jsp – javax.el.PropertyNotFoundException：类型为java.lang.Boolean的属性’foo’不可读

public class ScoreDefinition {

    protected Boolean primary;

    public Boolean isPrimary() {
        return primary;
    }

    public void setPrimary(Boolean value) {
        this.primary = value;
    }

}

我正试图通过EL访问其主要财产：

<c:forEach var="score" items="${scores}">
    <input type="checkbox"
           value="${score.primary}"
           name="someName"
           class="textField"/>
</c:forEach>

但我得到了例外：

javax.el.PropertyNotFoundException: Property 'primary' not readable on type java.lang.Boolean
    at javax.el.BeanELResolver$BeanProperty.read(BeanELResolver.java:280)
    at javax.el.BeanELResolver$BeanProperty.access$000(BeanELResolver.java:230)
    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.administer.projectBlocks_jsp._jspx_meth_c_005fforEach_005f2(projectBlocks_jsp.java:806)
    at org.apache.jsp.WEB_002dINF.views.administer.projectBlocks_jsp._jspx_meth_c_005fif_005f2(projectBlocks_jsp.java:709)
    at org.apache.jsp.WEB_002dINF.views.administer.projectBlocks_jsp._jspx_meth_form_005fform_005f0(projectBlocks_jsp.java:245)
    at org.apache.jsp.WEB_002dINF.views.administer.projectBlocks_jsp._jspService(projectBlocks_jsp.java:150)
    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:262)
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1180)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:950)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
    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 com.groupgti.webclient.filter.SecurityFilter.doFilter(SecurityFilter.java:51)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.groupgti.webclient.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:43)
    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)

我不能更改此类，因为它是从WSDL文件生成的。所以问题是如何解决这个问题，而不是使用任何定制的EL函数来将Boolean转换成String或者不将该对象转换为我的？有可能以某种方式在EL中读取此属性，无需任何其他修改？

您有两个选择：

>使用布尔值而不是布尔值。
>或者，重命名方法isPrimary()到getPrimary()。

至于自动生成错误方法的JAXB blunder，您需要至少升级到JAXB 2.1.13，或者按照JAXB documentation将-B-enableIntrospection添加到wsimport调用。

也可以看看：

> JavaBeans specification – Chapter 8.3.2
> How does Java expression language resolve boolean attributes? (in JSF 1.2)
> JSF 2 checkboxes and boolean getters