程序员的量化交易之路（17）--Cointrader之Temporal实体（5）

来源：互联网发布：java之父宣布java 编辑：程序博客网时间：2024/04/28 13:46

转载需要注明：http://blog.csdn.net/minimicall，http://cloudtrader.top/

这一小节说明一个时间实体Temporal实体，它的代码很简单。

package org.cryptocoinpartners.schema;import java.util.Date;import javax.persistence.Basic;import javax.persistence.MappedSuperclass;import javax.persistence.Transient;import org.hibernate.annotations.Type;import org.joda.time.Instant;/** * @author Tim Olson */

//这个标注说明这个类也是一个基类，不会在数据库中创建表@MappedSuperclasspublic class Temporal extends EntityBase {    public Temporal(Instant time) {        super();        this.time = time;        this.dateTime = time.toDate();        this.timestamp = time.getMillis();    }    /** For Events, this is the time the Event itself occured, not the time we received the Event.  It should be remote     * server time if available, and local time if the object was created locally */

/@/Type注解用于说明类型    @Type(type = "org.jadira.usertype.dateandtime.joda.PersistentInstantAsMillisLong")    @Basic(optional = false)    public Instant getTime() {        return time;    }//这个注解用于说明该字段不会存储到数据库中    @Transient    public Date getDateTime() {        return dateTime;    }    @Transient    public long getTimestamp() {        return timestamp;    }    // JPA    protected Temporal() {    }    protected void setTime(Instant time) {        this.time = time;        this.dateTime = time.toDate();        this.timestamp = time.getMillis();    }    protected Instant time;//时间    private long timestamp;//时间截    private Date dateTime;//日期}

需要说明的是，这个类

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