解析xml几个方法的简单封装

import java.io.File;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
/**
*
* @author D_xiao
*
*/
public class AnalysisXmlByDom {
/**
* 功能            ：通过dom的方法解析文档，得到子节点内容
* 参数           :url:文档路径 ; rootElemnt:xml文件根节点; childElement:子节点
* return :子节点内容
* */
public String dom(String url,String rootElement,String clildElement){
String child = null;
try{
File f=new File(url);
DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
DocumentBuilder builder=factory.newDocumentBuilder();
Document doc = builder.parse(f);
NodeList nl = doc.getElementsByTagName(rootElement);
for (int i=0;i<nl.getLength();i++){
child = doc.getElementsByTagName(clildElement).item(i).getFirstChild().getNodeValue();
}
}catch(Exception e){
e.printStackTrace();
}
return child;
}
public static void main(String[] args) {
AnalysisXmlByJdom dom = new AnalysisXmlByJdom();
String a = dom.dom("src/first.xml", "value", "no");
System.out.println(a);
}
}

import java.io.File;
import java.util.Iterator;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class AnalysisXmlByDom4j {
/**
* 功能            ：通过jdom的方法解析文档，得到子节点内容
* 参数           :url:文档路径 ; rootElemnt:xml文件根节点; childElement:子节点
* return :子节点内容
* */
public String dom4j(String url,String clildElement){
String child = null;
try {
//使用SAX方式解析xml
SAXReader saxReader = new SAXReader();
//读取first.xml资源
Document doc = saxReader.read(new File(url));
//取得根节点
Element root = doc.getRootElement();
Element foo;
//遍历根节点的所有孩子节点
for (Iterator i = root.elementIterator(); i.hasNext();){
foo = (Element) i.next();
child = foo.elementText(clildElement);
}
} catch (Exception e) {
e.printStackTrace();
}
return child;
}
public static void main(String[] args) {
AnalysisXmlByJdom dom4j = new AnalysisXmlByJdom();
String a = jdom4j.jdom4j("src/first.xml", "value", "no");
System.out.println(a);
}
}

import java.io.File;
import java.util.List;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
public class AnalysisXmlByJdom {
/**
* 功能            ：通过jdom的方法解析文档，得到子节点内容
* 参数           :url:文档路径 ; rootElemnt:xml文件根节点; childElement:子节点
* return :子节点内容
* */
public String jdom(String url,String rootElement,String childElement){
String child = null;
try {
//创建一个SAXBudilder对象
SAXBuilder builder = new SAXBuilder();
//读取first.xml资源
Document doc = builder.build(new File(url));
//获取根元素
Element foo = doc.getRootElement();
//获取根元素下面所有的子元素
List<Element> allChildren = foo.getChildren(rootElement);
for(int i=0;i<allChildren.size();i++) {
child = (allChildren.get(i)).getChild(childElement).getText();
}
} catch (Exception e) {
e.printStackTrace();
}
return child;
}

/**
* 测试
* @param args
*/
public static void main(String[] args) {
AnalysisXmlByJdom jdom = new AnalysisXmlByJdom();
String a = jdom.jdom("src/first.xml", "value", "no");
System.out.println(a);
}
}