java自带dom工具使用实例

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代码参考自

黄亿华大神的<<1000行代码读懂Spring（一）- 实现一个基本的IoC容器>>
原网页如下
http://my.oschina.net/flashsword/blog/192551

package com.myspring;     import java.io.FileInputStream;   import java.io.InputStream;     import javax.xml.parsers.DocumentBuilder;   import javax.xml.parsers.DocumentBuilderFactory;     import org.w3c.dom.Document;   import org.w3c.dom.Element;   import org.w3c.dom.Node;   import org.w3c.dom.NodeList;     public class XmlReader {       public static void main(String[] args) {           new XmlReader();       }       public XmlReader(){           DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();           try {               DocumentBuilder domBuilder = domfac.newDocumentBuilder();                           //默认是工程目录            InputStream is =new FileInputStream("bin/resources/tinyioc.xml");               Document doc = domBuilder.parse(is);               Element root = doc.getDocumentElement();               NodeList beans = root.getChildNodes();               if(beans!=null)                 for (int i = 0; i < beans.getLength(); i++) {                Node bean =  beans.item(i);                       if (bean.getNodeName().equals("bean")) {                    Element el=(Element) bean;                    System.out.println( el.getAttribute("id") +"  "+el.getAttribute("class") );                    NodeList propertyNode = el.getElementsByTagName("property");                    for (int j = 0; j < propertyNode.getLength(); j++)                     if(propertyNode.item(j) instanceof Element){                    Element e=(Element) propertyNode.item(j);                    String name=e.getAttribute("name");                    String value=e.getAttribute("value").equals("")?e.getAttribute("ref"):e.getAttribute("value");                    System.out.println("       "+name+"  "+value );                    }}                                      }                          } catch (Exception e) {               // TODO Auto-generated catch block               e.printStackTrace();           }                  }   }

xml如下

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">    <bean id="helloWorldService" class="com.myspring.HelloWorldServiceImpl">        <property name="text" value="Hello World!"></property>        <property name="out" ref="outputService"></property>    </bean>            <bean id="outputService" class="com.myspring.OutputService">    </bean>    <bean id="autoProxyCreator" class="us.codecraft.tinyioc.aop.AspectJAwareAdvisorAutoProxyCreator"></bean>    <bean id="timeInterceptor" class="us.codecraft.tinyioc.aop.TimerInterceptor"></bean>    <bean id="aspectjAspect" class="us.codecraft.tinyioc.aop.AspectJExpressionPointcutAdvisor">        <property name="advice" ref="timeInterceptor"></property>        <property name="expression" value="execution(* us.codecraft.tinyioc.*.*(..))"></property>    </bean></beans>

运行结果如下

helloWorldService com.myspring.HelloWorldServiceImpl
text Hello World!
out outputService
outputService com.myspring.OutputService
autoProxyCreator us.codecraft.tinyioc.aop.AspectJAwareAdvisorAutoProxyCreator
timeInterceptor us.codecraft.tinyioc.aop.TimerInterceptor
aspectjAspect us.codecraft.tinyioc.aop.AspectJExpressionPointcutAdvisor
advice timeInterceptor
expression execution(* us.codecraft.tinyioc.*.*(..))

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