使用Dom4j解析XML文件

项目目录树:

jdbcConfig.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<config>
    <jdbc>
        <username>sushe</username>
        <password>sushe</password>
        <url>jdbc:mysql://172.16.100.10:3306/sushe</url>
        <driverName>com.mysql.jdbc.Driver</driverName>

    </jdbc>
</config>

JdbcBean.java

package com.dlab.bean;

public class JdbcBean {

    private String userName;

    private String password;

    private String url;

    private String driverName;

    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;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getDriverName() {
        return driverName;
    }

    public void setDriverName(String driverName) {
        this.driverName = driverName;
    }

}

JdbcConfigXML.java

package com.dlab.util;

import java.io.InputStream;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import com.dlab.bean.JdbcBean;

/**
 * 读取xml文件工具类
 * @author djoker
 *
 */
public class JdbcConfigXML {

    private JdbcBean jdbcBean;

    public JdbcConfigXML(){
        jdbcBean = new JdbcBean();

        SAXReader reader = new SAXReader();
        InputStream in = Thread.currentThread().getContextClassLoader().getResourceAsStream("jdbcConfig.xml");
        try {
            //读取配置文件
            Document doc = reader.read(in);
            //取得元素
            Element usernameElt = (Element)doc.selectObject("/config/jdbc/username");
            Element passwordElt = (Element)doc.selectObject("/config/jdbc/password");
            Element urlElt = (Element)doc.selectObject("/config/jdbc/url");
            Element driverNameElt = (Element)doc.selectObject("/config/jdbc/driverName");

            //赋值到jdbcBean对象中
            jdbcBean.setUserName(usernameElt.getStringValue());
            jdbcBean.setPassword(passwordElt.getStringValue());
            jdbcBean.setUrl(urlElt.getStringValue());
            jdbcBean.setDriverName(driverNameElt.getStringValue());

        } catch (DocumentException e) {
            e.printStackTrace();
        }
    }

    //返回配置对象jdbcBean
    public JdbcBean getJdbcBean(){
        return jdbcBean;
    }

    //主方法测试
    public static void main(String[] args){
        JdbcConfigXML a = new JdbcConfigXML();
        JdbcBean j = a.getJdbcBean();
        System.out.println(j.getUserName());
        System.out.println(j.getPassword());
        System.out.println(j.getUrl());
        System.out.println(j.getDriverName());
    }
}