XML解析

 

读取指定文件下的资源文件（db.propeties）
1、读取同包下的资源文件
2、资源文件存放在根目录下

properties.class

 

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import java.io.IOException; import java.io.InputStream; import java.util.Properties;   public class properties {       public static void main(String[] args) throws IOException {          //1、读取根目录下文件（db.propeties）          InputStream in=properties.class.getResourceAsStream("/db.properties");     　　　　//2、读取同包下文件（db.propeties） 　　　　//InputStream in=properties.class.getResourceAsStream("db.properties");                  Properties p=new Properties();         p.load(in);         System.out.println(p.getProperty("uname"));         System.out.println(p.getProperty("upass"));           }       }

 

　　

 

3、资源文件存放在web-inf文件（db.propeties）

1	parseServlet .java

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package com.zking.properties;   import java.io.IOException; import java.io.InputStream; import java.util.Properties;   import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;   /**  * Servlet implementation class parseServlet  */ public class parseServlet extends HttpServlet {           private static final long serialVersionUID = 1L;              /**      * @see HttpServlet#HttpServlet()      */     public parseServlet() {         super();         // TODO Auto-generated constructor stub     }       /**      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)      */     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {         doPost(request, response);                  }                 /**      * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)      */     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {           ServletContext context=request.getServletContext();                   InputStream in=context.getResourceAsStream("/WEB-INF/db.properties");                   Properties p=new Properties();         p.load(in);         System.out.println(p.getProperty("uname"));         System.out.println(p.getProperty("upass"));             }   }

　　

dom4j + xpase解析XML

1	XMLDemo .class

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package com.zking.properties;   import java.io.InputStream; import java.util.List;   import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.Element; import org.dom4j.Node; import org.dom4j.io.SAXReader;   /*  * dom4j  * jdom jdk  * sax解析  *  * 解析指定路径下的支援  *  */   public class XMLDemo { public static void main(String[] args) throws Exception {             InputStream in= XMLDemo.class.getResourceAsStream("students.xml");                SAXReader sax=new SAXReader();         Document doc=sax.read(in);         System.out.println(doc.asXML()); //      xpath解析 //      xpath解析能够将xml格式的串当作目录结构来进行查找 //      List<Element> list=doc.selectNodes("/students/student"); //      for (Element element : list) { //              if("s002".equals(element.attributeValue("sid"))) { //          System.out.println(element.asXML()); //          Element name=(Element)element.selectSingleNode("name"); //          System.out.println(name.asXML()); //          System.out.println(name.getText()); //          //              } //      }                   Element  node=(Element) doc.selectSingleNode("/students/student[@sid='s002']");         System.out.println(node.asXML());               }           }

 

xml解析

Temp.class

1、获取所有action中的type的值

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public static void main(String[] args) throws Exception {         InputStream in=XmlDemo.class.getResourceAsStream("config.xml");                SAXReader sax= new SAXReader();         Document doc=sax.read(in);   //       获取所有action中的type的值         List<Element> stuEles= doc.selectNodes("/config/action");         for (Element stuEle : stuEles) {             String type=stuEle.attributeValue("type");             System.out.println(type);                           }    }

　　

2、获取第二个action中的type的值

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public static void main(String[] args) throws Exception {   List<Element> stuEles= doc.selectNodes("/config/action");         for (Element stuEle : stuEles) {             if("/loginAction".equals(stuEle.attributeValue("path"))) {                  String type=stuEle.attributeValue("type");                  System.out.println(type);                }             } }

　　

3、获取第二个action的所有forward的path

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public static void main(String[] args) throws Exception {     List<Element> stuEles= doc.selectNodes("/config/action");         for (Element stuEle : stuEles) {             if("/loginAction".equals(stuEle.attributeValue("path"))) {                 List<Element> ford=(List<Element>) stuEle.selectNodes("forward");                 for (Element element : ford) {                    String path=element.attributeValue("path");                    System.out.println(path);                 }             }         } }

　　

4、获取第二个action的第二个forward的path

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public static void main(String[] args) throws Exception {   List<Element> stuEles= doc.selectNodes("/config/action");         for (Element stuEle : stuEles) {             if("/loginAction".equals(stuEle.attributeValue("path"))) {                List<Element> ford=(List<Element>) stuEle.selectNodes("forward");                 for (Element element : ford) {                     if("success".equals(element.attributeValue("name"))) {                     String path=element.attributeValue("path");                     System.out.println(path);                     }                 }             }         }         }