Hibernate - 1対多の例（注釈）

Hibernate – 1対多の例（注釈）

このチュートリアルでは、以前の「http://www.example.com/hibernate/hibernate-one-to-many-relationship-example/ [Hibernateの1対多の関係の例–XMLマッピング]」のインフラストラクチャ全体を再利用します。チュートリアル、Hibernate / JPAアノテーションをサポートするように拡張します。

プロジェクト構造

このチュートリアルの新しいプロジェクト構造を確認してください。

one to many annotation folder

Note
Hibernate 3.6以降、注釈コードはHibernateコアモジュールにマージされるため、previous pom.xmlファイルを再利用できます。

1. 「1対多」テーブル関係

前の1対多テーブルの関係をもう一度参照してください。

one to many table relationship

2. Hibernateモデルクラス

以前のモデルクラス–Stock.javaおよびStockDailyRecord.javaを更新し、内部に注釈コードを定義します。

ファイル：Stock.java

package com.example.stock;

import java.util.HashSet;
import java.util.Set;
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.OneToMany;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;

@Entity
@Table(name = "stock", catalog = "exampledb", 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 stockDailyRecords = new HashSet(
            0);

    public Stock() {
    }

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

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

    @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;
    }

    @OneToMany(fetch = FetchType.LAZY, mappedBy = "stock")
    public Set getStockDailyRecords() {
        return this.stockDailyRecords;
    }

    public void setStockDailyRecords(Set stockDailyRecords) {
        this.stockDailyRecords = stockDailyRecords;
    }

}

ファイル：StockDailyRecord.java

package com.example.stock;

import java.util.Date;
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.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.UniqueConstraint;

@Entity
@Table(name = "stock_daily_record", catalog = "exampledb",
uniqueConstraints = @UniqueConstraint(columnNames = "DATE"))
public class StockDailyRecord implements java.io.Serializable {

    private Integer recordId;
    private Stock stock;
    private Float priceOpen;
    private Float priceClose;
    private Float 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, Float priceOpen, Float priceClose,
            Float 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 = IDENTITY)
    @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 Float getPriceOpen() {
        return this.priceOpen;
    }

    public void setPriceOpen(Float priceOpen) {
        this.priceOpen = priceOpen;
    }

    @Column(name = "PRICE_CLOSE", precision = 6)
    public Float getPriceClose() {
        return this.priceClose;
    }

    public void setPriceClose(Float priceClose) {
        this.priceClose = priceClose;
    }

    @Column(name = "PRICE_CHANGE", precision = 6)
    public Float getPriceChange() {
        return this.priceChange;
    }

    public void setPriceChange(Float 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 = "DATE", unique = true, nullable = false, length = 10)
    public Date getDate() {
        return this.date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

}

3. Hibernate設定ファイル

注釈付きクラスStock.javaとStockDailyRecord.javaを次のようにhibernate.cfg.xmlに配置します：

ファイル：hibernate.cfg.xml





    com.mysql.jdbc.Driver
    jdbc:mysql://localhost:3306/exampledb
    root
    password
    org.hibernate.dialect.MySQLDialect
    true

4. それを実行します

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

ファイル：App.java

package com.example;

import java.util.Date;

import org.hibernate.Session;

import com.example.stock.Stock;
import com.example.stock.StockDailyRecord;
import com.example.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 Float("1.2"));
        stockDailyRecords.setPriceClose(new Float("1.1"));
        stockDailyRecords.setPriceChange(new Float("10.0"));
        stockDailyRecords.setVolume(3000000L);
        stockDailyRecords.setDate(new Date());

        stockDailyRecords.setStock(stock);
        stock.getStockDailyRecords().add(stockDailyRecords);

        session.save(stockDailyRecords);

    session.getTransaction().commit();
    System.out.println("Done");
    }
}

出力

Hibernate one to many (Annotation)
Hibernate:
    insert
    into
        exampledb.stock
        (STOCK_CODE, STOCK_NAME)
    values
        (?, ?)
Hibernate:
    insert
    into
        exampledb.stock_daily_record
        (DATE, PRICE_CHANGE, PRICE_CLOSE, PRICE_OPEN, STOCK_ID, VOLUME)
    values
        (?, ?, ?, ?, ?, ?)
Done

ダウンロード–Hibernate-one-to-many-annotation.zip（9KB）

参照

Hibernateドキュメント–1対多の関係

TOC

Hibernate - 1対多の例（注釈）