Embarrassment: There are two modelandview classes in Java

First:

Spring MVC Framework, the request of a JSP page, always error, this question, is this Monday or Tuesday, the problem encountered, then was not found the reason, tried various methods, such as: The controller class copied to another package, and carefully compared to register to prevent registration mistakes , the method of Modelandview instance object is written again, in order to avoid encountering the unknown bug that is changed well ...

Previous Code Map:

When I just wrote the code, I saw two prompts on the Modelandview class for import information .... The correct complete classpath should be: org.springframework.web.servlet.ModelAndView

Embarrassment: There are two modelandview classes in Java