java - LuaJ - 在 Java 中创建 Lua 函数

Question

有没有办法在Java中创建一个Lua函数并将其传递给Lua以将其分配给变量？

例如:

• 在我的 Java 类中:

  private class doSomething extends ZeroArgFunction {
      @Override
      public LuaValue call() {
          return "function myFunction() print ('Hello from the other side!'); end" //it is just an example
      }
  }
  

• 在我的 Lua 脚本中:

  myVar = myHandler.doSomething();
  myVar();
  

在这种情况下，输出将是:“Hello from the other side!”

Answer 1

尝试使用 Globals.load() 从脚本字符串构造函数，并使用 LuaValue.set() 在全局中设置值:

static Globals globals = JsePlatform.standardGlobals();

public static class DoSomething extends ZeroArgFunction {
    @Override
    public LuaValue call() {
        // Return a function compiled from an in-line script
        return globals.load("print 'hello from the other side!'");
    }
}

public static void main(String[] args) throws Exception {
    // Load the DoSomething function into the globals
    globals.set("myHandler", new LuaTable());
    globals.get("myHandler").set("doSomething", new DoSomething());

    // Run the function
    String script = 
            "myVar = myHandler.doSomething();"+
            "myVar()";
    LuaValue chunk = globals.load(script);
    chunk.call();
}