小编典典

require.js在rhino上运行良好。最近，我在一个项目中使用了它。

您必须确保使用r.js(不是require.js)，犀牛的require.js的修改版本。

您必须扩展ScritableObject类才能实现load和print运行。调用时require(["a"])，将调用此类中的load函数，您可以调整此函数以从任何位置加载js文件。在以下示例中，我从加载classpath。

您必须arguments在sharedscope中定义属性，如下面的示例代码所示

(可选)您可以使用配置子路径require.config，以指定classpath内js文件所在的子目录。

JsRuntime支持

public class JsRuntimeSupport extends ScriptableObject {

private static final long serialVersionUID = 1L;

private static Logger logger = Logger.getLogger(JsRuntimeSupport.class);

private static final boolean silent = false;

@Override

public String getClassName() {

return "test";

}

public static void print(Context cx, Scriptable thisObj, Object[] args,

Function funObj) {

if (silent)

return;

for (int i = 0; i < args.length; i++)

logger.info(Context.toString(args[i]));

}

public static void load(Context cx, Scriptable thisObj, Object[] args,

Function funObj) throws FileNotFoundException, IOException {

JsRuntimeSupport shell = (JsRuntimeSupport) getTopLevelScope(thisObj);

for (int i = 0; i < args.length; i++) {

logger.info("Loading file " + Context.toString(args[i]));

shell.processSource(cx, Context.toString(args[i]));

}

}

private void processSource(Context cx, String filename)

throws FileNotFoundException, IOException {

cx.evaluateReader(this, new InputStreamReader(getInputStream(filename)), filename, 1, null);

}

private InputStream getInputStream(String file) throws IOException {

return new ClassPathResource(file).getInputStream();

}

}

样例代码

public class RJsDemo {

@Test

public void simpleRhinoTest() throws FileNotFoundException, IOException {

Context cx = Context.enter();

final JsRuntimeSupport browserSupport = new JsRuntimeSupport();

final ScriptableObject sharedScope = cx.initStandardObjects(browserSupport, true);

String[] names = { "print", "load" };

sharedScope.defineFunctionProperties(names, sharedScope.getClass(), ScriptableObject.DONTENUM);

Scriptable argsObj = cx.newArray(sharedScope, new Object[] {});

sharedScope.defineProperty("arguments", argsObj, ScriptableObject.DONTENUM);

cx.evaluateReader(sharedScope, new FileReader("./r.js"), "require", 1, null);

cx.evaluateReader(sharedScope, new FileReader("./loader.js"), "loader", 1, null);

Context.exit();

}

}

loader.js

require.config({

baseUrl: "js/app"

});

require (["a", "b"], function(a, b) {

print('modules loaded');

});

js/app 目录应该在您的类路径中。

2020-11-13