错误代码

java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at top.qaqaq.web.BaseServlet.doPost(BaseServlet.java:43)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:731)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:814)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:223)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:158)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:185)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:158)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:119)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:400)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1739)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/collections/FastHashMap
	at org.apache.commons.beanutils.PropertyUtilsBean.getPropertyDescriptor(PropertyUtilsBean.java:964)
	at org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:935)
	at org.apache.commons.beanutils.BeanUtilsBean.populate(BeanUtilsBean.java:823)
	at org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:431)
	at top.qaqaq.web.UserServlet.regist(UserServlet.java:67)
	... 29 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections.FastHashMap
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1437)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1245)
	... 34 more

错误原因

BeanUtils – Project Dependencies (apache.org)

如官网所述，编译BeanUtils时需要使用commons-collections3.2.2和commons-logging1.2

注意

Collections – Download Apache Commons Collections

Collections最新版本为4.4，但我们必须使用3.2.2版本，不然依然会报错

结果

依赖导入后测试正常

[2022-12-10 01:16:22,634] Artifact JavaWeb_Code_Book:war exploded: Artifact is deployed successfully
[2022-12-10 01:16:22,634] Artifact JavaWeb_Code_Book:war exploded: Deploy took 1,308 milliseconds
注入之前：User{id=null, username='null', password='null', email='null'}
注入之后：User{id=null, username='admin', password='123456', email='123@qq.com'}