JAVA解析XML格式字符串

import java.io.IOException;
import java.io.StringReader;
import java.util.List;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.Namespace;
import org.jdom.input.SAXBuilder;
import org.xml.sax.InputSource;

public class DuXMLDoc {
public List xmlElements(String xmlDoc) {
if (xmlDoc!=null && !xmlDoc.equals("")) {
Pattern p = Pattern.compile("\r|\n");
Matcher m = p.matcher(xmlDoc);
xmlDoc = m.replaceAll("");
}//创建一个新的字符串
StringReader read = new StringReader(xmlDoc);
//创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
InputSource source = new InputSource(read);
//创建一个新的SAXBuilder
SAXBuilder sb = new SAXBuilder();
try {
//通过输入源构造一个Document
Document doc = sb.build(source);
//取的根元素
Element root = doc.getRootElement();
System.out.println(root.getName());//输出根元素的名称（测试）
//得到根元素所有子元素的集合
List jiedian = root.getChildren();
//获得XML中的命名空间（XML中未定义可不写）
Namespace ns = root.getNamespace();
Element et = null;
for(int i=0;i<jiedian.size();i++){
et = (Element) jiedian.get(i);//循环依次得到子元素

System.out.println(et.getChild("users_id",ns).getText());
System.out.println(et.getChild("users_address",ns).getText());
}

et = (Element) jiedian.get(0);
List zjiedian = et.getChildren();
for(int j=0;j<zjiedian.size();j++){
Element xet = (Element) zjiedian.get(j);
System.out.println(xet.getName());
}
} catch (JDOMException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
} catch (IOException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}
return null;
}
public static void main(String[] args){
DuXMLDoc doc = new DuXMLDoc();
String xml = "<?xml version=\"1.0\" encoding=\"gb2312\"?>"+
"<Result xmlns=\"http://www.fiorano.com/fesb/activity/DBQueryOnInput2/Out\">"+
"<row resultcount=\"1\">"+
"<users_id>1001     </users_id>"+
"<users_name>wangwei   </users_name>"+
"<users_group>80        </users_group>"+
"<users_address>1001号   </users_address>"+
"</row>"+
"<row resultcount=\"1\">"+
"<users_id>1002     </users_id>"+
"<users_name>wangwei   </users_name>"+
"<users_group>80        </users_group>"+
"<users_address>1002号   </users_address>"+
"</row>"+
"</Result>";
doc.xmlElements(xml);
}
}