.w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation]

當想要返回的是json數據，produces寫的"text/plain",會報錯

@RequestMapping(value = "/getDynamicByDynamicId1",produces = "text/plain")
@ResponseBody
public Dynamic getDynamicByDynamicId1(){
    System.out.println();
    return dynamicMapper.getDynamicByAnnotationFromDynamicId(1l);
}

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.

Thu Nov 21 15:01:12 CST 2019

There was an unexpected error (type=Not Acceptable, status=406).

Could not find acceptable representation

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

 

改為

@RequestMapping(value = "/getDynamicByDynamicId1",produces = "application/json")
@ResponseBody
public Dynamic getDynamicByDynamicId1(){
    System.out.println();
    return dynamicMapper.getDynamicByAnnotationFromDynamicId(1l);
}