类文件Spring中空值的写法-java教程

查了好多资料,发现还是不全,干脆自己整理吧,至少保证在我的做法正确的,以免误导读者,也是给自己做个记录吧!

    1、Member类

package www.csdn.spring1.dao;



public class Member {



	private String name;

	private Dept dept;

	public void setName(String name) {

		this.name = name;

	}

	public void setDept(Dept dept) {

		this.dept = dept;

	}

	@Override

	public String toString() {

		return "Member [name=" + name + ", dept=" + dept + "]";

	}

	

}

    
2、Dept类

package www.csdn.spring1.dao;



public class Dept {



	private String name;

	private String deptno;

	public void setName(String name) {

		this.name = name;

	}

	public void setDeptno(String deptno) {

		this.deptno = deptno;

	}

	

}

    
3、xml文件

    每日一道理
毅力,是千里大堤一沙一石的凝聚,一点点地累积,才有前不见头后不见尾的壮丽;毅力,是春蚕吐丝一缕一缕的环绕,一丝丝地坚持,才有破茧而出重见光明的辉煌; 毅力,是远航的船的帆,有了帆,船才可以到达成功的彼岸。
<?xml version="1.0" encoding="UTF-8"?>

<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.xsd">

      



   <bean id="member" class="www.csdn.spring1.dao.Member">

   	<property name="name">

   		<null/>

   	</property>

   	<property name="dept">

   		<null/>

   	</property>

   </bean>

    

</beans>

    
4、测试类

package www.csdn.spring1.test;



import org.junit.Test;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;



import www.csdn.spring1.dao.Member;



public class NullTest {



	@Test

	public void nullTest(){

		ApplicationContext context=new ClassPathXmlApplicationContext("classpath:spring-null.xml");

		Member m=context.getBean("member", Member.class);

		System.out.println(m.toString());

	}

}

    
 

文章结束给大家分享下程序员的一些笑话语录:  一边用着越狱的ip,一边拜乔帮主的果粉自以为是果粉,其实在乔帮主的眼里是不折不扣的叛徒。

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