CODEWITHSUNDEEP
javaspring
Ashu
Ashu

Reputation: 1733

Initalization of Variable in Spring XML vs Java class

If we inject a variable value through spring and also initialize that in the class itself then what will be picked and why? E.g.

public class Test {
     String message;

     public String getMessage() {
      return message;
     }

     public void setMessage(String message) {
      this.message = message;
     }
 }

Springcontext.xml

  <bean id="test" class="com.testpac.Test" 
      <property name="message" value="i am message text" />
  </bean>

Upvotes: 0

Views: 516

Answers (1)

Lee Meador
Lee Meador

Reputation: 12985

Spring calls the constructor first and then calls the setter methods on the instance constructed.

If you mean you would set the value in the initialization where the variable is declared or in the constructor, the Spring set value will take precedence.

If you mean you call the setter after getting the bean from Spring, that will overwrite whatever Spring set it to.

The former is code like this:

public class Test {
     String message = "Initialized value in code";

     public String getMessage() {
      return message;
     }

     public void setMessage(String message) {
      this.message = message;
     }
 }

And the value will be what Spring sets it to. "i am message text" in your example.

In the latter case, it looks like this:

Test bean = (Test) appCtx.getBean("test");
bean.setMessage("message set in loaded bean");

And then the value is "message set in loaded bean", instead.

Upvotes: 3

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