hibernate 自定义UUID(mysql uuid_short)

UUID生成类

 
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.exception.JDBCExceptionHelper;
import org.hibernate.id.Configurable;
import org.hibernate.id.IdentifierGenerator;
import org.hibernate.type.Type;

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Properties;

/**
 * Created with IntelliJ IDEA.
 * User: Administrator
 * Date: 13-5-8
 * Time: 下午6:15
 * To change this template use File | Settings | File Templates.
 */
public class ShortUUIDIncrementGenerator implements IdentifierGenerator, Configurable {
    private static final Log log = LogFactory.getLog(ShortUUIDIncrementGenerator.class);
    private final String sql = "select uuid_short()";

    @Override
    public Serializable generate(SessionImplementor sessionImplementor, Object o) throws HibernateException {
        synchronized (this) {
            try {
                PreparedStatement st = sessionImplementor.getBatcher().prepareSelectStatement(sql);
                try {
                    ResultSet rs = st.executeQuery();
                    final long result;
                    try {
                        rs.next();
                        result = rs.getLong(1);
                    } finally {
                        rs.close();
                    }
                    log.debug("GUID identifier generated: " + result);
                    return result;
                } finally {
                    sessionImplementor.getBatcher().closeStatement(st);
                }
            } catch (SQLException e) {
                throw JDBCExceptionHelper.convert(
                        sessionImplementor.getFactory().getSQLExceptionConverter(),
                        e,
                        "could not retrieve GUID",
                        sql
                );
            }
        }
    }

    @Override
    public void configure(Type type, Properties properties, Dialect dialect) throws MappingException {
        //To change body of implemented methods use File | Settings | File Templates.
    }

}

配置：

    @Id
    @GeneratedValue(generator = "shortUid")
    @GenericGenerator(name = "shortUid", strategy = "com.up72.msi.util.ShortUUIDIncrementGenerator")
    @Column(name = "id", unique = true, nullable = false, insertable = true, updatable = true, length = 19)
    public java.lang.Long getId() {