休止状態 – 1対1の例（注釈）

投稿日: 2019-11-05 2019-11-05
タグ: Hibernate, one-to-one

このチュートリアルでは、以前の ”

Hibernate 1対1の関係の例 – XMLマッピング

“チュートリアルのインフラストラクチャ全体を再利用して、 Hibernate/JPAアノテーション

プロジェクト構造

このチュートリアルの最終的なプロジェクト構造を参照してください。

プロジェクト構造、タイトル= "one-to-one-annotation-project-structure"、幅= 514 、高さ= 389

1.「1対1」のテーブル関係

前の1対1テーブル関係を再度参照してください。

1対1の関係、title = "1対1の関係"、width = 484、height = 160

2. Hibernateモデルクラス

Stock.java`と
StockDetail.java`の2つのモデルクラスを作成し、注釈コードを内部に配置します。

File:Stock.java

package com.mkyong.stock;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import static javax.persistence.GenerationType.IDENTITY;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;

@Entity
@Table(name = "stock", catalog = "mkyongdb", 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 StockDetail stockDetail;

    public Stock() {
    }

    public Stock(String stockCode, String stockName) {
        this.stockCode = stockCode;
        this.stockName = stockName;
    }

    public Stock(String stockCode, String stockName, StockDetail stockDetail) {
        this.stockCode = stockCode;
        this.stockName = stockName;
        this.stockDetail = stockDetail;
    }

    @Id
    @GeneratedValue(strategy = IDENTITY)
    @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;
    }

    @OneToOne(fetch = FetchType.LAZY, mappedBy = "stock", cascade = CascadeType.ALL)
    public StockDetail getStockDetail() {
        return this.stockDetail;
    }

    public void setStockDetail(StockDetail stockDetail) {
        this.stockDetail = stockDetail;
    }

}

ファイル:Stock Detail.java

package com.mkyong.stock;

import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
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 = "stock__detail", catalog = "mkyongdb")
public class StockDetail implements java.io.Serializable {

    private Integer stockId;
    private Stock stock;
    private String compName;
    private String compDesc;
    private String remark;
    private Date listedDate;

    public StockDetail() {
    }

    public StockDetail(Stock stock, String compName, String compDesc,
            String remark, Date listedDate) {
        this.stock = stock;
        this.compName = compName;
        this.compDesc = compDesc;
        this.remark = remark;
        this.listedDate = listedDate;
    }

    @GenericGenerator(name = "generator", strategy = "foreign",
    parameters = @Parameter(name = "property", value = "stock"))
    @Id
    @GeneratedValue(generator = "generator")
    @Column(name = "STOCK__ID", unique = true, nullable = false)
    public Integer getStockId() {
        return this.stockId;
    }

    public void setStockId(Integer stockId) {
        this.stockId = stockId;
    }

    @OneToOne(fetch = FetchType.LAZY)
    @PrimaryKeyJoinColumn
    public Stock getStock() {
        return this.stock;
    }

    public void setStock(Stock stock) {
        this.stock = stock;
    }

    @Column(name = "COMP__NAME", nullable = false, length = 100)
    public String getCompName() {
        return this.compName;
    }

    public void setCompName(String compName) {
        this.compName = compName;
    }

    @Column(name = "COMP__DESC", nullable = false)
    public String getCompDesc() {
        return this.compDesc;
    }

    public void setCompDesc(String compDesc) {
        this.compDesc = compDesc;
    }

    @Column(name = "REMARK", nullable = false)
    public String getRemark() {
        return this.remark;
    }

    public void setRemark(String remark) {
        this.remark = remark;
    }

    @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;
    }

}

3.ハイバネート設定ファイル

Hibernate設定ファイルに注釈付きクラス
Stock.java`と
StockDetail.java`を置きます。また、MySQL接続の詳細も入れます。

File:hibernate.cfg.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
    <property name="hibernate.connection.driver__class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/mkyongdb</property>
    <property name="hibernate.connection.username">root</property>
    <property name="hibernate.connection.password">password</property>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="show__sql">true</property>
    <mapping class="com.mkyong.stock.Stock"/>
    <mapping class="com.mkyong.stock.StockDetail"/>
</session-factory>
</hibernate-configuration>

4.それを実行する

これを実行すると、HibernateはSTOCKテーブルに行を挿入し、STOCK__DETAILテーブルに行を挿入します。

File:App.java

package com.mkyong;

import java.util.Date;

import org.hibernate.Session;

import com.mkyong.stock.Stock;
import com.mkyong.stock.StockDetail;
import com.mkyong.util.HibernateUtil;

public class App {
    public static void main(String[]args) {
        System.out.println("Hibernate one to one (Annotation)");
        Session session = HibernateUtil.getSessionFactory().openSession();

        session.beginTransaction();

        Stock stock = new Stock();

        stock.setStockCode("7052");
        stock.setStockName("PADINI");

        StockDetail stockDetail = new StockDetail();
        stockDetail.setCompName("PADINI Holding Malaysia");
        stockDetail.setCompDesc("one stop shopping");
        stockDetail.setRemark("vinci vinci");
        stockDetail.setListedDate(new Date());

        stock.setStockDetail(stockDetail);
        stockDetail.setStock(stock);

        session.save(stock);
        session.getTransaction().commit();

        System.out.println("Done");
    }
}

出力

Hibernate one to one (Annotation)
Hibernate: insert into mkyongdb.stock (STOCK__CODE, STOCK__NAME) values (?, ?)
Hibernate: insert into mkyongdb.stock__detail
(COMP__DESC, COMP__NAME, LISTED__DATE, REMARK, STOCK__ID) values (?, ?, ?, ?, ?)
Done

それをダウンロードしてください://wp-content/uploads/2011/04/Hibernate-one-to-one-annotation.zip[Hibernate-one-to-one-annotation、zip]（9KB）

リファレンス

http://docs.jboss.org/hibernate/core/3.6/reference/en-US/html/mapping.html#mapping-declaration-onetoone

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