• 1,類中的無參建構函式建立物件（最常用的方式）
  spring配置檔案

<bean id = "person" class="com.wjk.spring.test.beans.xml.Person"/>

java類檔案

public class Person {
    public void sys() {
        System.out.println("com.wjk.spring.test.beans.xml.Person:sys");
    }
}

測試類的測試方法

public void SpringBeansTestFactory() {
        ApplicationContext beans = new
 
 ClassPathXmlApplicationContext("spring_context_test.xml");  
        Person person = (Person) beans.getBean("person");
        person.sys();
}

• 2,靜態工廠建立物件 （建立靜態的方法，返回類物件）
  靜態工廠類

public class SpringBeanStaticFactory {
    public static Person getPerson() {
        return new Person();
    }
}

spring 配置檔案bean的配置

<bean id = "staticPersonFactory" class="com.wjk.spring.test.beans.xml.SpringBeanStaticFactory" factory-method="getPerson"/>

測試類中的測試方法

public void SpringBeansTestFactory() {
        ApplicationContext beans = new ClassPathXmlApplicationContext("spring_context_test.xml");  
        Person staticPersonFactory= (Person) beans.getBean("staticPersonFactory"
 
);
        staticPersonFactory.sys();
}

• 3,預設的無參建構函式 （建立不是靜態的方法，返回類物件）
  spring 配置檔案

<bean id = "personFactory" class="com.wjk.spring.test.beans.xml.SpringBeanFactory"/>
    <bean id = "person1" factory-bean="personFactory" factory-method="getPerson"/>

例項工廠類檔案

public class SpringBeanFactory {
    public Person getPerson() {
        return new Person();
    }
}

測試類

public void SpringBeansTestFactory() {
        ApplicationContext beans = new ClassPathXmlApplicationContext("spring_context_test.xml");  
        Person person1 = (Person) beans.getBean("person1");
        person1.sys();
    }’