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");

}

}

另附资源下载地址http://download.csdn.net/detail/yanfan0916/4773699