JavaBean 定义里只有一个字母小写开头的property

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最新推荐文章于 2024-10-05 07:00:00 发布

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分类专栏： JPA 文章标签： servlet jsp 数据库

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JavaBean 定义里这种开头只有一个字母小写的property处理跟一般的Property处理不一样容易报错：

May 1, 2012 1:45:51 PM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
javax.el.PropertyNotFoundException: Property 'uCreateTime' not found on type ivas.model.user.TdAdviceInfo
	at javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:214)
	at javax.el.BeanELResolver$BeanProperties.access$400(BeanELResolver.java:191)
	at javax.el.BeanELResolver.property(BeanELResolver.java:300)
	at javax.el.BeanELResolver.getValue(BeanELResolver.java:81)
	at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:54)
	at org.apache.el.parser.AstValue.getValue(AstValue.java:123)
	at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
	at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:938)
	at org.apache.jsp.user.message_005fmanage.querymessage_jsp._jspService(querymessage_jsp.java:184)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
	at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063)
	at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at ivas.web.filter.user.UserFilter.doFilter(UserFilter.java:30)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at ivas.web.filter.encoding.EncodingFilter.doFilter(EncodingFilter.java:26)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:662)

尽量少用这种只有一个小写开头的属性

JavaBean 定义里开头只有一个字母小写的Property，处理方式跟一般的Property处理方式不一样，不注意的话会出现：找不到属性这种难以理解的错误。解决方法有三：1.修改数据库字段2.改get方法3.修改展现层中调用的Property（如uCreateTime改为UCreateTime，下策）。