JAVA程序从属性文件（.Properties）中取得某属性的值

一、调用属性文件属性的代码：
 String url=SmsProperties.get("sms_address_frontend");//取地址如“sms_address_frontend=http://172.16.1.9:8280/sms_frontend/services/smsSenderWebService”
 String smsServer = SmsProperties.get("sms_server_name");//发送短信的服务账号(这里可以取中文属性值，在下面转码)
    String ss="";
 try {
  ss = new String(smsServer.getBytes("ISO8859_1"),"utf-8");
 } catch (UnsupportedEncodingException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 }//
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二、SmsProperties.java文件代码为
package com.skylink.common.config;
/**
 * WINTV-BOSS相关配置
 */
import java.io.DataOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.util.Properties;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class SmsProperties {
    private static Log log = LogFactory.getLog( SmsProperties.class );
    private static String FILE_NAME = "/sms_config.properties"; //文件名
    private static final Properties conf_PROPERTIES;
  static
  {
    conf_PROPERTIES = new Properties();
    InputStream stream = SmsProperties.class.getResourceAsStream(FILE_NAME);
    if ( stream == null ) {
      log.warn( FILE_NAME + " not found" );
    }
    else {
      try {
        conf_PROPERTIES.load( stream );
        log.info( "loaded properties from resource " + FILE_NAME + ": " + conf_PROPERTIES );
  &nb