Java 使用Oracle数据库数据的Primefaces饼图

我第一次使用primefaces，我能够使用硬编码的数字显示饼图，如下所示：

import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import org.primefaces.model.chart.PieChartModel;

/**
 *
 * @author Stanley
 */
@ManagedBean(name = "chartBean")
@RequestScoped
public class ChartBean implements Serializable {

    private PieChartModel pieModel;

    public ChartBean() {
        createPieModel();
    }

    public PieChartModel getPieModel() {
        return pieModel;
    }

    private void createPieModel() {
        pieModel = new PieChartModel();
        pieModel.set("Branch1", 540);
        pieModel.set("Branch2", 325);
        pieModel.set("Branch3", 702);
        //Feed these values from the database dynamically
    }

}

我有一个查询，用于从数据库中动态提取所有分支的相同信息，如下所示：

select branch_code, count(*) accounts_opened from account_master where acct_opn_date
>= trunc(sysdate,'mm')
group by branch_code;

---

我的问题是如何使用数据库中的值在饼图上显示相同的信息？

您可以从oracle获取值，并从ResultSet设置值

像这样

Connection con = YOUR_CONNECTION;
PreparedStatment ps = con.prepareStatment(YOU SELECT);

ResultSet  result = ps.executeQuery();
while (result.next())
{
  pieModel.set(result.getSting("branch_code"), result.gtInt("accounts_opened "));
}