spring xml file - applicationcontext.xml :

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
	xsi:schemalocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
 
	<bean id="hellobean" class="com.h3.hello.impl.helloworldimpl">
		
</beans>

package com.h3.config;

import org.springframework.context.annotation.bean;
import org.springframework.context.annotation.configuration;
import com.h3.hello.helloworld;
import com.h3.hello.impl.helloworldimpl;

@configuration
public class appconfig {
	
    @bean(name="hellobean")
    public helloworld helloworld() {
        return new helloworldimpl();
    }
	
}

spring javaconfig hello world

1. 工程目录结构

3. spring bean

一个简单的bean

package com.h3.hello;
 
public interface helloworld {
	
	void printhelloworld(string msg);
 
}

package com.h3.hello.impl;

import com.h3.hello.helloworld;

public class helloworldimpl implements helloworld {

	@override
	public void printhelloworld(string msg) {

		system.out.println("hello : " + msg);
	}

}

4. javaconfig 注解

package com.h3.config;

import org.springframework.context.annotation.bean;
import org.springframework.context.annotation.configuration;
import com.h3.hello.helloworld;
import com.h3.hello.impl.helloworldimpl;

@configuration
public class appconfig {
	
    @bean(name="hellobean")
    public helloworld helloworld() {
        return new helloworldimpl();
    }
	
}

5. 执行结果

使用 annotationconfigapplicationcontext 加载您的javaconfig类

package com.h3.core;
 
import org.springframework.context.applicationcontext;
import org.springframework.context.annotation.annotationconfigapplicationcontext;
import com.h3.config.appconfig;
import com.h3.hello.helloworld;
 
public class app {
	public static void main(string[] args) {
	    
            applicationcontext context = new annotationconfigapplicationcontext(appconfig.class);
	    helloworld obj = (helloworld) context.getbean("hellobean");
	    
	    obj.printhelloworld("spring java config");

	}
}

输出结果

hello : spring java config