我有代码：
public void setOrderDate(Date ordertDate) {
this.orderDate = orderDate;
}
很明显，但Eclipse会发出警告＆＃34;对变量orderdate的赋值没有效果＆＃34;。为什么是这样？对于其他数据类型的其他私有变量，我有类似的setter / getters但是没有警告吗？并且这个受让人真的不起作用。
我不确定这是否已经成功但我不时也会得到例外：
java.lang.IllegalStateException
at com.sun.faces.context.FacesContextImpl.assertNotReleased(Unknown Source)
at com.sun.faces.context.FacesContextImpl.getAttributes(Unknown Source)
at org.richfaces.context.ExtendedPartialViewContext.setInstance(ExtendedPartialViewContext.java:55)
at org.richfaces.context.ExtendedPartialViewContext.release(ExtendedPartialViewContext.java:64)
at org.richfaces.context.ExtendedPartialViewContextImpl.release(ExtendedPartialViewContextImpl.java:424)
at com.sun.faces.context.FacesContextImpl.release(Unknown Source)
at org.primefaces.context.PrimeFacesContext.release(PrimeFacesContext.java:28)
at javax.faces.webapp.FacesServlet.service(Unknown Source)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.nmc.nxapps.web.filters.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:33)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:146)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:279)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)