Java.util.properties API链接：
https://docs.oracle.com/javase/8/docs/api/java/util/Properties.html
Class Properties
- java.lang.Object
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- java.util.Dictionary<K,V>
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- java.util.Hashtable<Object,Object>
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- java.util.Properties
| Constructor and Description |
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Properties()
Creates an empty property list with no default values.
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Properties(Properties defaults)
Creates an empty property list with the specified defaults.
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void |
load(InputStream inStream)
Reads a property list (key and element pairs) from the input byte stream.
从输入字节流中读取属性列表（键和元素对）。
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void |
load(Reader reader)
Reads a property list (key and element pairs) from the input character stream in a simple line-oriented format.
使用简单的行定向格式从输入字符流中读取属性列表（键和元素对）。
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