How do I inject a single property value into a string using spring 2.5.x?
I would really like to annotate a method with a reference to a single property in a property file for injection.
@Resource("${my.service.url}")
private String myServiceUrl;
Of course, this syntax does not work ;) Thats why I'm asking here.
I am aware that I can inject the full properties file, but that just seems excessive, I dont want the property file - I want the configured value.
Edit: I can only see PropertyPlaceholderConfigurer examples where XML is used to wire the property to the given field. I still cannot figure out how this can be achieved with an annotation ?
Asked by: John354 | Posted: 28-01-2022
Answer 1
I know it has been a while since the original post but I have managed to stumble across a solution to this for spring 2.5.x
You can create instances of "String" beans in the spring xml configuration which can then be injected into the Annotated components
@Component
public class SomeCompent{
@Autowired(required=true
@Resource("someStringBeanId")
private String aProperty;
...
}
<beans ....>
<context:component-scan base-package="..."/>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
...
</bean>
<bean id="someStringId" class="java.lang.String" factory-method="valueOf">
<constructor-arg value="${place-holder}"/>
</bean>
</beans>
Answer 2
I've created a project which addresses this problem for Spring 2.5.*:
http://code.google.com/p/spring-property-annotations/
For Spring 3 you can use the @Value("${propery.key}") annotation.
Answered by: Miller770 | Posted: 01-03-2022Answer 3
There's a thread about this on the Spring forum. The short answer is that there's really no way to inject a single property using annotations.
I've heard that the support for using annotations will be improved in Spring 3.0, so it's likely this will be addressed soon.
Answered by: David685 | Posted: 01-03-2022Answer 4
you can do this if you use XML configuration. Just configure PropertyPlaceholderConfigurer and specify property value in configuration
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath:com/foo/jdbc.properties</value>
</property>
</bean>
<bean ...>
<property name="myServiceUrl" value="${my.service.url}"/>
</bean>
Answer 5
You could try injecting value of property "my.service.url" to a filed in your bean.
Take a look at: http://static.springframework.org/spring/docs/2.5.x/reference/beans.html#beans-factory-placeholderconfigurer
HTH.
Answered by: William103 | Posted: 01-03-2022Similar questions
java - How to inject String property in a spring bean
We inject simple property with configuration as shown below :
<bean id="myService" class="com.aaa.bbb.ccc.MyServiceImpl">
<property name="myProp" value=""/>
</bean>
How would you do it with annotations?
java - How to inject only one property into class
I have a class
class A{
private Foo foo;
private Bar bar;
private Baz baz;
}
Now this class has constructor that initializes foo and bar. Baz however has an DataSource field which I want o be injected with spring.
The A class constructor initializes all but NOT baz. Now the A class in initialized with ne...
java - How to inject property values into enum?
I'm using Spring to resolve property values from properties file, usually with @Value("${my.property}").
Now I have an enum that should have an application-wide configurable static number. For example:
public enum PersonType {
ADULT, CHILD;
private static final int MAX_CHILD = 17;
public static PersonType fromAge(int age) {
return age <= MAX_CHILD ?...
java - How to inject property value using @Value into static fields
I have one property file config.properties which is configured using spring property placeholder. This is how it's configured in my spring configuration file:
<context:property-placeholder location="classpath:properties/config.properties"/>
Now I need to set its value to static field using @Value annotation.
@Value("${outputfilepath}")
private static ...
java - inject Property from jndi
My app uses spring, runs on tomcat
I have class
public class Entity{
private String field;
private Properties properties;
...geters/setters...
}
and context.xml
<?xml version='1.0' encoding='utf-8'?>
<Context>
<Environment name="field.name" value="value" type="java.lang.String" override="false" />
</Context>
and...
java - Xml - Inject result of method in a bean property
I'm using Apache Camel and i have a bean tag in the blueprint.xml file as shown below:
<bean id="shiroPolicy" class="org.apache.camel.component.shiro.security.ShiroSecurityPolicy">
<argument value="shiro.ini"/>
<property name="permissionsList" >
<list>
.......
</list>
</property>
</bea...
java - Inject String Value from property file into a set
I have a string in my property file
set.test=FIRST,SECOND,THIRD,THIRD
I want to inject this into a set using @Value
@Value(value = "${set.test}")
private Set<String> testSet;
Is there a way for spring to split it based on comma and load it into the set automatically or should I assign it to an array and convert it to Set?
java - How to inject a property value into a filter?
My question is simple. I'm trying to inject a property value into a filter. In my controller class, I used the following code and I could inject the property successfully:
@Controller
public class StatementController {
@Value("${xapi.version}")
private String version;
...
}
but when I use the same code in a custom filter,I get a null value in version property. This is the code:...
java - How Can I inject Entity Property Into another set of entity using JPA?
I'm working on my first API project using Java JPA.
The project is based on three tables (event, phase, evt_phases); event represent vent data and phase represent preset event stages, and evt_phases links phase with event and contain two fields called start and end; those fields are containing the start date(time) and end date(time) of the phase.
java - How can I inject property source of a bean in test
I am writing unit tests for my services in Spring, Java. I mock all dependencies in a tested class and I instantiate the tested class in a constructor, to which I pass mocked classes. The problem is that the tested class injects properties from .properties file into fields that are inside it (let's say Strings).
I use the standard combination of @PropertySource on a class level and @Value ...
What is the data type for length property for Java arrays?
I want to find out if length property for Java arrays is an int/long or something else.
java - JSP bean tag for property that might not exist
In JSP I can reference a bean's property by using the tag
${object.property}
Is there some way to deal with properties that might not exist? I have a JSP page that needs to deal with different types. Example:
public class Person {
public String getName()
}
public class Employee extends Person {
public float getSalary()
}
In JSP I want to display a table of people with colum...
"Holds value of property" in Java code
I got some legacy code with that caption spread out as comment almost in every field. Also appearing is "Setter for property xyz".
Just out of curiosity, which Java tool generated this stubs?
java - read property value in Ant
I need to read the value of a property from a file in an Ant script and strip off the first few characters. The property in question is
path=file:C:/tmp/templates
This property is store in a file that I can access within the ant script via
<property file="${web.inf.dir}/config.properties"/>
I have two questions:
How do I read the single...
java - How to assign bean's property an Enum value in Spring config file?
I have a standalone enum type defined, something like this:
package my.pkg.types;
public enum MyEnumType {
TYPE1,
TYPE2
}
Now, I want to inject a value of that type into a bean property:
<bean name="someName" class="my.pkg.classes">
<property name="type" value="my.pkg.types.MyEnumType.TYPE1" />
</bean>
Absence of property syntax in Java
C# has syntax for declaring and using properties. For example, one can declare a simple property, like this:
public int Size { get; set; }
One can also put a bit of logic into the property, like this:
public string SizeHex
{
get
{
return String.Format("{0:X}", Size);
}
set
{
Size = int.Parse(value, NumberStyles.HexNumber);
}
}
...
java - A better class to update property files?
Though java.util.properties allows reading and writing properties file, the writing does not preserve the formatting. Not surprising, because it is not tied to the property file.
Is there a PropertyFile class out there -- or some such -- that preserves comments and blank lines and updates property values in place?
java - In Eclipse RCP, how do I disable a save toolbar button according to the "dirty" property in editor
In my eclipse RCP 3.3 application, I would like to enable or disable a 'save' toolbar button according to current editor dirty flag.
I'm trying to use the <
java - Enforce service layer business rules on entity property changes, or hide entity property from clients but not service?
Let's say I have a class Customer, which has a property customerType.
I have another class called something like SpecialContract, which has a Customer and some other properties.
If customer.customerType == SPECIAL, then there is a SpecialContract which has a reference to this particular Customer.
Now I realize that this is a bit hoaky, but I do not want to maintain a relationship from Customer
java - Replace the property value using RegEx
I have config.properties file containing properties in Java Properties format.
I need to replace the value of a property with a known name with a new value. The comments and formatting of the file should be preserved.
My current approach is to use RegEx to match the property name and then replace its value. However, Java Properties supports multi-line values, which I have hard time matching.
Here is an exam...
Still can't find your answer? Check out these amazing Java communities for help...
Java Reddit Community | Java Help Reddit Community | Dev.to Java Community | Java Discord | Java Programmers (Facebook) | Java developers (Facebook)