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2019-12-20 21:07:05.962 WARN 7776 --- [nio-8087-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver :
Failed to write HTTP message: org.springframework.http.converter.HttpMessageNotWritableException: No converter found for return value of type: class com.project.domian.User
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在练习 怎么实现 java间的调用,一样的流程,为什么有一个会报错?