一、分页样例代码

    try (EntityManagerContainer emc = EntityManagerContainerFactory.instance().create()) {
       ActionResult result = new ActionResult<>();
       Wi wi = this.convertToWrapIn(jsonElement, Wi.class);
       List ids = new ArrayList<>();
       EntityManager em = emc.get(RecordReadLog.class);
       CriteriaBuilder cb = em.getCriteriaBuilder();
       CriteriaQuery cq = cb.createQuery(String.class);
       Root root = cq.from(RecordReadLog.class);
    Predicate p = cb.equal(root.get(RecordReadLog_.idRecord),wi.getIdRecord().trim());

        if(wi.getStartTime() != null) {
            p = cb.and(p, cb.greaterThanOrEqualTo(root.get(RecordReadLog_.createTime), wi.getStartTime()));
        }

         if(wi.getEndTime()!= null) {
               p = cb.and(p, cb.lessThanOrEqualTo(root.get(RecordReadLog_.createTime), wi.getEndTime()));
        }


        Order order;
        String  sortField = wi.getSortField();
        String  sortType = wi.getSortType();

        if(!StringUtils.isBlank(sortField)) {
            if(sortType.equalsIgnoreCase("asc")) {
                 order =  cb.asc(root.get(sortField));
            }else {
                 order =  cb.desc(root.get(sortField));
            }
        }else {
               order =  cb.desc(root.get("createTime"));
        }

        cq.select(root.get(RecordReadLog_.id)).where(p).orderBy(order);
        TypedQuery typedQuery = em.createQuery(cq);

         int pageIndex = (page-1)*size;
         int pageSize = size;
         typedQuery.setFirstResult(pageIndex);
         typedQuery.setMaxResults(pageSize);
         ids =  typedQuery.getResultList();

         TypedQuery tqCount = em.createQuery( cq.select(root.get(RecordReadLog_.id)).where(p));
         List allid = tqCount.getResultList();
         Long  tpsize =  (long) allid.size();

         CriteriaQuery cqRecord = cb.createQuery(RecordReadLog.class);        
         Predicate pRecord = cb.isMember(root.get(RecordReadLog_.id), cb.literal(ids));
         Root rootRecord = cqRecord.from(RecordReadLog.class);
         cqRecord.select(rootRecord).where(pRecord).orderBy(order);
         List os = em.createQuery(cqRecord).getResultList();

        List wos = Wo.copier.copy(os);

        result.setData(wos);
        result.setCount(tpsize);
        return result;
    }

二、过滤器url权限说明

Anonymous：匿名访问权限
Cipher：这个应该是服务器之间访问权限
Manager：管理员访问权限
User：普通用户放权权限

三、WI ,WO 说明

wi：接收接口输入参数对象
wo：接口返回参数对象

四、JPA

参考：https://www.w3cschool.cn/java/jpa-entitymanager.html

五、查找对应后台代码过程

1、http://服务器ip:20030/x_program_center/jest/list.html

2、点击打开具体模块的api界面：

3、查看代码具体路径：

4.eclipse里查看具体代码