package com.hibernate.annotation; import org.hibernate.HibernateException; import org.hibernate.tuple.AnnotationValueGeneration; import org.hibernate.tuple.ValueGenerator; import java.lang.annotation.Annotation; import java.sql.Time; import java.sql.Timestamp; import java.time.LocalDate; import java.time.LocalDateTime; import java.time.LocalTime; import java.util.Calendar; import java.util.Date; /**  * Created with IntelliJ IDEA.  * User: ZhongGang  * Date: 14-4-16  * Time: 上午11:40  * <p/>  * 支持Java8新的时间包  *  * @see java.time.LocalDateTime  * @see java.time.LocalDate  * @see java.time.LocalTime  */ public abstract class AbstractTimeGeneration<A extends Annotation> implements AnnotationValueGeneration<A> {     protected ValueGenerator<?> generator;     @Override     public void initialize(A annotation, Class<?> propertyType) {         if (LocalDateTime.class.isAssignableFrom(propertyType)) {             generator = (session, owner) -> LocalDateTime.now();         } else if (LocalDate.class.isAssignableFrom(propertyType)) {             generator = (session, owner) -> LocalDate.now();         } else if (LocalTime.class.isAssignableFrom(propertyType)) {             generator = (session, owner) -> LocalTime.now();         } else if (java.sql.Date.class.isAssignableFrom(propertyType)) {             generator = (session, owner) -> new java.sql.Date(new Date().getTime());         } else if (Time.class.isAssignableFrom(propertyType)) {             generator = (session, owner) -> new Time(new Date().getTime());         } else if (Timestamp.class.isAssignableFrom(propertyType)) {             generator = (session, owner) -> new Timestamp(new Date().getTime());         } else if (Date.class.isAssignableFrom(propertyType)) {             generator = (session, owner) -> new Date();         } else if (Calendar.class.isAssignableFrom(propertyType)) {             generator = (session, owner) -> {                 Calendar calendar = Calendar.getInstance();                 calendar.setTime(new Date());                 return calendar;             };         } else {             throw new HibernateException("Unsupported property type for generator annotation " + annotation.getClass().getSimpleName());         }     }     @Override     public ValueGenerator<?> getValueGenerator() {         return generator;     }     @Override     public boolean referenceColumnInSql() {         return false;     }     @Override     public String getDatabaseGeneratedReferencedColumnValue() {         return null;     } }