JAVA项目使用jdom初始化xml配置文件类
?单例模式加载配置文件类
?
使用架包：jdom-2.0.5.jar、log4j-1.2.17.jar
代码：
package com.wjq.project.loadFile;import java.io.InputStream;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Map;import org.apache.log4j.Logger;import org.jdom2.Document;import org.jdom2.Element;import org.jdom2.input.SAXBuilder;/** * @Title：JAVA项目初始化xml配置文件类 * @Description: 使用jdom解析xml配置文件； 使用单例模式初始化类; 定时重新加载配置文件，时间可配 * @author wjq * @date 2013-07-19 */public class LoadXmlFile_jdom {//日志private static Logger log = Logger.getLogger(LoadXmlFile_jdom.class);//配置文件private static final String CONFIG_FILE = "loadFile_loadXmlFile.xml";//dom4j 对象private Document document=null;//IP地址private String ip = null;//端口号private String port = null;//重启加载配置文件周期，默认值：12，单位：小时private int reloadTime=12;//告警级别转换private Map<String, String> alarmLevelsMap=new HashMap<String, String>();//工单状态数据转换private Map<String, String> sheetStatusTransMap=new HashMap<String, String>();/////////////////////////////////////////////单例模式 start//////////////////////////////////////////////** * 私有化构造方法 */private LoadXmlFile_jdom(){log.info("加载配置文件: "+CONFIG_FILE);loadConfig();//开启定时加载配置文件的线程Thread reloadConfFile = new Thread(new ReloadConfFile());reloadConfFile.start();}/** * 内部静态类，实例化本类对象 * @author wjq * */public static class ClassInstance{//在内部静态类中实例化LoadXmlFile对象private static final LoadXmlFile_jdom instance=new LoadXmlFile_jdom();}/** * 对外提供本类实例化对象 * @return */public static LoadXmlFile_jdom getInstance(){return ClassInstance.instance;}/////////////////////////////////////////////单例模式 end//////////////////////////////////////////////** * 加载配置文件信息 */ private void loadConfig() { try { InputStream inputStream = LoadXmlFile_jdom.class.getResourceAsStream("/project/"+CONFIG_FILE); if(inputStream!=null){ SAXBuilder builder = new SAXBuilder(); this.document = builder.build(inputStream); if(document==null){ return; } this.ip=loadSingleNode("myProject/ip"); this.port=loadSingleNode("myProject/port"); this.reloadTime=Integer.valueOf(loadSingleNode("myProject/reloadTime")); this.alarmLevelsMap=loadAttributeMap(alarmLevelsMap,"myProject/alarmLevels"); this.sheetStatusTransMap=loadTextMap(sheetStatusTransMap,"myProject/sheetStatusTrans"); }else{ log.error("配置文件不存在，请确认已经将配置文件["+CONFIG_FILE+"]已经放在[project]目录下"); }} catch (Exception e) {log.error("解析配置文件["+CONFIG_FILE+"]异常",e);} } /** * ReloadConfFile thread * 定时重新加载xml配置文件 线程 * 默认每隔12小时加载一次xml配置文件， * @author wjq */private class ReloadConfFile implements Runnable {public void run() {// TODO Auto-generated method stubwhile(true) {try {Thread.sleep(reloadTime*60*60*1000);} catch (InterruptedException e) {}log.info("重新加载配置文件:"+CONFIG_FILE);loadConfig();}}} /** * 获取单个节点的文本值 * @param nodePath * @return */ private String loadSingleNode(String nodePath){ Element root = document.getRootElement();String[] elementsName = nodePath.split("\\/");for (int i = 0; i < elementsName.length; i++) {root = root.getChild(elementsName[i]);}String nodeText =root.getTextTrim();log.info(root.getName()+"="+nodeText);return nodeText; } /** * 加载from、to在元素属性节点上的转换关系 * from为key、to为value * @param fromToMap 存储对应关系的map * @param nodePath 节点路径 * @return */private Map<String, String> loadAttributeMap(Map<String, String> fromToMap,String nodePath){//日志信息String logMessage="";//先清空Map内容fromToMap.clear();Element root = document.getRootElement();String[] elementsName = nodePath.split("\\/");for (int i = 0; i < elementsName.length; i++) {root = root.getChild(elementsName[i]);}logMessage=root.getName()+":[";List childrenList = root.getChildren();Iterator iter=childrenList.iterator();while(iter.hasNext()) {Element el=(Element)iter.next();String key= el.getAttributeValue("from").trim();String value= el.getAttributeValue("to").trim();fromToMap.put(key, value);logMessage=logMessage+";from="+key+",to="+value;}logMessage=logMessage.replaceFirst(";", "")+"]";log.info(logMessage);return fromToMap;}/** * 加载from、to为单独元素的转换关系 * from为key、to为value * @param fromToMap 存储对应关系的map * @param nodePath 节点路径 * @return */private Map<String, String> loadTextMap(Map<String, String> fromToMap,String nodePath){//日志信息String logMessage="";//先清空Map内容fromToMap.clear();Element root = document.getRootElement();String[] elementsName = nodePath.split("\\/");for (int i = 0; i < elementsName.length; i++) {root = root.getChild(elementsName[i]);}logMessage=root.getName()+":[";List childrenList = root.getChildren();Iterator iter=childrenList.iterator();while(iter.hasNext()) {Element el=(Element)iter.next();String key= el.getChild("from").getTextTrim();String value= el.getChild("to").getTextTrim();fromToMap.put(key, value);logMessage=logMessage+";from="+key+",to="+value;}logMessage=logMessage.replaceFirst(";", "")+"]";log.info(logMessage);return fromToMap;} public String getIp() {return ip;}public void setIp(String ip) {this.ip = ip;}public String getPort() {return port;}public void setPort(String port) {this.port = port;}public Map<String, String> getAlarmLevelsMap() {return alarmLevelsMap;}public void setAlarmLevelsMap(Map<String, String> alarmLevelsMap) {this.alarmLevelsMap = alarmLevelsMap;}public Map<String, String> getSheetStatusTransMap() {return sheetStatusTransMap;}public void setSheetStatusTransMap(Map<String, String> sheetStatusTransMap) {this.sheetStatusTransMap = sheetStatusTransMap;}/** * @param args */public static void main(String[] args) {System.out.println("使用jdom加载xml配置文件");LoadXmlFile_jdom loadXmlFile=LoadXmlFile_jdom.getInstance();}}?
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配置文件：<?xml version="1.0" encoding="Gb2312"?><config><myProject><!-- IP地址 --><ip>127.0.0.1</ip><!-- 端口号 --><port>51088</port><!-- 第一种数据转换方法 from为key、to为value--><alarmLevels><level from="紧急告警" to="1" /><level from="重要告警" to="2" /><level from="次要告警" to="3" /><level from="警告告警" to="4" /></alarmLevels><!-- 第二种数据转换方法 from为key、to为value--><sheetStatusTrans><sheetStatusRecord><from>草稿</from><to>1</to></sheetStatusRecord><sheetStatusRecord><from>一级处理中</from><to>2</to></sheetStatusRecord><sheetStatusRecord><from>二级处理中</from><to>3</to></sheetStatusRecord><sheetStatusRecord><from>三级处理中</from><to>4</to></sheetStatusRecord></sheetStatusTrans><!-- 重新读取配置文件周期，默认值：12，单位:小时 --><reloadTime>12</reloadTime></myProject></config>?