'javax.el.PropertyNotFoundException: Property 'foo' not found on type com.example.Bean
I have results from
Query query = session.createQuery("From Pool as p left join fetch p.poolQuestion as s");
query and I would like to display it on JSP.
I have loop:
<c:forEach items="${pools}" var="pool">
<p>${pool.name}</p>
</c:forEach>
and I would like to display results from poolQuestion table (which is Join table). The value that i want to display is 'answer'.
How can I do it?
<c:forEach items="${pools}" var="pool">
<p>${pool.answer}</p>
<p>${pool.name}</p>
</c:forEach>
The above code doesn't works.
The error is:
org.apache.jasper.JasperException: An exception occurred processing JSP page /WEB-INF/views/home.jsp at line 21
18: <c:forEach items="${pools}" var="pool">
19:
20: <p>${pool.name}</p>
21: <c:out value="${pool.poolQuestion.answer}"/>
22:
23: </c:forEach>
24:
SEVERE: Servlet.service() for servlet appServlet threw exception
javax.el.PropertyNotFoundException: Property 'answer' not found on type com.pool.app.domain.Pool
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.WEB_002dINF.views.home_jsp._jspx_meth_c_005fforEach_005f0(home_jsp.java:119)
at org.apache.jsp.WEB_002dINF.views.home_jsp._jspService(home_jsp.java:78)
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.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1047)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:817)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:669)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:574)
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 org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
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:291)
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$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:680)
The model is:
public List<Pool> getAll(){
Session session = sessionFactory.getCurrentSession();
Query query = session.createQuery("From Pool as p left join fetch p.poolQuestions as s");
return query.list();
The controller is:
List<Pool> pool = poolService.getAll();
model.addAttribute("pools", pool);
And the View is:
<c:forEach items="${pools}" var="pool">
<p>${pool.name}</p>
<c:out value="${pool.answer}"/>
</c:forEach>
PS. the ${pool.name}
is displayed properly
Solution 1:[1]
javax.el.PropertyNotFoundException: Property 'foo' not found on type com.example.Bean
This literally means that the mentioned class com.example.Bean
doesn't have a public (non-static!) getter method for the mentioned property foo
. Note that the field itself is irrelevant here!
The public getter method name must start with get
, followed by the property name which is capitalized at only the first letter of the property name as in Foo
.
public Foo getFoo() {
return foo;
}
You thus need to make sure that there is a getter method matching exactly the property name, and that the method is public
(non-static
) and that the method does not take any arguments and that it returns non-void
. If you have one and it still doesn't work, then chances are that you were busy editing code forth and back without firmly cleaning the build, rebuilding the code and redeploying/restarting the application. You need to make sure that you have done so.
For boolean
(not Boolean
!) properties, the getter method name must start with is
instead of get
.
public boolean isFoo() {
return foo;
}
Regardless of the type, the presence of the foo
field itself is thus not relevant. It can have a different name, or be completely absent, or even be static
. All of below should still be accessible by ${bean.foo}
.
public Foo getFoo() {
return bar;
}
public Foo getFoo() {
return new Foo("foo");
}
public Foo getFoo() {
return FOO_CONSTANT;
}
You see, the field is not what counts, but the getter method itself. Note that the property name itself should not be capitalized in EL. In other words, ${bean.Foo}
won't ever work, it should be ${bean.foo}
.
See also:
- javax.el.PropertyNotFoundException: Property 'foo' not readable on type java.lang.Boolean
- How does Java expression language resolve boolean attributes? (in JSF 1.2)
- Identifying and solving javax.el.PropertyNotFoundException: Target Unreachable
- Outcommented Facelets code still invokes EL expressions like #{bean.action()} and causes javax.el.PropertyNotFoundException on #{bean.action}
Solution 2:[2]
I believe the id accessors don't match the bean naming conventions and that's why the exception is thrown. They should be as follows:
public Integer getId() { return id; }
public void setId(Integer i){ id= i; }
Solution 3:[3]
Check the items in forEach
<c:forEach items="${pools}" var="pool">
${pool.name}
</c:forEach>
Some times items="${pools}" has an extra space or it acts like string, retyping it should solve the issue.
Solution 4:[4]
EL interprets ${class.name}
as described - the name becomes getName() on the assumption you are using explicit or implicit methods of generating getter/setters
You can override this behavior by explicitly identifying the name as a function:
${class.name()}
This calls the function name() directly without modification.
Solution 5:[5]
I get the same error on my JSP and the bad rated answer was correct
I had the folowing line:
<c:forEach var="agent" items=" ${userList}" varStatus="rowCounter">
and get the folowing error:
javax.el.PropertyNotFoundException: Property 'agent' not found on type java.lang.String
deleting the space before ${userList} solved my problem
If some have the same problem, he will find quickly this post and does not waste 3 days in googeling to find help.
Solution 6:[6]
I was facing the similar type of issue: Code Snippet :
<c:forEach items="${orderList}" var="xx">
${xx.id} <br>
</c:forEach>
There was a space after orderlist like this : "${orderList} " because of which the xx variable was getting coverted into String and was not able to call xx.id.
So make sure about space. They play crucial role sometimes. :p
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
Solution | Source |
---|---|
Solution 1 | Community |
Solution 2 | bummi |
Solution 3 | s99 |
Solution 4 | sdw |
Solution 5 | DOM67 |
Solution 6 | Rajat |