1 回答post頁面報錯 ids for this class must be manually assigned before calling save()

4 回答 Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2018-11-18 18:51:36.804 ERROR 10728 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframe

2 回答org.springframework.http.converter.HttpMessageNotWritableException: No converter found for return value of type: class java.util.HashMap

4 回答Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.

1 回答mapping里面的增刪改查