Java Learning Data-java Optimal single case model

import java.io.ioexception;import java.io.inputstream;import java.util.properties;import  org.apache.log4j.logger;/** * propertiesutil *  *  @author  yangshenhui  */public class propertiesutil { private static logger logger =  Logger.getlogger (Propertiesutil.class);  private propertiesutil ()  { } private  Static class singletonholder {  private final static propertiesutil  instance = new propertiesutil (); } public static propertiesutil  getinstance ()  {  return SingletonHolder.INSTANCE; } public Properties  GetProperties (String filename)  {  Properties Properties = new  Properties ();  inputstream inputstream = null;  try {    inputstream = prOpertiesUtil.class.getClassLoader ()      .getresourceasstream (fileName);    properties.load (InputStream);  } catch  (ioexception e)  {    Logger.error (E.getmessage (),  e);  } finally {   if  (inputStream  != null)  {    try {     inputstream.close ();     } catch  (ioexception e)  {      Logger.error (E.getmessage (),  e);    }   }  }   return properties; }}

Java Learning Data-java Optimal single case model