Spring依赖关系配置(续)

四、注入方法返回值
<?xml version="1.0" encoding="gb2312"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <bean id="valueGenerrator" class="prolove.ValueGenerator"/>
    <bean id="son5" class="prolove.Son">
        <property name="age">
            <bean class="org.springframework.beans.factory.config.
                MethodInvokingFactoryBean">
                <property name="targetObject">
                    <ref local="valueGenerator">
                </property>
                <property name="targetMethod">
                    <value>getValue</value>
                </property>
            </bean>
        </property>
    </bean>
</beans>

public class ValueGenerator
...{
    public int getValue() ...{
        return 2;
    }
    public static int getStaticValue() ...{
        return 9;
    }
}

public class SpringTest
...{
    public static void main(String[] args) ...{
        ApplicationContext ctx =
            new FileSystemXmlApplicationContext("bean.xml");
        Son son5 = (Son)ctx.getBean("son5");
        System.out.println("系统获取的son5的属性值：" + son5.getAge());
    }
}
执行结果如下：
[java]系统获取的son5的属性值：2

<?xml version="1.0" encoding="gb2312"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <bean id="valueGenerrator" class="prolove.ValueGenerator"/>
    <bean id="son4" class="prolove.Son">
        <property name="age">

            <bean class="org.springframework.beans.factory.config.
                MethodInvokingFactoryBean">
                <property name="targetClass">
                    <value>prolove.ValueGenerator</value>
                </property>
                <property name="targetMethod">
                    <value>getStaticValue</value>
                </property>
            </bean>

        </property>
    </bean>
</beans>

Son son4 = (Son)ctx.getBean("son4");
System.out.println("系统获取的son4的属性值：" + son4.getStaticAge());
执行结果如下：
[java]系统获取的son4的属性值：9

<!--将静态方法返回值直接定义成bean-->
<bean id="sysProps" class="org.springframework.beans.factory.config.
    MethodInvokingFactoryBean">
    <property name="targetClass">
        <value>java.lang.System</value>
    </property>
    <property name="targetMethod">
        <value>getProperties</value>
    </property>
</bean>

<bean id="javaVersion" class="org.springframework.beans.factory.config.
    MethodInvokingFactoryBean">
    <property name="targetObject"><ref local="sysProps"></property>
    <property name="targetMethod"><value>getProperty</value></property>
    <property name="arguments">
        <list>
            <value>java.version</value>
        </list>
    </property>
</bean>

System.out.println("系统获取Java版本：" + ctx.getBean("javaVersion"));
执行结果如下：
[java]系统获取Java版本：1.5.0_14

<bean id="myBean" class="org.springframework.beans.factory.config.
    MethodInvokingFactoryBean">
    <property name="staticMethod">
        <value>prolove.MyClassFactory.getInstance</value>
    </property>
</bean>

五、强制初始化bean
<bean id="beanOne" class="ExampleBean" depends-on="manager">
    <property name="manager"><ref local="manager"/></property>
</bean>
<bean id="manager" class="ManagerBean"/>

六、自动装配
1.byName规则
<?xml versin="1.0" encoding="gb2312"?>
<!DOCTYPE beans PUBLIC"-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <bean id="chinese" class="prolove.Chinese" autowire="byName"/>
    <bean id="gundog" class="prolove.Gungod">
        <property name="name">
            <value>wangwang</value>
        </property>
    </bean>
</beans>

public void setGunDog(Dog dog) ...{
    this.dog = dog;
}

2.byType规则
<?xml versin="1.0" encoding="gb2312"?>
<!DOCTYPE beans PUBLIC"-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <bean id="chinese" class="prolove.Chinese" autowire="byType"/>
    <bean id="gundog" class="prolove.Gundog">
        <property name="name">
            <value>wangwang</value>
        </property>
    </bean>
</beans>

public void setDog(Dog dog) ...{
    this.dog = dog;
}

下面则不行-->
<?xml versin="1.0" encoding="gb2312"?>
<!DOCTYPE beans PUBLIC"-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <bean id="chinese" class="prolove.Chinese" autowire="byType"/>
    <bean id="gundog" class="prolove.Gundog">
        <property name="name">
            <value>wangwang</value>
        </property>
    </bean>
    <bean id="petdog" class="prolove.Petdog">
        <property name="name">
            <value>ohoh</value>
        </property>
    </bean>
</beans>

<?xml versin="1.0" encoding="gb2312"?>
<!DOCTYPE beans PUBLIC"-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <bean id="chinese" class="prolove.Chinese" autowire="byNme">
        <property name="Gundog">
            <ref local="petdog"/>
        </property>
    </bean>
    <bean id="gundog" class="prolove.Gundog">
        <property name="name">
            <value>wangwang</value>
        </property>
    </bean>
    <bean id="petdog" class="prolove.Petdog">
        <property name="name">
            <value>ohoh</value>
        </property>
    </bean>
</beans>

七、依赖检查
public class Chinese implements Person ...{
    private Axe axe;
    private int age = 0;
    public Chinese() ...{
        System.out.println("Spring实例化主调Bean:Chinese实例...");
    }
    //依赖注入Axe必需的setter方法
    public void setAxe(Axe axe) ...{
        this.axe = axe;
    }
    public void setAge(int age) ...{
        this.age = age;
    }
    //测试用方法
    public void useAxe() ...{
        System.out.println(axe.chop() + " 此人年龄为： " + age);
    }
}
<?xml versin="1.0" encoding="gb2312"?>
<!DOCTYPE beans PUBLIC"-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <bean id="steelAxe" class="prolove.SteelAxe"/>
    <bean id="chinese" class="prolove.Chinese" dependency-check="all">
        <property name="axe">
            <ref local="steelAxe"/>
        </property>
    </bean>
</beans>