求解下列代码，我现在就是基础，知道每个函数，方法的意思，但是不知道它们是为了什么创建，用来干什么

Question

求解下列代码，我现在就是基础，知道每个函数，方法的意思，但是不知道它们是为了什么创建，用来干什么，求大神帮忙

  public String getByTrainingOrCompetitionID()  throws Exception
    {

          zheJiuSheZhiList = dao.getList(shengChanXianID);
        if(zheJiuSheZhiList.size()>0)
        {
            zheJiuSheZhi=zheJiuSheZhiList.get(0);
            id = zheJiuSheZhi.getId();
        }else {
            zheJiuSheZhi = new ZheJiuSheZhi();
            zheJiuSheZhi.setShengChanXianID(shengChanXianID);
            zheJiuSheZhi.setTrainingOrCompetitionID(TrainingOrCompetitionID);
            id = dao.save(zheJiuSheZhi);
             zheJiuSheZhi = dao.get(id);
        }

Answer 1

前台需要根据shengChanXianID来查询的结果返回的数据