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java-util-Properties.java
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java-util-Properties.java
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-------------------------
java
.
util
.
Properties
|
-------------------------
#
是hashtable的子类
。
#
也就是说它具备map集合的特点
。
而且它里面存储的键值对都是字符串
。
#
是集合中与IO技术相结合的集合容器
。
#
该对象的特点
:
可以用于键值对形式的配置文件
。
#
那么在加载数据时
。
要有固定格式
键
=
值
#
把info文件的键值数据存到集合中的操作
1
,
用一个流和info文件关联
2
,
读取一行数据
,
讲该行数据用
"="
进行切割
3
,"="
左边作为键
,
右边作为值
。
存储到
Properties
集合中
。
-------------------------
实例方法
/
字段
|
-------------------------
Properties
p
=
new
Properties
();
p
.
getProperty
(
String
key
);
|--
根据指定的键
,
获取对应的值
。
p
.
load
(
输入流
);
|--
从一个输入流
(
配置文件的流
)
中获取键值对
(
加载进
Properties
)。
p
.
store
(
输出流
,
注释信息
)
|--
把内存中
Properties
的键值对
。
写进输出流
。
可以加上后面的注释信息
。
p
.
store
(
输出流
,
"注释信息"
);
|--
把配置写进输出流
(
配置文件的流
)。
后面可以添加字符串类型的注释
。
p
.
getProperty
(
key
)
|--
根据指定的键获取对应的值
(
String
)。
p
.
list
(
输出打印流
)
|--
将属性列表输出到指定的输出流
。
p
.
setProperty
(
键
,
值
);
|--
根据指定的键位
,
修改指定的值
。
如果键不存在
。
就新建
。
p
.
stringPropertyNames
();
|--
返回此列表中的键集
(
不包含值
)。
返回的是
Set
<
String
>
类型的集合
。
You can’t perform that action at this time.