Java J2EE读取配置文件

package com;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import javax.naming.InitialContext;import java.io.File;import java.io.FileFilter;import java.io.FileReader;import java.util.Iterator;import java.util.Map;import java.util.Map.Entry;import java.util.Properties;import java.util.concurrent.ConcurrentHashMap;/** * 读取配置文件 */public class ReadProperty {private static final Logger logger = LoggerFactory.getLogger(Globals.class);private static String confHome = null;//并发，线程安全的mapprivate static Map<String, String> confProperties = new ConcurrentHashMap<>();private static Map<String, File> confFiles = new ConcurrentHashMap<>();//加载成功private static boolean loadingSuccess = true;    /**     * 加载配置文件 */private synchronized static void loadProperties() {//如果没有加载成功，返回if ( !loadingSuccess ) {            return;}//如果加载的文件是空的if (confProperties.isEmpty()) {//如果电脑环境变量中为空if (confHome == null) {        confHome = System.getProperty("CONF_HOME");        }        //如果web.xml中没配        if (confHome == null) {            try {                InitialContext context = new InitialContext();                confHome = (String)context.lookup("java:comp/env/CONF_HOME");            } catch(Exception e) {            logger.warn("Can not find jini name {}", "java:comp/env/CONF_HOME");            }        }        //如果还是为空，就找本机路径下的ProtectionDomain/CodeSource/Location/getFile/WEB-INF/文件夹/conf        if (confHome == null) {        confHome = (new InitWebPath()).getRootPath() + "WEB-INF" + File.separator + "conf";        }        //是否是文件夹   try {   File dirFile = new File(confHome);   if(!dirFile.exists() || (!dirFile.isDirectory())){    logger.warn("Can not find home or is not directory!\n{}", confHome);   loadingSuccess = false;   return;   }   //获取所有文件后缀是.properties的文件名   File[] files = dirFile.listFiles(new FileFilter() {   @Override   public boolean accept(File file) {   String fileName = file.getName();   int pos = fileName.lastIndexOf(".properties");//最后一个匹配的 db.xml和db.xml.xml      if (pos != -1) {     confFiles.put(fileName.substring(0, pos), file);//文件名与文件关联 key value    return true;   } else {   pos = fileName.lastIndexOf(".xml");   confFiles.put(fileName.substring(0, pos), file);   return false;   }   }   }   );   //迭代文件，读取key value   for(File file : files) {   Properties fileProperties = new Properties();   fileProperties.load(new FileReader(file));   Iterator<Entry<Object, Object>> iterProp = fileProperties.entrySet().iterator();   while(iterProp.hasNext()) {   Entry<Object, Object> row = iterProp.next();   Object key = row.getKey();   Object value = row.getValue();   if (null!=key && null!=value) {   confProperties.put(key.toString(), value.toString());   }   }   }   } catch(Exception e) {   loadingSuccess = false;   }}}/** * 读取配置文件信息 * @param name key * @return value */public static String getProperty(String name) {if (confProperties.isEmpty()) {loadProperties();}return confProperties.get(name);}static class InitWebPath{public String getRootPath() {String url = InitWebPath.class.getProtectionDomain().getCodeSource().getLocation().getFile();String filePath = "";try {filePath = java.net.URLDecoder.decode(url, "utf-8");} catch (Exception e) {logger.error(e.getMessage(), e);}final String fileFlag = "file:";if (filePath.startsWith(fileFlag)) {filePath = filePath.substring(fileFlag.length());}final String applicationFlag = "WEB-INF";return filePath.substring(0, filePath.lastIndexOf(applicationFlag));}}}