Java 如何将imagepath存储在数据库中并设置为按钮

我有一个GUI，它有文本字段和按钮。如果单击“下一步”按钮，光标应在数据库中导航，并将行值设置到我的文本字段中，并将路径放入“创建图像”按钮图标中。但它给了我这个错误

代码块：

if (event.getSource() == next) {
    try {   
        if (rs.next()) {    
            lastnameT.setText(rs.getString("lname"));
            firstnameT.setText(rs.getString("fname"));
            middlenameT.setText(rs.getString("mname"));
            aliasT.setText(rs.getString("alias"));
            sexT.setSelectedItem(rs.getString("sex"));
            ageT.setText(rs.getString("age"));
            civilstatusT.setSelectedItem(rs.getString("civilstatus"));
            addressT.setText(rs.getString("address"));
            religionT.setSelectedItem(rs.getString("religion"));
            monthT.setSelectedItem(rs.getString("m"));
            dayT.setSelectedItem(rs.getString("d"));
            yearT.setSelectedItem(rs.getString("y"));
            eaT.setSelectedItem(rs.getString("EA"));
            weightT.setText(rs.getString("weight"));;
            heightT.setText(rs.getString("height"));
            hairT.setSelectedItem(rs.getString("hair"));
            hairColorT.setSelectedItem(rs.getString("haircolor"));
            colorEyesT.setSelectedItem(rs.getString("colorofeyes"));
            complexionT.setSelectedItem(rs.getString("complexion"));
            gangT.setText(rs.getString("gang"));
            marksT.setText(rs.getString("marks"));
            preparedbyT.setText(rs.getString("preparedBy"));
            verifiedT.setText(rs.getString("verifiedBy"));

            //btnNewButton.putClientProperty(rs.getString("image"),rs.getString("image"));
            btnNewButton.setIcon(new ImageIcon(rs.getString("image")));
            //  save.setIcon(new ImageIcon(file.getPath()));
        }
        else {
            JOptionPane.showMessageDialog(null, "No more records");
        }
    }
    catch (Exception e) {
        JOptionPane.showMessageDialog(null,"Sa catch bumagsak");
        System.out.print(e);
    }
}

Uncaught error fetching image:
java.lang.NullPointerException
    at java.io.FileInputStream.<init>(Unknown Source)
    at java.io.FileInputStream.<init>(Unknown Source)
    at sun.awt.image.FileImageSource.getDecoder(Unknown Source)
    at sun.awt.image.InputStreamImageSource.doFetch(Unknown Source)
    at sun.awt.image.ImageFetcher.fetchloop(Unknown Source)
    at sun.awt.image.ImageFetcher.run(Unknown Source)

错误：

if (event.getSource() == next) {
    try {   
        if (rs.next()) {    
            lastnameT.setText(rs.getString("lname"));
            firstnameT.setText(rs.getString("fname"));
            middlenameT.setText(rs.getString("mname"));
            aliasT.setText(rs.getString("alias"));
            sexT.setSelectedItem(rs.getString("sex"));
            ageT.setText(rs.getString("age"));
            civilstatusT.setSelectedItem(rs.getString("civilstatus"));
            addressT.setText(rs.getString("address"));
            religionT.setSelectedItem(rs.getString("religion"));
            monthT.setSelectedItem(rs.getString("m"));
            dayT.setSelectedItem(rs.getString("d"));
            yearT.setSelectedItem(rs.getString("y"));
            eaT.setSelectedItem(rs.getString("EA"));
            weightT.setText(rs.getString("weight"));;
            heightT.setText(rs.getString("height"));
            hairT.setSelectedItem(rs.getString("hair"));
            hairColorT.setSelectedItem(rs.getString("haircolor"));
            colorEyesT.setSelectedItem(rs.getString("colorofeyes"));
            complexionT.setSelectedItem(rs.getString("complexion"));
            gangT.setText(rs.getString("gang"));
            marksT.setText(rs.getString("marks"));
            preparedbyT.setText(rs.getString("preparedBy"));
            verifiedT.setText(rs.getString("verifiedBy"));

            //btnNewButton.putClientProperty(rs.getString("image"),rs.getString("image"));
            btnNewButton.setIcon(new ImageIcon(rs.getString("image")));
            //  save.setIcon(new ImageIcon(file.getPath()));
        }
        else {
            JOptionPane.showMessageDialog(null, "No more records");
        }
    }
    catch (Exception e) {
        JOptionPane.showMessageDialog(null,"Sa catch bumagsak");
        System.out.print(e);
    }
}

Uncaught error fetching image:
java.lang.NullPointerException
    at java.io.FileInputStream.<init>(Unknown Source)
    at java.io.FileInputStream.<init>(Unknown Source)
    at sun.awt.image.FileImageSource.getDecoder(Unknown Source)
    at sun.awt.image.InputStreamImageSource.doFetch(Unknown Source)
    at sun.awt.image.ImageFetcher.fetchloop(Unknown Source)
    at sun.awt.image.ImageFetcher.run(Unknown Source)

获取图像时出现未捕获错误： java.lang.NullPointerException 位于java.io.FileInputStream。（未知源） 位于java.io.FileInputStream。（未知源） 位于sun.awt.image.FileImageSource.getDecoder（未知源） 在sun.awt.image.InputStreamImageSource.doFetch（未知源）处 位于sun.awt.image.ImageFetcher.fetchloop（未知源） 位于sun.awt.image.ImageFetcher.run（未知源）

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似乎

rs.getString（“image”）

正在返回文件的无效路径。您可以轻松地检查以下内容：

//btnNewButton.setIcon(new ImageIcon(rs.getString("image")));
System.out.println(rs.getString("image"));

一些提示 数据库调用是耗时的任务，可能会阻塞（又称EDT），导致GUI无响应。EDT是一个单独的特殊线程，Swing组件在其中创建和更新。为了避免阻塞，该线程考虑使用A在后台线程中执行数据库调用，并更新EDT中的Swing组件。更多信息请参阅

我建议你看看书中的提示。总结：

• 在域类中包装数据
• 使用SwingWorker在后台线程中执行数据库调用，并在EDT中更新Swing组件

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rs.getString（“图像”）的路径是什么？