Question

我想使用Java将图像保存到我的sql服务器数据库中。我正在使用NetBeans IDE，选择图片并单击“保存”按钮时，我的数据库字段（图片）显示了NULL的值。这些是我的代码：

    Connection conn = null;
    PreparedStatement ps = null;

    String url = "jdbc:sqlserver://localhost:1433;databaseName=test";


    try {
        Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
    } catch (ClassNotFoundException ex) {
        Logger.getLogger(JFrameMain.class.getName()).log(Level.SEVERE, null, ex);
    }


    try {
        conn = DriverManager.getConnection(url, "sa", "oraclee");
    } catch (SQLException ex) {
        Logger.getLogger(JFrameMain.class.getName()).log(Level.SEVERE, null, ex);
    }

       try {
        ps = conn.prepareStatement(" INSERT INTO imageTable (photo) values (?)");
    } catch (SQLException ex) {
        Logger.getLogger(JFrameMain.class.getName()).log(Level.SEVERE, null, ex);
    }

    try {
        ps.setBytes(1, photo);
    } catch (SQLException ex) {
        Logger.getLogger(JFrameMain.class.getName()).log(Level.SEVERE, null, ex);
    }
    try {
        ps.executeUpdate();
        JOptionPane.showMessageDialog(null, "done..!!");
        } catch (SQLException ex) {
        JOptionPane.showMessageDialog(null, "sorry, n't saved");
    }

Answer 1

完成.. !!!

错误在“保存”按钮代码中这些是最终的代码：

  String name = jTextField1.getText();
    try {
        Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
    } catch (ClassNotFoundException ex) {
        Logger.getLogger(testJFrame.class.getName()).log(Level.SEVERE, null, ex);
    }

    try {
        Connection conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=test", "sa", "oraclee");
        String url = "INSERT INTO imageTable (name,photo) VALUES (?,?)";
        PreparedStatement ps = conn.prepareStatement(url);
        ps.setString(1, name);
        ps.setBytes(2, personImage);
        ps.executeUpdate();
        JOptionPane.showMessageDialog(null, "saved");
    } catch (SQLException ex) {
        JOptionPane.showMessageDialog(null, "n't saved");
    }

但是，首先，我们应该在程序的开头添加此行，以定义 personImage ：

public class testJFrame extends javax.swing.JFrame {

byte[] personImage = null;

如何将图像添加到我的SQL Server数据库

1 个答案: