使用dom4j读取xml文件

最新推荐文章于 2022-08-06 11:44:46 发布

原创最新推荐文章于 2022-08-06 11:44:46 发布 · 2.1k 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#xml #string #url #exception #encoding #class

本文介绍如何使用Dom4j库从XML文件中读取数据库连接信息，并通过Java代码将其封装到自定义的JdbcInfo类中。具体包括Dom4j的使用方法、XML配置示例及Java类的设计。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

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 method public 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; } @Override public 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; } }