结队作业-地铁查询系统(2)

dao.java:

package Date;

import Model.LineModel;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.ArrayList;
public class Dao {

    public final String U = "jdbc:mysql://localhost:3306/db?&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&useSSL=true";
    public final String UName = "root";
    public final String PassWord = "";

    public LineModel selectkluxian(int no1) {

        PreparedStatement ps = null;
        Connection con = null;
        LineModel kc= new LineModel();
        List<String> station = new ArrayList<>();
        ResultSet rs = null;

        try {

            Class.forName("com.mysql.cj.jdbc.Driver");
            con = DriverManager.getConnection(U, UName, PassWord);
            String sql = "select * from line where no1 =?";
            ps = con.prepareStatement(sql);
            ps.setInt(1, no1);
            rs = ps.executeQuery();

            int count = 0;
            while(rs.next())
            {
                count++;

                //System.out.println(count);
                int ID=rs.getInt("ID");
                String name=rs.getString("name");
                //System.out.println(name);
                int no=rs.getInt("no1");
                if(count == 1) {
                    kc.setLineName(no + "号线");
                }
                station.add(name);
                //list.add(kc);
            }
            kc.setStations(station);
            return kc;
        }catch (ClassNotFoundException e) {
            e.printStackTrace();
        }catch (SQLException e) {
            e.printStackTrace();
        }catch (Exception e) {

            e.printStackTrace();

        }finally {

            try {
                if(rs!= null) rs.close();
                if(ps!= null) ps.close();
                if(con!= null) con.close();

            } catch (SQLException e) {
                e.printStackTrace();
            }

        }
     return kc;
    }

    public List<String> selectzhantai(String name) {

        PreparedStatement ps = null;
        Connection con = null;
        LineModel kc= new LineModel();
        List<String> station = new ArrayList<>();
        List<String> s = new ArrayList<>();
        ResultSet rs = null;

        try {

            Class.forName("com.mysql.cj.jdbc.Driver");
            con = DriverManager.getConnection(U, UName, PassWord);
            String sql = "select * from line where name =?";
            ps = con.prepareStatement(sql);
            ps.setString(1, name);
            rs = ps.executeQuery();

            int count = 0;
            while(rs.next())
            {
                String tname=rs.getString("name");
                int no = rs.getInt("no1");
                //System.out.println(name);
                s.add(no+"号线"+" ");
                //list.add(kc);
            }
            return s;
        }catch (ClassNotFoundException e) {
            e.printStackTrace();
        }catch (SQLException e) {
            e.printStackTrace();
        }catch (Exception e) {

            e.printStackTrace();

        }finally {

            try {
                if(rs!= null) rs.close();
                if(ps!= null) ps.close();
                if(con!= null) con.close();

            } catch (SQLException e) {
                e.printStackTrace();
            }

        }
        return s;
    }


    public List<String> selectxianlu2(int no1) {

        PreparedStatement ps = null;
        Connection con = null;
        List<String> station = new ArrayList<>();
        List<String> s = new ArrayList<>();
        ResultSet rs = null;

        try {

            Class.forName("com.mysql.cj.jdbc.Driver");
            con = DriverManager.getConnection(U, UName, PassWord);
            String sql = "select * from line where  =?";
            ps = con.prepareStatement(sql);
            ps.setInt(1, no1);
            rs = ps.executeQuery();

            int count = 0;
            while(rs.next())
            {
                String name=rs.getString("name");
                station.add(name);
                //list.add(kc);
            }
            return station;
        }catch (ClassNotFoundException e) {
            e.printStackTrace();
        }catch (SQLException e) {
            e.printStackTrace();
        }catch (Exception e) {

            e.printStackTrace();

        }finally {

            try {
                if(rs!= null) rs.close();
                if(ps!= null) ps.close();
                if(con!= null) con.close();

            } catch (SQLException e) {
                e.printStackTrace();
            }

        }
        return station;
    }