Question

我正在尝试创建桌面应用程序（scenebuilder），我想从DATABASE（SQLITE）检索Image的路径并将其附加到按钮以在ImageView中打开它但我在做的时候遇到了问题这一点。

注意：我正在尝试学习Java

我的代码

@FXML
private ImageView imageView;
 @FXML
 void btn10 (ActionEvent event) {


Connection c = null;
Statement stmt = null;
try {
    Class.forName("org.sqlite.JDBC");
    c = DriverManager.getConnection("jdbc:sqlite:sogeclair.sqlite");
    c.setAutoCommit(false);
    System.out.println("Opened database successfully");
    stmt = c.createStatement();

    String sql = "SELECT * FROM image WHERE rowid = 1" ;
    System.out.println(sql);
    ResultSet rs = stmt.executeQuery( sql );
    while ( rs.next() ) {

        String path=rs.getString("imaging");
        imageView.setImage(new Image(path));

        System.out.println();
    }
    rs.close();
    stmt.close();
    c.close();

    } catch ( Exception e ) {
        System.err.println( e.getClass().getName() + ": " + e.getMessage() );
        System.exit(0);
    }
    System.out.println("Operation done successfully");
}

我在结果中得到了这个

Opened database successfully
SELECT * FROM image WHERE rowid = 1
java.lang.IllegalArgumentException: Invalid URL: Invalid URL or resource not found
Deleting directory C:\Users\Lenovo\Documents\NetBeansProjects\sogece\dist\run538077077
jfxsa-run:
BUILD SUCCESSFUL (total time: 10 seconds)

和 MyDatabase

欢迎所有评论：请帮助我：D

Answer 1

这是我编写的程序中的代码，该程序从sqlite中检索图像blob。您可以从here下载并运行该程序。它正在运行，但它是一个不完整的程序。

在你的代码中，一旦你使用我的代码中的想法获得图像，那么只需使用该图像来设置你的ImageView。

        String sqlTCNote = "SELECT * FROM Company;";            
        try (Connection conn = DriverManager.getConnection("jdbc:sqlite:contactFX.db");
             Statement stmt = conn.createStatement(); 
             ResultSet rset = stmt.executeQuery(sqlTCNote)) 
        {
            while(rset.next())
            {                
                Company c1 = new Company();
                c1.setName(rset.getString("company_name"));
                c1.setShortName(rset.getString("short_name"));
                c1.setStreet(rset.getString("street"));
                c1.setCity(rset.getString("city"));
                c1.setState(rset.getString("state"));
                c1.setZip(rset.getString("zip"));
                c1.setPhoneNumber(rset.getString("phone_number"));
                c1.setTollFreeNumber(rset.getString("toll_free_number"));
                c1.setEmailAddress(rset.getString("email_address"));
                c1.setMissionStatement(rset.getString("mission_statement"));
                c1.setPersonalNote(rset.getString("personal_note"));
                c1.setWebSiteAddress(rset.getString("website_address"));  

                //This is the part you are interested in!
                InputStream input = rset.getBinaryStream("image");
                InputStreamReader inputReader = new InputStreamReader(input);                        
                if(inputReader.ready())
                {
                    File tempFile = new File("tempFile.jpg");

                    FileOutputStream fos = new FileOutputStream(tempFile);
                    byte[] buffer = new byte[1024];
                    while(input.read(buffer) > 0){
                        fos.write(buffer);                        
                    }
                    Image image = new Image(tempFile.toURI().toURL().toString());
                    c1.setImage(image);
                }
                for(int i = 0; i < 10; i++)
                {
                    c1.addEmployee(new Employee());
                }

                companyData.add(c1);
            }            
        }
        catch(SQLException ex)
        {
            Logger.getLogger(MainController.class.getName()).log(Level.SEVERE, null, ex);
        }
        catch (IOException ex)
        {
            Logger.getLogger(MainController.class.getName()).log(Level.SEVERE, null, ex);
        }

从SQLITE DB中检索图像并使用JFXbutton在imageView中打开它

1 个答案: