scriptengine

问题 I am having an issue where I always get a 0 value returned when I try to use the ScriptEngine eval. By using Logger, I was able to determine that there are NullPointerExceptions being generated. After further inspection, it appears that GAE doesn't always return a valid script engine (if ever), because it throws an exception when you try to use it. My code looks like: public double myEval(String JsFormulaStr ) { double solutionValue = 0; ScriptEngineManager mgr = new ScriptEngineManager();

问题 I want to execute Embedded python in Java. Python code #!/usr/bin/python import sys print 'Number of arguments:', len(sys.argv), 'arguments.' print 'Argument List:', str(sys.argv) Java Code StringWriter writer = new StringWriter(); // ouput will be stored here ScriptEngineManager manager = new ScriptEngineManager(); ScriptContext context = new SimpleScriptContext(); context.setWriter(writer); // configures output redirection ScriptEngine engine = manager.getEngineByName("python"); engine.eval

问题 I have an API in a jar file but how can I use the classes from the jar in JavaScript? When I try importing them, conf = Packages.abcapi.Config; var cfg = new conf.Config(); It doesn't work. This is not going to be used in a browser or over the internet. UPDATE: I'm extending our API to all JSR-223 Scripting Languages using Java ScriptEngine. Inside the Java application I read a JavaScript File and then execute the file using ScriptEngine. I need for the JavaScript File to use classes from the

问题 Our project need ability to have a simple business rules our customers can script in Visual basic. While our main program is written on C# The script which customers want to execut could be like this (I am considering the simpliest possible case) var vbCode = @" If (Row.Code = 12) Then Row.MappedCode = 1 End If"; So I created a RowData class in C# with Code and MappedCode properties namespace ScriptModel { public class RowData { public int Code { get; set; } public int MappedCode { get; set;

问题 I have the following code which works: ScriptEngine jsEngine = ScriptEngineManager.new().getEngineByName("nashorn"); jsEngine.eval("some script"); jsEngine.invokeMethod(jsEngine.eval("foo"), "bar"); but I want to do use a pre-compiled script so I don't have to evaluate the script every time I need to run it, so I'm trying; ScriptEngine jsEngine = ScriptEngineManager.new().getEngineByName("nashorn"); CompiledScript compiledJS = jsEngine.compile("some script"); but then I'm not sure what to do

问题 Is it possible to reference the javax.script.ScriptEngine library when developing an android application? If not is there anyway possible to evaluate a javascript expression in android? 回答1: javax.script.ScriptEngine is not a default part of android, but you could easily jar up any libraries you need(assuming the size is reasonable, I'm not sure) and include them in your project. 回答2: For the classes javax.script.ScriptEngine, javax.script.ScriptEngineFactory and so on, you can add the jsr223

问题 i have simple crawler which crawl and search page. but now i have problem how to execute and parse js link from that page. Does anyone have any idea how to parse and execute js page? example: some_url is simple to parse with webhtmltoolktit JAVASCRIPT:runmeat(1,7,0,2,7,9) is js link which redirect then to some_url2 page and this page i need to crawl then. but problem is how to execute this javascript in C# to get that some_url2 link? 回答1: To answer the question title "How to parse and execute

问题 I am writing to offer an application in Java right now and instead of using the operator "+", the user of the application can literally use the word "add" to add two numbers together. I'm quite stuck on how to do this because I can't really use a method in order to complete the function considering I'd have to type "add()" rather than just "add". Unless there is a way to execute a method without the parentheses. Would I have to write a completely new class or is there an easier way to do this

问题 I am trying to use PageDown on the client side as an editor, and on the server side to then parse that Markdown to HTML. It seems to work fine on the client side, but on the server side, tickmarks are only "codifying" the character that follows, not the word that it wraps. So if I do this: test `test` test I expect this, and this is indeed what I get on the client side: test <code>test</code> test But on the server side, I end up getting this instead: test <code>t</code>est<code> </code>test

问题 I am trying to send one class through hostObject but apparently it doesn't want to work: using Roslyn.Compilers; using Roslyn.Compilers.CSharp; using Roslyn.Scripting; using Roslyn.Scripting.CSharp; public class ShippingService { public class ShippingDetails//class that I want to send { public decimal total { get; set; } public int quantity { get; set; } public string destination { get; set; } } public static string ShipingCost(decimal total, int quantity, string destination) { var details =