[Java] JPA中EntityListeners注解的使用详解

/**
 * 数据建立与更新.
 */
public interface dataentity {
 
 timestamp getdatecreated();
 
 void setdatecreated(timestamp datecreated);
 
 timestamp getlastupdated();
 
 void setlastupdated(timestamp lastupdated);
 
 long getdatecreatedon();
 
 void setdatecreatedon(long datecreatedon);
 
 long getlastupdatedon();
 
 void setlastupdatedon(long lastupdatedon);
 
}

@slf4j
@component
@transactional
public class dataentitylistener {
 @prepersist
 public void prepersist(dataentity object)
   throws illegalargumentexception, illegalaccessexception {
  timestamp now = timestamp.from(instant.now());
  object.setdatecreated(now);
  object.setlastupdated(now);
  logger.debug("save之前的操作");
 }
 
 @postpersist
 public void postpersist(dataentity object)
   throws illegalargumentexception, illegalaccessexception {
 
  logger.debug("save之后的操作");
 }
 
 @preupdate
 public void preupdate(dataentity object)
   throws illegalargumentexception, illegalaccessexception {
  timestamp now = timestamp.from(instant.now());
  object.setlastupdated(now);
  logger.debug("update之前的操作");
 }
 
 @postupdate
 public void postupdate(dataentity object)
   throws illegalargumentexception, illegalaccessexception {
  logger.debug("update之后的操作");
 }
 
 @preremove
 public void preremove(dataentity object) {
  logger.debug("del之前的操作");
 
 }
 
 @postremove
 public void postremove(dataentity object) {
  logger.debug("del之后的操作");
 
 }
}

@entitylisteners(dataentitylistener.class)
public class product implements dataentity {
   @override
 public timestamp getdatecreated() {
  return createtime;
 }
 
 @override
 public void setdatecreated(timestamp datecreated) {
  createtime = datecreated;
 }
 
 @override
 public timestamp getlastupdated() {
  return lastupdatetime;
 }
 
 @override
 public void setlastupdated(timestamp lastupdated) {
  this.lastupdatetime = lastupdated;
 }
 
 @override
 public long getdatecreatedon() {
  return createon;
 }
 
 @override
 public void setdatecreatedon(long datecreatedon) {
  createon = datecreatedon;
 }
 
 @override
 public long getlastupdatedon() {
  return lastupdateon;
 }
 
 @override
 public void setlastupdatedon(long lastupdatedon) {
  this.lastupdateon = lastupdatedon;
 }
}