Spring Autowiring only works with Interface

Question

I am quite new to spring framework and came across the following issue.

I have an interface ClassA, which is implemented by classed ClassA1

Answer 1

If your objects are proxied by JDK proxies, then they should be referred to by their interface. You can make proxies by concrete class using CGLIB (on the classpath) and proxy-target-class="true" in your aop configuration (in applicationContext.xml)