Setter 办法输出
实体类 Rumenz.java/Holder.java
package com.rumenz;
public class Rumenz {
private Integer id;
private String name;
public Integer getId() {return id;}
public void setId(Integer id) {this.id = id;}
public String getName() {return name;}
public void setName(String name) {this.name = name;}
}
package com.rumenz;
public class Holder {
private Rumenz rumenz;
public Rumenz getRumenz() {return rumenz;}
public void setRumenz(Rumenz rumenz) {this.rumenz = rumenz;}
}
手动输出形式
- XML 资源配置元信息
配置 Beans.xml 文件
<?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 https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd">
<bean id="rumenz" class="com.rumenz.Rumenz">
<property name="id" value="123"/>
<property name="name" value="入门小站"/>
</bean>
<bean id="holder" class="com.rumenz.Holder">
<property name="rumenz" ref="rumenz"/>
</bean>
</beans>
调用
package com.rumenz;
public class DemoApplication {public static void main(String[] args) {DefaultListableBeanFactory db=new DefaultListableBeanFactory();
XmlBeanDefinitionReader xr=new XmlBeanDefinitionReader(db);
xr.loadBeanDefinitions("Beans.xml");
Holder bean = db.getBean(Holder.class);
System.out.println(bean.getRumenz().getName());
}
}
- Java 注解配置元信息
配置文件 Beans.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 https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd">
<bean id="rumenz" class="com.rumenz.Rumenz">
<property name="id" value="123"/>
<property name="name" value="入门小站"/>
</bean>
</beans>
调用
package com.rumenz;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
public class DemoApplication {public static void main(String[] args) {AnnotationConfigApplicationContext ac=new AnnotationConfigApplicationContext();
XmlBeanDefinitionReader xr=new XmlBeanDefinitionReader(ac);
xr.loadBeanDefinitions("Beans.xml");
ac.register(DemoApplication.class);
ac.refresh();
Holder bean = ac.getBean(Holder.class);
System.out.println(bean.getRumenz().getName());
ac.close();}
@Bean
public Holder holder(Rumenz rumenz){Holder h=new Holder();
h.setRumenz(rumenz);
return h;
}
}
- API 配置元信息
配置文件 Beans.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 https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd">
<bean id="rumenz" class="com.rumenz.Rumenz">
<property name="id" value="123"/>
<property name="name" value="入门小站"/>
</bean>
</beans>
调用
package com.rumenz;
ramework.context.annotation.Bean;
public class DemoApplication {public static void main(String[] args) {AnnotationConfigApplicationContext ac=new AnnotationConfigApplicationContext();
BeanDefinition beanDefinition=createBeanDefinition();
ac.registerBeanDefinition("holder",beanDefinition);
XmlBeanDefinitionReader xr=new XmlBeanDefinitionReader(ac);
xr.loadBeanDefinitions("Beans.xml");
ac.register(DemoApplication.class);
ac.refresh();
Holder bean = ac.getBean(Holder.class);
System.out.println(bean.getRumenz().getName());
ac.close();}
private static BeanDefinition createBeanDefinition() {BeanDefinitionBuilder beanDefinitionBuilder=BeanDefinitionBuilder.genericBeanDefinition(Holder.class);
beanDefinitionBuilder.addPropertyReference("rumenz","rumenz");
return beanDefinitionBuilder.getBeanDefinition();}
}
主动模式注入
- byType
配置文件 Beans.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 https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd">
<bean id="rumenz" class="com.rumenz.Rumenz">
<property name="id" value="123"/>
<property name="name" value="入门小站"/>
</bean>
<bean id="holder" class="com.rumenz.Holder" autowire="byType">
</bean>
</beans>
调用
package com.rumenz;
public class DemoApplication {public static void main(String[] args) {DefaultListableBeanFactory db=new DefaultListableBeanFactory();
XmlBeanDefinitionReader xr=new XmlBeanDefinitionReader(db);
xr.loadBeanDefinitions("Beans.xml");
Holder bean = db.getBean(Holder.class);
System.out.println(bean.getRumenz().getName());
}
}
- byName
配置文件 Beans.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 https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd">
<bean id="rumenz" class="com.rumenz.Rumenz">
<property name="id" value="123"/>
<property name="name" value="入门小站"/>
</bean>
<bean id="holder" class="com.rumenz.Holder" autowire="byName">
</bean>
</beans>
调用
package com.rumenz;
public class DemoApplication {public static void main(String[] args) {DefaultListableBeanFactory db=new DefaultListableBeanFactory();
XmlBeanDefinitionReader xr=new XmlBeanDefinitionReader(db);
xr.loadBeanDefinitions("Beans.xml");
Holder bean = db.getBean(Holder.class);
System.out.println(bean.getRumenz().getName());
}
}
原文: https://rumenz.com/rumenbiji/spring-setter-injection.html