第一步：编写接口
HelloWorld.java
package com.xuzhiwen.spring3; public interface HelloWorld { public abstract void printHelloWorld(String msg); }第二步：编写实现类
package com.xuzhiwen.spring3; public class HelloWorldImpl implements HelloWorld{ @Override public void printHelloWorld(String msg) { System.out.println("hello: " + msg); } }第三步：编写javaconfig 配置等效的Java
AppConfig.java
package com.xuzhiwen.spring3; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class AppConfig { @Bean(name="hellowrold") public HelloWorld getHelloWorld(){ return new HelloWorldImpl(); } }该文件等效于：
<bean id="helloworld" class="com.xuzhiwen.spring2.HelloWorldImpl" />第四步：编写测试类
package com.xuzhiwen.spring3; import org.springframework.context.ApplicationContext; import org.springframework.context.annotation.AnnotationConfigApplicationContext; public class TestHelloWorld { public static void main(String[] args) { ApplicationContext app = new AnnotationConfigApplicationContext(AppConfig.class); HelloWorld helloworld = (HelloWorld) app.getBean("hellowrold"); helloworld.printHelloWorld("good boy"); } }第五步：运行结果如下
文件结构如下：
转载于:https://www.cnblogs.com/beibidewomen/p/7383020.html
