Use @Qualifier comments and @Autowired comments by specifying which real bean will be assembled to eliminate clutter

1. When you create multiple beans of the same type and want to assemble only one of them, in this case, you can use @Qualifier annotations and @Autowired annotations to configure them precisely.

2. Example

Java

 Public classStudent {PrivateInteger age; PrivateString name;  Public voidsetage (Integer age) { This. Age =Age ; }       PublicInteger getage () {returnAge ; }    Public voidsetName (String name) { This. Name =name; }      PublicString GetName () {returnname; }}

 public  class   profile {@Autowired @Qualifier ( "student1" ) private   Student Student;  public   profile () {System.out.println ( /span> "Inside profile constructor."   );  public  void   Printage () {System.out.println ( Age: "+ Student.getage ());  public  void   Printname () {System.out.println ( "Name:" + Student.getname ()); }}

 Public class Mainapp {   publicstaticvoid  main (string[] args) {      new Classpathxmlapplicationcontext ("Beans.xml");       = (profile) Context.getbean ("Profile");      Profile.printage ();      Profile.printname ();   }}

Beans.xml

<?XML version= "1.0" encoding= "UTF-8"?><Beans>   <Context:annotation-config/>
   <BeanID= "Profile"class= "Com.tutorialspoint.Profile"></Bean>
   <BeanID= "Student1"class= "Com.tutorialspoint.Student">      < Propertyname= "Name"value= "Zara" />      < Propertyname= "Age"value= "One"/>   </Bean>

   <BeanID= "Student2"class= "Com.tutorialspoint.Student">      < Propertyname= "Name"value= "Nuha" />      < Propertyname= "Age"value= "2"/>   </Bean>
</Beans>

Print output

Inside profile constructor. Age:11name:zara

　　

Use @Qualifier comments and @Autowired comments by specifying which real bean will be assembled to eliminate clutter