获取受影响的行

我试图让这个查询SELECT mac, stop_name from behaviour where mac = ?与使用executeQuery的受影响的记录数的数量。我怎样才能得到受影响的行数？获取受影响的行

代码：

if (behaviourExist.next()) { 
    PreparedStatement prepared = con 
      .prepareStatement("SELECT mac, stop_name from behaviour where mac = ?"); 
    prepared.setString(1, macD); 
    ResultSet rsBehav = prepared.executeQuery(); 
    ArrayList<String> stopNameList = new ArrayList<String>(); 
    while (rsBehav.next()) { 
     //int numberOfRows = rsBehav.getInt(1); 
     String stNa = rsBehav.getString("stop_name"); 
     if (stNa.equals(nameShortestDistance)) { 
      stopNameList.add(stNa); 

     } 

    } 
}

来源

2015-06-21 Mr Asker

http://www.coderanch.com/t/303346/JDBC/databases/find-number-rows-resultset – Pshemo

甲选择不具有数受影响的行（==添加，更新或删除）。 –

这是一个读操作，这样就不会影响任何行。如果你想获得行返回的数字，那么你可以做的一个低于

使用计数器变量，在环加一while (rsBehav.next())

使用可滚动的ResultSet

PreparedStatement prepared = con.prepareStatement(
     "SELECT mac, stop_name from behaviour where mac = ?", 
     ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY); 
ResultSet rsBehav = prepared.executeQuery(); 
rsBehav.afterLast(); 
int numRow = rsBehav.getRow(); 
rsBehav.beforeFirst();

这里numRow行会给你号或者返回行，

来源

2015-06-21 08:58:01 barunsthakur

if (behaviourExist.next()) { 
PreparedStatement prepared = con 
     .prepareStatement("SELECT mac, stop_name from behaviour where mac = ?"); 
prepared.setString(1, macD); 
ResultSet rsBehav = prepared.executeQuery(); 
ArrayList<String> stopNameList = new ArrayList<String>(); 
int numberOfRows = 0; 
while (rsBehav.next()) { 
    ++numberOfRows; 
    String stNa = rsBehav.getString("stop_name"); 
    if (stNa.equals(nameShortestDistance)) { 
     stopNameList.add(stNa); 

    } 
} 
}

这里变量numberOfRows会在每次循环运行时递增，这会给你结果集中的总行数。

来源

2015-06-21 08:58:37 swifty

PreparedStatement prepared = con 
     .prepareStatement(
     "SELECT (SELECT count(*) from where mac = ?)," 
     " mac, stop_name from behaviour where mac = ?"); 
prepared.setString(1, macD); 
prepared.setString(2, macD); 
ResultSet rsBehav = prepared.executeQuery(); 
ArrayList<String> stopNameList = new ArrayList<String>(); 
while (rsBehav.next()) { 
    int numberOfRows = rsBehav.getInt(1); 
    String stNa = rsBehav.getString("stop_name"); 
    // ....

来源

2015-06-21 09:06:08 saka1029

获取受影响的行

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