The meaning of Springioc and di

Meaning of springioc and DI :

Full interface-oriented programming is achieved.

Document Case

MVC Case

Document Case - Dependency Injection using construction methods

Interface

public interface Document {void read (); void write ();}

Implementation Class 1

public class Worddocument implements Document {public void read () {System.out.println ("word read");    } public void Write () {System.out.println ("word writer"); }}

Implementation Class 2

public class Pdfdocument implements Document {public void read () {System.out.println ("pdf read");    } public void Write () {System.out.println ("pdf write"); }}

Tool class

public class Documentmanager {public document document;    Public Documentmanager (document document) {this.document = document;    } public void Read () {document.read ();    } public void Write () {document.write (); }}

Test

public class Test1 {@Test public void test1 () {ApplicationContext context = new Classpathxmlapplicationcont        Ext ("Applicationcontext.xml");        Documentmanager manager = (Documentmanager) context.getbean ("Documentmanager");        Manager.read ();    Manager.write (); }}

Spring configuration file Applicationcontext.xml

<bean id= "Documentmanager" class= "spring_ioc_di_document. Documentmanager "><constructor-arg index=" 0 "ref=" pdfdocument "></constructor-arg></bean>< Bean id= "worddocument" class= "spring_ioc_di_document. Worddocument "></bean><bean id=" pdfdocument "class=" spring_ioc_di_document. Pdfdocument "></bean>

MVC case-Using Set mode dependency Injection

DAO interface

Public interface Persondao {public void read ();

DAO Implementation

public class Persondaoimpl implements Persondao {public void read () {System.out.println ("Persondao read"); }}

Service Interface

Public interface Personservice {public void read ();

Service Implementation

public class Personserviceimpl implements personservice{Persondao Persondao;    Public Persondao Getpersondao () {return persondao;    } public void Setpersondao (Persondao persondao) {This.persondao = Persondao;    } @Override public void Read () {persondao.read (); }}

Test

public class Test2 {@Test public void test2 () {ApplicationContext context = new Classpathxmlapplicationcontext ("        Applicationcontext.xml ");        Personaction action = (personaction) context.getbean ("Personaction");    Action.read (); }}

Spring configuration file Applicationcontext.xml

<bean id= "Persondao" class= "SPRING_MVC. Persondaoimpl "></bean> <bean id=" Personservice "class=" SPRING_MVC. Personserviceimpl "><property name=" Persondao "><ref bean=" Persondao "/></property><bean id= "Personaction" class= "SPRING_MVC. Personaction "><property name=" service "><ref bean=" Personservice "/></property></bean>

The meaning of Springioc and di