怎么生成 数字+字符的自增主键 hibernate+oracle

解决方法：继承IdentifierGenerator,Configurable 这2个接口

package com.testplatform.idGenerator;
 
import java.io.Serializable;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Properties;
 
 
import org.apache.log4j.Logger;
import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.id.Configurable;
import org.hibernate.id.IdentifierGenerator;
import org.hibernate.type.Type;
 
 
public class IDGenerator implements IdentifierGenerator,Configurable {
 
    private String prefix;
    private String seq;
    static Logger log4j = Logger.getLogger(IDGenerator.class.getClass());
    public Serializable generate(SessionImplementor session, Object arg1)
            throws HibernateException {
        // TODO Auto-generated method stub
         
         Connection connection = session.connection();
            try {
                //SELECT seq_date_info_id.nextval from dual;
                PreparedStatement ps = connection
                        .prepareStatement("SELECT "+seq+".nextval from dual");
 
                ResultSet rs = ps.executeQuery();
                if (rs.next()) {
                    int id = rs.getInt("nextval");
                    String code = prefix+id;
                    //String code = prefix + StringUtils.leftPad("" + id,3, '0');
                    log4j.warn("IDGenerator: " + code);
                    return code;
                }
 
            } catch (SQLException e) {
                log4j.warn(e);
                throw new HibernateException(
                        "Unable to generate id ");
            }
        return null;
    }
    public void configure(Type arg0, Properties params, Dialect arg2)
            throws MappingException {
        // TODO Auto-generated method stub
//        System.out.println("configure");
/*        table = params.getProperty("table");
          if (table == null)
           table = params.getProperty(PersistentIdentifierGenerator.TABLE);*/
          seq = params.getProperty("seq");
          prefix = params.getProperty("prefix");
    }
 
}