IOC容器實例化對象的幾種方式：

• 調(diào)用無參構(gòu)造
• 調(diào)用有參構(gòu)造
• 調(diào)用其他對象構(gòu)造
• 調(diào)用工廠類靜態(tài)方法
• 調(diào)用工廠類非靜態(tài)方法
  下面上代碼：
  applicationConfig.xml:

<?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"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
                http://www.springframework.org/schema/beans/spring-beans.xsd
                http://www.springframework.org/schema/context
                http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 無參調(diào)用 -->
    <!-- <bean id="user" class="com.iotek.first.User"></bean> -->
    
    <!-- 帶參調(diào)用 -->
    <!-- <bean id="user2" class="com.iotek.first.User">
        <constructor-arg value="101"></constructor-arg>
        <constructor-arg value="Tom"></constructor-arg>
    </bean> -->
    
    <!-- 調(diào)用其他對象 -->
    <!-- <bean id="name" class="java.lang.String">
        <constructor-arg value="Jack"></constructor-arg>
    </bean>
    
    <bean id="user3" class="com.iotek.first.User">
        <constructor-arg type="java.lang.String" ref="name" index="1"></constructor-arg>
        <constructor-arg value="102" type="int" index="0"></constructor-arg>
    </bean> -->
    
    <!-- 調(diào)用工廠類的靜態(tài)方法 -->
    <!-- <bean id="UserFactory" class="com.iotek.first.UserFactory">
    
    </bean>
    <bean id="user" factory-bean="UserFactory" factory-method="getUser"></bean> -->
    
    <!-- 調(diào)用工廠類的實例方法 -->
    
    <bean id="UserFactory" class="com.iotek.first.UserFactory"></bean>
    <bean id="user" class="com.iotek.first.UserFactory" factory-method="getStaticUser"></bean>
</beans>