javascript Java，nashorn 访问另一个 js 文件
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Java, nashorn accessing another js file
提问by hnnn
Is it possible to include one js from another with java nashorn engine?
是否可以使用 java nashorn 引擎从另一个 js 中包含一个 js？
ScriptEngine engine = new ScriptEngineManager().getEngineByName("Nashorn");
InputStreamReader rs = new InputStreamReader(new FileInputStream(new File(.../script.js));
engine.eval(rs);
script.js
脚本.js
var System = Java.type('java.lang.System');
// document.write("./test.js"); - javax.script.ScriptException: ReferenceError: "document" is not defined
// require('./test.js'); - require is not defined
test.js
测试.js
System.out.println("reading test.js file");
i want to create top level script (in this example its script.js) and use it as a library for other scripts in same directory.
我想创建顶级脚本（在本例中是它的 script.js）并将其用作同一目录中其他脚本的库。
回答by Vik Gamov
you can use Nashorn's load()function
你可以使用 Nashorn 的load()功能
https://wiki.openjdk.java.net/display/Nashorn/Nashorn+extensions
https://wiki.openjdk.java.net/display/Nashorn/Nashorn+extensions
// can load script from files, URLs
load("foo.js"); // loads script from file "foo.js" from current directory
load("http://www.example.com/t.js"); // loads script file from given URL
// loads script from an object's properties.
// Object should have "script" and "name" properties.
// "script" property contains string code of the script.
// "name" property specifies name to be used while reporting errors from script
// This is almost like the standard "eval" except that it associates a name with
// the script string for debugging purpose.
load({ script: "print('hello')", name: "myscript.js"})
// load can also load from pseudo URLs like "nashorn:", "fx:". "nashorn:" pseudo URL scheme
// for nashorn's built-in scripts. "fx:" pseudo URL scheme for JavaFX support scripts
// load nashorn's parser support script - defines 'parse'
// function in global scope
load("nashorn:parser.js");
// load Mozilla compatibility script - which defines global functions
// like importPackage, importClass for rhino compatibility.
load("nashorn:mozilla_compat.js");
回答by Zo72
Nashornis brilliant.
纳什恩是个天才。
And it comes with the built-in loadmethod !!!
并且自带加载方法！！！
load can take a URL so you can exploit great JavaScript libraries on the CDNJS
load 可以接受一个 URL，这样你就可以利用 CDNJS 上的优秀 JavaScript 库
if you use nudge4jyou can get kangax's html minifierrunning just like this:
如果你使用nudge4j，你可以 像这样运行kangax 的 html minifier：
load('https://cdnjs.cloudflare.com/ajax/libs/html-minifier/3.3.3/htmlminifier.js')
minify = require('html-minifier').minify;
input = '<div> <p> foo </p> </div>';
output = minify(input, { collapseWhitespace: true });
