ã·ã¹ãã ã«ãã£ã¦å ¨ãã¼ãã«ã«å ±éããã«ã©ã ãåå¨ãããã¨ãããã¨æãã¾ãã (楽観ããã¯ç¨ã®ãã¼ã¸ã§ãã³ã°ã«ã©ã ãç»é²æ¥ãæ´æ°æ¥ãç»é²è åãæ´æ°è åãªã©) JPAã®Entityã¯ã©ã¹ãä½æããã¨ãã«å ¨Entityã«åãå¤æ°ãä½ãã®ã¯ã¤ã¤ã ã£ãã®ã§ãä¸ä½ã¯ã©ã¹ãä½ã£ã¦ã¾ã¨ããããªãããªãã¨æã£ã¦èª¿ã¹ã¦ã¿ãããã®æ¹æ³ãããã¾ããã ä¸ä½ã¯ã©ã¹ã«@Entityã§ã¯ãªã@MappedSuperclassã¢ããã¼ã·ã§ã³ãã¤ããã ãã§ãã ããã ãã§ãä¸ä½ã¯ã©ã¹ãç¶æ¿ããEntityã¯ã©ã¹ã§å ±éã«ã©ã ã使ç¨ãããã¨ãã§ãã¾ããã package jp.co.test.entity; import java.io.Serializable; import java.util.Date; import javax.persistence.Column; import javax.persistence.M
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