我也来实现ioc
前两天看到论坛上有人实现的ioc功能,也就自己实现了一个基本一样的.
public class MyCompiler {ArrayList<BeanModel> resource=new ArrayList<BeanModel>();HashMap<String,Object> oo=new HashMap<String,Object>();public void parseThis() throws SAXException, DocumentException, ClassNotFoundException, InstantiationException, IllegalAccessException{SAXReader sr=new SAXReader();Document document=sr.read(new File("path"));System.out.println("mycompiler");Element root=document.getRootElement();List thislist=root.elements("bean");Iterator ii=thislist.iterator();while(ii.hasNext()){BeanModel bm=new BeanModel();Element idNode=(Element)ii.next();String id=idNode.attribute("id").getValue();String className=idNode.attribute("class").getValue();bm.setClassName(className);bm.setId(id); HashMap<String,String> propertyNames=new HashMap<String,String>(); List refList=idNode.elements("property"); Iterator iiii= refList.iterator(); while(iiii.hasNext()){ Element eee=(Element)iiii.next(); String name=eee.attributeValue("name"); String ref=eee.attributeValue("ref"); propertyNames.put(name, ref); } bm.setPropertyNames(propertyNames); resource.add(bm); }}public void instanceAllRef() throws InstantiationException, IllegalAccessException, ClassNotFoundException, SecurityException, NoSuchMethodException, IllegalArgumentException, InvocationTargetException{for(BeanModel bm:resource){String id=bm.getId();String className=bm.getClassName();oo.put(id,Class.forName(className).newInstance());}for(BeanModel bm:resource){String id=bm.getId();String className=bm.getClassName();HashMap<String,String> thisMap=bm.getPropertyNames(); Set<Map.Entry<String, String>> set = thisMap.entrySet(); Iterator<Map.Entry<String, String>> it=set.iterator(); while(it.hasNext()){ Map.Entry<String,String> entry=it.next(); String name=entry.getKey(); String ref=entry.getValue();Object obj= oo.get(ref);String setterName="set"+name.substring(0,1).toUpperCase()+name.substring(1);Method method=oo.get(bm.getId()).getClass().getMethod(setterName,obj.getClass().getInterfaces());//传入属性的接口和class都行 接口更加广泛method.invoke(oo.get(bm.getId()), obj); }}} public MyCompiler() throws SAXException, DocumentException, ClassNotFoundException, InstantiationException, IllegalAccessException, SecurityException, IllegalArgumentException, NoSuchMethodException, InvocationTargetException{this.parseThis();this.instanceAllRef();}public Object getBean(String id){return this.oo.get(id);}}BeanModel
public class BeanModel {private String id;private String className;private HashMap<String,String> propertyNames;public String getId() {return id;}public void setId(String id) {this.id = id;}public String getClassName() {return className;}public void setClassName(String className) {this.className = className;}public HashMap<String, String> getPropertyNames() {return propertyNames;}public void setPropertyNames(HashMap<String, String> propertyNames) {this.propertyNames = propertyNames;}}只求实现基本的思路和流程.
然后发现反射的时候,如果method的参数指定某一个类的class比如我这边Method method=oo.get(bm.getId()).getClass().getMethod(setterName,obj.getClass().getInterfaces() 改成Method method=oo.get(bm.getId()).getClass().getMethod(setterName,obj.getClass()那么传入的参数是实现类的时候是不能实现的,如果传入参数改成接口或者superclass(),因为getInterfaces()返回的是一个class数组,也是满足参数的类型.