我应该如何将实体类中的外键映射到模型类(pojo)对象

Question

用户的模型类：

@Component
public class UserModel {
private Integer userId;
private Integer roleId;
private String firstName;
private String email;
private String password;
public Integer getUserId() {
return userId;
}
public Integer getRoleId() {
return roleId;
}
public String getFirstName() {
return firstName;
}
public String getEmail() {
return email;
}
public String getPassword() {
return password;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
public void setRoleId(Integer roleId) {
this.roleId = roleId;
}
public void setName(String firstName) {
this.firstName = firstName;
}
public void setEmail(String email) {
this.email = email;
}
public void setPassword(String password) {
this.password = password;
}
}

用户角色的模型类：

@Component
public class RolesModel {
private Integer roleId;
private String roleName;
public Integer getRoleId() {
return roleId;
}
public void setRoleId(Integer roleId) {
this.roleId = roleId;
}
public String getRoleName() {
return roleName;
}
public void setRoleName(String roleName) {
this.roleName = roleName;
}
}

用户的实体类：

@Entity
@Table(name = "userBloodBank")
public class User {

@Id
@GeneratedValue (strategy = GenerationType.AUTO)
private Integer userId;

@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name="roleId")
private Roles roles;

@NotNull
@Column
@Pattern(regexp="[A-Z][a-zA-Z]*",message="Only enter words starting with captital letter")
private String firstName;

@NotNull
@Column
@Email
@Pattern(regexp = "^[a-zA-Z0-9+_.-]+@[a-zA-Z0-9.-]+$", message = "Enter a proper email ID")
private String email;

@NotNull
@Column
@Pattern(regexp= "^(?=.*[0-9])"
+ "(?=.*[a-z])(?=.*[A-Z])"
+ "(?=.*[@#$%^&+=])"
+ "(?=\S+$).{8,20}$", message="Enter minimum 8 characters and maximum 20 characters")
private String password;
public Integer getUserId() {
return userId;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
public Roles getRoles() {
return roles;
}
public void setRoles(Roles roles) {
this.roles = roles;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}

角色的实体类：

@Entity
@Table(name="Roles")
public class Roles {

@Id
@GeneratedValue (strategy = GenerationType.AUTO)
private Integer roleId;

@NotNull
@Column
@Pattern(regexp="(Recipient|Donor|BloodBankAdmin|Admin)", message = "Choose among Recipient|Donor|BloodBankAdmin|Admin")
private String roleName;

public Integer getRoleId() {
return roleId;
}
public void setRoleId(Integer roleId) {
this.roleId = roleId;
}
public String getRoleName() {
return roleName;
}
public void setRoleName(String roleName) {
this.roleName = roleName;
}

}

在上述情况下，角色Id具有oneToOne关系，我将如何将其映射到角色和用户的模型对象？帮助我创建函数"的代码；convertModelToEntity(("；以及"；convertEntityToModel"；。

Answer 1

您可以在User实体类中添加以下代码，以将实体映射到Model。

public static UserModel convertEntityToModel(User user) {
UserModel userModel = new UserModel();
userModel.setUserId(user.getUserId());
userModel.setRoleId(user.getRoles().getRoleId());
userModel.setFirstName(user.getFirstName());
userModel.setEmail(user.getEmail());
userModel.setPassword(user.getPassword());
return userModel;
}

这将返回用户模型。

我认为您应该在用户模型中添加角色模型(或角色模型列表(。