In Spring, there are three ways to inject value into bean properties.
- Normal way
- Shortcut
- “p” schema
See a simple Java class, which contains two properties – name and type. Later you will use Spring to inject value into the bean properties.
package com.mkyong.common;
public class FileNameGenerator
{
private String name;
private String type;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
}
1. Normal way
Inject value within a ‘value’ tag and enclosed with ‘property’ tag.
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean id="FileNameGenerator" class="com.mkyong.common.FileNameGenerator">
<property name="name">
<value>mkyong</value>
</property>
<property name="type">
<value>txt</value>
</property>
</bean>
</beans>
2. Shortcut
Inject value with “value” attribute.
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean id="FileNameGenerator" class="com.mkyong.common.FileNameGenerator">
<property name="name" value="mkyong" />
<property name="type" value="txt" />
</bean>
</beans>
3. “p” schema
Inject value by using “p” schema as an attributes.
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean id="FileNameGenerator" class="com.mkyong.common.FileNameGenerator"
p:name="mkyong" p:type="txt" />
</beans>
Remember declares the xmlns:p=”http://www.springframework.org/schema/p in the Spring XML bean configuration file.
Conclusion
Which methods to use is totally base on personal preference, it will not affect the value inject into the bean properties.
I want to add <property> based on condition. How to do that? any info
Did you copy that beans xmlns tag and if u did where did you copied from or you have to write that everytime in new project
Remember to put getters and setters on your bean class.
sir tell me the use of property tag .
cool i like the third type
I think you need to take out “p” name space in the tutorial. xmlns:p=”http://www.springframework.org/schema/p” is no longer available.
And where is the Injection??? THIS IS JUST *** THAT ARE JUST SCHMEMAS!
Please read previous articles
Just superb tutorial!!! Amazine tutorial content
why does the http://www.springframework.org/schema/p url point to nothing? I want eclipse to show me the options for p when I hit control space and right now it doesn’t work. I’m guessing because http://www.springframework.org/schema/p doesn’t point to anything??
yes,point to nothing ,i just wonder why too.
@Bebiton
can be written in p name space as
Hello,
It is first time for me to read here, you are doing a great job.
Super Article
Makes life easy
One small doubt how to i set ref- properties with p schema.
Thanks
<bean id="john-classic" class="com.example.Person"> <property name="name" value="John Doe"/> <property name="spouse" ref="jane"/> </bean> <bean name="jane" class="com.example.Person"> <property name="name" value="John Doe"/> </bean> <bean id="john-classic" class="com.example.Person" p:name="John Doe" p:spouse-ref="jane"/> </bean> <bean name="jane" class="com.example.Person" p:name="John Doe"/> </bean>Thank you Balaji
We simple say WOW WOW WOW !! Man you are doing wonderful job again and again ….
We are your fan now…