Spring自动装配bean属性

标签：spring

一：常用模式

二：案例byName

1.案例截图

2.基本代码

package com.cloud.autowire;

public classDog {

   private String name;

   private int age;

   public String getName() {

      return name;

   }

   public void setName(String name) {

      this.name = name;

   }

   public int getAge() {

      return age;

   }

   public void setAge(int age) {

      this.age = age;

   }

}

package com.cloud.autowire;

public classMaster {

   private String name;

   private Dog dog;

   public String getName() {

      return name;

   }

   public void setName(String name) {

      this.name = name;

   }

   public Dog getDog() {

      returndog;

   }

   public void setDog(Dog dog) {

      this.dog = dog;

   }

}

3.配置代码

<?xml version="1.0" encoding="utf-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
<!-- 配置一个Master对象 -->
<!-- autowire="byName"配置自动装配属性 -->
<!-- 原理：在Master里面有一个dog属性没有配置， 使用byName之后就会在下面配置的属性里面寻找dog属性，
一旦找到就会自动装配-->
<bean id="master" class="com.cloud.auto.Master" autowire="byName">
<property name="name">
<value>Spring</value>
</property>
</bean>
<!-- 配置一个Dog对象 -->
<bean id="dog" class="com.cloud.auto.Dog">
<property name="name" value="小白"/>
<property name="age" value="10"/>
</bean>
</beans>

4.测试代码

package com.cloud.auto;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Test {
public static void main(String[] args) {
ApplicationContext ac=new ClassPathXmlApplicationContext("com/cloud/auto/beans.xml");
Master master=(Master) ac.getBean("master");
System.out.println(master.getName()+"养的狗叫："+master.getDog().getName());
}
}

Spring自动装配bean属性

标签：spring

原文地址：http://blog.csdn.net/dzy21/article/details/48085981