为了给代码中的两个参数赋值，使用了如下的两种方式，请问有何区别，实现InitializingBean接口这种方式的优势在哪？

@Component
public class TestService implements InitializingBean {

    private String param1 = null;
    private String param2 = null;

    {
        param2 = "world";
        System.out.println("赋值param2,param2=" + param2);
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        param1 = "hello";
        System.out.println("赋值param1,param1=" + param1);
    }

}