显示用户名称，但是保存到数据库里的是userID,怎么样实现按用户名称查询

下面代码实现了，显示用户名称，但是保存到数据库里的是userID，但是现在想要实现，按用户名称查询，请问各位大神，action,dao,jsp里，下边的代码应该怎么写？跪求

 public String getList() throws Exception
    {


          chengJiJiLuList = dao.getList(TrainingOrCompetitionID,userID,startTime,endTime);

          userList = this.getUserLisAll();
         return SUCCESS;
    }

    public ArrayList getUserLisAll() throws Exception {
           Users user = new Users();
           ArrayList userList = new ArrayList<Users>();
           service.getObjList(userList, user, " oid in (select id from organization)", " id");
           return userList;
       }

 public List<ChengJiJiLu>   getList(int trainingOrCompetitionID,int userid,String startTime,String endTime)
    {
        String where = " ";
        where = where + " and " +  TypeChange.DateBetweenSql("a.shiJian", startTime, endTime)+ " and " +"TrainingOrCompetitionID="+trainingOrCompetitionID;
            return this.findAll(where);
    }

  用户名称:<s:textfield name="keRenMingCheng" size="8" value="%{keRenMingCheng}"/>&nbsp;&nbsp;


    <TR>
       <TH width="10"><s:checkbox id="doAllSele" value="" onclick="selectAll()" name="doAllSele"></s:checkbox></TH>
       <TH width="30"> 序号</TH>
       <TH>用户名称</TH>
       <%--<TH>TrainingOrCompetitionID</TH>--%>
       <TH>时间</TH>
       <TH>项目</TH>
       <TH>状态</TH>
       <TH>备注</TH>
    </TR>
<s:iterator value="chengJiJiLuList" status="st" var="cil">
    <TR>
       <TD><input type="checkbox" name="selId" id="selId" value="<s:property value="id"/>"/></TD>
       <TD  align="center"><s:property value='#st.index+1'/></TD>
       <TD ><s:iterator value="userList" var="ulist">
                                <s:if test="#ulist.id==#cil.userID"><s:property value="#ulist.name"/></s:if>
                            </s:iterator></TD>
       <%--<TD ><s:property value="trainingOrCompetitionID"/></TD>--%>
       <TD  align="center"><s:date name="shiJian" format="yyyy-MM-dd" /></TD>
       <TD ><s:property value="xiangMu"/></TD>
       <TD ><s:property value="zhuangTai"/></TD>
       <TD ><s:property value="beiZhu"/></TD>
    </TR>

数据库的属性里有姓名属性吧？考虑重名问题的话是不是只能查出一个列表？？