javax.script.ScriptEngine类的使用及代码示例

x33g5p2x  于2022-01-29 转载在 其他  
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本文整理了Java中javax.script.ScriptEngine类的一些代码示例，展示了ScriptEngine类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ScriptEngine类的具体详情如下：
包路径：javax.script.ScriptEngine
类名称：ScriptEngine

ScriptEngine介绍

[英]See Javadoc of Java Scripting API
[中]参见Java Scripting API的Javadoc

代码示例

代码示例来源：origin: stackoverflow.com

ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("JavaScript");
// read script file
engine.eval(Files.newBufferedReader(Paths.get("C:/Scripts/Jsfunctions.js"), StandardCharsets.UTF_8));

Invocable inv = (Invocable) engine;
// call function from script file
inv.invokeFunction("yourFunction", "param");

代码示例来源：origin: internetarchive/heritrix3

@Override
protected void innerProcess(CrawlURI curi) {
  // depending on previous configuration, engine may 
  // be local to this thread or shared
  ScriptEngine engine = getEngine(); 
  synchronized(engine) {
    // synchronization is harmless for local thread engine,
    // necessary for shared engine
    engine.put("curi",curi);
    engine.put("appCtx", appCtx);
    try {
      engine.eval("process(curi)");
    } catch (ScriptException e) {
      logger.log(Level.WARNING,e.getMessage(),e);
    } finally { 
      engine.put("curi", null);
      engine.put("appCtx", null);
    }
  }
}

代码示例来源：origin: Netflix/conductor

public static Object eval(String script, Object input) throws ScriptException {
    Bindings bindings = engine.createBindings();
    bindings.put("$", input);
    return engine.eval(script, bindings);
    
  }
}

代码示例来源：origin: plantuml/plantuml

public String eval(String line) throws ScriptException {
    final ScriptContext context = engine.getContext();
    final StringWriter sw = new StringWriter();
    context.setWriter(new PrintWriter(sw));
    engine.eval(line, context);
    final String result = sw.toString();
    return result;
  }
}

代码示例来源：origin: castagna/jena-examples

public static void main(String[] args) throws FileNotFoundException {
    ScriptEngineManager sem = new ScriptEngineManager();
    ScriptEngine ruby = sem.getEngineByExtension("rb");
    try {
      FileReader reader = new FileReader(new File("src/main/jruby", "hello_jena.rb"));
      ruby.eval(reader);
    } catch (ScriptException ex) {
      ex.printStackTrace();
    }
  }
}

代码示例来源：origin: apache/accumulo

ScriptEngineManager mgr = new ScriptEngineManager();
  engineName = cl.getOptionValue(engine.getOpt());
 ScriptEngine engine = mgr.getEngineByName(engineName);
 if (engine == null) {
  shellState.printException(new Exception(engineName + " not found"));
 Bindings b = engine.getBindings(ScriptContext.ENGINE_SCOPE);
 putConnector(b, shellState.getAccumuloClient());
 b.put("client", shellState.getAccumuloClient());
 ctx.setBindings(b, ScriptContext.ENGINE_SCOPE);
 Object[] argArray = argValues.toArray(new Object[argValues.size()]);
   return 1;
  Reader reader = new FileReader(f);
  try {
   engine.eval(reader, ctx);
   if (invoke) {
    this.invokeFunctionOrMethod(shellState, engine, cl, argArray);
    engine.eval(inlineScript, ctx);
    if (invoke) {
     this.invokeFunctionOrMethod(shellState, engine, cl, argArray);

代码示例来源：origin: stackoverflow.com

ScriptEngine engine = new ScriptEngineManager().getEngineByMimeType( "text/javascript" );
Bindings bindings = engine.getBindings( ScriptContext.GLOBAL_SCOPE );
bindings.put( "varname", ... );
bindings.put( ... );
engine.put( ScriptEngine.FILENAME, script.toString());
engine.eval( new FileReader( script ));

代码示例来源：origin: lenskit/lenskit

ScriptEngineManager sem = new ScriptEngineManager();
File scriptFile = options.get("script");
String ext = Files.getFileExtension(scriptFile.getName());
ScriptEngine seng = sem.getEngineByExtension(ext);
logger.info("running {} with engine {}", scriptFile, seng);
SimpleBindings bindings = new SimpleBindings();
bindings.put("logger", LoggerFactory.getLogger(scriptFile.getName()));
bindings.put("args", options.<List<String>>get("args"));
bindings.put("recommender", rec);
try (Reader reader = new FileReader(scriptFile)) {
  seng.eval(reader, bindings);
} catch (IOException e) {
  throw new LenskitCommandException("error loading script file", e);

代码示例来源：origin: stackoverflow.com

import javax.script.ScriptEngineManager;
import javax.script.ScriptEngine;

public class Test {
 public static void main(String[] args) throws Exception{
  ScriptEngineManager mgr = new ScriptEngineManager();
  ScriptEngine engine = mgr.getEngineByName("JavaScript");
  String foo = "40+2";
  System.out.println(engine.eval(foo));
  } 
}

代码示例来源：origin: jphp-group/jphp

@Test
public void testVariableGet() throws Exception {
  ScriptEngineManager factory = new ScriptEngineManager();
  ScriptEngine engine = factory.getEngineByName("jphp");
  engine.eval("<?php $baz = 'test value';");
  Assert.assertEquals("test value", engine.get("baz").toString());
}

代码示例来源：origin: wildfly/wildfly

protected Map<String,String> parseJsonResponse(String json) throws ScriptException
  {
    synchronized (scriptEngineLock)
    {
      if (scriptEngine == null)
      {
        scriptEngine = new ScriptEngineManager().getEngineByName("JavaScript");
        if (scriptEngine == null) {
          throw new RuntimeException("Failed to load JavaScript script engine");
        }
             }
      Bindings bindings = new SimpleBindings();
      bindings.put("json", json);
      
      return (Map<String, String>)scriptEngine.eval(JSON_RESPONSE_PARSING_SCRIPT, bindings);
    }
  }
}

代码示例来源：origin: RaiMan/SikuliX2

private boolean runJS() {
 ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
 String scriptBefore =
     "var Do = Java.type('com.sikulix.api.Do');\n" +
     "var SX = Java.type('com.sikulix.core.SX');\n" +
     "log = SX.getSXLog(\"SX.JAVASCRIPTRUNNER\");\n";
 if (withTrace) {
  scriptBefore += "log.on(SX.TRACE);\n";
 }
 String scriptText = scriptBefore;
 scriptText += script;
 log.trace("%s: running script %s", ScriptType.JAVASCRIPT, scriptName);
 if (withTrace) {
  log.p(script);
  log.p("---------- end of script");
 }
 Object returned = null;
 try {
  returned = engine.eval(scriptText);
 } catch (ScriptException e) {
  log.trace("%s: error: %s", ScriptType.JAVASCRIPT, e.getMessage());
  returnObject = new ReturnObject(false);
  return false;
 }
 log.trace("%s: ending run", ScriptType.JAVASCRIPT);
 returnObject = new ReturnObject(ScriptType.JAVASCRIPT, returned);
 return true;
}

代码示例来源：origin: apache/tinkerpop

public boolean test(final Object a) {
  try {
    final Bindings bindings = new SimpleBindings();
    bindings.put(A, a);
    return (boolean) this.engine.eval(this.script, bindings);
  } catch (final ScriptException e) {
    throw new IllegalArgumentException(e.getMessage());
  }
}

代码示例来源：origin: stackoverflow.com

import javax.script.*;

public class ScriptRunner {
  public static void main(String[] args) throws ScriptException {
    ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
    ScriptEngine nashorn = scriptEngineManager.getEngineByName("nashorn");
    String scriptName = args[0];
    Bindings bindings = nashorn.createBindings();
    bindings.put("scriptFileName", scriptName);
    nashorn.setBindings(bindings, ScriptContext.ENGINE_SCOPE);
    nashorn.eval("load('src/main/resources/javascript/' + scriptFileName)");
  }

代码示例来源：origin: jphp-group/jphp

@Test
public void testVariableSet() throws Exception {
  ScriptEngineManager factory = new ScriptEngineManager();
  ScriptEngine engine = factory.getEngineByName("jphp");
  engine.put("foo", "bar");
  Object value = engine.eval("<?php return $foo;");
  Assert.assertEquals("bar", value.toString());
}

代码示例来源：origin: stackoverflow.com

String javaScriptExpression = "sayHello(name);";
Reader javaScriptFile = new StringReader(
  "function sayHello(name) {\n"
    + "    println('Hello, '+name+'!');\n" + "}");

ScriptEngineManager factory = new ScriptEngineManager();
ScriptEngine engine = factory
  .getEngineByName("JavaScript");
ScriptContext context = engine.getContext();
context.setAttribute("name", "JavaScript",
  ScriptContext.ENGINE_SCOPE);

engine.eval(javaScriptFile);
engine.eval(javaScriptExpression);

代码示例来源：origin: stackoverflow.com

ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("nashorn");

ScriptContext ctx = new SimpleScriptContext();
ctx.setBindings(engine.createBindings(), ScriptContext.ENGINE_SCOPE);
engine.eval("function hello() { return 'Hello!'; }", ctx);
engine.setContext(ctx);

((Invocable) engine).invokeFunction("hello");

代码示例来源：origin: stackoverflow.com

ScriptEngine engine = new ScriptEngineManager().getEngineByName("javascript");
ScriptContext context = engine.getContext();
StringWriter writer = new StringWriter();
context.setWriter(writer);

engine.eval("print('Welocme to java worldddd')");

String output = writer.toString();

System.out.println("Script output: " + output);

代码示例来源：origin: apache/nifi

Bindings bindings = scriptEngine.getBindings(ScriptContext.ENGINE_SCOPE);
if (bindings == null) {
  bindings = new SimpleBindings();
bindings.put("context", context);
bindings.put("log", log);
bindings.put("vmMetrics", vmMetrics);
scriptEngine.setBindings(bindings, ScriptContext.ENGINE_SCOPE);
  configurator.eval(scriptEngine, scriptToRun, scriptingComponentHelper.getModules());
} else {
  scriptEngine.eval(scriptToRun);

代码示例来源：origin: stackoverflow.com

import java.util.*;
import javax.script.*;

public class TestBindings {
  public static void main(String args[]) throws Exception {
    String script = "function doSomething() {var d = date}";
    ScriptEngine engine =  new ScriptEngineManager().getEngineByName("JavaScript");
    Compilable compilingEngine = (Compilable) engine;
    CompiledScript cscript = compilingEngine.compile(script);

    //Bindings bindings = cscript.getEngine().createBindings();
    Bindings bindings = engine.getBindings(ScriptContext.ENGINE_SCOPE);
    for(Map.Entry me : bindings.entrySet()) {
      System.out.printf("%s: %s\n",me.getKey(),String.valueOf(me.getValue()));
    }
    bindings.put("date", new Date());
    //cscript.eval();
    cscript.eval(bindings);

    Invocable invocable = (Invocable) cscript.getEngine();
    invocable.invokeFunction("doSomething");
  }
}

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