Spring实战——获取其他Bean的属性值

￡神魔★判官ぃ 2021-07-25 02:24 382阅读 0赞

**一 配置**

<?xml version="1.0" encoding="GBK"?>
    <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://www.springframework.org/schema/beans"
         xmlns:util="http://www.springframework.org/schema/util"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
         http://www.springframework.org/schema/util
         http://www.springframework.org/schema/util/spring-util-4.0.xsd">
         
         <bean id="person" class="org.crazyit.app.service.Person">
               <property name="age" value="30"/>
               <property name="son">
                    
                    <bean class="org.crazyit.app.service.Son">
                         <property name="age" value="11" />
                    </bean>
               </property>
         </bean>
    
         
         <bean id="son1" class=
               "org.springframework.beans.factory.config.PropertyPathFactoryBean">
               
               <property name="targetBeanName" value="person"/>
               
               <property name="propertyPath" value="son"/>
         </bean>
         
    
         
         <bean id="son2" class="org.crazyit.app.service.Son">
               <property name="age">
                    
                    
                    <bean id="person.son.age" class=
                         "org.springframework.beans.factory.config.PropertyPathFactoryBean"/>
               </property>
         </bean>
         
    
         
         <bean id="theAge" class=
               "org.springframework.beans.factory.config.PropertyPathFactoryBean">
               
               <property name="targetBeanName" value="person"/>
               
               <property name="propertyPath" value="son.age"/>
         </bean>
         
    
         
         <bean id="theAge2" class=
               "org.springframework.beans.factory.config.PropertyPathFactoryBean">
               
               <property name="targetObject">
                    
                    <bean class="org.crazyit.app.service.Person">
                         <property name="age" value="30"/>
                    </bean>
               </property>
               
               <property name="propertyPath" value="age"/>
         </bean>
    </beans>

**二 Bean**

1 Person

package org.crazyit.app.service;
    
    public class Person
    {
         private int age;
         private Son son;
         // age的setter和getter方法
         public void setAge(int age)
         {
               this.age = age;
         }
         public int getAge()
         {
               return this.age;
         }
         // son的setter和getter方法
         public void setSon(Son son)
         {
               this.son = son;
         }
         public Son getSon()
         {
               return this.son;
         }
    }

2 Son

package org.crazyit.app.service;
    
    public class Son
    {
         private int age;
         // age的setter和getter方法
         public void setAge(int age)
         {
               this.age = age;
         }
         public int getAge()
         {
               return this.age;
         }
         public String toString()
         {
               return "Son[age=" + age + "]";
         }
    }

**三 测试类**

package lee;
    
    
    import org.springframework.context.*;
    import org.springframework.context.support.*;
    
    
    import org.crazyit.app.service.*;
    
    public class SpringTest
    {
        public static void main(String[] args)
        {
            ApplicationContext ctx = new
                ClassPathXmlApplicationContext("beans.xml");
            System.out.println("系统获取的son1："
                + ctx.getBean("son1"));
            System.out.println("系统获取son2："
                + ctx.getBean("son2"));
            System.out.println("系统获取theAge的值："
                + ctx.getBean("theAge"));
            System.out.println("系统获取theAge2的值："
                + ctx.getBean("theAge2"));
        }
    }

**四 测试结果**

系统获取的son1：Son[age=11]
    系统获取son2：Son[age=11]
    系统获取theAge的值：11
    系统获取theAge2的值：30