Groovy动态解析

Posted 2021-11-23 红桃xin

https://www.cnblogs.com/hunttown/p/6800591.html

//创建engine实例直接解析文本内容
ScriptEngineManager factory = new ScriptEngineManager();

//每次生成一个engine实例
ScriptEngine engine = factory.getEngineByName("groovy");
System.out.println(engine.toString());
assert engine != null;
Bindings binding = engine.createBindings();
binding.put("date", new Date());

//如果script文本来自文件,请首先获取文件内容
engine.eval("def getTime(){return date.getTime();}", binding);
engine.eval("def sayHello(name,age){return 'Hello,I am ' + name + ',age' + age;}");
Long time = (Long) ((Invocable) engine).invokeFunction("getTime", null);
System.out.println(time);
String message = (String) ((Invocable) engine).invokeFunction("sayHello", "zhangsan", new Integer(12));
System.out.println(message);