SpringBoot找不到可接受的表示

错误

org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation

原因

@RestController
public class ExchangeApiController {

	// 返回的是json的对象
	@RequestMapping(value = "/exchange", method = RequestMethod.POST)
    public ApiResult exchange(@RequestAttribute("tradingReq") TradingReqDTO tradingReqDTO) {
        return normalExchangeService.exchange(tradingReqDTO);
    }
}

// 拦截器将response返回类型设置为了xml文件
   @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        response.setContentType("application/xml;charset=UTF-8");
}

最终导致，想要返回的是xml形式，结果返回了json格式，导致出现如上错误提示