登陆账号后，用户更改自己的登陆密码和个人信息的java和mysql代码

以下是Java代码示例：

更改密码：

public void updatePassword(String userId, String newPassword) {
    Connection conn = null;
    PreparedStatement ps = null;
    try {
        conn = getConnection();
        String sql = "UPDATE user SET password = ? WHERE id = ?";
        ps = conn.prepareStatement(sql);
        ps.setString(1, newPassword);
        ps.setString(2, userId);
        ps.executeUpdate();
    } catch (SQLException e) {
        e.printStackTrace();
    } finally {
        close(conn, ps, null);
    }
}

更新个人信息：

public void updateUserInfo(String userId, String newName, int newAge) {
    Connection conn = null;
    PreparedStatement ps = null;
    try {
        conn = getConnection();
        String sql = "UPDATE user SET name = ?, age = ? WHERE id = ?";
        ps = conn.prepareStatement(sql);
        ps.setString(1, newName);
        ps.setInt(2, newAge);
        ps.setString(3, userId);
        ps.executeUpdate();
    } catch (SQLException e) {
        e.printStackTrace();
    } finally {
        close(conn, ps, null);
    }
}

以下是MySQL代码示例：

更改密码：

UPDATE user SET password = 'newPassword' WHERE id = 'userId';

更新个人信息：

UPDATE user SET name = 'newName', age = 'newAge' WHERE id = 'userId';