原问题为：
Is there any difference between using the @PostConstruct annotation and declaring the same method as init-method in Spring XML configuration?
原网址
节选最简单的答案：
@postconstruct is not part of the spring. It is part of javax package. Both are the same. using init-method we need to added in xml file.If you use @postconstruct adding in xml is not required. Check out the below article .
@postconstruct注解的使用 Demo