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Properties p = new Properties();
p.load(in);
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3¡£Ê¹ÓÃjava.util.PropertyResourceBundleÀàµÄ¹¹Ô캯Êý
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4¡£Ê¹ÓÃclass±äÁ¿µÄgetResourceAsStream()·½·¨
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Properties p = new Properties();
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