程式員的量化交易之路（17）--Cointrader之Temporal實體（5），程式員的量化交易之路

程式員的量化交易之路（17）--Cointrader之Temporal實體（5），程式員的量化交易之路

轉載需要註明：http://blog.csdn.net/minimicall，http://cloudtrader.top/

這一小節說明一個時間實體Temporal實體，它的代碼很簡單。

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 */

//這個標註說明這個類也是一個基類，不會在資料庫中建立表@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註解用於說明類型    @Type(type = "org.jadira.usertype.dateandtime.joda.PersistentInstantAsMillisLong")    @Basic(optional = false)    public Instant getTime() {        return time;    }//這個註解用於說明該欄位不會儲存到資料庫中    @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;//時間    private long timestamp;//時間截    private Date dateTime;//日期}

需要說明的是，這個類