我在使用hibernate
映射oracle时遇到了问题我得到了这些课程
Stock.java
package com.mc.stock;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
@Entity
@Table(name = "stock", uniqueConstraints = {
@UniqueConstraint(columnNames = "STOCK_NAME"),
@UniqueConstraint(columnNames = "STOCK_CODE")})
public class Stock implements java.io.Serializable {
private Integer stockId;
private String stockCode;
private String stockName;
private Set<StockDailyRecord> stockDailyRecords = new HashSet<StockDailyRecord>(
0);
public Stock() {
}
public Stock(String stockCode, String stockName) {
this.stockCode = stockCode;
this.stockName = stockName;
}
public Stock(String stockCode, String stockName,
Set<StockDailyRecord> stockDailyRecords) {
this.stockCode = stockCode;
this.stockName = stockName;
this.stockDailyRecords = stockDailyRecords;
}
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq_stock_id")
@SequenceGenerator(name = "seq_stock_id", sequenceName = "seq_stock_id", initialValue = 1, allocationSize = 1)
@Basic(optional = false)
@Column(name = "STOCK_ID", unique = true, nullable = false)
public Integer getStockId() {
return this.stockId;
}
public void setStockId(Integer stockId) {
this.stockId = stockId;
}
@Column(name = "STOCK_CODE", unique = true, nullable = false, length = 10)
public String getStockCode() {
return this.stockCode;
}
public void setStockCode(String stockCode) {
this.stockCode = stockCode;
}
@Column(name = "STOCK_NAME", unique = true, nullable = false, length = 20)
public String getStockName() {
return this.stockName;
}
public void setStockName(String stockName) {
this.stockName = stockName;
}
@OneToMany(fetch = FetchType.LAZY, mappedBy = "stock")
public Set<StockDailyRecord> getStockDailyRecords() {
return this.stockDailyRecords;
}
public void setStockDailyRecords(Set<StockDailyRecord> stockDailyRecords) {
this.stockDailyRecords = stockDailyRecords;
}
}
StockDailyRecord.java
package com.mc.stock;
import java.util.Date;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.UniqueConstraint;
@Entity
@Table(name = "stock_daily_record", uniqueConstraints = @UniqueConstraint(columnNames = "DATEX"))
public class StockDailyRecord implements java.io.Serializable {
private Integer recordId;
private Stock stock;
private Integer priceOpen;
private Integer priceClose;
private Integer priceChange;
private Long volume;
private Date date;
public StockDailyRecord() {
}
public StockDailyRecord(Stock stock, Date date) {
this.stock = stock;
this.date = date;
}
public StockDailyRecord(Stock stock, Integer priceOpen, Integer priceClose,
Integer priceChange, Long volume, Date date) {
this.stock = stock;
this.priceOpen = priceOpen;
this.priceClose = priceClose;
this.priceChange = priceChange;
this.volume = volume;
this.date = date;
}
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq_daily_record")
@SequenceGenerator(name = "seq_daily_record", sequenceName = "seq_daily_record", initialValue = 1, allocationSize = 1)
@Basic(optional = false)
@Column(name = "RECORD_ID", unique = true, nullable = false)
public Integer getRecordId() {
return this.recordId;
}
public void setRecordId(Integer recordId) {
this.recordId = recordId;
}
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "STOCK_ID", nullable = false)
public Stock getStock() {
return this.stock;
}
public void setStock(Stock stock) {
this.stock = stock;
}
@Column(name = "PRICE_OPEN", precision = 6)
public Integer getPriceOpen() {
return this.priceOpen;
}
public void setPriceOpen(Integer priceOpen) {
this.priceOpen = priceOpen;
}
@Column(name = "PRICE_CLOSE", precision = 6)
public Integer getPriceClose() {
return this.priceClose;
}
public void setPriceClose(Integer priceClose) {
this.priceClose = priceClose;
}
@Column(name = "PRICE_CHANGE", precision = 6)
public Integer getPriceChange() {
return this.priceChange;
}
public void setPriceChange(Integer priceChange) {
this.priceChange = priceChange;
}
@Column(name = "VOLUME")
public Long getVolume() {
return this.volume;
}
public void setVolume(Long volume) {
this.volume = volume;
}
@Temporal(TemporalType.DATE)
@Column(name = "DATEX", unique = true, nullable = false, length = 10)
public Date getDate() {
return this.date;
}
public void setDate(Date date) {
this.date = date;
}
}
当我尝试运行此测试时：
package com.mc;
import java.util.Date;
import org.hibernate.Session;
import com.mc.stock.Stock;
import com.mc.stock.StockDailyRecord;
import com.mc.util.HibernateUtil;
public class App {
public static void main(String[] args) {
System.out.println("Hibernate one to many (Annotation)");
Session session = HibernateUtil.getSessionFactory().openSession();
session.beginTransaction();
Stock stock = new Stock();
stock.setStockCode("7052");
stock.setStockName("PADINI");
session.save(stock);
StockDailyRecord stockDailyRecords = new StockDailyRecord();
stockDailyRecords.setPriceOpen(new Integer("2"));
stockDailyRecords.setPriceClose(new Integer("11"));
stockDailyRecords.setPriceChange(new Integer("10"));
stockDailyRecords.setVolume(30L);
stockDailyRecords.setDate(new Date());
stockDailyRecords.setStock(stock);
stock.getStockDailyRecords().add(stockDailyRecords);
session.save(stockDailyRecords);
session.getTransaction().commit();
System.out.println("Done");
}
}
我收到此错误：
2011-08-12_02:14:43.296 WARN o.h.util.JDBCExceptionReporter
- SQL Error: 2291, SQLState: 23000
2011-08-12_02:14:43.296 ERROR o.h.util.JDBCExceptionReporter
- ORA-02291: integrity constraint (HX.SYS_C004028) violated - parent key not found
2011-08-12_02:14:43.296 WARN o.h.util.JDBCExceptionReporter
- SQL Error: 2291, SQLState: 23000
2011-08-12_02:14:43.296 ERROR o.h.util.JDBCExceptionReporter
- ORA-02291: integrity constraint (HX.SYS_C004028) violated - parent key not found
Exception in thread "main" org.hibernate.exception.ConstraintViolationException:
Could not execute JDBC batch update
我是hibernate的新手，我会感谢任何帮助
提前致谢。
答案 0 :(得分：2)
您没有设置库存设置（setStockDailyRecords）的内容。我会尝试将setStockDailyRecords注释为
@OneToMany(fetch = FetchType.LAZY, mappedBy = "stock", inverse = "true")
这意味着该集合不是直接在数据库中创建的，而是使用反向关系（通过StockDailyRecord中的FK）检索它
更新以回答MHERO的第一条评论。
检查http://docs.jboss.org/hibernate/core/3.3/reference/en/html/collections.html#collections-mapping的逆属性。
您拥有的其他选项是在会话关闭之前移动保存（库存）（请记住使用适当的值设置setStockDailyRecords的集合。
答案 1 :(得分：0)
因此HX.SYS_C004028是STOCK和STOCKDAILYRECORD表之间的外键名称。这是一个强制执行业务规则的数据库约束，每个STOCKDAILYRECORD必须属于一个且只有一个STOCK记录。
约束将链接STOCKDAILYRECORD上的列和STOCK表的主键。如果你有一个理智的数据模型，列将共享相同的名称，我希望它是STOCKCODE列。
您可以通过查询数据字典来检查是否是这种情况：
select column_name from all_cons_columns
where owner = 'HX'
and constraint_name = 'SYS_C004028'
/
（顺便说一句，系统生成的约束名称很糟糕：我们在创建约束时可以包含有意义的名称，这在尝试调查这样的事情时非常有用。）
您没有填充STOCKCODE。所以也许Hibernate正在处理它，而不是正确地处理它。例如，默认的Hibernate行为是在父级之前的内部子记录。它有两种方法，但最好的方法是配置Hibernate，以便在子外键列上强制执行单向一对多映射。这可以通过设置not-null属性：
<set name="stockDailyRecord" lazy="true" cascade="all-delete-orphan">
<key column="STOCK_CODE_FK" not-null=”true” update=”false”/>
<one-to-many class="com.stock.dto.episode.StockDailyRecordDTO"/>
</set>
（您的命名惯例会有所不同）