java- 分頁-參數模型

--------controller-----------
@RequestMapping("/list")
public R list(@RequestParam Map<String, Object> params){
   //查詢列表數據
       Query query = new Query(params);

   List<ClientUserEntity> clientUserList = clientUserService.queryList(query);
   int total = clientUserService.queryTotal(query);
   
   PageUtils pageUtil = new PageUtils(clientUserList, total, query.getLimit(), query.getPage());
   
   return R.ok().put("page", pageUtil);
}

/**
 * 分頁工具類
 *
 */
public class PageUtils implements Serializable {
   //總記錄數
   private int totalCount;
   //每頁記錄數
   private int pageSize;
   //總頁數
   private int totalPage;
   //當前頁數
   private int currPage;
   //列表數據
   private List<?> list;

   /**
    * 分頁
    * @param list        列表數據
    * @param totalCount  總記錄數
    * @param pageSize    每頁記錄數
    * @param currPage    當前頁數
    */
   public PageUtils(List<?> list, int totalCount, int pageSize, int currPage) {
      this.list = list;
      this.totalCount = totalCount;
      this.pageSize = pageSize;
      this.currPage = currPage;
      this.totalPage = (int)Math.ceil((double)totalCount/pageSize);
   }

   public int getTotalCount() {
      return totalCount;
   }

   public void setTotalCount(int totalCount) {
      this.totalCount = totalCount;
   }

   public int getPageSize() {
      return pageSize;
   }

   public void setPageSize(int pageSize) {
      this.pageSize = pageSize;
   }

   public int getTotalPage() {
      return totalPage;
   }

   public void setTotalPage(int totalPage) {
      this.totalPage = totalPage;
   }

   public int getCurrPage() {
      return currPage;
   }

   public void setCurrPage(int currPage) {
      this.currPage = currPage;
   }

   public List<?> getList() {
      return list;
   }

   public void setList(List<?> list) {
      this.list = list;
   }

}

/** * 查詢參數 * */public class Query extends LinkedHashMap<String, Object> {   //當前頁碼    private int page;    //每頁條數    private int limit;    public Query(Map<String, Object> params){        this.putAll(params);        //分頁參數        this.page = Integer.parseInt(params.get("page").toString());        this.limit = Integer.parseInt(params.get("limit").toString());        this.put("offset", (page - 1) * limit);        this.put("page", page);        this.put("limit", limit);        //防止SQL注入（由於sidx、order是經過拼接SQL實現排序的，會有SQL注入風險）        String sidx = (String)params.get("sidx");        String order = (String)params.get("order");        if(StringUtils.isNotBlank(sidx)){            this.put("sidx", SQLFilter.sqlInject(sidx));        }        if(StringUtils.isNotBlank(order)){            this.put("order", SQLFilter.sqlInject(order));        }    }}