MySQL存储过程分页兼返回总页数

因为MySQL目前不支持动态参数分页所以存储过程中要么传sql语句过去要么自己写个字符串连接方法

下为第二种方法

把每个需要分割的地方单写一行，清除

1.BEGIN 
-
 
1.SELECT CEIL(COUNT(*)/pageNum) INTO pageCount FROM mytestdb.mttest WHERE tt_id = arg_mt_id; 
1.SET @sqlStr = CONCAT('SELECT `mt_id`,`tt_id`,`tt_name` FROM `mytestdb`.`mttest` WHERE `tt_id` = '); 
1.SET @sqlStr = CONCAT(@sqlStr,arg_mt_id); 
1.SET @sqlStr = CONCAT(@sqlStr,' LIMIT ');SET @sqlStr = CONCAT(@sqlStr,((pageNum-1)*pageSize)); 
1.SET @sqlStr = CONCAT(@sqlStr,','); 
1.SET @sqlStr = CONCAT(@sqlStr,pageSize); 
1.SET @sqlStr = CONCAT(@sqlStr,';'); 
1.PREPARE s1 FROM @sqlStr; 
1.EXECUTE s1; 
1.DEALLOCATE PREPARE s1; 
1.END 
或者写成一行，效率高但是更容易写错

1.BEGIN 
1.SELECT CEIL(COUNT(*)/pageNum) INTO pageCount FROM mytestdb.mttest WHERE tt_id = arg_mt_id; 
1.SET @sqlStr = CONCAT('SELECT `mt_id`,`tt_id`,`tt_name` FROM `mytestdb`.`mttest` WHERE `tt_id` = ',arg_mt_id,' LIMIT ',
1.((pageNum-1)*pageSize),',',pageSize';'); 
1.PREPARE s1 FROM @sqlStr;EXECUTE s1;DEALLOCATE PREPARE s1;END 
java端

1.try {Connection conn = db.openDB(getServletContext());String sql = "{call `myPagingTest`(?,?,?,?)}";CallableStatement cs = conn.prepareCall(sql);cs.setInt(1, 1);cs.setInt(2, 1);cs.setInt(3, 5);cs.registerOutParameter(4, Types.INTEGER);rs = cs.executeQuery();System.out.println(cs.getInt(4));while(rs.next()){out.println(rs.getInt(1));              out.println(rs.getInt(2));              out.println(rs.getString(3) + "<br>");    }} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{          try {if(rs != null){rs.close();}if(db!=null){db.close();}} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}      } 

服务器租用/服务器托管中国五强！虚拟主机域名注册顶级提供商！15年品质保障！--亿恩科技[ENKJ.COM]