我的环境，jdk1.8.0.202，jfinal3.5.

使用代码：

String pk = object.getPk();
String pkValue = record.get(pk).toString();
   // 删除数据
Db.use(object.getDs()).delete(object.getTable(), pk, record);

到这一行就报错了：

java.lang.ClassCastException: java.lang.String cannot be cast to [Ljava.lang.Object;
	at com.jfinal.plugin.activerecord.DbPro.delete(DbPro.java:461)
	at com.eova.widget.grid.GridController$2.run(GridController.java:282)
	at com.jfinal.plugin.activerecord.DbPro.tx(DbPro.java:770)
	at com.jfinal.plugin.activerecord.DbPro.tx(DbPro.java:807)
	at com.eova.widget.grid.GridController.deleteOrHide(GridController.java:260)
	at com.eova.widget.grid.GridController.delete(GridController.java:236)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:75)
	at com.eova.interceptor.AuthInterceptor.intercept(AuthInterceptor.java:71)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:69)
	at com.eova.interceptor.LoginInterceptor.intercept(LoginInterceptor.java:81)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:69)
	at com.jfinal.core.ActionHandler.handle(ActionHandler.java:81)
	at com.jfinal.ext.handler.UrlSkipHandler.handle(UrlSkipHandler.java:46)
	at com.jfinal.ext.handler.UrlSkipHandler.handle(UrlSkipHandler.java:46)
	at com.jfinal.plugin.druid.DruidStatViewHandler.handle(DruidStatViewHandler.java:81)
	at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:86)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2522)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2511)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)

请教一下原因。

另外，这些代码之前是在jdk1.7环境下使用的，一直没有问题，最近把jdk升级到1.8之后才出现的上述问题。