解析xml的工具类

如果xml 节点是二级，或三级 那么解析 提取数据时很容易的 但是一旦xml节点多 特别是子节点 那么 这样提取数据的时候 有时候代码需要不断的循环 寻找

定位的精确度 也很麻烦 甚至 是定位混乱，所以 自己写了个工具类 来和大家分享 代码如下：

import java.io.FileInputStream;

import java.io.IOException;

import java.io.PrintStream;

import java.util.ArrayList;

import java.util.List;

import org.jdom.Document;

import org.jdom.Element;

import org.jdom.JDOMException;

import org.jdom.input.SAXBuilder;

public class XmlConfigurationUtil

{

private String configFileName;

private Element root;

private static XmlConfigurationUtil instance;

public String path;

public XmlConfigurationUtil(String configFileName)

throws Exception

{

this.configFileName = configFileName;

loadConfig(configFileName);

}

public List<Element> getList(String pattern)

{

List nodes = new ArrayList();

if (pattern.startsWith("//")) return nodes;

String[] paths = pattern.substring(1).split("/");

Element currentElement = null;

for (String path : paths) {

if (currentElement == null) {

currentElement = this.root;

if (!currentElement.getName().equals(path))

return nodes;

}

else

{

nodes = currentElement.getChildren(path);

if (nodes.size() <= 0) break;

currentElement = (Element)nodes.get(0);

}

}

return nodes;

}

public String getText(String pattern)

{

String text = "";

List ls = getList(pattern);

if (ls.size() > 0) {

text = ((Element)ls.get(0)).getTextNormalize();

}

return text;

}

private void loadConfig(String path)

throws Exception

{

System.out.println(path);

String basicwebConfig =

path;

Document doc = getFileDocument(basicwebConfig);

System.out.print("Load Config from: " + basicwebConfig);

if (doc == null) {

System.out.println("... Faild");

throw new Exception("ERROR *** File " + basicwebConfig + " not found or format wellformed ***");

}

this.root = doc.getRootElement();

System.out.println("... OK");

}

private Document getFileDocument(String sFilePath)

{

Document doc = null;

try {

FileInputStream in = new FileInputStream(sFilePath);

doc = new SAXBuilder().build(in);

} catch (IOException ex) {

ex.printStackTrace();

} catch (JDOMException ex) {

ex.printStackTrace();

}

return doc;

}

public static void main(String[] args){

try {

XmlConfigurationUtil s= new XmlConfigurationUtil("e:\\test.xml");

s.path="e:\\";

List<Element> list=s.getList("/ARTICLE/ARTICLE_INFO/BAN_ID");

System.out.println(list.get(0).getValue());

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

main方法中List<Element> list=s.getList("/ARTICLE/ARTICLE_INFO/BAN_ID"); 意思就是

ARTICLE是最最父节点 然后下面就是一级一级的子节点 说道这里我想大家都已经明白了