我正在使用Mozilla Rhino 1.7r2(不是JDK版本),我想从Java调用JS函数。
我的JS功能是这样的:
function abc(x,y)
{
return x+y
}
我该怎么做?
编辑:( JS功能在一个单独的文件中)
答案 0 :(得分:34)
String script = "function abc(x,y) {return x+y;}";
Context context = Context.enter();
try {
ScriptableObject scope = context.initStandardObjects();
Scriptable that = context.newObject(scope);
Function fct = context.compileFunction(scope, script, "script", 1, null);
Object result = fct.call(
context, scope, that, new Object[] {2, 3});
System.out.println(Context.jsToJava(result, int.class));
} finally {
Context.exit();
}
更新:当函数在范围内加载时,以及其他函数和变量
String script = "function abc(x,y) {return x+y;}"
+ "function def(u,v) {return u-v;}";
Context context = Context.enter();
try {
ScriptableObject scope = context.initStandardObjects();
context.evaluateString(scope, script, "script", 1, null);
Function fct = (Function)scope.get("abc", scope);
Object result = fct.call(
context, scope, scope, new Object[] {2, 3});
System.out.println(Context.jsToJava(result, int.class));
} finally {
Context.exit();
}