习惯了把集合定义在一个类的字段中，今天遇到想重用集合的定义，竟然不知道单独的集合Bean应该怎么定义了，记之，以备后用。
对Map来说，有一种比较搓的方法，就是直接用Map的构造函数：
1
<
bean id
=
"
SymbolMap
"
class
=
"
java.util.HashMap
"
>
2
<
constructor
-
arg
>
3
<
map
>
4
<
entry
>
5
<
key
><
value
><!
[CDATA[us;djia]]
></
value
></
key
>
6
<
value
><!
[CDATA[us
&
dji]]
></
value
>
7
</
entry
>
8
</
map
>
9
</
constructor
-
arg
>
10
</
bean
>
11
<
bean id
=
"
SymbolMap
"
class
=
"
java.util.HashMap
"
>
2
<
constructor
-
arg
>
3
<
map
>
4
<
entry
>
5
<
key
><
value
><!
[CDATA[us;djia]]
></
value
></
key
>
6
<
value
><!
[CDATA[us
&
dji]]
></
value
>
7
</
entry
>
8
</
map
>
9
</
constructor
-
arg
>
10
</
bean
>
11
另一种稍微简单的方法：
1
<
bean id
=
"
emails
"
class
=
"
org.springframework.beans.factory.config.MapFactoryBean
"
>
2
<
property name
=
"
sourceMap
"
>
3
<
map
>
4
<
entry key
=
"
pechorin
"
value
=
"
pechorin@hero.org
"
/>
5
<
entry key
=
"
raskolnikov
"
value
=
"
raskolnikov@slums.org
"
/>
6
<
entry key
=
"
stavrogin
"
value
=
"
stavrogin@gov.org
"
/>
7
<
entry key
=
"
porfiry
"
value
=
"
porfiry@gov.org
"
/>
8
</
map
>
9
</
property
>
10
</
bean
>
11
<
bean id
=
"
emails
"
class
=
"
org.springframework.beans.factory.config.MapFactoryBean
"
>
2
<
property name
=
"
sourceMap
"
>
3
<
map
>
4
<
entry key
=
"
pechorin
"
value
=
"
pechorin@hero.org
"
/>
5
<
entry key
=
"
raskolnikov
"
value
=
"
raskolnikov@slums.org
"
/>
6
<
entry key
=
"
stavrogin
"
value
=
"
stavrogin@gov.org
"
/>
7
<
entry key
=
"
porfiry
"
value
=
"
porfiry@gov.org
"
/>
8
</
map
>
9
</
property
>
10
</
bean
>
11
对这种方法，Sping还提供了ListFactoryBean, SetFactoryBean等类，这貌似是Spring的一个可扩展框架，可以待以后进一步研究这个框架的实现方式。
最简单的一种方式就是直接用spring中提供的util包：
1
<
util:map id
=
"
emails
"
>
2
<
entry key
=
"
pechorin
"
value
=
"
pechorin@hero.org
"
/>
3
<
entry key
=
"
raskolnikov
"
value
=
"
raskolnikov@slums.org
"
/>
4
<
entry key
=
"
stavrogin
"
value
=
"
stavrogin@gov.org
"
/>
5
<
entry key
=
"
porfiry
"
value
=
"
porfiry@gov.org
"
/>
6
</
util:map
>
7
<
util:map id
=
"
emails
"
>
2
<
entry key
=
"
pechorin
"
value
=
"
pechorin@hero.org
"
/>
3
<
entry key
=
"
raskolnikov
"
value
=
"
raskolnikov@slums.org
"
/>
4
<
entry key
=
"
stavrogin
"
value
=
"
stavrogin@gov.org
"
/>
5
<
entry key
=
"
porfiry
"
value
=
"
porfiry@gov.org
"
/>
6
</
util:map
>
7
使用改方法时，xml文件头需要使用：
1
xmlns:util
=
"
http://www.springframework.org/schema/util
"
2 xsi:schemaLocation
=
"
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
3
http:
//
www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-2.5.xsd
">
xmlns:util
=
"
http://www.springframework.org/schema/util
"
2
xsi:schemaLocation
=
"
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
3
http:
//
www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-2.5.xsd
">
引用：
http://macrochen.iteye.com/blog/392616
http://springindepth.com/book/in-depth-ioc-collections.html
