使用JDOM构建xml(2)

使用JDOM读xml

写一段代码读前面(1)的xml文件，代码如下

SAXBuilder builder = new SAXBuilder(false);
		Document doc = builder.build("d:/a.xml");
		//获取处理指令并输出
		ProcessingInstruction ins = (ProcessingInstruction) doc.getContent(0);
		System.out.print("<?" + ins.getTarget() + " ");
		List<String> insList = ins.getPseudoAttributeNames();
		for(int index = 0; index < insList.size(); index++){
			String value = insList.get(index);
			System.out.print(value + "=\"" + ins.getPseudoAttributeValue(value) + "\"");
			if(index < insList.size() - 1){
				System.out.print(" ");
			}
		}
		System.out.println("?>");
		//获取DocType并输出
		DocType docType = doc.getDocType();
		System.out.print("<!DOCTYPE " + docType.getElementName());
		System.out.print(" PUBLIC \"" +docType.getPublicID() + "\"");
		System.out.println(" \"" + docType.getSystemID() + "\"");
		//获取root
		Element root = doc.getRootElement();
		//输出root的头部
		System.out.print("<" +root.getName() + " ");
		List<Attribute> rootAttrList = root.getAttributes();
		for(int index = 0; index < rootAttrList.size(); index++){
			Attribute attr = rootAttrList.get(index);
			System.out.print(attr.getName() + "=\"" + attr.getValue() + "\"");
			if(index < rootAttrList.size() - 1){
				System.out.print(" ");
			}
		}
		System.out.println(">");
		//获取子元素
		List<Element> childList = root.getChildren();
		for(int eleIndex = 0; eleIndex < childList.size(); eleIndex++){
			Element element = childList.get(eleIndex);
			String elementName = element.getName();
			String elementValue = element.getText();
			List<Element> innerList = element.getChildren();
			if(innerList == null || innerList.size() == 0){
				System.out.println("<" + elementName + ">" + elementValue + "</" + elementName + ">");
			}else{
				System.out.println("<" + elementName + ">");
				for(int innerIndex = 0; innerIndex < innerList.size(); innerIndex++){
					Element innerElement = innerList.get(innerIndex);
					String innerElementName = innerElement.getName();
					String innerElementValue = innerElement.getText();
					System.out.println("<" + innerElementName + ">" + innerElementValue + "</" + innerElementName + ">");
				}
				System.out.println("</" + elementName + ">");
			}
		}
		//输出root的结尾
		System.out.println("</root>");

 最后输出结果如下：

<?xml-stylesheet type="text/xsl" href="products.xsl"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"
<root root="this is root">
<file>c:/a.txt</file>
<test>
<testInner>test</testInner>
</test>
</root>