Xml解析
Xml解析需要依赖 Dom4j包 备注：记得导入Dom4j包
XML的作用
配置
\.properties
userPage=20
*.xml
数据交换
xml
webservice
json
静态资源文件
css、js、html、图片、视屏*
读取指定位置下的资源文件（db.properties）*
//获取同包下的资源文件，将其转化成流对象
InputStream in=PropertiesDemo.class.getResourceAsStream(“db.properties”);
需要专门的工具类来将流中的数据解释出
Properties p=new Properties();p.load(in);System.out.println(p.getProperty("uname"));System.out.println(p.getProperty("upass"));
资源文件存放在根目录下
InputStream in=PropertiesDemo.class.getResourceAsStream("/db.properties");
何为sourcefolder
代码不将其当做文件来处理，程序员用来做文件归类所用
将资源文件存放在web-inf下
package com.zking.pres;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;public class ParseServlet extends HttpServlet{private static final long serialVersionUID = -1102190634374988166L;@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {// TODO Auto-generated method stubdoPost(req, resp);}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {// TODO Auto-generated method stubServletContext context=req.getServletContext();InputStream in= context.getResourceAsStream("/WEB-INF/db.properties");//需要专门的工具类来将流中的数据解释出来Properties p=new Properties();p.load(in);System.out.println(p.getProperty("uname"));System.out.println(p.getProperty("upass"));}}
配置Xml
<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"><display-name>Xmlpres</display-name><servlet><servlet-name>ParseServlet</servlet-name><servlet-class>com.zking.pres.ParseServlet</servlet-class></servlet><servlet-mapping><servlet-name>ParseServlet</servlet-name><url-pattern>/ParseServlet</url-pattern></servlet-mapping></web-app>
解析指定路径下的资源文件(全部代码)
package com.zking.pres;import java.io.InputStream;import java.util.List;import org.dom4j.Document;import org.dom4j.Element;import org.dom4j.Node;import org.dom4j.io.SAXReader;/** dom4j解析* jdom jdk sax解析* 解析指定路径下的资源文件***/public class XmlDemo {public static void main(String[] args) throws Exception {InputStream in= XmlDemo.class.getResourceAsStream("config.xml");SAXReader saxReader=new SAXReader();Document doc=saxReader.read(in);System.out.println(doc.asXML());//xpath解析 能够将XML格式的串当做目录结构来进行查找List<Element> stuEles= doc.selectNodes("/students/student");for (Element stuEle : stuEles) {if ("s002".equals(stuEle.attributeValue("sid"))) {System.out.println(stuEle.asXML());Element nameELe=(Element) stuEle.selectSingleNode("name");System.out.println(nameELe.asXML());System.out.println(nameELe.getText());}}
简单代码解析
Element stuEle= (Element) doc.selectSingleNode("/students/student[@sid='s002']");System.out.println(stuEle.asXML());
转载于
//www.cnblogs.com/xcn123/p/10999933.html
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