tomcat - 将 tomcat 设置为与 eclipse jsf2 中的 dcevm 一起工作

Question

如何在 tomcat 和 eclipse 中使用 dcevm我下载了 jdk6u25 并将 tomcat7 设置为在 eclipse juno 中使用它然后当我更改托管 bean 中的任何内容时它可以工作，但没有考虑 xhtml 中的更改

我觉得是tomcat的问题

Answer 1

您至少必须清理 BeanElResolver 和 ElMethodCache。以下示例用于 jboss-el 实现:

private void clearJbossElMethodCache()  {
    try {
        Field cacheField = getField(org.jboss.el.util.ReflectionUtil.class, "methodCache");
        cacheField.setAccessible(true);
        Object cache = cacheField.get(null);
        Method m = cache.getClass().getMethod("clear");
        m.invoke(cache);
    }
    catch (Exception e) {
    }
}

public void clearBeanElResolver() {
    BeanELResolver beanELResolver = getSeamBeanELResover();
    doCleanBeanElResolver(beanELResolver);
    doCleanBeanElResolver(ELUtils.BEAN_RESOLVER);
    java.beans.Introspector.flushCaches();
}

private void doCleanBeanElResolver(BeanELResolver beanELResolver) {
        try {
            try {
                Field cacheField = getField(beanELResolver.getClass(), "cache");
                cacheField.setAccessible(true);
                Object cache = cacheField.get(beanELResolver);
                try {
                    Method m = cache.getClass().getMethod("clear");
                    m.invoke(cache);
                } catch (NoSuchMethodException e)
                {
                    Class<?> cacheClass = getClass().getClassLoader().loadClass("javax.el.BeanELResolver$ConcurrentCache");
                    Constructor<?> con = cacheClass.getConstructor(int.class);
                    con.setAccessible(true);
                    Object cacheInstance = con.newInstance(100);
                    cacheField.set(beanELResolver, cacheInstance);
                }

            }
            catch (NoSuchFieldException ee) {
                Field props = getField(beanELResolver.getClass(), "properties");
                props.setAccessible(true);
                Object cache = props.get(beanELResolver);
                Method m = cache.getClass().getMethod("clear");
                m.invoke(cache);
            }
        }
        catch (Exception e) {
        }
}

private BeanELResolver getSeamBeanELResover() {
    if (EL.EL_RESOLVER instanceof CompositeELResolver) {
        CompositeELResolver compositeElResolver = (CompositeELResolver) EL.EL_RESOLVER;
        try {
            Field elResolvesField = getField(CompositeELResolver.class, "resolvers");
            elResolvesField.setAccessible(true);
            ELResolver elResolvers[] = (ELResolver[]) elResolvesField.get(compositeElResolver);
            for (ELResolver elResolver: elResolvers) {
                if (elResolver instanceof BeanELResolver) {
                    return (BeanELResolver) elResolver;
                }
            }
        }
        catch (Exception e) {
        }
    }
    return null;
}