使用dom4j读取xml文件

首先将dom4j-1.6.1.jar,jaxen-1.1.1.jar两个jar包导入到项目中

 

reader_config.xml

<?xml version="1.0" encoding="UTF-8"?><config><db-info><driver-name>oracle.jdbc.driver.OracleDriver</driver-name><url>jdbc:oracle:thin:@192.168.1.100:1521:orcl</url><username>dys</username><password>dys</password></db-info></config>

 

ConfigReader.java

package com.deng.dys.util;import org.dom4j.Document;import org.dom4j.Element;import org.dom4j.io.SAXReader;public class ConfigReader {private JdbcInfo jdbcInfo ;// 静态的私有的成员变量private static ConfigReader configReader = new ConfigReader();// 不允许别人访问private ConfigReader() {try {Document document = new SAXReader().read(Thread.currentThread().getContextClassLoader().getResourceAsStream("reader_config.xml"));Element driverName = (Element)document.selectObject("/config/db-info/driver-name");Element url = (Element)document.selectObject("/config/db-info/url");Element username = (Element)document.selectObject("/config/db-info/username");Element password = (Element)document.selectObject("/config/db-info/password");jdbcInfo = new JdbcInfo();jdbcInfo.setDriverName(driverName.getStringValue());jdbcInfo.setPassword(password.getStringValue());jdbcInfo.setUrl(url.getStringValue());jdbcInfo.setUsername(username.getStringValue());} catch (Exception e) {e.printStackTrace();}}// 公共的静态的入口点方法public static ConfigReader getInstance() {return configReader;}public JdbcInfo getJdbcInfo(){return jdbcInfo;}//main methodpublic static void main(String args[]){ConfigReader.getInstance().getJdbcInfo();}}

 

将xml的信息封装在一个类中

JdbcInfo.java

 package com.deng.drp.util;public class JdbcInfo {private String driverName;private String url; private String username;private String password;public String getDriverName() {return driverName;}@Overridepublic String toString() {return this.getClass().getName()+"[driverName+ " + this.driverName+ "url= "+ this.url+ "username= "+ this.username+ "password= "+this.password+ "]";}public void setDriverName(String driverName) {this.driverName = driverName;}public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}