simpledao.java

一个画股票曲线并发送邮件的程序。 采用freechart和javamail技术。

package com.shfe.mail;

import java.io.*;
import java.sql.*;
import java.util.*;

import com.shfe.mail.GraphBean;

public class SimpleDAO {
    public double openPrice = 0.0;
    public double closePrice = 0.0;
    public String title = "";

    Connection conn = null;
    Statement stmt = null;
    ResultSet rs = null;

    public List getFuturesData() {
        List result = new ArrayList();
        try {
            Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
            String url = "jdbc:microsoft:sqlserver://localhost:1433;User=sa;Password=422322;DatabaseName=test";
            //Class.forName ("oracle.jdbc.driver.OracleDriver");
            //String url="jdbc:oracle:thin:@192.168.21.113:1521:trade");
            conn = DriverManager.getConnection(url);
            stmt = conn.createStatement();
            String sql = "select contractID,openPrice/1000 openPrice,closePrice/1000 closePrice,marketTime,lastPrice/1000 lastPrice,volumn from ttemp1 order by marketTime";
            System.out.println("sql="+sql);
            rs = stmt.executeQuery(sql);
            int i = 0;
            while (rs.next()) {
                if (i == 0) {
                    openPrice = rs.getDouble("lastPrice");
                    closePrice = rs.getDouble("closePrice");
                    title = rs.getString("contractID");
                }
                GraphBean graph = new GraphBean();
                graph.setContract(rs.getString("contractID"));
                graph.setTime(rs.getString("marketTime"));
                graph.setPrice(rs.getDouble("lastPrice"));
                graph.setAmount(rs.getInt("volumn"));
                result.add(graph);
                i++;
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            close();
        }
        return result;

    }

    public void close() {
        try {
            rs.close();
            stmt.close();
            conn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {

        SimpleDAO dao = new SimpleDAO();
        List mylist = dao.getFuturesData();
        System.out.println("mylist.size()=" + mylist.size());
        System.out.println("openPrice=" + dao.openPrice);
        System.out.println("closePrice=" + dao.closePrice);
        System.out.println("title=" + dao.title);

    }
}