我使用的代码可以让我以图形方式查看治疗结果。我想将图形存储在MySql数据库中(在WampServer中)。我怎么能这样做?
以下是我的尝试:
if (jCheckBox1.isSelected()) {
try {
con = getConnection("jdbc:mysql://localhost:3306/base_rapport_tt", "root", "");
Statement statement = con.createStatement(rs.TYPE_FORWARD_ONLY, rs.CONCUR_READ_ONLY);
String sql1 = "Select last_updated_by,(count(id_incident) )*100/(Select count(id_incident) from incident where Status like 'Closed' and open_time between '" + jTextField1.getText() + "' and '" + jTextField2.getText() + "')from incident where Status like 'Closed'and open_time between '" + jTextField1.getText() + "' and '" + jTextField2.getText() + "' group by last_updated_by";
rs1 = statement.executeQuery(sql1);
DefaultPieDataset pieDataset = new DefaultPieDataset();
while (rs1.next()) {
pieDataset.setValue(rs1.getString("last_updated_by"), rs1.getDouble(2));
}
JFreeChart chart = ChartFactory.createPieChart3D("Taux résolution par personne", pieDataset, true, true, false);
PiePlot3D piePlot3d = (PiePlot3D) chart.getPlot();
piePlot3d.setLabelGenerator(new StandardPieSectionLabelGenerator("{0}={1}"));
fenetre fen1 = new fenetre();
pnl = new JPanel(new BorderLayout());
fen1.setContentPane(pnl);
fen1.setVisible(true);
setSize(700, 700);
ChartPanel cPanel1 = new ChartPanel(chart);
pnl.add(cPanel1);
} catch (Exception e) {
JOptionPane.showMessageDialog(this, e);
}
}
答案 0 :(得分:2)
通常,是的,您可以使用BLOB类型在MySQL中存储任意二进制数据。示例模式:
CREATE TABLE images (
id INT PRIMARY KEY AUTO_INCREMENT,
description VARCHAR(40),
data BLOB
);
您似乎在后端使用Java,如果是这样,您应该查看Using Large Objects教程。
然而,有理由你可能不想这样做;有关此问题的讨论,请参阅Should I use MySQL blob field type?。