sigma grid 服务端分页

一，获得sigma 发送的服务端的 _gt_json

request.getParameter("_gt_json")

{"recordType":"object","pageInfo":{"pageSize":10,"pageNum":1,"totalRowNum":-1,"totalPageNum":0,"startRowNum":1,"endRowNum":-1},...

二，利用json工具获得pageInfo的pageSize，pageNum（jackson）

ObjectMapper mapper = new ObjectMapper();
   Map map=mapper.readValue(_gt_json,Map.class );
   Map map2=(Map) map.get("pageInfo");  
   int pageNum=(Integer) map2.get("pageNum");
   int pageSize=(Integer) map2.get("pageSize");

三，分页查询(mysql)

sql="SELECT * FROM auction_user LIMIT ?,?" //  (pageNum-1)*pageSize,pageSize)

int totalRowNum=  select count(1) from auction_user //

四，返回数据格式

   {

     pageInfo:{totalRowNum:17},

    data : [{"userId":12,"username":"tian","userpass":"s","email":"a","mobile":"s"},......]

}

 out.write("{ pageInfo:{totalRowNum:"+String.valueOf(totalRowNum)+"},");
  out.write(" data : "+mapper.writeValueAsString(pageUser)+" }");