HTML多个事件触发相同的功能(HTML multiple events to trigger the same function)

 
 
 根据java ee 5 api， ExpressionFactory提供了一个方法#newInstance 。 
 
 
 好吧，javadoc不是证明，实际上，这很可能是Java EE 5 javadoc中的一个错误。 在JSR-245的维护评论1中添加了两个newInstance()工厂方法（使EL独立并从JSP 2.1中取出，详细了解JSR-245 MR1更改日志 ）但是评论从未发布过 。 
 
 因此，在java.net repo中可用的java-ee包中找不到此方法也就不足为奇了。 
 
 
 
 但是这个罐子没有提供这种方法。 所以我得到了编译错误。 
 
 
 正如所料。 这个方法不在Java EE 5中（至少这是我的理解）。 所以你需要使用： 
 
ExpressionFactory factory = new ExpressionFactoryImpl();
 
 
 
 maven（java.dev.net）提供的官方Java EE 6.0 jar包含此方法。 
 
 
 是的，因为这是Java EE 6，因为EL现在是独立的，有自己的规范（从技术上讲，EL仍然在JSR-245中，如果这令人困惑，很抱歉）。 所以Java EE 6包含了EL 2.2（是的，版本从1.1跳到2.1.2然后是2.2，以便更好地与JSP版本保持一致）。 这个版本确实暴露了ExpressionFactory上的newInstance()方法。 

 
 
According to java ee 5 api ExpressionFactory provides a method #newInstance.
 
 
Well, javadoc is not a proof and, actually, this is very likely an error in the Java EE 5 javadoc. The two newInstance() factory methods have been added in the Maintenance Review 1 of the JSR-245 (to make EL standalone and take it out of JSP 2.1, have a look at the JSR-245 MR1 Change Log for the details) but that review has never been released.
 
So it's not surprising that you don't find this method in the java-ee bundle available in the java.net repo.
 
 
 
But this jar does not provide this method. So I get compiler errors.
 
 
As expected. This method is not in Java EE 5 (at least this is my understanding). So you need to use:
 
ExpressionFactory factory = new ExpressionFactoryImpl();
 
 
 
The official Java EE 6.0 jar provided by maven (java.dev.net) contains this method.
 
 
Yes, because this is Java EE 6, because EL is now standalone, with its own specification (technically, EL is still in JSR-245, sorry if this is confusing). So Java EE 6 includes EL 2.2 (yes, the version jumped from 1.1 to 2.1.2 and then 2.2 for a better alignment with the JSP version). And this version does expose the newInstance() methods on ExpressionFactory.