oracle存储过程中进行分页

create or replace procedure APP_BUSSINESS_CARD_LIST(p_in_str  in varchar2,p_out_str out varchar2) is
 /*******************************************************************************
　　out varchar2我本地oracle显示最长不能超过2000个字符
  -- 函数名称  APP_BUSSINESS_CARD_LIST
  -- 功能描述  商通卡列表
  -- 2019年8月7日10:40:09
  ********************************************************************************/
-- Private exception declarations
  scanner_exception exception;
  pragma exception_init(scanner_exception, -20100);

  parser_exception exception;
  pragma exception_init(parser_exception, -20101);

  -- Private variable declarations
 -- 变量定义最长长度为4000（和oracle版本有关系，可以用str :=rpad("*",4000,"*")；
DBMS_OUTPUT.put_line('str: ' ||length(str));
进行测试）
  type card_no_tab is table of varchar2(4000) index by BINARY_INTEGER;
  v_card_no_tab_info card_no_tab;
  v_single_info      varchar2(4000);-- 存放整个分页list
  j_param            json;
  iCount             number;
  vv_count           number;
  v_count            number;
  v_user_id          number;
  v_page             number;
  v_page_size        number;
  v_total_count      number;
  v_total_page       number;
  v_begin_rownum     number;
  v_end_rownum       number;
  jl_card            json_list;-- 返回结果的list集合
  j_return           json;
  v_ret varchar2(2); 
  v_des varchar2(32);
 
   
begin
 
  -- 创建json对象
  j_param := json(p_in_str);
  -- 获取用户ID
  v_user_id   := json_ext.get_number(j_param, 'userId');
  -- 获取页码
  v_page := json_ext.get_number(j_param, 'page');
  if (v_page is null) then
    p_out_str := '{"resultCode":"31", "resultMsg":"page类型错误"}';
    return;
  end if;
   -- 校验页码数据是否有效(页码不能小于1)
  if (v_page < 1) then
    p_out_str := '{"resultCode":"36", "resultMsg":"page数据无效"}';
    return;
  end if;
  -- 获取页大小
  v_page_size := json_ext.get_number(j_param, 'pageSize');
  if (v_page_size is null) then
    p_out_str := '{"resultCode":"31", "resultMsg":"pageSize类型错误"}';
    return;
  end if;
  -- 校验页大小数据是否有效(页大小不能小于1并且不能大于7,可能会超出out长度)
  if (v_page_size < 1 or v_page_size > 7) then
    p_out_str := '{"resultCode":"38", "resultMsg":"pageSize数据无效"}';
    return;
  end if;
  -- 校验用户ID是否存在
  select count(1)
    into v_count
    from web_user_info
   where user_id = v_user_id;
  if (v_count <> 1) then
    p_out_str := '{"resultCode":"32", "resultMsg":"userId数据无效"}';
    return;
  end if;
  -- 获取卡列表总数量
   select count(1) into v_total_count from web_user_bussiness_card_view where userid = v_user_id;
   -- 计算总页数
  if (mod(v_total_count, v_page_size) = 0) then
    v_total_page := trunc(v_total_count / v_page_size);
  else
    v_total_page := trunc(v_total_count / v_page_size) + 1;
  end if; 
  -- 如果总页数是0, 则直接返回结果; 否则查询交易记录并返回结果.
  if (v_total_page = 0) then
    -- 返回的josn数据
    j_return := json('{"resultCode":"00", "resultMsg":"成功"}');
    j_return.put('page', v_page);
    j_return.put('pageSize', v_page_size);
    j_return.put('totalPage', v_total_page);
    j_return.put('totalCount', v_total_count);
    j_return.put('cardList', jl_card);
    
     
    -- 返回结果
    p_out_str := j_return.to_char(false);
    return;
  end if; 
  -- 如果当前页数大于总页数, 那么当前页数赋值为总页数.
  if (v_page > v_total_page) then
    v_page := v_total_page;
  end if;

  -- 计算开始行数和结束行数
  v_begin_rownum := (v_page - 1) * v_page_size;
  v_end_rownum   := v_begin_rownum + v_page_size;
  iCount   := 0;
  vv_count := 0;
   for r in (select * from web_user_bussiness_card_view where userid = v_user_id order by ismain desc,
    bindId asc) loop 
     -- 修改条数限制位置
    iCount := iCount + 1;
    if iCount <= v_begin_rownum then
      --当不是我们需要的那页的数据，则取下一条数据
     continue ;
    elsif iCount > v_end_rownum then
      exit;
    else
      null;
    end if;
    vv_count := vv_count + 1;
    v_card_no_tab_info(vv_count) := '{"cardNo":"' || r.cardNo ||
                                    '","background":"' ||r.background ||
                                    '","publicType":' ||  r.publicType ||
                                    ',"cardAreaType":"' || r.cardAreaType ||
                                    '","isInMainCard":' || r.isInMainCard ||
                                    ',"isSetMainCard":"' || r.isSetMainCard ||
                                    '","isTrade":"' || r.isTrade ||    
                                     '","isSend":"' || r.isSend || 
                                      '","facePrice":"' || r.facePrice ||  
                                       '","isActive":"' || r.isActive || 
                                      '","isMain":"' || r.isMain ||                            
                                    '"}';
  end loop;
  --组合jl_card
  -- "cardList":"
  v_single_info := '"cardList":[';
 
  for k in 1 .. vv_count loop
    if k < vv_count then
      v_single_info := v_single_info || v_card_no_tab_info(k) || ',';
    else
      v_single_info := v_single_info || v_card_no_tab_info(k);
    end if;
  end loop;
  v_single_info := v_single_info || ']'; 
   v_ret :='00'; 
   v_des :='成功';
    DBMS_OUTPUT.put_line('v_single_info : ' || LENGTH(v_single_info)); 
  p_out_str := '{"resultCode":"' || v_ret ||
                '", "resultMsg":"' || v_des || 
                '","page":"' || v_page ||
               '","pageSize":"' || v_page_size || 
               '","totalPage":"' ||v_total_page ||
               '","totalCount":"' ||v_total_count ||
               '",' || v_single_info || '}'; 
               
               
 return;
exception
  when scanner_exception then
    p_out_str := '{"resultCode":"94", "resultMsg":"Json扫描器异常"}';
  when parser_exception then
    p_out_str := '{"resultCode":"95", "resultMsg":"Json解析器异常"}';
  when others then
      DBMS_OUTPUT.put_line('sqlcode : ' ||sqlcode);
      DBMS_OUTPUT.put_line('sqlerrm : ' ||sqlerrm);
    p_out_str := '{"resultCode":"96", "resultMsg":"运行时异常"}';
end APP_BUSSINESS_CARD_LIST;

 另外一种分页方法：

 -- SQL语句
    v_sqltext := 'select tradeMonth  as "tradeMonth",
                         debitAmount as "debitAmount",
                         loanAmount  as "loanAmount"
                    from (select d.*, rownum as rn
                            from (select to_char(tradedate, ''yyyy.mm'') as tradeMonth,
                                         sum(debitamount) as debitAmount,
                                         sum(loanamount) as loanAmount
                                    from xsh_trade_view
                                   where cardno = ''' || v_card_no || '''
                                   group by to_char(tradedate, ''yyyy.mm'')
                                   order by to_char(tradedate, ''yyyy.mm'') desc) d
                           where rownum <= ' || v_end_rownum || ')
                   where rn > ' || v_begin_rownum;
  end if;

  -- 执行SQL语句并返回josn_list数据
  jl_trade := json_dyn.executeList(v_sqltext);