Sample code for the SPI mechanism of Java

Defining interfaces

Package Com.hiwzc.myspi;public interface Demo {void dosomething ();}

Two simulation implementations available

Package Com.hiwzc.myspi.impl;import Com.hiwzc.myspi.demo;public class Demoaimpl implements demo{@Override public vo    ID dosomething () {System.out.println ("A"); }}

Package Com.hiwzc.myspi.impl;import Com.hiwzc.myspi.demo;public class Demobimpl implements Demo {@Override public v    OID dosomething () {System.out.println ("B"); }}

Meta-inf/services/com.hiwzc.myspi.demo file that provides an implementation:

Com.hiwzc.myspi.impl.DemoAImpl

Code calls

Package Com.hiwzc.myspi;import Java.util.serviceloader;public class Main {public static void main (string[] args) {        serviceloader<demo> loader = serviceloader.load (Demo.class);        for (Demo Demo:loader) {demo.dosomething (); }    }}

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Sample code for the SPI mechanism of Java