Blade源码深入探索1--注册路由之ioc容器

最近在知乎看到一个GitHub项目，觉得适合自己学习，就打算深入研究，这里是GitHub的地址：https://github.com/biezhi/blade

附带作者大大自己写的说明：https://www.gitbook.com/book/biezhi/blade-in-action/details

依照作者写的教程，可以搭建一个简单的页面，现在开始探索blade源码，从开始注册路由开始解析。。。

根据作者自己的介绍：The Blade is the core operating class of the framework,which can be used to register routes,modify the template engine, set the file list display,static resource directory, and so on.可以知道Blade类是这个框架的核心类，可以注册路由、修改文件引擎、设置静态资源目录之类的操作。其类图大致如下：

先用me（）方法创建一个新的Blade对象，blade对象里，有几个重要的属性：

/** * Copyright (c) 2017, biezhi 王爵 ([e-mail]) * <p> * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * <p> * http://www.apache.org/licenses/LICENSE-2.0 * <p> * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package com.blade;import com.blade.event.BeanProcessor;import com.blade.event.EventListener;import com.blade.event.EventManager;import com.blade.event.EventType;import com.blade.exception.BladeException;import com.blade.ioc.Ioc;import com.blade.ioc.SimpleIoc;import com.blade.kit.Assert;import com.blade.kit.BladeKit;import com.blade.kit.IOKit;import com.blade.kit.StringKit;import com.blade.mvc.SessionManager;import com.blade.mvc.handler.DefaultExceptionHandler;import com.blade.mvc.handler.ExceptionHandler;import com.blade.mvc.handler.RouteHandler;import com.blade.mvc.handler.WebSocketHandler;import com.blade.mvc.hook.WebHook;import com.blade.mvc.http.HttpMethod;import com.blade.mvc.http.HttpSession;import com.blade.mvc.http.Session;import com.blade.mvc.route.RouteMatcher;import com.blade.mvc.ui.template.DefaultEngine;import com.blade.mvc.ui.template.TemplateEngine;import com.blade.server.Server;import com.blade.server.netty.NettyServer;import lombok.AccessLevel;import lombok.NoArgsConstructor;import lombok.NonNull;import lombok.extern.slf4j.Slf4j;import java.nio.file.Files;import java.nio.file.Paths;import java.util.*;import java.util.concurrent.CountDownLatch;import java.util.function.Consumer;import static com.blade.mvc.Const.*;/** * Blade Core * <p> * The Blade is the core operating class of the framework, * which can be used to register routes, * modify the template engine, set the file list display, * static resource directory, and so on. * * @author biezhi 2017/5/31 */@Slf4j@NoArgsConstructor(access = AccessLevel.PRIVATE)public class Blade {    /**     * Project middleware list,     * the default is empty, when you use the time you can call the use of methods to add.     * <p>     * Blade provide you with BasicAuthMiddleware, CsrfMiddleware,     * you can customize the implementation of some middleware     */    private List<WebHook> middleware = new ArrayList<>();    /**     * BeanProcessor list, which stores all the actions that were performed before the project was started     */    private List<BeanProcessor> processors = new ArrayList<>();    /**     * All need to be scanned by the package, when you do not set the time will scan com.blade.plugin package     */    private Set<String> packages = new LinkedHashSet<>(PLUGIN_PACKAGE_NAME);    /**     * All static resource URL prefixes,     * defaults to "/favicon.ico", "/robots.txt", "/static/", "/upload/", "/webjars/",     * which are located under classpath     */    private Set<String> statics = new HashSet<>(DEFAULT_STATICS);    /**     * The default IOC container implementation     */    private Ioc ioc = new SimpleIoc();    /**     * The default template engine implementation, this is a very simple, generally not put into production     */    private TemplateEngine templateEngine = new DefaultEngine();    /**     * Event manager, which manages all the guys that will trigger events     */    private EventManager eventManager = new EventManager();    /**     * Session manager, which manages session when you enable session     */    private SessionManager sessionManager = new SessionManager();    /**     * Used to wait for the start to complete the lock     */    private CountDownLatch latch = new CountDownLatch(1);    /**     * Web server implementation, currently only netty     */    private Server server = new NettyServer();    /**     * A route matcher that matches whether a route exists     */    private RouteMatcher routeMatcher = new RouteMatcher();    /**     * Blade environment, which stores the parameters of the app.properties configuration file     */    private Environment environment = Environment.empty();    /**     * Exception handling, it will output some logs when the error is initiated     */    private Consumer<Exception> startupExceptionHandler = (e) -> log.error("Start blade failed", e);    /**     * Exception handler, default is DefaultExceptionHandler.     * <p>     * When you need to customize the handling of exceptions can be inherited from DefaultExceptionHandler     */    private ExceptionHandler exceptionHandler = new DefaultExceptionHandler();    /**     * Used to identify whether the web server has started     */    private boolean started = false;    /**     * Project main class, the main category is located in the root directory of the basic package,     * all the features will be in the sub-package below     */    private Class<?> bootClass = null;    /**     * Session implementation type, the default is HttpSession.     * <p>     * When you need to be able to achieve similar RedisSession     */    private Class<? extends Session> sessionImplType = HttpSession.class;    /**     * WebSocket path     */    private String webSocketPath;    /**     * Blade app start banner, default is Const.BANNER     */    private String bannerText;    /**     * Blade app start thread name, default is Const.DEFAULT_THREAD_NAME     */    private String threadName;    /**     * WebSocket Handler     */    private WebSocketHandler webSocketHandler;    /**     * Give your blade instance, from then on will get the energy     *     * @return return blade instance     */    public static Blade me() {        return new Blade();    }    /**     * Get blade ioc container, default is SimpleIoc implement.     * <p>     * IOC container will help you hosting Bean or component, it is actually a Map inside.     * In the blade in a single way to make objects reuse,     * you can save resources, to avoid the terrible memory leak     *     * @return return ioc container     */    public Ioc ioc() {        return ioc;    }    /**     * Add a get route to routes     *     * @param path    your route path     * @param handler route implement     * @return return blade instance     */    public Blade get(@NonNull String path, @NonNull RouteHandler handler) {        routeMatcher.addRoute(path, handler, HttpMethod.GET);        return this;    }    /**     * Add a post route to routes     *     * @param path    your route path     * @param handler route implement     * @return return blade instance     */    public Blade post(@NonNull String path, @NonNull RouteHandler handler) {        routeMatcher.addRoute(path, handler, HttpMethod.POST);        return this;    }    /**     * Add a put route to routes     *     * @param path    your route path     * @param handler route implement     * @return return blade instance     */    public Blade put(@NonNull String path, @NonNull RouteHandler handler) {        routeMatcher.addRoute(path, handler, HttpMethod.PUT);        return this;    }    /**     * Add a delete route to routes     *     * @param path    your route path     * @param handler route implement     * @return return blade instance     */    public Blade delete(@NonNull String path, @NonNull RouteHandler handler) {        routeMatcher.addRoute(path, handler, HttpMethod.DELETE);        return this;    }    /**     * Add a before route to routes, the before route will be executed before matching route     *     * @param path    your route path     * @param handler route implement     * @return return blade instance     */    public Blade before(@NonNull String path, @NonNull RouteHandler handler) {        routeMatcher.addRoute(path, handler, HttpMethod.BEFORE);        return this;    }    /**     * Add a after route to routes, the before route will be executed after matching route     *     * @param path    your route path     * @param handler route implement     * @return return blade instance     */    public Blade after(@NonNull String path, @NonNull RouteHandler handler) {        routeMatcher.addRoute(path, handler, HttpMethod.AFTER);        return this;    }    /**     * Setting blade mvc default templateEngine     *     * @param templateEngine TemplateEngine object     * @return blade     */    public Blade templateEngine(@NonNull TemplateEngine templateEngine) {        this.templateEngine = templateEngine;        return this;    }    /**     * Get TemplateEngine, default is DefaultEngine     *     * @return return TemplateEngine     */    public TemplateEngine templateEngine() {        return templateEngine;    }    /**     * Get RouteMatcher     *     * @return return RouteMatcher     */    public RouteMatcher routeMatcher() {        return routeMatcher;    }    /**     * Register bean to ioc container     *     * @param bean bean object     * @return blade     */    public Blade register(@NonNull Object bean) {        ioc.addBean(bean);        return this;    }    /**     * Register bean to ioc container     *     * @param cls bean class, the class must provide a no args constructor     * @return blade     */    public Blade register(@NonNull Class<?> cls) {        ioc.addBean(cls);        return this;    }    /**     * Add multiple static resource file     * the default provides the static, upload     *     * @param folders static resource directory     * @return blade     */    public Blade addStatics(@NonNull String... folders) {        statics.addAll(Arrays.asList(folders));        return this;    }    /**     * Set whether to show the file directory, default doesn't show     *     * @param fileList show the file directory     * @return blade     */    public Blade showFileList(boolean fileList) {        this.environment(ENV_KEY_STATIC_LIST, fileList);        return this;    }    /**     * Set whether open gzip, default disabled     *     * @param gzipEnable enabled gzip     * @return blade     */    public Blade gzip(boolean gzipEnable) {        this.environment(ENV_KEY_GZIP_ENABLE, gzipEnable);        return this;    }    /**     * Get ioc bean     *     * @param cls bean class type     * @return return bean instance     */    public Object getBean(@NonNull Class<?> cls) {        return ioc.getBean(cls);    }    /**     * Get ExceptionHandler     *     * @return return ExceptionHandler     */    public ExceptionHandler exceptionHandler() {        return exceptionHandler;    }    /**     * Set ExceptionHandler, when you need a custom exception handling     *     * @param exceptionHandler your ExceptionHandler instance     * @return return blade instance     */    public Blade exceptionHandler(ExceptionHandler exceptionHandler) {        this.exceptionHandler = exceptionHandler;        return this;    }    /**     * Get current is developer mode     *     * @return return true is developer mode, else not.     */    public boolean devMode() {        return environment.getBoolean(ENV_KEY_DEV_MODE, true);    }    /**     * Whether encoding setting mode for developers     * The default mode is developers     *     * @param devMode developer mode     * @return blade     */    public Blade devMode(boolean devMode) {        this.environment(ENV_KEY_DEV_MODE, devMode);        return this;    }    public Class<?> bootClass() {        return this.bootClass;    }    /**     * Set whether to enable cors     *     * @param enableCors enable cors     * @return blade     */    public Blade enableCors(boolean enableCors) {        this.environment(ENV_KEY_CORS_ENABLE, enableCors);        return this;    }    /**     * Get blade statics list.     * e.g: "/favicon.ico", "/robots.txt", "/static/", "/upload/", "/webjars/"     *     * @return return statics     */    public Set<String> getStatics() {        return statics;    }    /**     * When set to start blade scan packages     *     * @param packages package name     * @return blade     */    public Blade scanPackages(@NonNull String... packages) {        this.packages.addAll(Arrays.asList(packages));        return this;    }    /**     * Get scan the package set.     *     * @return return packages set     */    public Set<String> scanPackages() {        return packages;    }    /**     * Set to start blade configuration file by default     * Boot config properties file in classpath directory.     * <p>     * Without setting will read the classpath -> app.properties     *     * @param bootConf boot config file name     * @return blade     */    public Blade bootConf(@NonNull String bootConf) {        this.environment(ENV_KEY_BOOT_CONF, bootConf);        return this;    }    /**     * Set the environment variable for global use here     *     * @param key   environment key     * @param value environment value     * @return blade     */    public Blade environment(@NonNull String key, @NonNull Object value) {        environment.set(key, value);        return this;    }    public Environment environment() {        return environment;    }    /**     * Set to start the web server to monitor port, the default is 9000     *     * @param port web server port     * @return blade     */    public Blade listen(int port) {        Assert.greaterThan(port, 0, "server port not is negative number.");        this.environment(ENV_KEY_SERVER_PORT, port);        return this;    }    /**     * Set to start the web server to listen the IP address and port     * The default will listen 0.0.0.0:9000     *     * @param address ip address     * @param port    web server port     * @return blade     */    public Blade listen(@NonNull String address, int port) {        Assert.greaterThan(port, 0, "server port not is negative number.");        this.environment(ENV_KEY_SERVER_ADDRESS, address);        this.environment(ENV_KEY_SERVER_PORT, port);        return this;    }    /**     * The use of multiple middleware, if any     *     * @param middleware middleware object array     * @return blade     */    public Blade use(@NonNull WebHook... middleware) {        if (!BladeKit.isEmpty(middleware)) {            this.middleware.addAll(Arrays.asList(middleware));        }        return this;    }    /**     * Get middleware list     *     * @return return middleware list     */    public List<WebHook> middleware() {        return this.middleware;    }    /**     * Set in the name of the app blade application     *     * @param appName application name     * @return blade     */    public Blade appName(@NonNull String appName) {        this.environment(ENV_KEY_APP_NAME, appName);        return this;    }    /**     * Add a event listener     * When the trigger event is executed eventListener     *     * @param eventType     event type     * @param eventListener event listener     * @return blade     */    public Blade event(@NonNull EventType eventType, @NonNull EventListener eventListener) {        eventManager.addEventListener(eventType, eventListener);        return this;    }    /**     * Get session implements Class Type     *     * @return return blade Session Type     */    public Class<? extends Session> sessionType() {        return this.sessionImplType;    }    /**     * Set session implements Class Type, e.g: RedisSession     *     * @param sessionImplType Session Type implement     * @return return blade instance     */    public Blade sessionType(Class<? extends Session> sessionImplType) {        this.sessionImplType = sessionImplType;        return this;    }    /**     * Event on started     *     * @param processor bean processor     * @return return blade instance     */    public Blade onStarted(@NonNull BeanProcessor processor) {        processors.add(processor);        return this;    }    /**     * Get processors     *     * @return return processors     */    public List<BeanProcessor> processors() {        return processors;    }    /**     * Get EventManager     *     * @return return EventManager     */    public EventManager eventManager() {        return eventManager;    }    /**     * Get SessionManager     *     * @return return SessionManager     */    public SessionManager sessionManager() {        return sessionManager;    }    /**     * Disable session, default is open     *     * @return return blade instance     */    public Blade disableSession() {        this.sessionManager = null;        return this;    }    /**     * Start blade application.     * <p>     * When all the routing in the main function of situations you can use,     * Otherwise please do not call this method.     *     * @return return blade instance     */    public Blade start() {        return this.start(null, null);    }    /**     * Start blade application     *     * @param mainCls main Class, the main class bag is basic package     * @param args    command arguments     * @return return blade instance     */    public Blade start(Class<?> mainCls, String... args) {        return this.start(mainCls, DEFAULT_SERVER_ADDRESS, DEFAULT_SERVER_PORT, args);    }    /**     * Start the blade web server     *     * @param bootClass Start the boot class, used to scan the class in all of the packages     * @param address   web server bind ip address     * @param port      web server bind port     * @param args      launch parameters     * @return blade     */    public Blade start(Class<?> bootClass, @NonNull String address, int port, String... args) {        try {            environment.set(ENV_KEY_SERVER_ADDRESS, address);            Assert.greaterThan(port, 0, "server port not is negative number.");            this.bootClass = bootClass;            eventManager.fireEvent(EventType.SERVER_STARTING, this);            Thread thread = new Thread(() -> {                try {                    server.start(Blade.this, args);                    latch.countDown();                    server.join();                } catch (Exception e) {                    startupExceptionHandler.accept(e);                }            });            String threadName = null != this.threadName ? this.threadName : environment.get(ENV_KEY_APP_THREAD_NAME, null);            threadName = null != threadName ? threadName : DEFAULT_THREAD_NAME;            thread.setName(threadName);            thread.start();            started = true;        } catch (Exception e) {            startupExceptionHandler.accept(e);        }        return this;    }    /**     * Await web server started     *     * @return return blade instance     */    public Blade await() {        if (!started) {            throw new IllegalStateException("Server hasn't been started. Call start() before calling this method.");        }        try {            latch.await();        } catch (Exception e) {            log.error("await error", e);            Thread.currentThread().interrupt();        }        return this;    }    /**     * Stop current blade application     * <p>     * Will stop synchronization waiting netty service     */    public void stop() {        eventManager.fireEvent(EventType.SERVER_STOPPING, this);        server.stopAndWait();        eventManager.fireEvent(EventType.SERVER_STOPPED, this);    }    /**     * Register WebSocket path     *     * @param path    websocket path     * @param handler websocket handler     * @return return blade instance     */    public Blade webSocket(@NonNull String path, @NonNull WebSocketHandler handler) {        if (null != this.webSocketHandler) {            throw new BladeException(500, "There is already a WebSocket path.");        }        this.webSocketPath = path;        this.webSocketHandler = handler;        System.out.println(String.format("\n\t\t\t\t\t\t\t\t\t\t\t\t\t" +                "\t\t\t\t\t Register WebSocket Path: %s\n", path));        return this;    }    /**     * Get webSocket path     *     * @return return websocket path     */    public String webSocketPath() {        return webSocketPath;    }    /**     * Set blade start banner text     *     * @param bannerText banner text     * @return return blade instance     */    public Blade bannerText(String bannerText) {        this.bannerText = bannerText;        return this;    }    /**     * Get banner text     *     * @return return blade start banner text     */    public String bannerText() {        if (null != bannerText) return bannerText;        String bannerPath = environment.get(ENV_KEY_BANNER_PATH, null);        if (StringKit.isNotBlank(bannerPath) && Files.exists(Paths.get(bannerPath))) {            try {                bannerText = IOKit.readToString(bannerPath);            } catch (Exception e) {            }            return bannerText;        }        return null;    }    /**     * Set blade start thread name     *     * @param threadName thread name     * @return return blade instance     */    public Blade threadName(String threadName) {        this.threadName = threadName;        return this;    }    /**     * Get WebSocket Handler     *     * @return return websocket handler     */    public WebSocketHandler webSocketHandler() {        return webSocketHandler;    }}

先分析Blade中构建Ioc容器的过程。在代码第99行中，有一句 private Ioc ioc = new SimpleIoc();

Blade里实现一个默认的ioc容器，将一些默认的对象存储到ioc容器中，再新建一个SimpleIoc对象，其类图如下：

SimpleIoc类

package com.blade.ioc;import com.blade.ioc.bean.BeanDefine;import lombok.extern.slf4j.Slf4j;import java.util.*;/** * The default IOC container implementation * * @author <a href="mailto:[e-mail]" target="_blank">biezhi</a> * @since 1.5 */@Slf4jpublic class SimpleIoc implements Ioc {    private final Map<String, BeanDefine> pool = new HashMap<>(32);    /**     * Add user-defined objects     */    @Override    public void addBean(Object bean) {        addBean(bean.getClass().getName(), bean);    }    /**     * Add user-defined objects     */    @Override    public void addBean(String name, Object bean) {        BeanDefine beanDefine = new BeanDefine(bean);        addBean(name, beanDefine);        // add interface        Class<?>[] interfaces = beanDefine.getType().getInterfaces();        if (interfaces.length > 0) {            for (Class<?> interfaceClazz : interfaces) {                this.addBean(interfaceClazz.getName(), beanDefine);            }        }    }    /**     * Update BeanDefine     */    @Override    public void setBean(Class<?> type, Object proxyBean) {        BeanDefine beanDefine = pool.get(type.getName());        if (beanDefine != null) {            beanDefine.setBean(proxyBean);        } else {            beanDefine = new BeanDefine(proxyBean, type);        }        pool.put(type.getName(), beanDefine);    }    /**     * Register @Bean marked objects     */    @Override    public <T> T addBean(Class<T> type) {        Object bean = addBean(type, true);        return type.cast(bean);    }    @Override    public <T> T getBean(Class<T> type) {        Object bean = this.getBean(type.getName());        try {            return type.cast(bean);        } catch (Exception e) {            e.printStackTrace();        }        return null;    }    @Override    public Object getBean(String name) {        BeanDefine beanDefine = pool.get(name);        if (beanDefine == null) {            return null;        }        return beanDefine.getBean();    }    @Override    public List<BeanDefine> getBeanDefines() {        return new ArrayList<>(pool.values());    }    @Override    public BeanDefine getBeanDefine(Class<?> type) {        return this.getBeanDefine(type, true);    }    @Override    public List<Object> getBeans() {        Set<String>  beanNames = this.getBeanNames();        List<Object> beans     = new ArrayList<>(beanNames.size());        for (String beanName : beanNames) {            Object bean = this.getBean(beanName);            if (null != bean) {                beans.add(bean);            }        }        return beans;    }    @Override    public Set<String> getBeanNames() {        return pool.keySet();    }    @Override    public void remove(String beanName) {        pool.remove(beanName);    }    @Override    public void remove(Class<?> type) {        pool.remove(type.getSimpleName());    }    @Override    public void clearAll() {        pool.clear();    }    /**     * Add user-defined objects     */    private void addBean(String name, BeanDefine beanDefine) {        if (pool.put(name, beanDefine) != null) {            log.warn("Duplicated Bean: {}", name);        }    }    /**     * Register @Bean marked objects     */    private Object addBean(Class<?> type, boolean singleton) {        return addBean(type.getName(), type, singleton);    }    /**     * Register @Bean marked objects     */    private Object addBean(String name, Class<?> beanClass, boolean singleton) {        BeanDefine beanDefine = this.getBeanDefine(beanClass, singleton);        if (pool.put(name, beanDefine) != null) {            log.warn("Duplicated Bean: {}", name);        }        // add interface        Class<?>[] interfaces = beanClass.getInterfaces();        if (interfaces.length > 0) {            for (Class<?> interfaceClazz : interfaces) {                if (null != this.getBean(interfaceClazz)) {                    break;                }                this.addBean(interfaceClazz.getName(), beanDefine);            }        }        return beanDefine.getBean();    }    private BeanDefine getBeanDefine(Class<?> beanClass, boolean singleton) {        try {            Object object = beanClass.newInstance();            return new BeanDefine(object, beanClass, singleton);        } catch (InstantiationException | IllegalAccessException e) {            e.printStackTrace();        }        return null;    }}

其中BeanDefine类定义了一个ioc的目标

package com.blade.ioc.bean;/** * Bean Define, IOC to define a target * * @author <a href="mailto:[e-mail]" target="_blank">biezhi</a> * @since 1.5 */public class BeanDefine {    private Object bean;    private Class<?> type;    private boolean isSingle;    public BeanDefine(Object bean) {        this(bean, bean.getClass());    }    public BeanDefine(Object bean, Class<?> type) {        this.bean = bean;        this.type = type;        this.isSingle = true;    }    public BeanDefine(Object bean, Class<?> type, boolean isSingle) {        this.bean = bean;        this.type = type;        this.isSingle = isSingle;    }    public Object getBean() {        return bean;    }    public void setBean(Object bean) {        this.bean = bean;    }    public Class<?> getType() {        return type;    }    public void setType(Class<?> type) {        this.type = type;    }    public boolean isSingle() {        return isSingle;    }    public void setSignle(boolean isSingle) {        this.isSingle = isSingle;    }}

又因为SimpleIoc类中，私有属性：

private final Map<String, BeanDefine> pool = new HashMap<>(32);

所以在启动的时候，SimpleIoc对象会先创建一个ioc的池子pool，用来实现ioc的存储Bean对象。每个pool里的对象，有三个属性：bean的名称、class类型的type、还是一个布尔值。

接下来再回到Blade中看代码，框架中先注册一个Object对象到ioc容器中，调用SimpleIoc中的addBean(Object bean)方法：

public void addBean(Object bean) {        addBean(bean.getClass().getName(), bean);    }

再调用addBean(String name, Object bean)方法：

public void addBean(String name, Object bean) {        BeanDefine beanDefine = new BeanDefine(bean);        addBean(name, beanDefine);        // add interface        Class<?>[] interfaces = beanDefine.getType().getInterfaces();        if (interfaces.length > 0) {            for (Class<?> interfaceClazz : interfaces) {                this.addBean(interfaceClazz.getName(), beanDefine);            }        }    }

先创建一个BeanDefine对象，然后调用addBean(String name, BeanDefine beanDefine)方法，向一开始定义的IOC容器pool池子中添加用户定义的对象。

再通过for循环获得这个对象所有接口，然后把这些再次用addBean(String name, BeanDefine beanDefine)方法添加进去。

那么这个方法就完成了，继续

接下来又注册一个任意类型的class，调用addBean(Class<T> type)方法：

public <T> T addBean(Class<T> type) {        Object bean = addBean(type, true);        return type.cast(bean);    }

返回通过此Class对象所表示的类或接口，调用addBean(Class<?> type, boolean singleton)方法：

private Object addBean(Class<?> type, boolean singleton) {        return addBean(type.getName(), type, singleton);    }

再通过addBean(String name, Class<?> beanClass, boolean singleton)方法：

private Object addBean(String name, Class<?> beanClass, boolean singleton) {        BeanDefine beanDefine = this.getBeanDefine(beanClass, singleton);        if (pool.put(name, beanDefine) != null) {            log.warn("Duplicated Bean: {}", name);        }        // add interface        Class<?>[] interfaces = beanClass.getInterfaces();        if (interfaces.length > 0) {            for (Class<?> interfaceClazz : interfaces) {                if (null != this.getBean(interfaceClazz)) {                    break;                }                this.addBean(interfaceClazz.getName(), beanDefine);            }        }        return beanDefine.getBean();    }

此方法中先调用getBeanDefine(Class<?> beanClass, boolean singleton)方法：

private BeanDefine getBeanDefine(Class<?> beanClass, boolean singleton) {        try {            Object object = beanClass.newInstance();            return new BeanDefine(object, beanClass, singleton);        } catch (InstantiationException | IllegalAccessException e) {            e.printStackTrace();        }        return null;    }

先将一开始从Blade传递过来的Class<?>对象，创建此Class对象所表示的类的新实例。再返回一个BeanDefine对象，

再在addBean()方法中，先检验pool中有没有这个bean，然后获取Blade传递过来的Class<?>所有的实例，然后把这些再次用addBean(String name, BeanDefine beanDefine)方法添加进IOC容器的pool池子中去。

这样这个IOC容器就可以完成存储对象的功能，其他的下次再进行分析了。。。

不过从代码中看出作者使用Java反射机制完成设计ioc，改天去研究jvm的反射机制吧。。。