持有者Container.java持有，所有的控制器和拦截器实例，多个拦截器构成拦截器链。

初始化控制器：非常简单，在DispatcherServlet初始化时，调用它Container.init(config)，init方法里查找所有class文件，有Mapping注解的方法，校验后，即为控制器。

初始化拦截器：同上。Mapping注解有2个参数url，cmi，其中cmi为自定义拦截器（cmi为c：controller，m：me，i：interceptor）。Container.java代码如下：

package cn.eternal.container;import java.io.File;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;import cn.eternal.annotation.Mapping;
import cn.eternal.config.Config;
import cn.eternal.config.ConfigException;
import cn.eternal.handler.InstanceHandler;
import cn.eternal.handler.MappingHandler;
import cn.eternal.interceptor.EmptyInterceptor;
import cn.eternal.interceptor.Interceptor;
import cn.eternal.renderer.Renderer;
import cn.eternal.util.ConverterUtil;
public class Container {private static Log log = LogFactory.getLog(Container.class);public static Map<MappingHandler,Interceptor[]> interceptors = new HashMap<MappingHandler,Interceptor[]>();public static MappingHandler[] MappingHandlers = null;public static Map<MappingHandler, InstanceHandler> mhih = new HashMap<MappingHandler, InstanceHandler>();private static ConverterUtil converterUtil = new ConverterUtil();public static void init(final Config config) throws ClassNotFoundException, InstantiationException, IllegalAccessException{initControllersAndInterceptors(config);}static void warnInvalidInstanceHandlerMethod(Method m, String string) {log.warn("Init Invalid Controller method '" + m.toGenericString() + "': " + string);}public static void initControllersAndInterceptors(Config config) throws ClassNotFoundException, InstantiationException, IllegalAccessException{ClassLoader cld = Thread.currentThread().getContextClassLoader();URL resource = cld.getResource("/");File dirs = new File(resource.getFile());ArrayList<Class> classList = new ArrayList<Class>();findClass(dirs,"",classList);findControllersAndInterceptors(classList,config.getInitParameter("interceptors"));MappingHandlers = mhih.keySet().toArray(new MappingHandler[mhih.size()]);Arrays.sort(MappingHandlers,new Comparator<MappingHandler>() {public int compare(MappingHandler o1, MappingHandler o2) {String u1 = o1.url;String u2 = o2.url;int n = u1.compareTo(u2);if (n==0)throw new ConfigException("Cannot mapping one url '" + u1 + "' to more than one Controller method.");return n;}});}private static void findClass(File dirs,String basePack,ArrayList<Class> classList)throws ClassNotFoundException {File[] childs = dirs.listFiles();for (int i = 0; i < childs.length; i++) {String packPath =basePack+childs[i].getName()+".";if (childs[i].isDirectory()) {findClass(childs[i],packPath,classList);} else {String className = childs[i].getName();if (className.endsWith(".class")) {packPath=packPath.replace(".class.", "");classList.add(Class.forName(packPath));}}}}private static void findControllersAndInterceptors(ArrayList<Class> classLst,String inters)throws InstantiationException, IllegalAccessException, ClassNotFoundException {for (int c = 0; c < classLst.size(); c++) {Class clazz = classLst.get(c);Method mArr[] = clazz.getDeclaredMethods();for (Method m:mArr) {if (isControllerMethod(m)) {Mapping mapping = m.getAnnotation(Mapping.class);String url = mapping.url();MappingHandler matcher = new MappingHandler(url);if (matcher.getArgumentCount()!=m.getParameterTypes().length) {warnInvalidInstanceHandlerMethod(m, "Arguments in URL '" + url + "' does not match the arguments of method.");continue;}log.info("Init Controller "+m.toGenericString()+" Mapping url '" + url + "'.");mhih.put(matcher, new InstanceHandler(clazz.newInstance(), m));Class cmi = mapping.cmi();String cinters = "";if(cmi != null && cmi != EmptyInterceptor.class){if(inters != "" && inters != null){cinters = ","+cmi.getName();log.info("Init Interceptor "+cmi.getName()+" For "+m.toGenericString()+".");}}addInterceptors(matcher,(inters+cinters).split(","));}}}}static void addInterceptors(MappingHandler matcher,String[] inters) throws InstantiationException, IllegalAccessException, ClassNotFoundException {Interceptor[] interArr = new Interceptor[inters.length];for(int i=0;i<inters.length;i++){interArr[i] = (Interceptor)(Class.forName(inters[i])).newInstance();}interceptors.put(matcher,interArr);}static boolean isControllerMethod(Method m) {Mapping mapping = m.getAnnotation(Mapping.class);if (mapping==null)return false;if (mapping.url().length()==0) {warnInvalidInstanceHandlerMethod(m, "Url mapping cannot be empty.");return false;}if (Modifier.isStatic(m.getModifiers())) {warnInvalidInstanceHandlerMethod(m, "method is static.");return false;}Class<?>[] argTypes = m.getParameterTypes();for (Class<?> argType : argTypes) {if (!converterUtil.canConvert(argType)) {warnInvalidInstanceHandlerMethod(m, "unsupported parameter '" + argType.getName() + "'.");return false;}}Class<?> retType = m.getReturnType();if (retType.equals(void.class)|| retType.equals(String.class)|| Renderer.class.isAssignableFrom(retType))return true;warnInvalidInstanceHandlerMethod(m, "unsupported return type '" + retType.getName() + "'.");return false;}public static void destroy() {interceptors = null;MappingHandlers = null;mhih = null;converterUtil = null;}public static MappingHandler[] getMappingHandlers() {return MappingHandlers;}public static Map<MappingHandler, InstanceHandler> getMhih() {return mhih;}public static Interceptor[] getInterceptors(MappingHandler matcher) {return interceptors.get(matcher);}
}

Mapping.java代码：

package cn.eternal.annotation;import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;import cn.eternal.interceptor.EmptyInterceptor;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Mapping {String url();Class<?> cmi() default EmptyInterceptor.class;
}