用Java更新MySQL表

我已经更新了代码，现在唯一的错误是语法错误，我不确定如何解决：

    JButton addButton = new JButton("Add");
    addButton.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent e)
        {
            try 
            {
                st = con.createStatement();     
                String searchQuery = "INSERT INTO user (user_id, genre_id, hair_length, " + "user_fname, user_lname, user_age, user_gender) " + "VALUES (?, ?, ?, ?, ?, ?, ?)"; 
               (PreparedStatement insert = con.prepareStatement(searchQuery))
               {         
                   insert.setString(1, userText.getText());
                   insert.setString(2, genreText.getText());
                   innsert.setString(3, hairText.getText());
                   insert.setString(4, firstText.getText());
                   insert.setString(6, ageText.getText());
                   insert.setString(7, genderText.getText());
                   insert.executeUpdate(searchQuery);
               }
        JOptionPane.showMessageDialog(null, "Data Added To MySQL");             
                }
            catch (SQLException e1)
            {
                e1.printStackTrace();
            }   
        }
    });

---

为了避免任何语法错误，如案例或SQL注入，您必须使用PreparedStatement，例如：

String searchQuery = "INSERT INTO `user`(`user_id`, `genre_id`, `hair_length`, "
            + "`user_fname`,`user_lname`,`user_age`,`user_gender`) "
            + "VALUES (?, ?, ?, ?, ?, ?, ?)";

try (PreparedStatement insert = con.prepareStatement(searchQuery)) {
    insert.setString(1, userText.getText());
    insert.setString(2, genreText.getText());
    ...
    insert.executeUpdate();
    JOptionPane.showMessageDialog(null, "Data Added To MySQL");
}

---

查询中缺少

”

：

+ "', '" + hairText.getText() + "','" +
//----^--------------------------^

以及：

---

编辑

好的，如果您的代码中有一个小问题，请改用以下方法：

JButton addButton = new JButton("Add");
addButton.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {
        String searchQuery = "INSERT INTO `user`(`user_id`, `genre_id`, `hair_length`, "
                + "`user_fname`,`user_lname`,`user_age`,`user_gender`) "
                + "VALUES (?, ?, ?, ?, ?, ?, ?)";

        try (PreparedStatement insert = con.prepareStatement(searchQuery)) {
            insert.setString(1, userText.getText());
            insert.setString(2, genreText.getText());
            insert.setString(3, hairText.getText());
            insert.setString(4, firstText.getText());
            insert.setString(5, surText.getText());
            insert.setString(6, ageText.getText());
            insert.setString(7, genderText.getText());
            insert.executeUpdate(searchQuery);
            JOptionPane.showMessageDialog(null, "Data Added To MySQL");
        }catch(Exception ex){
            ex.printStackTrace();
        }
    }
});

---

你的gui课程在哪里？粘贴相关代码？确切的错误是什么？编译器在哪一行抱怨相同的问题？好的，这样效果更好，谢谢！我现在遇到的唯一语法错误是：String searchQuery=“INSERT INTO

user

（

user\u id

，

genre\u id

，

hair\u length

，

user\u fname

，

user\u lname

，

user\u gender

）值（？，，，，，，，，，，，，，，，，，，？）”；令牌“；”上出现语法错误，应在此之后重试token@NeilDavies您的查询应该如下所示：

String searchQuery=“INSERT INTO

user

（

user\u id

，

genre\u id

，

hair\u length

，“+”

user\u lname

，

user\u age

，

user\u gender

）”+“值（？，，，，，，，，，，？）”这就是我编写它的方式，但是在查询的末尾，我仍然会遇到一个语法错误；令牌“；”上出现语法错误，请在此令牌字符串后重试searchQuery=“插入用户（用户id、类型id、头发长度，“+”用户名称、用户名称、用户年龄、用户性别）”+”值（？，，，，，，，，，，，，，？）；我对堆栈溢出比较陌生，所以还没有访问聊天的权限
JButton addButton = new JButton("Add");
addButton.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {
        String searchQuery = "INSERT INTO `user`(`user_id`, `genre_id`, `hair_length`, "
                + "`user_fname`,`user_lname`,`user_age`,`user_gender`) "
                + "VALUES (?, ?, ?, ?, ?, ?, ?)";

        try (PreparedStatement insert = con.prepareStatement(searchQuery)) {
            insert.setString(1, userText.getText());
            insert.setString(2, genreText.getText());
            insert.setString(3, hairText.getText());
            insert.setString(4, firstText.getText());
            insert.setString(5, surText.getText());
            insert.setString(6, ageText.getText());
            insert.setString(7, genderText.getText());
            insert.executeUpdate(searchQuery);
            JOptionPane.showMessageDialog(null, "Data Added To MySQL");
        }catch(Exception ex){
            ex.printStackTrace();
        }
    }
});