Spring Learning -2-spring IOC container

Role: Creating Objects & Working with Object dependencies

How the container creates objects

1) Call parameterless constructor

    class= "Com.cx.createObj.User" ></bean>

2) with parametric constructor

class= "Com.cx.createObj.User" >        <constructor-arg index= "0" type= "int" value= "></" constructor-arg>        <constructor-arg index= "1" type= "java.lang.String" value= "Jack" ></ Constructor-arg></bean>

<!--defines a string value when mike-->

<bean id= "str" class= "java.lang.String" >
    <constructor-arg value= "Mike" ></constructor-arg>
</bean>

<bean id= "user" class= "Com.cx.createObj.User" >

    <constructor-arg index= "0" type= "int" value= "></constructor-arg>"
    <constructor-arg index= "1" type= "java.lang.String" ref= "str" ></constructor-arg>

</bean>

3) factory-created objects

Factory class, non-static method to create an object

    <!--Create Factory--    class= "Com.cx.createObj.ObjectFactory" ></bean>    <bean id= "User" Factory-bean= "Factory" factory-method= "getinstance" ></bean>

Factory class, static method Create object

    <!--static Method--    class= "Com.cx.createObj.ObjectFactory" factory-method= "Getstaticinstance" > </bean>

User entity class

 PackageCOM.CX.CREATEOBJ;/*** Created by Cxspace on 16-8-6.*/ Public classUser {Private intID; PrivateString name;  PublicUser () {System.out.println ("----Call no parameter construction method----"); }     PublicUser (intID, String name) {         This. ID =ID;  This. Name =name; System.out.println ("----Call with parameter constructor----"); }     Public intgetId () {returnID; }     Public voidSetId (intID) { This. ID =ID; }     PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; } @Override PublicString toString () {return"user{" + "id=" + ID + ", name= '" + name + ' \ ' + '} '; }     Public voidInit_user () {System.out.println ("After creating the object, initialize the"); }     Public voidDestroy_user () {System.out.println ("IOC container destruction, user Object Recycling"); }}

Factory class

 PackageCOM.CX.CREATEOBJ;/*** Created by Cxspace on 16-8-6.*/ Public classObjectfactory {//instance method to create an object     PublicUser getinstance () {return NewUser (101, "factory: Invoke instance method"); }    //static methods to create objects     Public StaticUser getstaticinstance () {return NewUser (100, "Factory: Call static Method"); }}

Spring Learning -2-spring IOC container