MySQL存儲過程分頁兼返回總頁數

因為MySQL目前不支持動態參數分頁所以存儲過程中要么傳sql語句過去要么自己寫個字符串連接方法

下為第二種方法

把每個需要分割的地方單寫一行，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 
或者寫成一行，效率高但是更容易寫錯

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();}      } 

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