jQuery条件分页 代替离线查询（附代码）

import javax.persistence.criteria.criteriabuilder;
import javax.persistence.criteria.criteriaquery;
import javax.persistence.criteria.join;
import javax.persistence.criteria.predicate;
import javax.persistence.criteria.root;

import net.sf.json.jsonobject;
import net.sf.json.jsonconfig;

 @action("courieraction_pagequery")
 public string pagequery() throws exception {
  pageable pageable = new pagerequest(page-1, rows);
  final string couriernum = model.getcouriernum();
  final string company = model.getcompany();
  final string type = model.gettype();
  final standard standard = model.getstandard();
  
  //相当于detchedcriteria对象.通过specification封装过滤条件
  specification<courier> specification = new specification<courier>() {
   
   @override
   public predicate topredicate(root<courier> root, criteriaquery<?> query, criteriabuilder cb) {
    //root：根实体 query：排序，封装条件 criteriabuilder：predicate断言工厂，产生predicate对象
    //添加过滤条件:添加快递员编号条件
    //p1:实体中属性 p2:条件
    list<predicate> list = new arraylist<>();
    if(stringutils.isnotblank(couriernum)){
     predicate p1 = cb.equal(root.get("couriernum").as(string.class), couriernum);
     list.add(p1);
    }
    if(stringutils.isnotblank(company)){
     predicate p2 = cb.equal(root.get("company").as(string.class), company);
     list.add(p2);
    }
    if(stringutils.isnotblank(type)){
     predicate p3 = cb.equal(root.get("type").as(string.class), type);
     list.add(p3);
    }
    //sql : select * from t_courier t inner join t_standard s on t.c_standard_id = s.c_id
//    where s.c_name = '标准一（100公斤）';
    //jpql: from courier c inner join c.standard s where s.name = "";
    if(standard!=null && stringutils.isnotblank(standard.getname())){
     //返回关联对象
     join<object, object> join = root.join("standard");
     predicate p4 = cb.equal(join.get("name").as(string.class), standard.getname());
     list.add(p4);
    }
    if(list.size()==0){
     return null;
    }
    //list集合转为数组
    predicate[] restrictions = new predicate[list.size()];
    restrictions = list.toarray(restrictions);
    return cb.and(restrictions);
   }
  };
  page<courier> page = courierservice.findall(specification, pageable);
  
  map<string, object> map = new hashmap<>();
  map.put("total", page.gettotalelements());
  map.put("rows", page.getcontent());
  
  //将fixedares集合属性排除掉，不转json
  jsonconfig jsonconfig = new jsonconfig();
  jsonconfig.setexcludes(new string[]{"fixedareas"});
  
  string json = jsonobject.fromobject(map, jsonconfig).tostring();
  
  servletactioncontext.getresponse().setcontenttype("text/json;charset=utf-8");
  servletactioncontext.getresponse().getwriter().write(json);
  return none;
 }
dao:
public interface courierdao extends jparepository<courier, integer>, jpaspecificationexecutor<courier> {

}

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