小代码js

/***************
frist js

****************/
import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class wz {

public static void main(String[] args) {

ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("javascript");
//也可以将javascript改成js

try{
runJs(engine, 2.0, 400.0);
} catch(ScriptException e){
e.printStackTrace();
} catch (NoSuchMethodException e2){
e2.printStackTrace();
}
}

public static void runJs(ScriptEngine engine, double M3_FN, double M3_fh1)
throws ScriptException, NoSuchMethodException
{
String script = "function f1(a){ return a*10;}";
engine.eval(script);
Invocable inv = (Invocable) engine;
Object obj = inv.invokeFunction("f1", 2);//f1是方法名，2是实参
System.out.println(obj);

String js = "function f2()\n{\n   var a=0; var b="+M3_FN+"*"+obj+"/3600; \n   if("+M3_fh1+">=50){ a="+M3_fh1+"+b;}\n   return a;\n}";
System.out.println(js);
engine.eval(js);
Object obj2 = inv.invokeFunction("f2");
System.out.println(obj2);

}
}