【Spring框架01】手动模拟IOC容器

org.dom4j

dom4j

2.1.1

jaxen

jaxen

1.1.6

[](()xml配置

这里最好还是写全生成小绿叶子好一点，不然后面test就报错！！！

xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance”

xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans.xsd">

[](()测试类

public class HelloService {

public void test(){

System.out.println(“HelloService…successful!!!”);

}

}

[](()模拟ioc

public interface ApplicationContext {

public Object getBean(String id);

}

public class lcyApplicationContext implements ApplicationContext {

private String xmlPath;

private List lcyBeans = new ArrayList<>();//存放解析结果

private Map beanMap = new HashMap<>();//存放反射生成的bean

public lcyApplicationContext(String xmlPath){

this.xmlPath=xmlPath;

readXml();

initBean();

}

private void initBean() {

//开始反射生成bean

if(lcyBeans.size()>0){

for(LcyBean lcyBean:lcyBeans){

String id=lcyBean.getId();

String clazz=lcyBean.getClazz();

try {

beanMap.put(id,Class.forName(clazz).newInstance());

} catch (InstantiationException e) {

e.printStackTrace();

} catch (IllegalAccessException e) {

e.printStackTrace();

} catch (ClassNotFoundException e) {

e.printStackTrace();

}

}

}

}

private void readXml() {

if(null!=xmlPath&&“”!=xmlPath){

//创建解析对象

SAXReader reader = new SAXReader();

try {

URL url = this.getClass().getClassLoader().getResource(xmlPath);

Document document = reader.read(url);

List list=document.selectNodes(“//beans/bean”);

for(Iterator iter =list.iterator();iter.hasNext()

{

Element e = (Element)iter.next();

System.out.println(e.attributeValue(“id”) + e.attributeValue(“class”));

//存入集合

LcyBean lcyBean= new LcyBean();

lcyBean.setId(e.attributeValue(“id”));

lcyBean.setClazz(e.attributeValue(“class”));

lcyBeans.add(lcyBean);

}

} catch (DocumentException e) {

e.printStackTrace();

System.err.println(“文件找不到”);

}

}

else{