XML工具代码:SAX从String字符串XML内获取指定节点或属性的值

有如下的XML字符串：

<?xml version="1.0" encoding="UTF-8"?>
<?Label SINFON|RATE|328|SUCCESS ?>

<RateHeader xmlns="rate.fidelio.2.0" rateStatus="ACTIVE" yieldStatus="NONE">
  <hotelCode>SINFON</hotelCode>
  <chainCode>COL</chainCode>
  <rateClass/>
  <RateCategory>
    <catDescription>Rack rates</catDescription>
    <category>RAK</category>
  </RateCategory>
  <rateCode>WHL01</rateCode>
  <startSell>2013-12-02</startSell>
  <endSell>2015-01-22</endSell>
  <advancedBookingDays>2</advancedBookingDays>
  <displayText>Tour Series</displayText>
  <folioText>Room Charge</folioText>
  <shortInfo>tour series/min. 5 tours</shortInfo>
  <minLos>3</minLos>
  <maxLos>20</maxLos>
  <rhythm>W</rhythm>
  <packages>BRF</packages>
  <packages>IBF</packages>
  <marketCode>RAC</marketCode>
  <sourceCode>COL</sourceCode>
  <commission>0</commission>
  <foreignCurrencyDepartmentCode/>
  <departmentCode>100</departmentCode>
  <weekendDepartmentCode>100</weekendDepartmentCode>
  <rateBucket>LOW</rateBucket>
</RateHeader>

要求从中读取rateCode节点的值，实现方法如下：

 public static String getRateCodeFromXmlString(String xmlString)
	 {  
		 	String rateCodeMessage="";
	        StringReader read = new StringReader(xmlString);  
	        //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 saxbBuilder = new SAXBuilder();  
	        try 
	        {  
	            //通过输入源构造一个Document  
	            Document doc = saxbBuilder.build(source);  
	            
	            //取的根元素  
	            Element root = doc.getRootElement();  
	           
	            List<?> node = root.getChildren();  
	       
	            for (int i = 0; i < node.size();i++) 
	            {
	                Element element=(Element)node.get(i);
	               if(element.getName().equals("rateCode")){  
	            	   rateCodeMessage=element.getText();
	               }
	                
	            }             
	            return rateCodeMessage; 
	        } 
	        catch 
	        (JDOMException e) {  
	            e.printStackTrace(); 
	            return "";
	        } catch (IOException e) {  
	            e.printStackTrace();  
	            return "";
	        }  
 }
	

有如下XML字符串：

<?xml version="1.0" encoding="UTF-8"?>
<?Label EXPSD|RTAV|10000281|SUCCESS?>

<RtavMessage xmlns="rtav.fidelio.1.0">
  <HotelReference hotelCode="EXPSD"/>
  <DailyInventories>
    <DailyInventory datum="2014-08-10">
      <RoomTypeInventories>
        <RoomTypeInventory roomType="1KESS" generic="0" physicalRooms="22" roomTypeOverbook="0" outOfOrder="6">
          <Tentative count="0" blockCount="0" resvCount="0"/>
          <Definite count="6" blockCount="0" resvCount="6"/>
        </RoomTypeInventory>
        <RoomTypeInventory roomType="1KSTS" generic="0" physicalRooms="81" roomTypeOverbook="0" outOfOrder="16">
          <Tentative count="0" blockCount="0" resvCount="0"/>
          <Definite count="14" blockCount="0" resvCount="14"/>
        </RoomTypeInventory>
        <RoomTypeInventory roomType="2BSVS" generic="0" physicalRooms="34" roomTypeOverbook="0" outOfOrder="6">
          <Tentative count="0" blockCount="0" resvCount="0"/>
          <Definite count="12" blockCount="0" resvCount="12"/>
        </RoomTypeInventory>
      </RoomTypeInventories>
    </DailyInventory>
    <DailyInventory datum="2014-08-11">
      <RoomTypeInventories>
        <RoomTypeInventory roomType="1KSTS" generic="0" physicalRooms="81" roomTypeOverbook="0" outOfOrder="16">
          <Tentative count="0" blockCount="0" resvCount="0"/>
          <Definite count="14" blockCount="1" resvCount="13"/>
        </RoomTypeInventory>
      </RoomTypeInventories>
    </DailyInventory>
  </DailyInventories>
</RtavMessage>

要求获取roomType属性的值，如果有多个，则以空格间隔，不获取重复的值。实现代码如下：

 public static String getRoomTypeFromXmlString(String xmlString)
	 {  
		 	String roomTypeMessage="";
	        StringReader read = new StringReader(xmlString);  
	        //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 saxbBuilder = new SAXBuilder();  
	        try 
	        {  
	            //通过输入源构造一个Document  
	            Document doc = saxbBuilder.build(source);  
	            
	            //取的根元素  
	            Element root = doc.getRootElement();  
	           
	            List<?> node = root.getChildren();  
	       
	            for (int i = 0; i < node.size();i++) 
	            {
	            
	                Element element=(Element)node.get(i);
	               
	                List<?> subNode = element.getChildren();  
	                
	                for(int j=0;j<subNode.size();j++)
	                {
	                    Element subElement=(Element)subNode.get(j);
	                    List<?> subNode2 = subElement.getChildren();
	                   
	                    for(int k=0;k<subNode2.size();k++)
	                    {
	                    	Element subElement2=(Element)subNode2.get(k);
	                    	List<?> subNode3 = subElement2.getChildren();
	                    	
	                    	for(int m=0;m<subNode3.size();m++)
	                    	{
	                    		Element subElement3=(Element)subNode3.get(m);
	                    		String temp=subElement3.getAttributeValue("roomType");  	
	                    		String temp2=roomTypeMessage.indexOf(temp)>=0?"":(temp+" ");              		
	                    		roomTypeMessage+=temp2;
	                    	}	
	                    }        
	                }         
	            }      
	            return roomTypeMessage; 
	        } 
	        catch 
	        (JDOMException e) {  
	            e.printStackTrace(); 
	            return "";
	        } catch (IOException e) {  
	            e.printStackTrace();  
	            return "";
	        }  
	    }