知乎专栏 |
package cn.netkiller.service; public interface HelloWorldService { String sayHello(String name); }
package cn.netkiller.service.impl; import org.springframework.stereotype.Component; import cn.netkiller.service.HelloWorldService; @Component public class HelloWorldServiceImpl implements HelloWorldService { @Override public String sayHello(String name) { return "Hello World! " + name; } }