在SQL数据库中存储时间戳

Question

我在将值存储到在Netbeans中创建的sql数据库中遇到问题。

String bladeSerial;
String bladeType;
LocalTime startTime1;

private void startButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                             


    Connection conn = null; 
    Statement st = null;
try {
    conn = DriverManager.getConnection ("jdbc:derby://localhost:1527/db01", "Administrator", "admin"); //run procedure getConnection to connect to the database - see below
     st = conn.createStatement(); //set up a statement st to enable you to send SQL statements to the database.
} catch (SQLException ex) {
    Logger.getLogger(FormTwo1.class.getName()).log(Level.SEVERE, null, ex);
}


        System.out.println ("Successful Connection");


String query = "insert into TB01(SERIAL,BLADETYPE,STARTT1) values ('+bladeSerial+', '+itemText+', '+(String.valueOf(startTime1))+')";
try (PreparedStatement pstmt = conn.prepareStatement(query)) {
    pstmt.setString(1, bladeSerial);
    pstmt.setString(2, bladeType);
    pstmt.setString(3, String.valueOf(startTime1));
    pstmt.executeUpdate();
} catch (SQLException ex) {
    // Exception handling
    Logger.getLogger(FormTwo1.class.getName()).log(Level.SEVERE, null, ex);
}

startTime1变量以HH:mm:ss.SSS格式保存。 运行代码时，出现错误：

java.sql.SQLSyntaxErrorException：语法错误：在第1行第65列遇到“：”。

错误是指当时的冒号，但我不知道该如何解决。

SERIAL是VARCHAR(5) ， BLADETYPE是VARCHAR(80) ， STARTT1是VARCHAR(12) 。 所有列都在DATA表中。

Answer 1

请改用PreparedStatement ，然后使用set*方法设置参数：

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss.SSS");
String query = "insert into DATA(SERIAL,BLADETYPE,STARTT1) values (?, ?, ?)";
try (PreparedStatement pstmt = conn.prepateStatement(query)) {
    pstmt.setString(1, bladeSerial);
    pstmt.setString(2, bladeType);
    pstmt.setString(3, startTime1.format(formatter));
    pstmt.executeUpdate();
} catch (SQLException e) {
    // Exception handling
}