JDBC錯誤。幫我

-2

我面臨MySQL JDBC錯誤。

我執行了下面的代碼。

public void ReservationModifyQuery(String room, String name, String phone, String nop, String revdate, String revtime, String usetime, String isgroup, String id, String PrefRoom, String PrefReservationTime, String PrefDateString, Connection conn) throws Exception{ 

    String updateDB = "UPDATE reservation SET "; 
    String sql = "roomNum = ?,"+ 
        "Name = ? ,"+ 
        "Phone = ? ,"+ 
        "NumOfPeople = ? ,"+ 
        "ReservationDate = ? ,"+ 
        "ReservationTime = ? ,"+ 
        "UseTime = ? ,"+ 
        "Group = ? ,"+ 
        "ID = ? "; 

    sql = "roomNum = ?"; 
    String where = "where roomNum = ? and ReservationDate = ? and ReservationTime = ? ;"; 
    pstmt = conn.prepareStatement(updateDB+sql+where); 
    pstmt.setInt(1, Integer.parseInt(room)); 
    pstmt.setInt(2, Integer.parseInt(PrefRoom)); 
    pstmt.setDate(3, Date.valueOf(PrefDateString)); 
    pstmt.setTime(4, Time.valueOf(PrefReservationTime)); 
    pstmt.executeUpdate(); 

    sql = "Name = ?"; 
    pstmt = conn.prepareStatement(updateDB+sql+where); 
    pstmt.setString(1, name); 
    pstmt.setInt(2, Integer.parseInt(PrefRoom)); 
    pstmt.setDate(3, Date.valueOf(PrefDateString)); 
    pstmt.setTime(4, Time.valueOf(PrefReservationTime)); 
    pstmt.executeUpdate(); 

    sql = "Phone = ?"; 
    pstmt = conn.prepareStatement(updateDB+sql+where); 
    pstmt.setString(1, phone); 
    pstmt.setInt(2, Integer.parseInt(PrefRoom)); 
    pstmt.setDate(3, Date.valueOf(PrefDateString)); 
    pstmt.setTime(4, Time.valueOf(PrefReservationTime)); 
    pstmt.executeUpdate(); 

    sql = "NumOfPeople = ?"; 
    pstmt = conn.prepareStatement(updateDB+sql+where); 
    pstmt.setInt(1, Integer.parseInt(nop)); 
    pstmt.setInt(2, Integer.parseInt(PrefRoom)); 
    pstmt.setDate(3, Date.valueOf(PrefDateString)); 
    pstmt.setTime(4, Time.valueOf(PrefReservationTime)); 
    pstmt.executeUpdate(); 

    sql = "ReservationDate = ?"; 
    pstmt = conn.prepareStatement(updateDB+sql+where); 
    pstmt.setDate(1, Date.valueOf(revdate)); 
    pstmt.setInt(2, Integer.parseInt(PrefRoom)); 
    pstmt.setDate(3, Date.valueOf(PrefDateString)); 
    pstmt.setTime(4, Time.valueOf(PrefReservationTime)); 
    pstmt.executeUpdate(); 

    sql = "ReservationTime = ?"; 
    pstmt = conn.prepareStatement(updateDB+sql+where); 
    pstmt.setTime(1, Time.valueOf(revtime)); 
    pstmt.setInt(2, Integer.parseInt(PrefRoom)); 
    pstmt.setDate(3, Date.valueOf(PrefDateString)); 
    pstmt.setTime(4, Time.valueOf(PrefReservationTime)); 
    pstmt.executeUpdate(); 

    sql = "UseTime = ?"; 
    pstmt = conn.prepareStatement(updateDB+sql+where); 
    pstmt.setDouble(1, Double.parseDouble(usetime)); 
    pstmt.setInt(2, Integer.parseInt(PrefRoom)); 
    pstmt.setDate(3, Date.valueOf(PrefDateString)); 
    pstmt.setTime(4, Time.valueOf(PrefReservationTime)); 
    pstmt.executeUpdate(); 

    sql = "Group = ?"; 
    pstmt = conn.prepareStatement(updateDB+sql+where); 
    pstmt.setString(1, isgroup); 
    pstmt.setInt(2, Integer.parseInt(PrefRoom)); 
    pstmt.setDate(3, Date.valueOf(PrefDateString)); 
    pstmt.setTime(4, Time.valueOf(PrefReservationTime)); 
    pstmt.executeUpdate(); 

    sql = "ID = ?"; 
    pstmt = conn.prepareStatement(updateDB+sql+where); 
    pstmt.setString(1, id); 
    pstmt.setInt(2, Integer.parseInt(PrefRoom)); 
    pstmt.setDate(3, Date.valueOf(PrefDateString)); 
    pstmt.setTime(4, Time.valueOf(PrefReservationTime)); 
    pstmt.executeUpdate(); 


    pstmt.close(); 
    conn.close(); 
}

此代碼出現在下面的語法異常。但我不知道錯誤節...

我該如何解決這個問題？

來源

2017-03-03 S.J Lee

你讓兩個賦值在開始'sql'變量。這是你真正想做的嗎？ – Nurjan

請在你的問題中包含完整的stacktrace作爲** text **，不要將圖像用於可以通過文本傳遞的內容。順便說一句：這個問題可能是串聯後'''和'WHERE'之間的空白。 –

你的陳述之間沒有空格。在你的代碼中，準備好的語句的SQL是

UPDATE reservation SET roomNum=?,Name = ?,Phone = ? ,NumOfPeople = ? ,ReservationDate = ? ,ReservationTime = ? ,UseTime = ? ,Group = ? ,ID = ?where roomNum = ? and ReservationDate = ? and ReservationTime = ? ;

這是不正確的，因爲它們之間沒有空格？和哪裏。

我也從where語句中刪除了分號。使用的

String where = " where roomNum = ? and ReservationDate = ? and ReservationTime = ? ";

代替

String where = "where roomNum = ? and ReservationDate = ? and ReservationTime = ? ;";

來源

2017-03-06 22:54:18 Maverick

JDBC錯誤。幫我

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