Spring Framework is used to wire objects across an application in different layers. In spite of its ever-looming presence, Spring Framework did not restrict the flexibility or choice of frameworks that application architects and developers had. A couple of examples are listed as follows:

• Spring Framework provided great flexibility in the web layer. If you wanted to use Struts or Struts 2 instead of Spring MVC, it was configurable. You had the choice of integrating with a wider range of view and template frameworks.
• Another good example is the data layer, where you had possibilities to connect with JPA, JDBC, and mapping frameworks, such as MyBatis.