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java - 如何将图像获取到数据库，并将其设置为表中特定行的 "tooltipText()"

转载 作者：行者123 更新时间：2023-12-01 07:27:17 27 4
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我正在创建一个程序，上面有一个 JTable，由我的数据库数据填充。每行都有一个相应的图片，所以我想要发生的是，当我将鼠标光标放在该行上时，它将弹出一个包含其图片的工具提示文本，

 tblListOfInmates = new JTable(){                       
                private static final long serialVersionUID = 8240878564742150750L;
                public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
                        Component c = super.prepareRenderer(renderer, row, column);                     
                        if (c instanceof JComponent)  {
                            try{
                                    JComponent jc = (JComponent) c;    

                                    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");                                                                          
                                    con = DriverManager.getConnection("jdbc:odbc:RIM");
                                    st = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);

                                    String x = tblListOfInmates.getModel().getValueAt(row, 6).toString();
                                    String sql = "select * from records where ID ='"+x+"'";
                                    rs = st.executeQuery(sql);
                                    java.net.URL url = new File(rs.getString("ID")).toURI().toURL();





                                     final String html = "<html><body>" + "<img src='"+ url + "' width=160 height=120> ";

                                    jc.setToolTipText(html + "<br/>"
                                            + getValueAt(row, column).toString()
                                            + ":  row, col (" + row + ", " + column + ")");                                     
                            }catch(Exception e){e.printStackTrace();}
                        }
                        return c;
                    }
            };

我收到这个错误。 

 at RecordManagementSystem.MainFrame$18.prepareRenderer(MainFrame.java:860)
at javax.swing.plaf.basic.BasicTableUI.paintCell(Unknown Source)
at javax.swing.plaf.basic.BasicTableUI.paintCells(Unknown Source)
at javax.swing.plaf.basic.BasicTableUI.paint(Unknown Source)
at javax.swing.plaf.ComponentUI.update(Unknown Source)
at javax.swing.JComponent.paintComponent(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JViewport.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JLayeredPane.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paintToOffscreen(Unknown Source)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
at javax.swing.RepaintManager.paint(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
at java.awt.Container.paint(Unknown Source)
at java.awt.Window.paint(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.access$1100(Unknown Source)
at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

我不知道如何正确地做到这一点，我也不知道我的想法是否正确/良好。请告诉我您是否有比这更好的想法 =)

最佳答案

  • 每个按键和鼠标事件都会在 TableCellRenderer 内立即触发，然后由于冗长而繁重的 JDBC 任务会生成 RepaintManager 的异常，不要这样做，也不要打开 JDBC 连接，会生成一堆按键和鼠标事件，尤其是鼠标事件是针对每个像素的

  • 将所有图像作为 Icon/ImageIcon、事件加载到局部变量中。到 Icon/ImageIcon 数组，

关于java - 如何将图像获取到数据库，并将其设置为表中特定行的 "tooltipText()"，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22254404/

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