Error configuring application listener of class

时间 2019-11-06

标签 error configuring application listener class 繁體版

原文原文链接

SEVERE: Error configuring application listener of class com.bonc.hq.listener.ServletUploadListenerjava

java.lang.InstantiationException: com.bonc.hq.listener.ServletUploadListenerapache

at java.lang.Class.newInstance0(Class.java:359)tomcat

at java.lang.Class.newInstance(Class.java:327)app

at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:140)函数

at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4888)spa

at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)ssl

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)servlet

at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)it

at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)io

at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)

at java.util.concurrent.FutureTask.run(FutureTask.java:166)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

at java.lang.Thread.run(Thread.java:722)

今天写上传文件的servlet，使用了progresslistener，写完重启tomcat 报上面的错误，查了很久才查出缘由：

我写的listener中只有一个带参数的构造函数，没写默认的构造函数，tomcat容器实例化这个listener的时候就报错了

加一个默认构造函数就ok了