SQL数据库错误（Java DB）

基本上我有两个类，我试图使用INSERT INTO sql语句向数据库添加一个新条目。问题是，当我按下应该发送新条目的按钮时，它会向我显示SQL，它看起来很好，但抛出一个语法错误

“分配的值的数量与指定或隐含列的数量不同：”

我很困惑，因为数据库中有7列，SQL语句插入了7个值，所以我不知道该怎么做。任何帮助都会很好

调用执行SQL的类的类的函数：

public void actionPerformed(ActionEvent e)
 {
    if (e.getSource() == SendMessage) { 



        String subject = (SubjectTxt.getText());
        String readID = (ID.getText()); 
        String recipient = (Recipient.getText());
        String message = (Message.getText());
        int priority = 1;
        String sender = "pj439@gre.ac.uk";
        String label = "Todo";

       //MessageData.setSubject(readID, subject);
       //MessageData.setRecipient(readID, recipient);
       //MessageData.setMessage(readID, message);
       //MessageData.setPriority(readID, 1);

        MessageData.setMessage2(readID, priority, sender , label, subject, message, recipient);

    } else if (e.getSource() == close) { 
        dispose();
    }
 }

static void setMessage2(String id, int priority, String sender, String label, String subject, String message, String recipient) {


    String updateStr = "INSERT into STUDENT.MESSAGES values '" + id + "' ,'" + 1 + "' , '" +  sender + "' , '" + label + "' , '" + subject + "' , '" + message + "' , '" + recipient + "'";
    System.out.println(updateStr);
    try {
        stmt.executeUpdate(updateStr);
    } catch (Exception e) {
        System.out.println(e);
    }
}

INSERT into STUDENT.MESSAGES values '07' ,'1' , 'pj439@gre.ac.uk' , 'Todo' , 'Work' , 'Hello ' , 'pj439@gre.ac.uk'

包含SQL的函数：

public void actionPerformed(ActionEvent e)
 {
    if (e.getSource() == SendMessage) { 



        String subject = (SubjectTxt.getText());
        String readID = (ID.getText()); 
        String recipient = (Recipient.getText());
        String message = (Message.getText());
        int priority = 1;
        String sender = "pj439@gre.ac.uk";
        String label = "Todo";

       //MessageData.setSubject(readID, subject);
       //MessageData.setRecipient(readID, recipient);
       //MessageData.setMessage(readID, message);
       //MessageData.setPriority(readID, 1);

        MessageData.setMessage2(readID, priority, sender , label, subject, message, recipient);

    } else if (e.getSource() == close) { 
        dispose();
    }
 }

static void setMessage2(String id, int priority, String sender, String label, String subject, String message, String recipient) {


    String updateStr = "INSERT into STUDENT.MESSAGES values '" + id + "' ,'" + 1 + "' , '" +  sender + "' , '" + label + "' , '" + subject + "' , '" + message + "' , '" + recipient + "'";
    System.out.println(updateStr);
    try {
        stmt.executeUpdate(updateStr);
    } catch (Exception e) {
        System.out.println(e);
    }
}

INSERT into STUDENT.MESSAGES values '07' ,'1' , 'pj439@gre.ac.uk' , 'Todo' , 'Work' , 'Hello ' , 'pj439@gre.ac.uk'

在输出框中运行的SQL:

public void actionPerformed(ActionEvent e)
 {
    if (e.getSource() == SendMessage) { 



        String subject = (SubjectTxt.getText());
        String readID = (ID.getText()); 
        String recipient = (Recipient.getText());
        String message = (Message.getText());
        int priority = 1;
        String sender = "pj439@gre.ac.uk";
        String label = "Todo";

       //MessageData.setSubject(readID, subject);
       //MessageData.setRecipient(readID, recipient);
       //MessageData.setMessage(readID, message);
       //MessageData.setPriority(readID, 1);

        MessageData.setMessage2(readID, priority, sender , label, subject, message, recipient);

    } else if (e.getSource() == close) { 
        dispose();
    }
 }

static void setMessage2(String id, int priority, String sender, String label, String subject, String message, String recipient) {


    String updateStr = "INSERT into STUDENT.MESSAGES values '" + id + "' ,'" + 1 + "' , '" +  sender + "' , '" + label + "' , '" + subject + "' , '" + message + "' , '" + recipient + "'";
    System.out.println(updateStr);
    try {
        stmt.executeUpdate(updateStr);
    } catch (Exception e) {
        System.out.println(e);
    }
}

INSERT into STUDENT.MESSAGES values '07' ,'1' , 'pj439@gre.ac.uk' , 'Todo' , 'Work' , 'Hello ' , 'pj439@gre.ac.uk'

我的7张表格用于电子邮件客户端： -身份证 -优先权 -寄件人 -标签 -主题 -信息

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-收件人

永远不要将变量嵌入SQL语句中。请在查询中使用参数来执行此操作。您需要在值周围使用括号，

…value（…）

使用准备好的语句。它更安全，可读性更强。