版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/tangyaliang11/article/details/79216050
请注意,是通过工厂注入bean,而不是注入工厂。
applicationContext.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:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd">
<!-- 静态工厂 -->
<bean id="person" class="tang.StaticFactory" factory-method="getPerson">
<constructor-arg name="name" value="tangxiansheng"></constructor-arg>
<constructor-arg name="age" value="19"></constructor-arg>
</bean>
<!-- 实例工厂 -->
<bean id="instanceFactory" class="tang.InstanceFactory"></bean>
<!-- 引用实例工厂 factory-bean指定实例工厂,factory-method指定工厂中方法 -->
<bean id="person1" class="tang.Person" factory-bean="instanceFactory" factory-method="getPerson">
<constructor-arg name="name" value="tangmouren"></constructor-arg>
<constructor-arg name="age" value="20"></constructor-arg>
</bean>
</beans>
TestClass
public static void main(String[] args){
ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
Person person = ac.getBean("person",Person.class);
System.out.println(person);
Person person1 = ac.getBean("person1",Person.class);
System.out.println(person1);
}
class bean
实例工厂
package tang;
public class InstanceFactory {
public Person getPerson(String name, Integer age){
return new Person(name, age);
}
}
静态工厂
package tang;
public class StaticFactory {
public static Person getPerson(String name,Integer age){
return new Person(name,age);
}
}
实体
package tang;
public class Person {
private String name;
private Integer age;
public Person() {
System.out.println("person");
}
public Person(String name, Integer age) {
super();
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "Person [name=" + name + ", age=" + age + "]";
}
}
输出
Person [name=tangxiansheng, age=19, car=null]
Person [name=tangmouren, age=20, car=null]