Exception starting filter jfinal;Can not create instance of class: com.clschina.csgl.config.CsglConfig

Question

@JFinal 你好，想跟你请教个问题：今天启动Tomcat报错（昨天没问题，代码未修改）

严重: Exception starting filter jfinal
java.lang.RuntimeException: Can not create instance of class: com.clschina.csgl.config.CsglConfig
at com.jfinal.core.JFinalFilter.createJFinalConfig(JFinalFilter.java:98)
at com.jfinal.core.JFinalFilter.init(JFinalFilter.java:47)
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4573)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5188)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.clschina.csgl.config.CsglConfig
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.jfinal.core.JFinalFilter.createJFinalConfig(JFinalFilter.java:96)
... 13 more

Answer 1

停掉Tomcat,clean一下项目再重启

Answer 2

以上三项均没有问题。后来把原Tomcat删除掉，重新配置新的就没有以上问题了。

Answer 3

    是否在 web.xml 中配置了：<configClass>
com.clschina.csgl.config.CsglConfig</configClass>，另外检查一下 CsglConfig 是否继承了 JFinalConfig 类，最后，检查一下 Default output directory 是否填写的：项目名称/WebRoot/WEB-INF/classes