java xml配合实现读取配置文件登陆

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package com.fenung.summery;import java.io.BufferedReader;import java.io.File;import java.io.IOException;import java.io.InputStreamReader;import java.util.List;import org.dom4j.Document;import org.dom4j.Element;import org.dom4j.Node;import org.dom4j.io.SAXReader;public class systemofuserloading {public static void main(String[] args) throws Exception {/** * 通过键盘获得用户输入的账号和密码 */while (true) {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));System.out.println("请输入账号");String username = br.readLine();System.out.println("请输入密码");String password = br.readLine();/** * 去数据库中查询是否有该用户名和密码 *  */Document doc = new SAXReader().read(new File("./conf/user.xml"));Element userElem = (Element) doc.selectSingleNode("//user[@name='" + username + "' and @password='" + password + "']");if (userElem != null) {// 登录成功System.out.println("登录成功");break;} else {// 登录失败System.out.println("登录失败");}}}}

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