spring inject templated class object - spring

Question

#Component
public class A<K, V> {
#Autowired
// spring unable to inject this, #Qualifier can not use here
private B<K, V> b;
}
public class B<K, V>{}
#Configuration
public class ConifgA {
#Bean
#Qualifier("int_a")
public A<Integer, Integer> getA1() { return new A<>(); }
#Bean
#Qualifier("int_a")
public A<String, String> getA2() { return new A<>(); }
}
#Configuration
public class ConifgB {
#Bean
public B<Integer, Integer> getB1() { return new B<>(); }
#Bean
public B<String, String> getB2() { return new B<>(); }
}
#Component
class C {
#Autowired
#Qualifier("int_a")
A<Integer, Integer> ia;
#Autowired
#Qualifier("str_a")
A<String, String> sa;
}
I can not manually new B() and pass it to A's ctor because B contains data members which was injected by spring

Answer 1

#Qualifier is typically used paired with #Autowired to specify a single bean candidate by name when there are several bean instances with shared interface in the context. If you wish to inject a desired bean name, just setting the default value in #Bean works.
I've written a test class that works for your scenario:
#RunWith(SpringRunner.class)
#ContextConfiguration(classes = FooTest.TestConfig.class)
public class FooTest {
#Autowired
private C c;
#Test
public void testCisAvailable(){
Assert.assertNotNull(c);
}
#Configuration
static class TestConfig {
#Bean("int_a")
public A<Integer, Integer> getA1(B<Integer, Integer> b) {
return new A<>(b);
}
#Bean("str_a")
public A<String, String> getA2(B<String, String> b) {
return new A<>(b);
}
#Bean
public B<Integer, Integer> getB1() {
return new B<>();
}
#Bean
public B<String, String> getB2() {
return new B<>();
}
#Bean
public C getC(A<Integer, Integer> ia,
A<String, String> sa) {
return new C(ia, sa);
}
}
static class B<K, V> {
}
static class A<K, V> {
private final B<K, V> b;
#Autowired
public A(B<K, V> b) {
this.b = b;
}
}
static class C {
private final A<Integer, Integer> ia;
private final A<String, String> sa;
#Autowired
public C(#Qualifier("int_a") A<Integer, Integer> ia,
#Qualifier("str_a") A<String, String> sa) {
this.ia = ia;
this.sa = sa;
}
}
}