown Source:95)
 at com.runqian.report4.view.ReportServlet.init(Unknown Source:83)
 (...)
Caused by: java.lang.IllegalArgumentException: InputStream cannot be null
 at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:94)
 at com.runqian.report4.semantics.SemanticsManager.readXMLStream(Unknown Source:171)
 ... 30 more

错误很明显,缺少语义层文件

错误来源:InputStream cannot be null
 at com.runqian.report4.semantics.SemanticsManager.readXMLStream(Unknown Source:174)

找到了错误,解决方法就很简单了,指定正确的语义层文件即可。

打开 WEB-INF 下面的 reportConfig.xml 查找以下XML片断:

在发布报表时,如果没有选择主义层文件,润乾会自动为你生成一个 /WEB-INF/demo.xml 的默认值, 而这个文件根本不存在,所以才会报 InputStream cannot be null 的异常。 如果应用中没有用到语义层文件, 重新设置正确的文件路径,如果没有用到,将此段代码注释或删除即可。

<config>
   <name>semanticsFile</name>
   <value>/WEB-INF/demo.xml</value>
</config>

重启应用,异常排除,控制台又干净了~