datatable传参和后台处理

1.html

    

        

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2.javaScript

script>
    $(function () {
        var oTable145=$("#search145").DataTable({
            "ajax":{
                "url":"search/search145",
                "type":"POST"
            },
            "autoWidth":true,//自动计算列宽
            "scrollX": true,
            "paging": true,//分页，默认true
            "bSort": false,//能否对列进行排序操作
            "lengthChange": false,//每页显示数据条数能否修改，默认true
            "pageLength": 15,//每页显示数据个数
            "searching": false,//本地搜索默认true
            "serverSide": true,
            "columns":[
                {"data":"name"},
                {"data":"nameCode"}
            ],
            language: {//代替表下方的英文页码说明
                "sProcessing": "处理中...",
                "sLengthMenu": "每页 _MENU_ 项",
                "sZeroRecords": "没有匹配结果",
                "sInfo": "当前显示第 _START_ 至 _END_ 项，共 _TOTAL_ 项。",
                "sInfoEmpty": "当前显示第 0 至 0 项，共 0 项",
                "sInfoFiltered": "(由 _MAX_ 项结果过滤)",
                "sInfoPostFix": "",
                "sSearch": "搜索:",
                "sUrl": "",
                "sEmptyTable": "表中数据为空",
                "sLoadingRecords": "载入中...",
                "sInfoThousands": ",",
                "oPaginate": {
                    "sFirst": "首页",
                    "sPrevious": "上页",
                    "sNext": "下页",
                    "sLast": "末页",
                    "sJump": "跳转"
                }
            }
        });
        function search(){
            var name=$("#nameSearch").val();
            var param={
"name":name//（参数名，参数值）在参数处理中，参数名和Controller中一样就可以了，做对象处理参数，参数名必须为实体类的属性名
            };
            oTable.settings()[0].ajax.data=param;
            oTable.ajax.reload();
        }

        $("#serchbtn").click(
            function () {
                search();
            }
        );
    });

后台有两种接收方式：
一，，直接接收传递过来的参数
Controller控制器阶段

@RequestMapping(value = "queryTest",method = RequestMethod.POST)
public Map query(@RequestParam(required=false)String name){

Map param=new HashMap();
List list=  SearchService.search(name);
int i=list.size();
System.out.println(i);
param.put("draw",1);
param.put("data",list);
param.put("recordsTotal",i);
param.put("recordsFiltered",i);
return param;
}
service阶段

public static  List queryByHql(String name) {

    List list=new ArrayList();
    String hql="from User where 1=1 [WHERE]";
    String where="";

    if(!(StringUtil.isEmpty(name)){
       where+=" and name = :name1";
       param.put("name1",name);
    }
   if(where.length()>0){
      hql=hql.replace("[WHERE]",where);
   }else{
      hql=hql.replace("[WHERE]",where);
   }

   Session session = null;
    try
    {
        session = getSession();
        Query query = session.createQuery(hql);

        Iterator iterator = param.keySet().iterator();
        while(iterator.hasNext()) {
            String key = iterator.next().toString();
            Object value = param.get(key);
            //String[]
            if(value != null && "[Ljava.lang.String;".equals(value.getClass().getName())) {
                query.setParameterList(key, (String[])value);
            }
            else {
                query.setParameter(key, value);
            }
        }
        list=query.list();
    }
    catch (Exception ex) {
        logger.error(ex.toString());
        logger.error("hql: {}", hql);
        ex.printStackTrace();
    }
    finally {
        closeSession(session);
    }
    return list;
}
这是参数处理的第一种方式，将参数直接传递到后台后台也直接处理参数，但是缺点是当参数过多时传递的参数多造成代码的雍余，这时引入第二种接受参数的方式，以一个对象接收参数

第二种处理参数的方式
Controller控制器阶段

@RequestMapping(value = "queryTest",method = RequestMethod.POST)
public Map query(User user){

Map param=new HashMap();
List list=  SearchService.search(user);
int i=list.size();
System.out.println(i);
param.put("draw",1);
param.put("data",list);
param.put("recordsTotal",i);
param.put("recordsFiltered",i);
return param;
}
service阶段

public static  List queryByHql(User user) {

    List list=new ArrayList();
    String hql="from User where 1=1 [WHERE]";
    String where="";

    if(!(StringUtil.isEmpty(user.getName())){
       where+=" and name = :name";
       param.put("name",user.getName);
    }
   if(where.length()>0){
      hql=hql.replace("[WHERE]",where);
   }else{
      hql=hql.replace("[WHERE]",where);
   }

   Session session = null;
    try
    {
        session = getSession();
        Query query = session.createQuery(hql);

        Iterator iterator = param.keySet().iterator();
        while(iterator.hasNext()) {
            String key = iterator.next().toString();
            Object value = param.get(key);
            //String[]
            if(value != null && "[Ljava.lang.String;".equals(value.getClass().getName())) {
                query.setParameterList(key, (String[])value);
            }
            else {
                query.setParameter(key, value);
            }
        }
        list=query.list();
    }
    catch (Exception ex) {
        logger.error(ex.toString());
        logger.error("hql: {}", hql);
        ex.printStackTrace();
    }
    finally {
        closeSession(session);
    }
    return list;
}

转载于:https://www.cnblogs.com/baijingting/p/9464897.html