java结合XPATH解析XML

做自动化测试的人，都应该对XPATH很熟悉了，但是在用JAVA解析XML时，我们通常是一层层的遍历进去，这样的代码的局限性很大，也不方便，于是我们结合一下XPATH，来解决这个问题。

所需要的JAR包：

dom4j.jar

jaxen.jar

xmlbeans.jar

具体的代码如下：

public class ParseXml {	
	
	private String filePath;

	private Document document; 	
	
	public ParseXml(String filePath) {		
		this.filePath = filePath;
		this.load(this.filePath);
	}	
	
	private void load(String filePath){
		File file = new File(filePath);
		if (file.exists()) {
			SAXReader saxReader = new SAXReader();
			try {
				document = saxReader.read(file);
			} catch (DocumentException e) {		
				System.out.println("文件加载异常：" + filePath);				
			}
		} else{
			System.out.println("文件不存在 : " + filePath);
		}			
	}	
	
	public Element getElementObject(String elementPath) {
		return (Element) document.selectSingleNode(elementPath);
	}	
	
	@SuppressWarnings("unchecked")
	public List<Element> getElementObjects(String elementPath) {
		return document.selectNodes(elementPath);
	}
	
	@SuppressWarnings("unchecked")
	public Map<String, String> getChildrenInfoByElement(Element element){
		Map<String, String> map = new HashMap<String, String>();
		List<Element> children = element.elements();
		for (Element e : children) {
			map.put(e.getName(), e.getText());
		}
		return map;
	}
	
	public boolean isExist(String elementPath){
		boolean flag = false;
		Element element = this.getElementObject(elementPath);
		if(element != null) flag = true;
		return flag;
	}

	public String getElementText(String elementPath) {
		Element element = this.getElementObject(elementPath);
		if(element != null){
			return element.getText().trim();
		}else{
			return null;
		}		
	}
	
	public static void main(String[] args) {
		
		ParseXml px = new ParseXml("config/TestBaidu.xml");
		List<Element> elements = px.getElementObjects("/*/testUI");
		
	}
	
}