Java中加载Groovy文件及调用其方法

本例中，我们会使用GroovyClassLoader来加载groovy脚本。

GroovyClassLoader是一个定制的类装载器，负责解释加载Java类中用到的Groovy类。它也能编译。清单2.21展示了如何使用GroovyClassLoader加载Groovy类并且调用该类的一个方法。

@Component
public class AccessComputeService {

    public static final Logger logger = LoggerFactory.getLogger(AccessComputeService.class);

    private static GroovyClassLoader loader;

    private static final ConcurrentHashMap<String,GroovyObject> groovyObjects = new ConcurrentHashMap<>();

    static {
        PathMatchingResourcePatternResolver resolver = new  PathMatchingResourcePatternResolver();
        loader = new GroovyClassLoader(AccessComputeService.class.getClassLoader());
        try {
            //适配读取classpath下面的*.groovy文件列表
            Resource[] resources = resolver.getResources("classpath:accessScore/*.groovy");
            if(resources==null || resources.length==0){
                logger.warn("未获取到groovy文件");
            }else{
                for (Resource resource: resources) {
                    try ( InputStream inputStream = AccessComputeService.class.getClassLoader().getResourceAsStream("accessScore/" + resource.getFilename())){
                        logger.info("加载准入评分groovy脚本:{}", resource.getFilename());
                        String text = CharStreams.toString(new InputStreamReader(inputStream, "UTF-8"));
                        Class groovyClass = loader.parseClass(text,resource.getFilename());
                        GroovyObject scriptInstance = (GroovyObject)groovyClass.newInstance();
                        groovyObjects.put(resource.getFilename().split("\\.")[0],scriptInstance);
                    }
                }
            }
        } catch (Exception e) {
            logger.error("groovy 引擎初始化失败！！！！！！！！",e);
        }
    }

    public void execute(String scriptFileName, String scriptFunctionName, Map<String, Object> dataMap) {
        //scriptFileName:文件名,scriptFunctionName:文件的方法,dataMap:参数
        Strong result = (String)groovyObjects.get(scriptFileName).invokeMethod(scriptFunctionName, dataMap);
    }
}

 

其他调用groovy的方式：

http://blog.csdn.net/eric_sunah/article/details/11541307