Java server-side paging processing and datatables with query condition examples

  

     
    
  

  

    

      

        
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@RequestMapping(value="/datatablesTest", method=RequestMethod.GET)
  @ResponseBody
  public DatatablesViewPage datatablesTest(HttpServletRequest request){
//获取分页控件的信息
    String start = request.getParameter("start");
    System.out.println(start);
        String length = request.getParameter("length");
    System.out.println(length);
//获取前台额外传递过来的查询条件
    String extra_search = request.getParameter("extra_search");
    System.out.println(extra_search);
        //随便组织的查询结果
    List list = new ArrayList();
    Alarm alarm = new Alarm();
    alarm.setLevel(1);
    alarm.setTotal(100L);
    list.add(alarm);
    alarm = new Alarm();
    alarm.setLevel(2);
    alarm.setTotal(100L);
    list.add(alarm);


    DatatablesViewPage view = new DatatablesViewPage();
    view.setiTotalDisplayRecords(100);
    view.setiTotalRecords(100);

    view.setAaData(list);
    return view;
  }

public class DatatablesViewPage {

  private List aaData; //aaData 与datatales 加载的“dataSrc"对应
  private int iTotalDisplayRecords; 
  private int iTotalRecords;
  public DatatablesViewPage() {

  }
//get set方法 此处省略

}

@ResponseBody
  @RequestMapping("/datatable2")
  public JSON getTable2(String aoData){
    String sEcho = "";// 记录操作的次数 每次加1
    String iDisplayStart = "";// 起始
    String iDisplayLength = "";// size
    String sSearch = "";// 搜索的关键字
    int count = 1 ; //查询出来的数量
    JSONArray alldata = JSON.parseArray(aoData);
    for (int i = 0; i  listMap = new HashMap();
    List list = new ArrayList();
    list.add(u1);
    listMap.put("iTotalRecords",count);
    listMap.put("sEcho",Integer.parseInt(sEcho)+1);
    listMap.put("iTotalDisplayRecords",count);
    listMap.put("aaData",list);
    return (JSON)JSON.toJSON(listMap);
  }