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Spring中的PropertyEditor的简单实用方法

2012-08-06 23:09 218 查看
用于属性的转换，是BeanPostProcessor的一种,比如有如下两个java类：
01
package
com.google.spring.applicationContext;
02
03
public
class
Computer
04
{
05
private
 
String name;
06
 
07
public
 
Computer()
08
{
09
 
10
}
11
 
12
public
 
Computer(String name)
13
{
14
this
.name = name;
15
}
16
17
public
 
String getName()
18
{
19
return
 
name;
20
}
21
22
public
 
void
 
setName(String name)
23
{
24
this
.name = name;
25
}
26
 
27
}
01
package
 
com.google.spring.applicationContext;
02
03
public
 
class
 
Person
04
{
05
private
 
Computer computer ;
06
07
public
 
Computer getComputer()
08
{
09
return
 
computer;
10
}
11
12
public
 
void
 
setComputer(Computer computer)
13
{
14
this
.computer = computer;
15
}
16
 
17
 
18
}
假若在XML中进行如下配置：
1
<
bean
 
id
=
"person"
 
class
=
"com.google.spring.applicationContext.Person"
>
2
<
property
 
name
=
"computer"
>
3
<
value
>lenovo</
value
>
4
</
property
>
5
</
bean
>
这时候在getBean("person")的时候是有问题的。通过PropertyEditor 可以将字符串映射为其它类型：
01
package
 
com.google.spring.applicationContext;
02
03
import
 
java.beans.PropertyEditorSupport;
04
05
public
 
class
 
ComputerTypeEditor
extends
 
PropertyEditorSupport
06
{
07
private
 
String format;
08
09
public
 
String getFormat()
10
{
11
return
 
format;
12
}
13
14
public
 
void
 
setFormat(String format)
15
{
16
this
.format = format;
17
}
18
 
19
public
 
void
 
setAsText(String text)
20
{
21
Computer computer =
new
 
Computer(text);
22
this
.setValue(computer);
23
}
24
}
在XML中注册一下该转换器：
view sourceprint?
01
<
bean
 
id
=
"customEditorConfigure"
class
=
"org.springframework.beans.factory.config.CustomEditorConfigurer"
>
02
 
<
property
 
name
=
"customEditors"
>
03
 
<
map
>
04
<
entry
 
key
=
"com.google.spring.applicationContext.Computer"
>
05
<
bean
class
=
"com.google.spring.applicationContext.ComputerTypeEditor"
>
06
<
property
 
name
=
"format"
>
07
<
value
>upperCase</
value
>
08
</
property
>
09
</
bean
>
10
</
entry
>
11
 
</
map
>
12
 
</
property
>
13
</
bean
>
这时候便可正确的注入了：
1
Person person = (Person)applicationContext.getBean(
"person"
);

                                            

                                        

                        
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