java - 插入数据库时​​准备好的语句中出现语法错误

Question

您好，我正在尝试使用准备好的语句将数据插入数据库，但出现语法错误，您可以帮忙吗

public boolean SignUp(String last_name, String first_name,String email, String password,String confirm_password,String phone){



        Connect connect = new Connect();
        Connection conn = connect.Connection();

        java.sql.PreparedStatement preparedStatement = null;
        //NULL is the column for auto increment
        String insertQuery = "INSERT INTO users VALUES (NULL, ?, ?, ?, ?, ?, ?)";
        preparedStatement = conn.prepareStatement(insertQuery);
        preparedStatement.setString(1, last_name);
        preparedStatement.setString(2, first_name);
        preparedStatement.setString(3, email);
        preparedStatement.setString(4, password);
        preparedStatement.setString(5, confirm_password);
        preparedStatement.setString(6, phone);

        int rs = preparedStatement.executeUpdate(insertQuery);

        conn.close();

}

这是错误消息

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?, ?, ?, ?, ?, ?)' at line 1

Answer 1

我找到了答案:)

使用preparedStatement.execute()而不是executeUpdate(sql)。您已经设置了 sql 和参数 -executeUpdate(sql) 中的新设置将覆盖绑定(bind)。