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既存のデータベースと通信するプログラムがあります。複合キーとして従業員と車両を持つ複合テーブルがあります。従業員の編集または追加ページでは、従業員が好む車両を選択するためのドロップダウン ボックスがあり、従業員クラスのハッシュ テーブルに車両リストを保存します。ただし、リストは複合テーブルに永続化または保存されません。私は継ぎ目が初めてで、これを理解しようとして一日中過ごしました。どんな助けでも大歓迎です。

ここに私のクラスのいくつかがあります:

@Entity
@Table(name = "flower_store_employee", schema = "dbo", catalog = "tyler")
public class FlowerStoreEmployee implements java.io.Serializable, Comparable<FlowerStoreEmployee> {

/**
 * 
 */
private static final long serialVersionUID = -1727355085366851150L;
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name = "employee_id", unique = true, nullable = false)
private Integer employeeId;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "address_id")
private FlowerStoreAddress flowerStoreAddress;
@Column(name = "name_first", length = 25)
@Length(max = 25)
private String nameFirst;
@Column(name = "name_last", length = 25)
@Length(max = 25)
private String nameLast;
@Column(name = "ssn")
private String ssn;
@Column(name = "phone")
private String phone;
@Column(name = "pay")
private int pay;
@OneToMany(fetch = FetchType.LAZY, mappedBy = "flowerStoreEmployee")
private Set<FlowerStoreDelivery> flowerStoreDeliveries = new HashSet<FlowerStoreDelivery>(
        0);
@Cascade({org.hibernate.annotations.CascadeType.ALL })
@ManyToMany(fetch = FetchType.LAZY, mappedBy = "flowerStoreEmployees")
//@JoinTable(name = "flower_store_emp_vehicle", schema = "dbo", catalog = "tyler", joinColumns = { @JoinColumn(name = "vehicle_id", nullable = false, updatable = true) }, inverseJoinColumns = { @JoinColumn(name = "employee_id", nullable = false, updatable = true) })
private Set<FlowerStoreVehicle> flowerStoreVehicles = new HashSet<FlowerStoreVehicle>(
        0);
public FlowerStoreEmployee() {
}

public FlowerStoreEmployee(int employeeId) {
    this.employeeId = employeeId;
}

public FlowerStoreEmployee(FlowerStoreAddress flowerStoreAddress, String nameFirst,
        String nameLast, String ssn, String phone, int pay,
        Set<FlowerStoreDelivery> flowerStoreDeliveries,
        Set<FlowerStoreVehicle> flowerStoreVehicles) {
    this.employeeId = employeeId;
    this.flowerStoreAddress = flowerStoreAddress;
    this.nameFirst = nameFirst;
    this.nameLast = nameLast;
    this.ssn = ssn;
    this.phone = phone;
    this.pay = pay;
    this.flowerStoreDeliveries = flowerStoreDeliveries;
    this.flowerStoreVehicles = flowerStoreVehicles;
}


public int getEmployeeId() {
    return this.employeeId;
}

public void setEmployeeId(int employeeId) {
    this.employeeId = employeeId;
}


public FlowerStoreAddress getFlowerStoreAddress() {
    return this.flowerStoreAddress;
}

public void setFlowerStoreAddress(FlowerStoreAddress flowerStoreAddress) {
    this.flowerStoreAddress = flowerStoreAddress;
}


public String getNameFirst() {
    return this.nameFirst;
}

public void setNameFirst(String nameFirst) {
    this.nameFirst = nameFirst;
}


public String getNameLast() {
    return this.nameLast;
}

public void setNameLast(String nameLast) {
    this.nameLast = nameLast;
}


public String getSsn() {
    return this.ssn;
}

public void setSsn(String ssn) {
    this.ssn = ssn;
}


public String getPhone() {
    return this.phone;
}

public void setPhone(String phone) {
    this.phone = phone;
}


public int getPay() {

    return this.pay;
}

public void setPay(int pay) {
    this.pay = pay;
}

public void setPay(String pay){
    this.pay = Integer.parseInt(pay);
}

public Set<FlowerStoreDelivery> getFlowerStoreDeliveries() {
    return this.flowerStoreDeliveries;
}

public void setFlowerStoreDeliveries(
        Set<FlowerStoreDelivery> flowerStoreDeliveries) {
    this.flowerStoreDeliveries = flowerStoreDeliveries;
}


public Set<FlowerStoreVehicle> getFlowerStoreVehicles() {
    return this.flowerStoreVehicles;
}

public void setFlowerStoreVehicles(
        Set<FlowerStoreVehicle> flowerStoreVehicles) {
    this.flowerStoreVehicles = flowerStoreVehicles;
}

public int compareTo(FlowerStoreEmployee emp) {
    if(this.employeeId > emp.employeeId){
        return 1;
    }
    else 
        if(this.employeeId < emp.employeeId){
                return -1;
        }
    else{
        return 0;
    }
}

車両：

@Entity
@Table(name = "flower_store_vehicle", schema = "dbo", catalog = "tyler")
public class FlowerStoreVehicle implements java.io.Serializable {

/**
 * 
 */
private static final long serialVersionUID = 5349431404739349258L;
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name = "vehicle_id", unique = true, nullable = false)
private int vehicleId;
@Column(name = "vin", length = 17)
@Length(max = 17)
private String vin;
@Column(name = "license", length = 10)
@Length(max = 10)
private String license;
@Column(name = "make", length = 15)
@Length(max = 15)
private String make;
@Column(name = "model", length = 20)
@Length(max = 20)
private String model;
@Column(name = "color", length = 20)
@Length(max = 20)
private String color;
@OneToMany(fetch = FetchType.LAZY, mappedBy = "flowerStoreVehicle")
private Set<FlowerStoreDelivery> flowerStoreDeliveries = new HashSet<FlowerStoreDelivery>(
        0);
@ManyToMany(fetch = FetchType.LAZY)
@JoinTable(name = "flower_store_emp_vehicle", schema = "dbo", catalog = "tyler", joinColumns = { @JoinColumn(name = "vehicle_id", nullable = false, updatable = false) }, inverseJoinColumns = { @JoinColumn(name = "employee_id", nullable = false, updatable = false) })
private Set<FlowerStoreEmployee> flowerStoreEmployees = new HashSet<FlowerStoreEmployee>(
        0);

public FlowerStoreVehicle() {
}

public FlowerStoreVehicle(int vehicleId) {
    this.vehicleId = vehicleId;
}

public FlowerStoreVehicle(int vehicleId, String vin, String license,
        String make, String model, String color,
        Set<FlowerStoreDelivery> flowerStoreDeliveries,
        Set<FlowerStoreEmployee> flowerStoreEmployees) {
    this.vehicleId = vehicleId;
    this.vin = vin;
    this.license = license;
    this.make = make;
    this.model = model;
    this.color = color;
    this.flowerStoreDeliveries = flowerStoreDeliveries;
    this.flowerStoreEmployees = flowerStoreEmployees;
}

public int getVehicleId() {
    return this.vehicleId;
}

public void setVehicleId(int vehicleId) {
    this.vehicleId = vehicleId;
}

public String getVin() {
    return this.vin;
}

public void setVin(String vin) {
    this.vin = vin;
}

public String getLicense() {
    return this.license;
}

public void setLicense(String license) {
    this.license = license;
}

public String getMake() {
    return this.make;
}

public void setMake(String make) {
    this.make = make;
}

public String getModel() {
    return this.model;
}

public void setModel(String model) {
    this.model = model;
}

public String getColor() {
    return this.color;
}

public void setColor(String color) {
    this.color = color;
}


public Set<FlowerStoreDelivery> getFlowerStoreDeliveries() {
    return this.flowerStoreDeliveries;
}

public void setFlowerStoreDeliveries(
        Set<FlowerStoreDelivery> flowerStoreDeliveries) {
    this.flowerStoreDeliveries = flowerStoreDeliveries;
}

public Set<FlowerStoreEmployee> getFlowerStoreEmployees() {
    return this.flowerStoreEmployees;
}

public void setFlowerStoreEmployees(
        Set<FlowerStoreEmployee> flowerStoreEmployees) {
    this.flowerStoreEmployees = flowerStoreEmployees;
}

}

複合テーブル ID:

/**
 * FlowerStoreEmpVehicleId generated by hbm2java
 */
@Embeddable
public class FlowerStoreEmpVehicleId implements java.io.Serializable {

private int vehicleId;
private int employeeId;

public FlowerStoreEmpVehicleId() {
}

public FlowerStoreEmpVehicleId(int vehicleId, int employeeId) {
    this.vehicleId = vehicleId;
    this.employeeId = employeeId;
}

@Column(name = "vehicle_id", nullable = false)
public int getVehicleId() {
    return this.vehicleId;
}

public void setVehicleId(int vehicleId) {
    this.vehicleId = vehicleId;
}

@Column(name = "employee_id", nullable = false)
public int getEmployeeId() {
    return this.employeeId;
}

public void setEmployeeId(int employeeId) {
    this.employeeId = employeeId;
}

public boolean equals(Object other) {
    if ((this == other))
        return true;
    if ((other == null))
        return false;
    if (!(other instanceof FlowerStoreEmpVehicleId))
        return false;
    FlowerStoreEmpVehicleId castOther = (FlowerStoreEmpVehicleId) other;

    return (this.getVehicleId() == castOther.getVehicleId())
            && (this.getEmployeeId() == castOther.getEmployeeId());
}

public int hashCode() {
    int result = 17;

    result = 37 * result + this.getVehicleId();
    result = 37 * result + this.getEmployeeId();
    return result;
}

}

複合テーブル:

@Entity
@Table(name = "flower_store_emp_vehicle", schema = "dbo", catalog = "tyler")
public class FlowerStoreEmpVehicle implements java.io.Serializable {

private FlowerStoreEmpVehicleId id;

public FlowerStoreEmpVehicle() {
}

public FlowerStoreEmpVehicle(FlowerStoreEmpVehicleId id) {
    this.id = id;
}

@EmbeddedId
@AttributeOverrides({
        @AttributeOverride(name = "vehicleId", column = @Column(name = "vehicle_id", nullable = false)),
        @AttributeOverride(name = "employeeId", column = @Column(name = "employee_id", nullable = false)) })
@NotNull
public FlowerStoreEmpVehicleId getId() {
    return this.id;
}

public void setId(FlowerStoreEmpVehicleId id) {
    this.id = id;
}

}

従業員を保存するコードは次のとおりです。

public String addEmployee(){
    Set<FlowerStoreVehicle> vehicleSet = new HashSet<FlowerStoreVehicle>();
    FlowerStoreEmployee n = new FlowerStoreEmployee();
    if(first!=null && first!=""){
        n.setNameFirst(first);
    }
    if(last!=null && last!=""){
        n.setNameLast(last);
    }
    if(pay!=null && pay!=""){
        int intPay = (int)(Double.parseDouble(pay)*100);
        n.setPay(intPay);
    }
    if(phone!=null && phone!=""){
        n.setPhone(phone);
    }
    if(ssn!=null && ssn!=""){
        n.setSsn(ssn);
    }
    if(vehicle!=null && vehicle!=""){
        String[] vehStr = vehicle.split(" ");
        for(int i = 0; i < vehStr.length; i++){
            int vehId = Integer.parseInt(vehStr[i]);
            vehicleSet.add(entityManager.find(FlowerStoreVehicle.class, vehId));
        }
    }
    if(!vehicleSet.isEmpty()){
        n.setFlowerStoreVehicles(vehicleSet);
    }
    entityManager.persist(n);
    if(zip!=null && zip!=""){
        FlowerStoreZip zipCode = entityManager.find(FlowerStoreZip.class, Integer.parseInt(zip));
        if(zipCode==null){
            zipCode = new FlowerStoreZip();
            if(zip!=null && zip!=""){
                zipCode.setZipCode(Integer.parseInt(zip));
        }
        if(city!=null && city!=""){
            zipCode.setCity(city);
        }
        if(state!=null && city!=""){
            zipCode.setState(state);
        }
        entityManager.persist(zipCode);
        }
    }
    FlowerStoreAddress add = new FlowerStoreAddress();
    if(house!=null && house!=""){
        add.setHouseNumber(Integer.parseInt(house));
    }
    if(street!=null && street!=""){
        add.setStreet(street);
    }
    if(zip!=null && zip!=""){
        add.setFlowerStoreZip(entityManager.find(FlowerStoreZip.class, Integer.parseInt(zip)));
    }
    return "/employee.xhtml";
}

さらに情報が必要な場合は、お知らせください。どんな助けでも大歓迎です。ありがとうございました

4

2 に答える 2

1

まず、コードを確認してください。バグのある命令がたくさんあります。Java では、次のequals()ように Strings をメソッドと比較しますssn != ""。

問題の根本は Seam 自体ではなく、Hibernate にあります。まず、 を使用して車両セットに要素を追加します。n.getFlowerStoreVehicles().add(...)セット全体を で再割り当てしないでくださいn.setFlowerStoreVehicles(...)(これは、エンティティの作成中はおそらく問題になりませんが、エンティティが永続化された後にセットを変更するときに問題になります。

リレーションシップが正しく永続化されない理由は、FlowerStoreEmployee がリレーションシップの「弱い」側 (アノテーションに「mappedBy」属性を持つ側) であるためです。@JoinTableアノテーションを FlowerStoreEmployee クラスに移動し、FlowerStoreVehicle から削除し、FlowerStoreEmployee から を削除してmappedBy、FlowerStoreVehicle に配置します ( mappedBy="flowerStoreVehicles")。関係は双方向であるため、関係の両側に割り当てます。

FlowerStoreVehicle veh = entityManager.find(FlowerStoreVehicle.class, vehId);
veh.getFlowerStoreEmployees().add(n); // one direction: vehicle -> employee
n.getFlowerStoreVehicles().add(veh);  // the other direction: employee -> vehicle
于 2012-06-07T17:19:23.490 に答える
0

コードの最後にentityManager.persistはありませんが、ZipCodeを永続化することを除けば、オブジェクトは永続化されません。

于 2012-06-07T10:00:10.033 に答える