Spring系列【2】应用setter注入法实现Bean的注入

package cn.com.xf;

public class User {
    private String name;
    private int age;
    private String remark;

　　//省略属性的getter/setter方法

    @Override
    public String toString() {
        return "User [name=" + name + ", age=" + age + ", remark=" + remark
                + "]";
    }
}

package cn.com.xf;

public class UserUtil {
    private User user;
    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public boolean isUser() {
        if (user != null) {
            return true;
        } else {
            return false;
        }
    }

}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    <!--注意，以下使用了P标签-->
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="user" class="cn.com.xf.User" p:name="jikoy" p:age="28" p:remark="this is remark"></bean>
    <bean id="userUtil" class="cn.com.xf.UserUtil">
        <property name="user" ref="user"></property>
    </bean>
</beans>

package cn.com.xf;

import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {

    public static void main(String[] args) {
　　　　 //ApplicationContext接口没有提供关闭方法,eclipse会提示,故改为它的子接口
        ConfigurableApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
        User user=(User) ctx.getBean("user");
        ctx.close();
        System.out.println(user);
    }

}