dom4j解析xml方法
简介：
package paserImpl;import java.io.ByteArrayOutputStream;import java.util.ArrayList;import java.
package
paserImpl;
import
java.io.ByteArrayOutputStream;
import
java.util.ArrayList;
import
java.util.Collection;
import
java.util.HashMap;
import
java.util.Iterator;
import
java.util.List;
import
java.util.Map;
import
java.util.regex.Matcher;
import
java.util.regex.Pattern;
import
org.dom4j.Document;
import
org.dom4j.DocumentHelper;
import
org.dom4j.Element;
import
org.dom4j.Node;
import
org.dom4j.io.OutputFormat;
import
org.dom4j.io.XMLWriter;
/** */
/**
* XML描述的解析
*
*@author zxs_9999
*/
public
class
GenericXmlMessage
...
{
private Document doc;
private Map internalMsg = new HashMap();
private Collection cdataPathList = new ArrayList(); //只为CDATA的节点路径列表
private static final Pattern pattern = Pattern.compile("/[/d/]$");
public GenericXmlMessage() ...{
doc = DocumentHelper.createDocument();
internalMsg.put("CDATAPathList",cdataPathList);
}
public GenericXmlMessage(Document doc) ...{
this.doc = doc;
}
/** *//**
* 得到默认类别的键值
*
* @param key String
* @return Object
*/
public Object get(String key) ...{
return get("value", key);
}
/** *//**
* 得到默认类别的键值
*
* @param key String
* @return Object
*/
public String getString(String key) ...{
return (String) get("value", key);
}
/** *//**
* 得到某类别的键值
*/
public Object get(String category, String key) ...{
if (category.equals("list")) ...{
List list = doc.selectNodes(key);
List values = new ArrayList();
for (Iterator itr = list.iterator(); itr.hasNext();) ...{
Element element = (Element) itr.next();
values.add(element.getText());
}
return values;
} else ...{
if (key.startsWith("//")) ...{
//XML节点
Node node = doc.selectSingleNode(key);
if (node == null) ...{
return "";
} else ...{
if(node.getText()!= null && node.getText().length()> 0)
...{
//获取节点值
return node.getText();
}
else if(((Element)node).attribute("val") != null && ((Element)node).attribute("val").getValue().length()>0)
...{
//获取属性
return ((Element)node).attribute("val").getValue();
}
else
...{
return "";
}
}
} else ...{
//非xml节点
return internalMsg.get(key);
}
}
}
/** *//**
* 得到某类别的键值
*/
public String getString(String category, String key) ...{
if (category.equals("list")) ...{
throw new IllegalArgumentException("not allow list here");
} else ...{
if (key.startsWith("//")) ...{
//XML节点
Node node = doc.selectSingleNode(key);
if (node == null) ...{
return "";
} else ...{
return node.getText();
}
} else ...{
//非xml节点
return (String) internalMsg.get(key);
}
}
}
/** *//**
* 设置键值
*/
public void set(String key, Object value) ...{
set("TEXT", key, value);
}
private Node createNewNodeByXPath(String xpath) ...{
if (xpath.startsWith("//")) ...{
String[] nodes = xpath.substring(2, xpath.length()).split("/");
String root = nodes[0];
Element currentElement = doc.getRootElement();
if (currentElement == null) ...{
currentElement = doc.addElement(root);
}
for (int i = 1; i < nodes.length; i++) ...{
Matcher matcher = pattern.matcher(nodes[i]);
if (matcher.find()) ...{
//多个要素
String numberStr = matcher.group(0);
int n = Integer.parseInt(numberStr.substring(1, numberStr.length() - 1));
String elementName = nodes[i].substring(0, matcher.start());
int size = currentElement.elements(elementName).size();
if (size < n) ...{
for (int j = size; j < n; j++) ...{
currentElement.addElement(elementName);
}
}
currentElement = (Element) currentElement.elements(elementName).get(n - 1);
} else ...{
//单个要素
Element element = currentElement.element(nodes[i]);
if (element == null) ...{
element = currentElement.addElement(nodes[i]);
}
currentElement = element;
}
}
return currentElement;
}
return null;
}
/** *//**
* 设置键值
*/
public void set(String category, String key, Object value) ...{
if (key.startsWith("//")) ...{
//XML节点
Node node = doc.selectSingleNode(key);
if (node == null) ...{
node = createNewNodeByXPath(key);
}
if (category.equalsIgnoreCase("CDATA")) ...{
((Element) node).addCDATA((String)value);
cdataPathList.add(key);
//System.out.println(node);
} else ...{
if(get("value", "ClientType") != null && ((String)get("value", "ClientType")).equals("1"))
...{
System.out.println("当前是字符终端3");
//当前是字符终端
((Element) node).addAttribute("val",(String) value);
}
else
...{
node.setText((String) value);
}
}
} else ...{
//非xml节点
internalMsg.put(key, value);
}
}
/** *//**
* 清除所有信息
*/
public void clear() ...{
doc.clearContent();
}
/** *//**
* 得到所有的category
*/
public Collection findAllCategories() ...{
return new ArrayList();
}
/** *//**
* 得到某一个category的所有值
*/
public Collection findAllKeysByCategory(String category) ...{
return new ArrayList();
}
/** *//**
* 得到XML描述
*
* @return 返回XML
*/
public String asXML() ...{
XMLWriter writer = null;
/** *//** 格式化输出,类型IE浏览一样 */
OutputFormat format = OutputFormat.createPrettyPrint();
/** *//** 指定XML编码 */
format.setEncoding("GBK");
writer = new XMLWriter();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try
...{
writer= new XMLWriter(baos,format);
writer.write(doc);
writer.close();
}
catch(Exception ex)
...{
System.out.println("发生错误！");
}
//return doc.asXML();
return baos.toString();
}
}
