mysql较为高效的分页_MySQL

DaoImpl:

/**

* 开发转让页面展示 ，查询搜索数据，并且分页展示

* @param zrdp 搜索条件封装对象

* @return

*/

@SuppressWarnings("unchecked")

public List showAllZrdpxxPageindex(Zrdpxx zrdp,int pageindex,String keys) {

Stringsql ="select * from zrdpxx where dpxx_htaiztai = 2";

if(zrdp!=null){

if(zrdp.getDpxxId()!=null&&!zrdp.getDpxxId().equals("")){

sql+=" and dpxx_id =" +zrdp.getDpxxId();

}

if(zrdp.getDpxxQyu()!=null&&!zrdp.getDpxxQyu().equals("-选择区域-")){

sql+=" and dpxx_qyu = '"+zrdp.getDpxxQyu()+"'";

}

if(zrdp.getDpxxPyetai()!=null&&!zrdp.getDpxxPyetai().equals("")){

sql+=" and dpxx_pyetai = '"+zrdp.getDpxxPyetai()+"'";

}

if(zrdp.getDpxxZyetai()!=null&&!zrdp.getDpxxZyetai().equals("0")&&!zrdp.getDpxxZyetai().equals("null")){

sql+=" and dpxx_zyetai = '"+zrdp.getDpxxZyetai()+"'";

}

if(zrdp.getBigmji()!=0&&zrdp.getSmlmj()!=-1){

sql += " and dpxx_mji between "+zrdp.getSmlmj()+" and " +zrdp.getBigmji();

}

//开始时间和结束时间均有值

if(zrdp.getBeginTime()!=null&&!zrdp.getBeginTime().equals("")&&zrdp.getEndTimes()!=null&&!zrdp.getEndTimes().equals("null")){

sql +=" and dpxx_fbusjian between '"+zrdp.getBeginTime()+"' and '"+zrdp.getEndTimes()+"'";

}

//只有开始时间

if(zrdp.getBeginTime()!=null&&!zrdp.getBeginTime().equals("")&&zrdp.getEndTimes()==null){

sql +=" and dpxx_fbusjian between '"+zrdp.getBeginTime()+"' and now()";

}

if(!("标题 地址 电话").equals(keys)){

sql +=" and (dpxx_bti like '%"+keys+"%' or tel like '%"+keys+"%' or dpxx_jtidzhi like '%"+keys+"%')";

}

sql +=" order by dpxx_fbusjian desc";

}

return getSession().createSQLQuery(sql).addEntity(Zrdpxx.class).setFirstResult((pageindex-1)*20).setMaxResults(20).list();

}

//public int getallzrdpcounts() {

//Object oo = getSession().createSQLQuery("select count(dpxx_id) from zrdpxx where dpxx_htaiztai =2").uniqueResult();

//return Integer.parseInt(oo.toString());

/