Spring in Action (third edition) reading notes

Chapter One Spring Tour

Pojo:plain old Java object Simple Java objects

Di:dependency Injection Dependency Injection

Constructor injection: passed in as a constructor parameter at construction time

Private Quest Quest;  Public braveknight (Quest Quest) {    this. Quest = Quest;} 

Where quest is an interface used to achieve loose coupling .

You can use mock implementations when testing. As follows:

Quest mockquest = mock (Quest.  Classnew braveknight (mockquest);

Assemble wiring: Create collaborative behavior between components.

XML Configuration Assembly

<id= "Quest"  class= "Test." Slaydragonquest "/><id=" Knight "  class= "Test. Braveknight ">    <ref=" quest "/>  </bean>

Load a bean's definition by applying context (application context)

New Classpathxmlapplicationcontext ("Knight.xml"= (Knight) Context.getbean ("Knight");

Aop:aspect-oriented Programming Application slice programming-separates into reusable components.

Spring container: Bean factories, simplest container

Application Context: Provides application-oriented services based on bean factories.

XML file under the classpathxmlapplicationcontext--class path

filesystemxmlapplicationcontext--an XML file under an absolute path

XML files under the Xmlwebapplicationcontext--web application

Spring Framework (classified as miscellaneous, common as below)

1. AOP Modules

2. DAO module (data Access Object)

Orm:object-relational Mapping Object Relational mapping

Map relational data in relational databases to objects in a program.

3. Web Module

4. Spring MVC

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Chapter II Assembly Bean

Constructor injection

<id= "Duke"  class= "Test." Duke ">    <value="/>"<!--  Note If you inject another bean, you need ref, not value-</bean>

Creating beans from engineering methods

--You can configure a class with no public constructors as a bean

<id= "Singleton"  class= "Test." Singleton "factory-method=" getinstance"/>

Scope of the Bean

Singleton (default) A bean definition corresponds to an object instance in each spring IOC container.

prototype A bean definition corresponds to multiple object instances.

request in an HTTP request, a bean definition corresponds to an instance, that is, each HTTP request will have its own bean instance, which is created from a bean definition. This scope is valid only in the Web-based spring ApplicationContext scenario.

session in an HTTP Session , a bean definition corresponds to an instance. This scope is valid only in the Web-based spring ApplicationContext scenario.

global-session in a global HTTP Session , a bean definition corresponds to an instance. Typically, this is only valid when using the Portlet context. This scope is valid only in the Web-based spring ApplicationContext scenario.

Spring in Action (third edition) reading notes