dreamvc框架(一)ioc容器的集成

来源：互联网发布：java servlet 文件接口编辑：程序博客网时间：2024/06/09 20:22

我的dreamvc框架终于写得差不多了，借鉴了很多开源框架，SpringMVC、Struts2等，目前放在github上面。地址请猛戳我

写得差不多了，是要写一个总结，把自己当时的思路记录下来！还有更多的工作要做！

（一）

首先,IOC容器作为管理bean的重要工具，我们在日常的开发当中经常用到，最常用的就属SPRINGIOC了吧！当然，如果开发者不原理是用SPRINGIOC，那么你可以实现自己的容器，或者是用其他的3方ioc工具，只要实现dreamvc提供的IocFactory或者继承AbstractIocFactory。请看下面这个接口

package org.majorxie.dreamvc.ioc.factory;import java.util.List;import javax.servlet.ServletConfig;import javax.servlet.ServletContext;/** *IOC 容器 工厂接口 * * @author xiezhaodong(majorxie@139.com) *2014-10-24 */public interface IocFactory {/** * 加载容器 * @param config */void init(ServletContext context);/** * destory ioc */void destroy();/** * 得到所有的controller对象 * @return */List<Object> getControllers()throws Exception;/** * 是否是拦截器 * @return */List<Object> getInterceptors();/** * 得到其他对象 * @return */List<Object> getOthers();}

package org.majorxie.dreamvc.ioc.factory;import java.util.List;/** * 如果是Spring容器就让他自己destory,其他的可以继承该类覆盖此方法 * 如果想要扩展ioc，则可以选择使用extends还是implements *  @author xiezhaodong *2014-10-25 */public abstract class AbstractIocFactory implements IocFactory {/** * 默认实现为空 */public void destroy() {}public List<Object> getOthers() {return null;}}

开发者按照接口定义内容，封装好自己的controller和Interceptor。然后在web.xml里面配置实现类的路径就行了，dreamvc已经默认的实现了springioc，请看实现类

package org.majorxie.dreamvc.ioc.factory;import java.util.ArrayList;import java.util.List;import javax.servlet.ServletContext;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.majorxie.dreamvc.exception.NotHaveControllerException;import org.majorxie.dreamvc.interceptor.Interceptor;import org.majorxie.dreamvc.tag.Controller;import org.springframework.context.ApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;/** * Spring容器的实现,我们让spring去destory所以继承的abstract *  * @author xiezhaodong 2014-10-25 01:34 *  */public class SpringIocFactory extends AbstractIocFactory {private final Log log = LogFactory.getLog(SpringIocFactory.class);private ApplicationContext applicationContext;private List<Object> controllerBeans = new ArrayList<Object>();private List<Object> otherBeans = new ArrayList<Object>();private List<Object> interceptorBeans = new ArrayList<Object>();public void init(ServletContext context) {log.info("init context...");applicationContext = WebApplicationContextUtils.getRequiredWebApplicationContext(context);initBeans();}public List<Object> getControllers() throws NotHaveControllerException {if (controllerBeans.size() == 0) {throw new NotHaveControllerException("you need at least one controller ");} else {return controllerBeans;}}public List<Object> getInterceptors() {return interceptorBeans;}/** * 如果是Interceptor或者controller类，或者有着两个的注解都算是该类的类 * 遍历所有的bean装载到list *  */@SuppressWarnings("unchecked")private void initBeans() {String[] beanNames = applicationContext.getBeanDefinitionNames();for (String beanName : beanNames) {if (applicationContext.getBean(beanName) instanceof Interceptor/*||applicationContext.getType(beanName).isAnnotationPresent(org.majorxie.dreamvc.annotation.Interceptor.class)==true*/) {// applicationContext.getBean(beanName, Interceptor.class);interceptorBeans.add(applicationContext.getBean(beanName));log.info("init interceptor..");} elseif (applicationContext.getBean(beanName) instanceof Controller||applicationContext.getType(beanName).isAnnotationPresent(org.majorxie.dreamvc.annotation.Controller.class)==true) {controllerBeans.add(applicationContext.getBean(beanName));log.info("init controller....");} else {otherBeans.add(applicationContext.getBean(beanName));log.info("init others...");}}}@Overridepublic List<Object> getOthers() {return otherBeans;}}

配置web.xml加载参数

 <init-param>    <param-name>container</param-name>    <param-value>org.majorxie.dreamvc.ioc.factory.SpringIocFactory</param-value>  </init-param>

ok，我们的ioc集成已经完成了，现在就可以在application.xml配置了

<span style="white-space:pre"></span><bean id="test" class="test.ConTest"></bean><bean id="inter2" class="test.Interceptor_02"></bean><bean id="inter" class="test.LoginInterceptor"></bean>

下一篇，会讲解dreamvc的机制~~么么哒

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