这是说这个Servlet输出的是数据，应该要：
方法1：在类名上加上注解@RestController,这个注解的意思是相当于在控制层上加了@Controller和@ResponseBody,意味着当前控制层中所有方法返回的都是JSON对象
方法2：
相关文章
- 12-10[Circular view path [abc]: would dispatch back to the current handler URL
- 12-10Circular view path would dispatch back to the current handler...This may be the result of an unspeci
- 12-10javax.servlet.ServletException: Circular view path [student]: would dispatch back to the current han
- 12-10解决：javax.servlet.ServletException: Circular view path []: would dispatch back to the current....