五、Spring Configuration Using XML

 

Spring Configuration Using XML - 章节

 

用XML配置是：

第一种方法
更简单的
关注点分离

 

applicationContext.xml

Name doesn't matter
Spring Context sort of a HashMap
Can simply be a registry
XML configuration begins with this file
Namespaces aid in configuration/validation

 

名称空间

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/
beans http://www.springframework.org/schema/beans/spring-
beans.xsd">

 

copy project

XML Declaration

Beans
Essentially classes
Replaces keyword new
Define class, use interface

Add Bean

Setter Injection

Constructor Injection

Guaranteed contract
Constructor defined
Used together
Index-based

Autowire

Spring automatically wires beans
byType
byName
constructor
no

byType

byName

 

总结：

applicationContext.xml
Bean definition
Setter injection
Constructor injection
Autowiring