spring开发_注入其他Bean的方法返回值_MethodInvokingFactoryBean

 1 package com.b510.app.test;
 2 
 3 import org.springframework.context.ApplicationContext;
 4 import org.springframework.context.support.ClassPathXmlApplicationContext;
 5 
 6 import com.b510.service.AnimalService;
 7 
 8 public class SpringTest {
 9     public static void main(String[] args) {
10         ApplicationContext act=new ClassPathXmlApplicationContext("beans.xml");
11         //dogServiceBean是通过普通方法，获取到值
12         AnimalService dogServiceBean=(AnimalService) act.getBean("dog1");
13         System.out.println("获取dog1的年龄为:"+dogServiceBean.getAge());
14         //dogServiceBean2是通过静态方法，获取到值
15         AnimalService dogServiceBean2=(AnimalService) act.getBean("dog2");
16         System.out.println("获取dog2的年龄为:"+dogServiceBean2.getAge());
17         //javaVersion=sysProps.getProperty("java.version");
18         String info=(String) act.getBean("javaVersion");
19         System.out.println("系统的java版本是:"+info);
20     }
21 }

 1 package com.b510.app.util;
 2 
 3 /**
 4  * 值的生产者
 5  * 
 6  * @author Hongten
 7  * 
 8  */
 9 public class ValueGenerator {
10 
11     /**
12      * 定义一个普通的方法，获取年龄
13      * 
14      * @return 返回一个int类型的值
15 */
16     public int getAgeValue() {
17         return 23;
18     }
19 
20     /**
21      * 定义一个静态方法，获取年龄
22      * 
23      * @return 返回一个int类型的值
24 */
25     public static int getAgeStaticValue() {
26         return 20;
27     }
28 }

 1 package com.b510.service;
 2 
 3 public interface AnimalService {
 4 
 5     /**
 6      * 定义一个抽象方法setAge
 7      * 
 8      * @param age
 9      *            年龄
10 */
11     public abstract void setAge(int age);
12 
13     /**
14      * 定义一个抽象方法getAge
15      * 
16      * @return 一个int类型的值
17 */
18     public abstract int getAge();
19 
20 }

 1 package com.b510.service.impl;
 2 
 3 import com.b510.service.AnimalService;
 4 
 5 /**
 6  * 定义DogServiceBean类
 7  * 
 8  * @author Hongten
 9  * 
10  */
11 public class DogServiceBean implements AnimalService {
12     /**
13      * 年龄
14 */
15     private int age;
16 
17     public int getAge() {
18         return age;
19     }
20 
21     public void setAge(int age) {
22         this.age = age;
23     }
24 
25 }

 1 <?xml version="1.0" encoding="GBK"?>
 2     <!-- Spring配置文件的根元素，使用spring-beans-3.0.xsd语义约束 -->
 3 <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns="http://www.springframework.org/schema/beans"
 5     xsi:schemaLocation="http://www.springframework.org/schema/beans
 6     http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
 7     <!-- 定义目标Bean，后面将会获取该Bean的方法返回值 -->
 8     <bean id="valueGenerator" class="com.b510.app.util.ValueGenerator"></bean>
 9     <!-- 定义dog1的bean -->
10     <bean id="dog1" class="com.b510.service.impl.DogServiceBean">
11         <property name="age">
12             <bean
13                 class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
14                 <!-- targetObject确定目标Bean，指定调用哪个Bean -->
15                 <property name="targetObject" ref="valueGenerator" />
16                 <!-- targetMethod确定目标方法，指定调用目标Bean的哪个方法 -->
17                 <property name="targetMethod" value="getAgeValue" />
18             </bean>
19         </property>
20     </bean>
21     <!-- 定义名为dog2的Bean -->
22     <bean id="dog2" class="com.b510.service.impl.DogServiceBean">
23         <property name="age">
24             <bean
25                 class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
26                 <!-- targetClass确定目标类，指定调用哪个类 -->
27                 <property name="targetClass" value="com.b510.app.util.ValueGenerator" />
28                 <!-- targetMethod确定目标方法，指定调用目标class的哪个方法。 
29                     该方法必须是静态方法-->
30                 <property name="targetMethod" value="getAgeStaticValue"></property>
31             </bean>
32         </property>
33     </bean>
34 
35 
36     <!--  将静态方法返回值直接定义成Bean -->
37     <bean id="sysProps"
38         class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
39         <!-- targetClass确定目标类，确定调用哪个类 -->
40         <property name="targetClass" value="java.lang.System" />
41         <!-- targetMethod确定目标方法，确定调用目标class的哪个方法 
42             该方法必须是静态方法-->
43         <property name="targetMethod" value="getProperties" />
44     </bean>
45     <!-- 将实例方法返回值直接定义成Bean -->
46     <bean id="javaVersion"
47         class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
48         <!-- targetObject确定目标Bean，确定调用哪个Bean -->
49         <property name="targetObject" ref="sysProps" />
50         <!-- targetMethod确定目标方法，确定调用目标Bean的哪个方法 -->
51         <property name="targetMethod" value="getProperty" />
52         <!-- 确定调用目标方法的参数 -->
53         <property name="arguments">
54             <!-- list元素列出调用方法多个参数值 -->
55             <list>
56                 <value>java.version</value>
57             </list>
58         </property>
59     </bean>
60 </beans>

 1 2012-3-12 12:12:51 org.springframework.context.support.AbstractApplicationContext prepareRefresh
 2 信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1a05308: display name [org.springframework.context.support.ClassPathXmlApplicationContext@1a05308]; startup date [Mon Mar 12 12:12:51 CST 2012]; root of context hierarchy
 3 2012-3-12 12:12:51 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
 4 信息: Loading XML bean definitions from class path resource [beans.xml]
 5 2012-3-12 12:12:54 org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
 6 信息: Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@1a05308]: org.springframework.beans.factory.support.DefaultListableBeanFactory@bfc8e0
 7 2012-3-12 12:12:54 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
 8 信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@bfc8e0: defining beans [valueGenerator,dog1,dog2,sysProps,javaVersion]; root of factory hierarchy
 9 获取dog1的年龄为:23
10 获取dog2的年龄为:20
11 系统的java版本是:1.6.0_22