XMLParserHelper

package com.huawei.common;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

import org.apache.log4j.Logger;
import org.kxml2.io.KXmlParser;
import org.kxml2.kdom.Document;
import org.kxml2.kdom.Element;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

public class XMLParserHelper
{
private static Logger log = Logger.getLogger(XMLParserHelper.class); //日志

public static final String ORIGINALL_VALUE = "OriginallyValue";
public static final String TRANSFER_VALUE = "TransferValue";

/**
* 获取key节点的值
* @param el
* @param key
* @return
* @throws Exception
*/
public String getText(Element el,String key)
{
Element tmp = null;

if (el == null)
{
return null;
}
else
{
tmp = getElement(el,null,key);
}

StringBuffer buf = new StringBuffer(32);
if (tmp != null)
{
for(int i = 0; i < tmp.getChildCount(); i++)
{
buf.append(tmp.getText(i));
}

}
return buf.toString();
}

/**
* 获取节点的下级节点key的节点
* @param el
* @param namespace
* @param key
* @return
*/
public Element getElement(Element el,String namespace,String key)
{
if (el == null) return null;

try
{
return el.getElement(namespace,key);
}
catch(RuntimeException e)
{
//找不到对应的节点，可以忽略
log.warn("Can not found the node[" + key + "]:" + e.toString());

return null;
}
}

public Element parserXML(String inputXML)
{
//字符串转换为InputStream
ByteArrayInputStream bytes = new ByteArrayInputStream(inputXML.getBytes());
InputStreamReader reader = new InputStreamReader(bytes);

//KXml解析器
KXmlParser parser = new KXmlParser ();

//转换为Element
Document doc = new Document();

try
{
parser.setInput(reader);
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);

doc.parse(parser);
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
log.error("parse xml IOException:",e);
}
catch (XmlPullParserException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
log.error("parse xml XmlPullParserException:",e);
}

return doc.getRootElement();
}
}