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This article introduces the relevant knowledge of "what is the programming method of java dynamic loading plug-in". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Preface

Plug-in is a cool feature for java programmers, and the waiter is lucky enough to do it at work.

Background:

Need to synchronize the data of mysql to kafka/mysql/hdfs and so on through canal.

Realize

/ * Created by shengjk1 on 2017-12-11 * / public class PluginManager {private final static Logger logger = LoggerFactory.getLogger (SendMessageFactory.class); private URLClassLoader urlClassLoader; public PluginManager (List plugins) throws MalformedURLException {init (plugins);} / / dynamically load all plug-ins into JVM private void init (List plugins) throws MalformedURLException {int size = plugins.size (); URL [] urls = new URL [size]; for (int I = 0; I < size; iSuppli +) {Plugin plugin = plugins.get (I) String filePath = plugin.getJar (); urls [I] = new URL ("file:" + filePath);} urlClassLoader = new URLClassLoader (urls);} public PluginService getInstance (String className) throws ClassNotFoundException, InstantiationException, IllegalAccessException {/ / plug-in instantiates the object to get each plug-in specific object Class clazz = urlClassLoader.loadClass (className); Object instance = clazz.newInstance (); return (PluginService) instance;}}

Then you can call the plug-in.

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