1、加载和卸载（每次都新建一个GroovyClassLoader 实例，然后使用新建的classloader去加载）

try {            GroovyClassLoader groovyClassLoader = new GroovyClassLoader();            Class
      clazz = groovyClassLoader.parseClass(orchestrationUnitDesc);            GroovyObject unit = (GroovyObject) clazz.newInstance();            result.setSuccess(true);            result.setResult(unit);            return result;        } catch (InstantiationException e) {            result.setSuccess(false);            result.setErrorMsg("groovy:InstantiationException:" + e.getMessage());            DataExchangeLogger.errorLog("", "", "groovy:InstantiationException", e);        } catch (IllegalAccessException e) {            result.setSuccess(false);            result.setErrorMsg("groovy:IllegalAccessException:" + e.getMessage());            DataExchangeLogger.errorLog("", "", "groovy:IllegalAccessException", e);        } catch (Exception e) {            result.setSuccess(false);            result.setErrorMsg("groovy:Exception:" + e.getMessage());            DataExchangeLogger.errorLog("", "", "groovy:Exception", e);        }

2、执行

   上面得到一个GroovyObject对象，执行方法就是调用GroovyObject的invokeMethod方法

// > 获取编排单元        GroovyObject unit = (GroovyObject) ServiceOrchestrationConfigManager.getOrchestrationUnit(message.getMsgType());        if (unit == null) {            result.setErrorCode(OpenErrorCode.S07.name());            result.setErrorMsg("orchestrationScript is null.");            result.setSuccess(false);            return result;        }        // > 调用服务编排        try {            unit.invokeMethod("setDoc", CustomXmlUtil.parseText2Doc(message.getRequestString()));            result = (SendResult) unit.invokeMethod("execute", message);            if (result == null) {                result = new SendResult();                result.setErrorCode(OpenErrorCode.S07.name());                result.setErrorMsg("下发编排脚本执行，返回为空");                result.setSuccess(false);            }        } catch (DocumentException e) {            result.setErrorCode(OpenErrorCode.S07.name());            result.setErrorMsg("请求报文转docment对象异常" + e.getMessage());            result.setSuccess(false);            DataExchangeLogger.errorLog(message.getBizId(), message.getMsgType(),                    "call service orchestration parseText2Doc error.", e);            return result;        } catch (Exception e) {            result.setErrorCode(OpenErrorCode.S07.name());            result.setErrorMsg("下发编排脚本执行异常" + e.getMessage());            result.setSuccess(false);            DataExchangeLogger.errorLog(message.getBizId(), message.getMsgType(),                    "call service orchestration excute script error. ", e);        }