相关疑难解决方法(0)

请考虑以下界面:

public interface I {
    default String getProperty() {
        return "...";
    }
}

和刚刚重用默认实现的实现类:

public final class C implements I {
    // empty
}

每当C在JSP EL脚本上下文中使用实例时:

<jsp:useBean id = "c" class = "com.example.C" scope = "request"/>
${c.property}

- 我收到了PropertyNotFoundException:

javax.el.PropertyNotFoundException: Property 'property' not found on type com.example.C
    javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:268)
    javax.el.BeanELResolver$BeanProperties.access$300(BeanELResolver.java:221)
    javax.el.BeanELResolver.property(BeanELResolver.java:355)
    javax.el.BeanELResolver.getValue(BeanELResolver.java:95)
    org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:110)
    org.apache.el.parser.AstValue.getValue(AstValue.java:169)
    org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184)
    org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:943)
    org.apache.jsp.index_jsp._jspService(index_jsp.java:225)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

我最初的想法Tomcat 6.0对于Java 1.8功能来说太旧了,但我很惊讶Tomcat 8.0也受到了影响.当然,我可以通过显式调用默认实现来解决这个问题:

    @Override
    public String getProperty() {
        return I.super.getProperty();
    }

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