溫馨提示×
您好，登錄后才能下訂單哦！
點擊 登錄注冊 即表示同意《億速云用戶服務條款》
您好，登錄后才能下訂單哦！
hibernate中怎么聲明復合主鍵，很多新手對此不是很清楚，為了幫助大家解決這個難題，下面小編將為大家詳細講解，有這方面需求的人可以來學習下，希望你能有所收獲。
1、復合主鍵類HourDataPK
package net.kong.wolf.stat.db.entity; import java.io.Serializable; import java.util.Date; import javax.persistence.Column; import javax.persistence.Embeddable; import javax.persistence.JoinColumn; import javax.persistence.ManyToOne; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Embeddable
public class HourDataPK implements Serializable {/** *//** * */ private static final long serialVersionUID = 1L; @ManyToOne @JoinColumn(name = "path_id", nullable = false) private Path path; @Column(name = "stat_date") @Temporal(TemporalType.DATE) private Date statDate; private int type; public Path getPath() {
return path;
}public void setPath(Path path) {
this.path = path;
}public Date getStatDate() {
return statDate;
}public void setStatDate(Date statDate) {
this.statDate = statDate;
}public int getType() {
return type;
}public void setType(int type) {
this.type = type;
}
} |
2、實體類HourData：
package net.kong.wolf.stat.db.entity; import java.io.Serializable; import javax.persistence.EmbeddedId; import javax.persistence.Entity; import javax.persistence.Table; import net.kong.wolf.stat.core.Text; @Entity
@Table(name = "TB_HOUR_DATA")
public class HourData implements Serializable {/** *//** * */ private static final long serialVersionUID = 1L; @EmbeddedId private HourDataPK pk; private String value; public String getValue() {
return value;
}public void setValue(String value) {
this.value = value;
}public int[] getHours() {
return parseValue(value);
}private int[] parseValue(String value) {
int[] result = new int[24];
for (int i = 0; i < 24; i++) {
result[i] = -1;
}
if (value == null) {
return result;
}
String[] hs = Text.splitCSV(value);
int len = Math.min(24, hs.length);
for (int i = 0; i < len; i++) {
result[i] = Text.parseInt(hs[i], -1);
}
return result;
}public void setHours(int[] hours) {
int[] tHours = parseValue(value);
StringBuilder sb = new StringBuilder();
int len = Math.min(24, hours.length);
for (int i = 0; i < len; i++) {
sb.append(hours[i] < 0 ? tHours[i] : hours[i]).append(',');
}
sb.deleteCharAt(sb.length() - 1);
this.value = sb.toString();
}public HourDataPK getPk() {
return pk;
}public void setPk(HourDataPK pk) {
this.pk = pk;
}
} |
看完上述內容是否對您有幫助呢？如果還想對相關知識有進一步的了解或閱讀更多相關文章，請關注億速云行業資訊頻道，感謝您對億速云的支持。
免責聲明：本站發布的內容（圖片、視頻和文字）以原創、轉載和分享為主，文章觀點不代表本網站立場，如果涉及侵權請聯系站長郵箱：is@yisu.com進行舉報，并提供相關證據，一經查實，將立刻刪除涉嫌侵權內容。
