spring第二个示例

1 声明接口类

package com.gc.inter;

public interface Hello {

    /**
     * Add By ZJY
     *
     * @return 输出问侯语 2016年2月17日
     */
    public String doSalutation();
}

2 声明实体类

package com.gc.action;

import com.gc.inter.Hello;

public class ChHello implements Hello {
    public String msg = null;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    /*
     * 实现接口方法
     */
    public String doSalutation() {
        return "你好" + this.msg;
    }
}

package com.gc.action;

import com.gc.inter.Hello;

public class EnHello implements Hello {
    public String msg = null;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    /*
     * 实现接口方法
     */
    public String doSalutation() {
        return "hello" + this.msg;
    }
}

3 调用

package com.gc.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

import com.gc.action.HelloWorld;
import com.gc.inter.Hello;
public class TestHelloWorld {
    public static void main(String[] args) {
        @SuppressWarnings("resource")
        ApplicationContext actx = new FileSystemXmlApplicationContext("config.xml");
        Hello hello=(Hello)actx.getBean("HelloWorld");
        System.out.println(hello.doSalutation());
    }
}

4 xml配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <!-- 定义一个bean id表示唯一一个bean class表示bean的来源 -->
    <bean id="HelloWorld" class="com.gc.action.EnHello">
        <!-- 将其变量msg通过依赖注入 -->
        <property name="msg">
            <value>ch</value>
        </property>
    </bean>
</beans>

实现spring的IoC(反向控制 )