hibernate(jpa)复合主键annotation声明方法

CREATE TABLE TB_HOUR_DATA
(
　 STAT_DATE　 DATE　　　　　　　　　　　　　　　　　　 NOT NULL,
　 PATH_ID　　　 NUMBER(20)　　　　　　　　　　　　 NOT NULL,
　 VALUE　　　　　 VARCHAR2(512 BYTE),
　 TYPE　　　　　　 NUMBER(1)　　　　　　　　　　　　　 NOT NULL
)

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;
}
}

    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;
}
}