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 TestXML {
    public List xmlElements(String xmlDoc) {
        //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
                /**//*
                 * 无命名空间定义时
                 * et.getChild("users_id").getText();
                 * et.getChild("users_address",ns).getText()
                 */
                /*System.out.println(et.getChild("users_id",ns).getText());
                System.out.println(et.getChild("users_address",ns).getText());*/
                System.out.println(et.getChild("p_id",ns).getText());
                System.out.println(et.getChild("ctnno",ns).getText());
            }
            /**//*
             * 如要取<row>下的子元素的名称
             */
            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){
     TestXML doc = new TestXML();
        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>";
        String xml1 = "<?xml version=\"1.0\" encoding=\"UTF-16LE\" standalone=\"no\"?>" +
          "<d_fsgl_fee_count_for_xml>" +
          "  <d_fsgl_fee_count_for_xml_row>" +
          "  <p_id>JD1302130002</p_id>" +
          "  <ctnno>CXDU1499549</ctnno>" +
          "  <fee_type>单</fee_type>" +
          "  <start_time>2013-02-09 00:00:00</start_time>" +
          "  <end_time>2013-02-13 00:00:00</end_time>" +
          "  <fee>4</fee>" +
          "  <fee_count>16</fee_count>" +
          "  <cpid></cpid>" +
          "  <fee_name>堆存费</fee_name>" +
          "  <fee_rate_id></fee_rate_id>" +
          "  <jffs>1</jffs>" +
          "  <if_hand>0</if_hand>" +
          "  <sfid>FDZT1302180104</sfid>" +
          "  <wt_company>QT</wt_company>" +
          "  <opid>928</opid>" +
          "  <cy>D</cy>" +
          "  <if_bf></if_bf>" +
          "  <days_count>4</days_count>" +
          "  <if_collect>1</if_collect>" +
          "  <if_dd></if_dd>" +
          "  <dd_fee_name></dd_fee_name>" +
          "  <spec_sign>五洲代垫</spec_sign>" +
          " </d_fsgl_fee_count_for_xml_row>" +
          " <d_fsgl_fee_count_for_xml_row>" +
          "  <p_id>JD1302130002</p_id>" +
          "  <ctnno>CXDU1499549</ctnno>" +
          "  <fee_type>周</fee_type>" +
          "  <start_time>2013-02-13 00:00:00</start_time>" +
          "  <end_time>2013-02-20 00:00:00</end_time>" +
          "  <fee>4</fee>" +
          "  <fee_count>32</fee_count>" +
          "  <cpid></cpid>" +
          "  <fee_name>堆存费</fee_name>" +
          "  <fee_rate_id>67</fee_rate_id>" +
          "  <jffs>1</jffs>" +
          "  <if_hand>0</if_hand>" +
          "  <sfid>FDZT1302180104</sfid>" +
          "  <wt_company>QT</wt_company>" +
          "  <opid>928</opid>" +
          "  <cy>D</cy>" +
          "  <if_bf></if_bf>" +
          "  <days_count>8</days_count>" +
          "  <if_collect>1</if_collect>" +
          "  <if_dd></if_dd>" +
          "  <dd_fee_name></dd_fee_name>" +
          "  <spec_sign></spec_sign>" +
          " </d_fsgl_fee_count_for_xml_row>"  +
          "</d_fsgl_fee_count_for_xml>";
        doc.xmlElements(xml1);
    }
}

d

2.获得根元素
Node root = doc.getRootElement();
     或 Element r = doc.getRootElement();

3.取得某节点的单个子节点
Element root = root.getRootElement();
Element memberElm=root.element("member");// "member"是节点名

4.取得节点的文字
String text=memberElm.getText();

5.取得某节点下名为"book"的所有字节点并进行遍历
Element r = doc.getRootElement();
List titles = r.elements("book");
for(int i=0;i<titles.size();i++){
     System.out.println(((Element)titles.get(i)).asXML());
}
6.在某节点下添加子节点.
Element ageElm = newMemberElm.addElement("age");

7.设置节点文字.
ageElm.setText("29");

8.删除某节点.
parentElm.remove(childElm);// childElm是待删除的节点,parentElm是其父节点

三.属性相关.
1.取得某节点下的某属性
            Element root=document.getRootElement();   
            Attribute attribute=root.attribute("size");// 属性名name
2.取得属性的文字
            String text=attribute.getText();
也可以用:
String text2=root.element("name").attributeValue("firstname");这个是取得根节点下name字节点的属性firstname的值.

3.遍历某节点的所有属性
            Element root=document.getRootElement();   
            for(Iterator it=root.attributeIterator();it.hasNext();){
                Attribute attribute = (Attribute) it.next();
                String text=attribute.getText();
                System.out.println(text);
            }
4.设置某节点的属性和文字.
newMemberElm.addAttribute("name", "sitinspring");
5.设置属性的文字
            Attribute attribute=root.attribute("name");
            attribute.setText("sitinspring");
6.删除某属性
            Attribute attribute=root.attribute("size");// 属性名name
            root.remove(attribute);
四.将文档写入XML文件.
1.文档中全为英文,不设置编码,直接写入的形式.
XMLWriter writer = new XMLWriter(new FileWriter("output.xml"));
writer.write(document);
writer.close();
2.文档中含有中文,设置编码格式写入的形式.
            OutputFormat format = OutputFormat.createPrettyPrint();
            format.setEncoding("GBK");    // 指定XML编码       
            XMLWriter writer = new XMLWriter(new FileWriter("output.xml"),format);
           
            writer.write(document);
            writer.close();
五.字符串与XML的转换
1.将字符串转化为XML
String text = "<members> <member>sitinspring</member> </members>";
Document document = DocumentHelper.parseText(text);
2.将文档或节点的XML转化为字符串.
            SAXReader reader = new SAXReader();
            Document document = reader.read(new File("input.xml"));           
            Element root=document.getRootElement();               
            String docXmlText=document.asXML();
            String rootXmlText=root.asXML();
            Element memberElm=root.element("member");
            String memberXmlText=memberElm.asXML();
六.使用XPath快速找到节点.
读取的XML文档示例
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>MemberManagement</name>
<comment></comment>
<projects>
    <project>PRJ1</project>
    <project>PRJ2</project>
    <project>PRJ3</project>
    <project>PRJ4</project>
</projects>
<buildSpec>
    <buildCommand>
      <name>org.eclipse.jdt.core.javabuilder</name>
      <arguments>
      </arguments>
    </buildCommand>
</buildSpec>
<natures>
    <nature>org.eclipse.jdt.core.javanature</nature>
</natures>
</projectDescription>

使用XPath快速找到节点project.
public static void main(String[] args){
    SAXReader reader = new SAXReader();
   
    try{
      Document doc = reader.read(new File("sample.xml"));
     
      List projects=doc.selectNodes("/projectDescription/projects/project");
     
      Iterator it=projects.iterator();
     
      while(it.hasNext()){
        Element elm=(Element)it.next();      
        System.out.println(elm.getText());
      }
     
    }
    catch(Exception ex){
       ex.printStackTrace();
    }
}