自己动手打造ICO容器
需要五个类
（容器类），需要用此容器管理的类全部集成此类
package com.metarnet.extend;
import java.lang.reflect.Field;
import com.metarnet.Injects.Inject;
/**
* 容器
*/
public class IOC {
/**
* 初始化
* @param <T>
* @throws ClassNotFoundException
* @throws IllegalAccessException
* @throws IllegalArgumentException
*/
public void Init() throws Exception
{
Field[] fields = getClass().getDeclaredFields();
for(Field field : fields){
Inject inject=field.getAnnotation(Inject.class);
if(inject!=null)
{
field.setAccessible(true);
field.set(this,Class.forName(inject.ClassName().trim()).newInstance());
}
}
}
}
（注解类）
/**
*
*/
package com.metarnet.Injects;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* 类的依赖注入
* @author yanfan
*/
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Inject {
public String ClassName();
}
（主函数用于测试）
package com.metarnet.Main;
import com.metarnet.Injects.Inject;
import com.metarnet.Interfaces.Interface1;
import com.metarnet.extend.IOC;
public class TestIOC extends IOC{
@Inject(ClassName = "com.metarnet.Interfaces.imps.Interface1Impl")
private Interface1 interface1;
@Inject(ClassName = "com.metarnet.Interfaces.imps.Interface1Impl2")
private Interface1 interface2;
public Interface1 getInterface1() {
return interface1;
}
public void setInterface1(Interface1 interface1) {
this.interface1 = interface1;
}
public static void main(String[] args) {
TestIOC ioc = new TestIOC();
try {
ioc.Init();
} catch (Exception e) {
e.printStackTrace();
}
ioc.interface1.SayHello();
ioc.interface2.SayHello();
}
}
接口
package com.metarnet.Interfaces;
public interface Interface1{
public void SayHello();
}
继承接口类1
package com.metarnet.Interfaces.imps;
import com.metarnet.Interfaces.Interface1;
public class Interface1Impl implements Interface1{
@Override
public void SayHello() {
System.out.println("Hello World,My Name Is Interface1Impl");
}
}
继承接口类2
package com.metarnet.Interfaces.imps;
import com.metarnet.Interfaces.Interface1;
public class Interface1Impl2 implements Interface1{
@Override
public void SayHello() {
System.out.println("Hello World,My Name Is Interface1Impl2");
}
}
补充：移动开发 , IOS ,
