java自带dom工具使用实例
2024-08-27 01:40:36
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.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://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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