java 中JFinal getModel方法和数据库使用出现问题解决办法

public void configPlugin(Plugins me) {
  C3p0Plugin cp = null;
  try {
   cp = new C3p0Plugin(
     "jdbc:mysql://localhost:3306/huaxuetang?useUnicode=true&characterEncoding=utf-8",
     "root", "1234");
   System.out.println("成功");
  } catch (Exception e) {
   System.out.println("连接失败");
  }
  me.add(cp);
  ActiveRecordPlugin arp = new ActiveRecordPlugin(cp);
  arp.setShowSql(true);
  me.add(arp);
  arp.addMapping("bse_user", "id", User.class);
  arp.addMapping("grade_one_choice","id",GOneQuestion.class);
 }

import com.jfinal.plugin.activerecord.Model;

public class GOneQuestion extends Model<GOneQuestion>{
 private static final long serialVersionUID = 1L;
 // 声明一个全局操作的变量
 public final static GOneQuestion questiondao = new GOneQuestion();
}

<input type="text" name="gOneQuestion.A" class="required" maxlength="50" style="width: 250px"/>

GOneQuestion question =getModel(GOneQuestion.class);

new GOneQuestion()
    .set("book", question.getStr("book"))
    .save();