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OneToOne単方向マッピングによって関連付けられたテーブルを作成しようとしています。 私は小さなデモプログラムを書いていますが、表は作成されていますが、null値を示しています。コンソールに例外はありません。hibernate OneToOne単方向マッピング
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/emprec</property>
<property name="connection.username">***</property>
<property name="connection.password">***</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">create</property>
<!-- Mention here all the model classes along with their package name -->
<mapping class="com.abc.unidirectional.Stock"/>
<mapping class="com.abc.unidirectional.StockDailyRecords"/>
</session-factory>
</hibernate-configuration>
おかげ
package com.abc.unidirectional;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "OneToOne_Stock_Unidirectional")
public class Stock implements java.io.Serializable {
private static final long serialVersionId=1L;
@Id
@GeneratedValue
private int stockId;
private String stockCode;
private String stockName;
private StockDailyRecords stockDailyRecords;
public Stock() {
}
public int getStockId() {
return stockId;
}
public void setStockId(int stockId) {
this.stockId = stockId;
}
public String getStockCode() {
return this.stockCode;
}
public void setStockCode(String stockCode) {
this.stockCode = stockCode;
}
public String getStockName() {
return this.stockName;
}
public void setStockName(String stockName) {
this.stockName = stockName;
}
public StockDailyRecords getStockDailyRecords() {
return stockDailyRecords;
}
public void setStockDailyRecords(StockDailyRecords stockDailyRecords) {
this.stockDailyRecords = stockDailyRecords;
}
@Override
public String toString() {
return "Stock [stockId=" + stockId + ", stockCode=" + stockCode + ", stockName=" + stockName
+ ", stockDailyRecords=" + stockDailyRecords + "]";
}
}
は、これはこれはこれは、hibernate.cfg.xmlファイルである
package com.abc.unidirectional;
import java.util.Date;
import org.hibernate.Transaction;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import com.cavalier.unidirectional.HibernateUtil;
import org.hibernate.cfg.AnnotationConfiguration;
public class Main {
public static void main(String[] args) {
Main obj = new Main();
obj.saveInTable();
}
public Integer saveInTable(){
Stock stock = new Stock();
stock.setStockCode("705");
stock.setStockName("MICROSOFT");
StockDailyRecords sdrecords1 = new StockDailyRecords();
sdrecords1.setPriceOpen(50.30);
sdrecords1.setPriceClose(80);
sdrecords1.setPriceChange(10.9f);
sdrecords1.setListedDate(new Date());
sdrecords1.setStock(stock);
stock.setStockDailyRecords(sdrecords1);
SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
Session session= sessionFactory.openSession();
Transaction transaction = null;
Integer stockId = null;
try {
transaction = session.beginTransaction();
session.save(stock);
session.save(sdrecords1);
transaction.commit();
} catch (HibernateException e) {
transaction.rollback();
e.printStackTrace();
} finally {
session.close();
sessionFactory.close();
}
return stockId; //returns serializable primary key
}
}
私のメインクラスです
package com.abc.unidirectional;
import java.util.Date;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;
import javax.persistence.PrimaryKeyJoinColumn;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import org.hibernate.annotations.GenericGenerator;
import org.hibernate.annotations.Parameter;
@Entity
@Table(name = "OneToOne_Unidirectional")
public class StockDailyRecords implements java.io.Serializable {
private static final long serialVersionId = 1L;
@Id
@GeneratedValue(generator = "newGenerator") //name of the primary key generator
@GenericGenerator(name = "newGenerator", strategy = "foreign",parameters = { @Parameter(value = "stockDailyRecords", name = "property") })
private int stockId;
private String recordId;
private double priceOpen;
private double priceClose;
private float priceChange;
private Date listedDate;
@OneToOne
@JoinColumn(name = "stockId")
private Stock stock;
public StockDailyRecords() {
}
public int getStockId() {
return stockId;
}
public void setStockId(int stockId) {
this.stockId = stockId;
}
public String getRecordId() {
return recordId;
}
public void setRecordId(String recordId) {
this.recordId = recordId;
}
public Stock getStock() {
return this.stock;
}
public void setStock(Stock stock) {
this.stock = stock;
}
public double getPriceOpen() {
return priceOpen;
}
public void setPriceOpen(double priceOpen) {
this.priceOpen = priceOpen;
}
public double getPriceClose() {
return priceClose;
}
public void setPriceClose(double priceClose) {
this.priceClose = priceClose;
}
public float getPriceChange() {
return priceChange;
}
public void setPriceChange(float priceChange) {
this.priceChange = priceChange;
}
//@Temporal(TemporalType.DATE)
//@Column(name = "LISTED_DATE", nullable = false, length = 10)
public Date getListedDate() {
return this.listedDate;
}
public void setListedDate(Date listedDate) {
this.listedDate = listedDate;
}
@Override
public String toString() {
return "StockDailyRecords [stockId=" + stockId + ", recordId=" + recordId + ", priceOpen=" + priceOpen
+ ", priceClose=" + priceClose + ", priceChange=" + priceChange + ", listedDate=" + listedDate
+ ", stock=" + stock + "]";
}
}
StockDailyRecordsクラスです
あなたの問題は何ですか？ – Unknown