java - 未使用 hibernate 序列ID生成器

Question

我想以2019NEO0125格式生成序列ID，其中00125来自休眠序列发生器。这是我的代码来源：

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EnumType;
import javax.persistence.Enumerated;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

import org.hibernate.annotations.GenericGenerator;
import org.hibernate.annotations.Parameter;
import org.hibernate.validator.constraints.NotEmpty;
@Entity
@Table(name="tabe")
public class Neos implements Serializable{

    /**
     * 
     */
    private static final long serialVersionUID = 1L;


    @Id()
    @Column

    @GenericGenerator(
            name="reference",
            strategy = "ReferenceSequenceGenerator",
            parameters = {
                    @Parameter(name=ReferenceSequenceGenerator.DATE_FORMAT_PARAMETER , value="%tY")
            }
    )
    @GeneratedValue(generator = "reference")
    private Long reference;
//....

和发电机

import java.io.Serializable;
import java.util.Calendar;
import java.util.Properties;

import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.id.enhanced.SequenceStyleGenerator;
import org.hibernate.type.LongType;
import org.hibernate.type.Type;

import Neos;


public class ReferenceSequenceGenerator extends SequenceStyleGenerator{


    public static final String DATE_FORMAT_PARAMETER = "date_format";
    public static final String DATE_FORMAT_DEFAULT = "%tY-%tm";

    public static final String NUMBER_FORMAT_PARAMETER = "number_format";
    public static final String NUMBER_FORMAT_DEFAULT = "%05d";

    public static final String ROOT_PARAMETER = "root";
    public static final String ROOT_DEFAULT = "NEO";


    public static final String SEPARATOR = "separator";
    public static final String SEPARATOR_DEFAULT = "";

    private String format;

    @Override
    public Serializable generate(SessionImplementor session,
            Object object) throws HibernateException {
        return String.format(format, Calendar.getInstance() ,  ((Neos)object).getClient(), super.generate(session, object));
    }

    @Override
    public void configure(Type type, Properties params,
            Dialect d) throws MappingException {
        super.configure(new LongType(), params, d);

        String dateFormat = params.getProperty(DATE_FORMAT_PARAMETER, DATE_FORMAT_DEFAULT).replace("%" , "%1$");
        String numberFormat = params.getProperty(NUMBER_FORMAT_PARAMETER , NUMBER_FORMAT_DEFAULT).replace("%" , "%2$");
        String dateNumberSeparator = params.getProperty(SEPARATOR , SEPARATOR_DEFAULT);
        String root = params.getProperty(ROOT_PARAMETER , ROOT_DEFAULT);

        System.out.println(dateFormat + " -- " + numberFormat + "  --  " + dateNumberSeparator );

        this.format = dateFormat+root+dateNumberSeparator+numberFormat;
    }

}

所有编译，并自从工作正常。但是当我尝试查看数据库中的数据时，我得到了这些ID：

1
2
3
4
5

我认为我的发电机没有被调用。我在生成函数中添加了 System.out.println，但保存实体时未打印。

我尝试将 reference属性的类型更改为字符串。我有一个例外：

"org.hibernate.PropertyAccessException: could not set a field value by reflection setter of com.afb.dsi.scoring.jpa.Credit.reference",
        "could not set a field value by reflection setter of com.afb.dsi.scoring.jpa.Credit.reference",
        "Can not set java.lang.String field com.afb.dsi.scoring.jpa.Credit.reference to java.lang.Long"

注意：

休眠注释：3.5.6-最终

deltaspike：1.8.1

jpa：2.0

Answer 1

请使用您的ReferenceSequenceGenerator的完整路径

 @GenericGenerator(
        name="reference",
        strategy = "Neos.ReferenceSequenceGenerator",
        parameters = {
                @Parameter(name=ReferenceSequenceGenerator.DATE_FORMAT_PARAMETER , value="%tY")
        }
)