“etherpad”中的“jimport”功能如何工作？
[英]How does the “jimport” function from “etherpad” work?
问题描述
In etherpad's source I've seen code like: 
在etherpad的源代码中，我看过如下代码：
jimport(java.util.Date, "JDate");
But it doesn't seem like some kind of javascript standard. 但它似乎不是某种javascript标准。
How is it done? 怎么做？
3 个解决方案
解决方案1
4 已采纳 2011-06-22 11:17:49
Looks like you're looking at the etherpad source. 看起来你正在看以太网源。 There they defined a helper function named jimport . 他们在那里定义了一个名为jimport的辅助函数 。
As mentioned, etherpad uses Rhino as its Javascript engine, which have Java available at his fingertips. 如上所述，etherpad使用Rhino作为其Javascript引擎，它可以在指尖轻松获得Java。 So it is enough to make 所以它就足够了
file = java.io.File
in order to "import" it. 为了“导入”它。
This function uses the helper function _jimportSinglePackage , to inject the Java package into the local Javascript scope. 此函数使用辅助函数_jimportSinglePackage将Java包注入本地Javascript范围。
This function receives the package name, and the global scope to which it'll inject the package to, and given abc its essentially calling globalscope[c] = abc , in order to import this Java package. 这个函数接收包名称，以及它将包注入的全局范围，并给出abc它本质上调用globalscope[c] = abc ，以便import这个Java包。
解决方案2
3 2011-06-22 10:48:05
The ability to load Java libraries in JavaScript is highly-dependent on which server-side JavaScript framework you're using. 在JavaScript中加载Java库的能力在很大程度上取决于您正在使用的服务器端JavaScript框架。
Loading Java is definitely supported by Rhino . Rhino肯定支持加载Java。 From the docs: 来自文档：
js> importPackage(java.io)
js> File
[JavaClass java.io.File]
解决方案3
1 2011-06-22 11:40:14
Another way to use Java classes from JavaScript: 从JavaScript使用Java类的另一种方法：
<html>
<body>
<script type="text/javascript">
document.write(new java.util.Date());
</script>
</body>
</html>
See Call a Java method from Javascript for more details. 有关更多详细信息，请参阅从Javascript调用Java方法 。
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