Java连接操作数据库

import org.omg.PortableInterceptor.SYSTEM_EXCEPTION;

import java.sql.*;
import java.text.DecimalFormat;
import java.text.Format;
import java.text.Normalizer;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.List;

public class DBUtil {
    private final static String dbURL = "jdbc:sqlserver://localhost:1433;DatabaseName=canbinanalysis";//连接数据库的路径
    private final static String userName = "sa";//数据库用户名
    private final static String userPwd = "******";//数据库密码
    private static Connection dbConn = null;

    static {
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            dbConn = DriverManager.getConnection(dbURL, userName, userPwd);//连接数据库
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public static Connection getConnection() {
        return dbConn;
    }

    public List<String> getSTring() throws SQLException {
        Statement stmt = dbConn.createStatement();
        ResultSet rs = stmt.executeQuery("select flight1,flight2 from Flight ");//执行sql语句
        List<String[]> list1 = new ArrayList<String[]>();
        List<String> list = new ArrayList<String>();
        String start = null;
        String arrive = null;
        GregorianCalendar d = new GregorianCalendar();
        for (int k = 0; k < 30; k++) {
            int today = d.get(Calendar.DAY_OF_MONTH);
            int month = d.get(Calendar.MONDAY);
            month = month +1 ;
            int year = d.get(Calendar.YEAR);
            Format f1 = new DecimalFormat("00");
            Format f2 = new DecimalFormat("0000");
            String date = f2.format(year) + f1.format(month) + f1.format(today);
            d.add(Calendar.DAY_OF_MONTH, 1);
            String url = "http://open.jiulvxing.com/open/av?start=START&arrive=ARRIVATE&date=DATE&sign=bjs&uuid=f6d0dd5d58e1491085994c5fdba814b6";
            while (rs.next()) {
                String[] s = new String[2];
                s[0] = rs.getString("flight1");
                s[1] = rs.getString("flight2");
                list1.add(s);
            }
            for (int i = 0; i < list1.size(); i++) {
                start = list1.get(i)[0];
                arrive = list1.get(i)[1];
                String u = url.replace("START", start).replace("ARRIVATE", arrive).replace("DATE", date);
                list.add(u);
            }
        }
            return list;

    }
}