SpringBoot异常：`Resolved [org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation]`

错误信息

org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
    at org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping.handleNoMatch(RequestMappingInfoHandlerMapping.java:216)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.lookupHandlerMethod(AbstractHandlerMethodMapping.java:376)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:316)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:62)
    at org.springframework.web.servlet.handler.AbstractHandlerMapping.getHandler(AbstractHandlerMapping.java:350)
    at org.springframework.web.servlet.DispatcherServlet.getHandler(DispatcherServlet.java:1188)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:964)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
......

解决方案

有人说是方法名和静态资源重合了

其他博客的解释：
当用户请求 /login.html 时，spring会查找/login对应的控制器，并得到其返回的文档类型为application/json, 然后判断它与后缀名.html文档类型是否匹配，如果不匹配，就报HttpMediaTypeNotAcceptableException了。
其实它的初衷是好的，它是想实现访问/user.json时返回JSON数据，访问/user.html返回HTML, 访问/user.xml则返回XML的功能。但是在这里我们只用Spring Boot提供RESTful接口，因此该功能就无用武之地了