javax.el.PropertyNotFoundException: Property 'XXX' not found on type bean.XXXXX

遇到的问题：

在使用Eclipse开发Java Web时，调用DAO和Java Bean出现了如下错误：

严重: Servlet.service() for servlet [com.servlet.queryServlet] in context with path [/20180502] threw exception [javax.el.PropertyNotFoundException: Property 'Note' not found on type bean.employee] with root cause
javax.el.PropertyNotFoundException: Property 'Note' not found on type bean.employee
	at javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:269)
	at javax.el.BeanELResolver$BeanProperties.access$300(BeanELResolver.java:221)
	at javax.el.BeanELResolver.property(BeanELResolver.java:356)
	at javax.el.BeanELResolver.getValue(BeanELResolver.java:95)
	at org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:110)
	at org.apache.el.parser.AstValue.getValue(AstValue.java:169)
	at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184)
	at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:943)
	at org.apache.jsp.JSP.Index_jsp._jspService(Index_jsp.java:193)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:716)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:466)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:391)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:318)
	at com.servlet.queryServlet.doGet(queryServlet.java:43)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1132)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1539)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1495)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)

但是我的类中已经定义了geter和seter方法，如下：

而Jsp中的调用代码是通过EL实现，也导入了相应的包。如下：

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="f"%>







	
		

			
				<%
					int count = 0;
				%>
				
					

				

					
员工姓名：
					
添加 
				
				

					
序号
					
姓名
					
性别
					
手机号
					
职位
					
生日
					
备注
					
操作
				

						
<%=count++%>
						
${c.name }
						
${c.sex }
						
${c.mobile }
						
${c.jobTitle }
						
${c.birth }
						
${c.note }
						
删除
					
				
			
		
	

解决方案：(标红字体根据实际情况运用)

1.可能你遇到的错误是“Property 'xxx' not found on type java.lang.String”异常

它的意思是String类中没有xxx这个属性，而修改的方法就是：
list" var="c" >  
修改成：
${list}" var="c" >

但是你需要注意它的错误是： java.lang.String对比type bean.Employee，其中对应src/bean.Employee.java文件。而且我在JSP中已经是${list}这种变量了，所以该方法不是该错误的解决方案。

 

2.有人说是bean的属性名称错误，或者没有getter,setter方法，但是我的bean如下方法。

又参考错误“javax.el.PropertyNotFoundException: Property 'Note' not found on type com.manager.Paper”，此时的解决方案是：
 

private int pNum;
private int pSize;

建议你将这两个属性的名称改为小写：
 

private int pnum;
private int psize;

据说是因为命名规范，同时stu.EmpNo估计是大小写错了，换成 ${stu.empNo} 就能成功，因为EL是读取属性的getter方法的，一般按照属性首字母小写来处理。但是我的名字的字段是id，因此该方法对我的情况也是行不通的。

3.如果上面两个方法你仍然报错，下面是我自己总结的方法：

严重: Servlet.service() for servlet [com.servlet.queryServlet] in context with path [/20180502] threw exception [javax.el.PropertyNotFoundException: Property 'Note' not found on type bean.employee] with root cause

javax.el.PropertyNotFoundException: Property 'Note' not found on type bean.employee

你需要做到的是：

(1).首先确保循环${list}" var="c">，然后调用是${c.name }、${c.sex }、、、${c.Note }(这个是我之前写错的地方，对照上文代码)；
(2).然后属性命名最好是小写的，当然首字母一定要小写，如note；（很重要）
(3).在数据库中create table student( stuid int,username varchar(20) )对应的Student类变量private Int id; private String name;其中类型需要一致，同时设置getter和setter方法;

 

经过上面的调试，这个问题应该就已经搞定了。欢迎转载。