在JAVA中如何获取list的值

Question

这是来源

     @Override
    public List getYxzyListByYwslidZsk(Long ywslid) {
        StringBuilder hql = new StringBuilder();
        hql.append(" from " + ZSK + "  t where t.ywslid = " + ywslid);
        List list = this.findByQuery(hql.toString());
        if (list != null && !list.isEmpty()){
            return list; }
        else{return null;}
    }

下面这个是使用页面，其实已经判断不为空了，然后取出的时候报错空指针，看了看类型是对的，不知道怎么取。

                List<TpgGzfYxzy> tpgGzfYxzyList=gzfYxzyService.getYxzyListByYwslidZsk(ywslid);
                if (tpgGzfYxzyList!=null){
                    for (TpgGzfYxzy tpgGzfYxzy:tpgGzfYxzyList){
                        System.out.println(tpgGzfYxzy.getZyxl());
                        if (tpgGzfYxzy.getZyxl()==4){
                            row.setData("fourthfyd",tpgGzfYxzy.getYxdmc());};
                        if (tpgGzfYxzy.getZyxl()==5){
                            row.setData("fifthfyd",tpgGzfYxzy.getYxdmc());};
                        if (tpgGzfYxzy.getZyxl()==6){
                            row.setData("sixthfyd",tpgGzfYxzy.getYxdmc());};
                        if (tpgGzfYxzy.getZyxl()==7){
                            row.setData("seventhfyd",tpgGzfYxzy.getYxdmc());};
                    }
                }

Answer 1

@Override
public List getYxzyListByYwslidZsk(Long ywslid) {
StringBuilder hql = new StringBuilder();
hql.append(" from " + ZSK + " t where t.ywslid = " + ywslid);
List list = this.findByQuery(hql.toString());
if (list != null && !list.isEmpty())｛
return list;
｝else{
return null;
}
}