正则表达式获取XML中得节点值

不知道是要用什么语言来做，只能简单说说了。

正则表达式“<requserid>([^<]+)</requserid>"，过滤XML后从分组1中就可以取到535了

/// <summary>

/// XmlDocument扩展类

///

/// 目的:用于优化和减少代码书写量

/// 备注:Element 译为:元素

/// Document 译为:文档

/// Node 译为:节点

/// </summary>

public class XmlDocumentExtender : XmlDocument

{

public XmlDocumentExtender()

: base()

{

}

#region 扩展的构造函数

#if NET1

public XmlDocumentExtender(XmlNameTable nt)

: base(new XmlImplementation())

{

}

#else

public XmlDocumentExtender(XmlNameTable nt)

: base(new XmlImplementation(nt))

{

}

#endif

#endregion

/// <summary>

/// 加载的文件名(含路径)

/// </summary>

/// <param name="filename"></param>

public override void Load(string filename)

{

if (MauniteCommonFileUtilsFileExists(filename))

{

baseLoad(filename);

}

else

{

throw new Exception("文件: " + filename + " 不存在!");

}

}

/// <summary>

/// 在指定的Xml元素下,添加子Xml元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml元素</param>

/// <param name="childElementName">要添加的Xml元素名称</param>

/// <param name="childElementValue">要添加的Xml元素值</param>

/// <returns></returns>

public bool AppendChildElementByNameValue(ref XmlElement xmlElement, string childElementName, object childElementValue)

{

return AppendChildElementByNameValue(ref xmlElement, childElementName, childElementValue, false);

}

/// <summary>

/// 在指定的Xml元素下,添加子Xml元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml元素</param>

/// <param name="childElementName">要添加的Xml元素名称</param>

/// <param name="childElementValue">要添加的Xml元素值</param>

/// <param name="IsCDataSection">是否是CDataSection类型的子元素</param>

/// <returns></returns>

public bool AppendChildElementByNameValue(ref XmlElement xmlElement, string childElementName, object childElementValue, bool IsCDataSection)

{

if ((xmlElement != null) && (xmlElementOwnerDocument != null))

{

//是否是CData类型Xml元素

if (IsCDataSection)

{

XmlCDataSection tempdata = xmlElementOwnerDocumentCreateCDataSection(childElementName);

tempdataInnerText = FiltrateControlCharacter(childElementValueToString());

XmlElement childXmlElement = xmlElementOwnerDocumentCreateElement(childElementName);

childXmlElementAppendChild(tempdata);

xmlElementAppendChild(childXmlElement);

}

else

{

XmlElement childXmlElement = xmlElementOwnerDocumentCreateElement(childElementName);

childXmlElementInnerText = FiltrateControlCharacter(childElementValueToString());

xmlElementAppendChild(childXmlElement);

}

return true;

}

else

{

return false;

}

}

/// <summary>

/// 在指定的Xml结点下,添加子Xml元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml节点</param>

/// <param name="childElementName">要添加的Xml元素名称</param>

/// <param name="childElementValue">要添加的Xml元素值</param>

/// <returns></returns>

public bool AppendChildElementByNameValue(ref XmlNode xmlNode, string childElementName, object childElementValue)

{

return AppendChildElementByNameValue(ref xmlNode, childElementName, childElementValue, false);

}

/// <summary>

/// 在指定的Xml结点下,添加子Xml元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml节点</param>

/// <param name="childElementName">要添加的Xml元素名称</param>

/// <param name="childElementValue">要添加的Xml元素值</param>

/// <param name="IsCDataSection">是否是CDataSection类型的子元素</param>

/// <returns></returns>

public bool AppendChildElementByNameValue(ref XmlNode xmlNode, string childElementName, object childElementValue, bool IsCDataSection)

{

if ((xmlNode != null) && (xmlNodeOwnerDocument != null))

{

//是否是CData类型Xml结点

if (IsCDataSection)

{

XmlCDataSection tempdata = xmlNodeOwnerDocumentCreateCDataSection(childElementName);

tempdataInnerText = FiltrateControlCharacter(childElementValueToString());

XmlElement childXmlElement = xmlNodeOwnerDocumentCreateElement(childElementName);

childXmlElementAppendChild(tempdata);

xmlNodeAppendChild(childXmlElement);

}

else

{

XmlElement childXmlElement = xmlNodeOwnerDocumentCreateElement(childElementName);

childXmlElementInnerText = FiltrateControlCharacter(childElementValueToString());

xmlNodeAppendChild(childXmlElement);

}

return true;

}

else

{

return false;

}

}

/// <summary>

/// 通过数据行向当前XML元素下追加子元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml元素</param>

/// <param name="dcc">当前数据表中的列集合</param>

/// <param name="dr">当前行数据</param>

/// <returns></returns>

public bool AppendChildElementByDataRow(ref XmlElement xmlElement, DataColumnCollection dcc, DataRow dr)

{

return AppendChildElementByDataRow(ref xmlElement, dcc, dr, null);

}

/// <summary>

/// 通过数据行向当前XML元素下追加子元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml元素</param>

/// <param name="dcc">当前数据表中的列集合</param>

/// <param name="dr">当前行数据</param>

/// <param name="removecols">不会被追加的列名</param>

/// <returns></returns>

public bool AppendChildElementByDataRow(ref XmlElement xmlElement, DataColumnCollection dcc, DataRow dr, string removecols)

{

if((xmlElement != null)&&(xmlElementOwnerDocument != null))

{

foreach (DataColumn dc in dcc)

{

if ((removecols == null) ||

(removecols == "") ||

(("," + removecols + ",")ToLower()IndexOf("," + dcCaptionToLower() + ",") < 0))

{

XmlElement tempElement = xmlElementOwnerDocumentCreateElement(dcCaption);

tempElementInnerText = FiltrateControlCharacter(dr[dcCaption]ToString()Trim());

xmlElementAppendChild(tempElement);

}

}

return true;

}

else

{

return false;

}

}

/// <summary>

/// 实始化节点, 当节点存在则清除当前路径下的所有子结点, 如不存在则直接创建该结点

/// </summary>

/// <param name="xmlpath"></param>

/// <returns></returns>

public XmlNode InitializeNode(string xmlpath)

{

XmlNode xmlNode = thisSelectSingleNode(xmlpath);

if (xmlNode != null)

{

xmlNodeRemoveAll();

}

else

{

xmlNode = CreateNode(xmlpath);

}

return xmlNode;

}

/// <summary>

/// 删除指定路径下面的所有子结点和自身

/// </summary>

/// <param name="xmlpath">指定路径</param>

public void RemoveNodeAndChildNode(string xmlpath)

{

XmlNodeList xmlNodeList = thisSelectNodes(xmlpath);

if (xmlNodeListCount > 0)

{

foreach (XmlNode xn in xmlNodeList)

{

xnRemoveAll();

xnParentNodeRemoveChild(xn);

}

}

}

/// <summary>

/// 创建指定路径下的节点

/// </summary>

/// <param name="xmlpath">节点路径</param>

/// <returns></returns>

public XmlNode CreateNode(string xmlpath)

{

string[] xpathArray = xmlpathSplit('/');

string root = "";

XmlNode parentNode = this;

//建立相关节点

for (int i = 1; i < xpathArrayLength; i++)

{

XmlNode node = thisSelectSingleNode(root + "/" + xpathArray[i]);

// 如果当前路径不存在则建立,否则设置当前路径到它的子路径上

if (node == null)

{

XmlElement newElement = thisCreateElement(xpathArray[i]);

parentNodeAppendChild(newElement);

}

//设置低一级的路径

root = root + "/" + xpathArray[i];

parentNode = thisSelectSingleNode(root);

}

return parentNode;

}

/// <summary>

/// 得到指定路径的节点值

/// </summary>

/// <param name="xmlnode">要查找节点</param>

/// <param name="path">指定路径</param>

/// <returns></returns>

public string GetSingleNodeValue(XmlNode xmlnode, string path)

{

if (xmlnode == null)

{

return null;

}

if (xmlnodeSelectSingleNode(path) != null)

{

if (xmlnodeSelectSingleNode(path)LastChild != null)

{

return xmlnodeSelectSingleNode(path)LastChildValue;

}

else

{

return "";

}

}

return null;

}

/// <summary>

/// 过滤控制字符,包括0x00 - 0x08,0x0b - 0x0c,0x0e - 0x1f

/// </summary>

/// <param name="content">要过滤的内容</param>

/// <returns>过滤后的内容</returns>

private string FiltrateControlCharacter(string content)

{

return RegexReplace(content, "[\x00-\x08|\x0b-\x0c|\x0e-\x1f]", "");

}

}

你说的是获取指定id下面的节点的属性值吧！

程序如下，其中equal（“”）双引号中的值为节点的属性值

属性值获取如下：

package saxbuilderibmxmlproperty;

import javaioFile;

import javaioIOException;

import javautilIterator;

import orgdom4jAttribute;

import orgdom4jDocument;

import orgdom4jDocumentException;

import orgdom4jElement;

import orgdom4jioSAXReader;

import orgjdomJDOMException;

import orgjdominputSAXBuilder;

public class XmlProperty {

public Element element;

String path = "D:\\xml\\axml";

public void getElementProperty() {

File file = new File(path);

try {

SAXReader reader = new SAXReader();

Document dc = readerread(file);

Element e = dcgetRootElement();

// 节点值

Element child = (Element) egetQName("COMMAND");

Systemoutprintln(childtoString());

// 一级节点

for (Iterator iterator = eelementIterator(); iteratorhasNext();) {

Element el = (Element) iteratornext();

// 一级节点的属性信息

for (Iterator iterator2 = elattributeIterator(); iterator2

hasNext();) {

Attribute attribute = (Attribute) iterator2next();

if(attributegetName()equals("bodyCategory")){

Systemoutprintln("attributegetName()一级节点的属性信息+"+attributegetName()+attributegetValue());

}else{

Systemoutprintln("attributegetName()一级节点的属性信息+"+attributegetName()+attributegetValue());

}

// 二级节点

for (Iterator iterator3 = elelementIterator(); iterator3

hasNext();) {

Element ele = (Element) iterator3next();

// 二级节点的属性信息

for (Iterator iterator4 = eleattributeIterator(); iterator4

hasNext();) {

Attribute attribute1 = (Attribute) iterator4next();

if(attribute1getName()equals("cmdType")){

Systemoutprintln("attribute1getName()二级节点的属性信息+"+attribute1getName()+"+"+attribute1getValue());

}else{

Systemoutprintln("attribute1getName()二级节点的属性信息+"+attribute1getName()+"+"+attribute1getValue());

}

}

}

}

} catch (DocumentException e) {

// TODO Auto-generated catch block

eprintStackTrace();

}

}

}

//下边的是具体的代码，不过先要添加using SystemXml;我用的是05没有这个命名空间，还有要注意你的xml文件的路径，我放在了App_Data下边，名字为Baiduxml，你要进行修改。还有问题可以加我QQ304631331

XmlDocument doc = new XmlDocument();

string XmlFilePath = ServerMapPath("App_Data/Baiduxml");

docLoad(XmlFilePath);

string str = "";

XmlNode rootnode = docSelectSingleNode("Menu");

foreach (XmlNode node in rootnodeChildNodes)

{

str += nodeAttributes["name"]Value+"<br/>";

}

ResponseWrite(str);

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