Java Framework Spring Boot learning Note (11): Bean Management (Annotation and configuration file mix)

Configuration files and annotations mixed use

• Create object operations using the configuration file method
• The operation of the injected attribute is implemented using annotations

Writing Bookdao.java and Orderdao.java files

Bookdao.java

1  Package com.example.spring; 2 3  Public class Bookdao {4      Public void Book () {5         System.out.println ("book Dao.") ); 6     }7 }

Orderdao.java

1  Package com.example.spring; 2 3  Public class Orderdao {4      Public void order () {5         System.out.println ("Order Dao.") ); 6     }7 }

Create object operations using the configuration file method

Writing a configuration file Beans.xml

1 <?XML version= "1.0" encoding= "UTF-8"?>2 <Beansxmlns= "Http://www.springframework.org/schema/beans"3 Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"4 Xmlns:context= "Http://www.springframework.org/schema/context"5 xsi:schemalocation= "Http://www.springframework.org/schema/beans6 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd7 Http://www.springframework.org/schema/context8 http://www.springframework.org/schema/context/spring-context-3.0.xsd ">9 Ten     <!--turn on the annotation scan, in the package scan class, method, property above whether there are annotations - One     <Context:component-scanBase-package= "Com.example.spring"></Context:component-scan> A  -     <!--to create an object in a configuration file - -     <BeanID= "Bookservice"class= "Com.example.spring.BookService"></Bean> the     <BeanID= "Bookdao"class= "Com.example.spring.BookDao"></Bean> -     <BeanID= "Orderdao"class= "Com.example.spring.OrderDao"></Bean> -  - </Beans>

The operation of the injected attribute is implemented using annotations

Writing Bookservice.java

1  Packagecom.example.spring;2 3 ImportJavax.annotation.Resource;4 5  Public classBookservice {6     //annotation method to inject the property, get the object7    @Resource (name = "Bookdao") 8     PrivateBookdao Bookdao;9 Ten     @Resource (name = "Orderdao")  One     PrivateOrderdao Orderdao; A  -      Public voidService () { -System.out.println ("book Service.")); the         //Calling Methods - Bookdao.book (); - Orderdao.order (); -     } +}

Writing Application.java

1  Packagecom.example.spring;2 3 ImportOrg.springframework.context.support.AbstractApplicationContext;4 ImportOrg.springframework.context.support.ClassPathXmlApplicationContext;5 6  Public classApplication {7      Public Static voidMain (string[] args) {8         //Where the bean configuration file is located d:\\ideaprojects\\spring\\src\\beans.xml9         //using the Abstractapplicationcontext containerTenAbstractapplicationcontext context =NewClasspathxmlapplicationcontext ("File:d:\\ideaprojects\\spring\\src\\beans.xml"); One         //get configuration-created objects ABookservice Bookservice = (bookservice) context.getbean ("Bookservice"); - Bookservice.service (); -     } the}

Run output

Book Service.book Dao.order Dao.

Java Framework Spring Boot learning Note (11): Bean Management (Annotation and configuration file mix)