Spring中的PropertyEditor的简单实用方法

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： 

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print ?

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	<beanclass="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");