java读取utf8配置文件乱码

email.properties文件如果以ISO-8859-1编码，那么以下的java代码读取中文不会乱码，因为eclipse下中文都被翻译成/u...

//in Conf.java
Properties p = new Properties();
InputStream is = Conf.class.getClassLoader().getResourceAsStream(
                "email.properties");
String subject = p.getProperty("EMAIL_SUBJECT");

但是如果把email.properties设置成utf8编码，以上的代码读取的就是乱码了。需要做如下变动

//in Conf.java

Properties p = new Properties();
InputStream is = Conf.class.getClassLoader().getResourceAsStream(
                "email.properties");
String subject = p.getProperty("EMAIL_SUBJECT");

new String(subject.getBytes("ISO-8859-1"),"UTF-8");