Example of dependency injection in Spring (USB devices and smart devices)

1, first write interface

Interface SmartDevice//Smart Device interface
{

public void SaveData (String data); Save Data side
Method

}

Interface USB//USB Interface
{
public void Insert ();
Public String read ();
public void Write (String s);
public void pop ();

}

2, and then build a specific class

public class computer implements SmartDevice
{
Private USB Usbdevice;
Public computer () {}//cannot construct USB device here
public void SaveData (String data)//Implement Smart setting
Method of Preparation
{
Insert,write,pop
}
Assembling a USB device to a computer
public void Setusbdevice (USB u) {usbdevice=u;}
}

public class Udisk implements USB//u disk
{

public void Insert () {...}
Public String Read () {...}
public void Write (String s) {...}
public void Pop () {...}

}

3. Final configuration

<?xml version= "1.0" encoding= "UTF-8"?>
<beans
Xmlns= "Http://www.springframework.org/schema/beans"
Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"
xmlns:p= "http://www.springframework.org/schema/p"
xsi:schemalocation= "Http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/ Spring-beans-3.0.xsd ">

<bean id= "theudisk" class= "com. Udisk "abstract=" false "
lazy-init= "Default" autowire= "Default" >
</bean>
<bean id= "Thecomputer" class= "Com.computer" abstract= "false"
lazy-init= "Default" autowire= "Default"
>
<property name= "Usbdevice" ref= "Theudisk"/>
</bean></beans>

4. Main function call

public class Test {
public static void Main (string[] args) {

ApplicationContext ApplicationContext = new Classpathxmlapplicationcontext (
New string[] {"Beans.xml", "Applicationcontext.xml"});
Computer C = (computer) Applicationcontext.getbean ("Thecomputer");
C.savedata ("personal resume");
}

}

Example of dependency injection in Spring (USB devices and smart devices)