标签：结对 课堂练习 get int rs List FinalGraph add 地铁

第一阶段-地铁查询系统：

java代码编写部分：

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";//db是数据所在的数据库
    public final String UName = "root";
    public final String PassWord = "";//数据库密码

    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;
    }

}

DateInputing.java:

package Date;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

import Model.GraphModel;
import Model.LineModel;



public class DateInputing {


   public static List<LineModel> FinalLine = new ArrayList<LineModel>();  //地铁线路信息
   public List<GraphModel> FinalGraph = new ArrayList<GraphModel>();  //邻接表信息
   
   public DateInputing() throws IOException, ClassNotFoundException {

      Scanner sc = new Scanner(System.in);

      System.out.println("---");

      Dao da = new Dao();
      int count = 0;
      while(true) {

         LineModel tmpline = da.selectkluxian(++count);


         if(tmpline.getStations().size() == 0) {

            continue;

         }
            if (count == 15) {

               break;

            }
         //存储线路信息

         List<String> LineStation = tmpline.getStations();
         //System.out.println(LineStation.size() + "-");

         String[] tmpdata = new String[tmpline.getStations().size() + 1];
         tmpdata[0] = tmpline.getLineName();
         for (int i = 1; i <= LineStation.size(); i++) {

            tmpdata[i] = LineStation.get(i - 1);

         }

         FinalLine.add(tmpline);

         //将线路信息处理成邻接表
         String tmp1 = tmpdata[1];
         String tmp2 = tmpdata[2];
         //System.out.println(tmp2);
         for (int i = 2; i < tmpdata.length; i++) {

            List<String> stations = new ArrayList<String>();
            List<String> LineName = new ArrayList<String>();
            List<String> stations1 = new ArrayList<String>();
            List<String> LineName1 = new ArrayList<String>();


            GraphModel graphstation = new GraphModel();
            GraphModel graphstation1 = new GraphModel();
            //判断tmp1是否是已经存储过
            int isExit = 0;
            int m = 0;
            for (int j = 0; j < FinalGraph.size(); j++) {
               if (tmp1.equals(FinalGraph.get(j).getStationName())) {
                  isExit = 1;
                  m = j;      //tmp1在FinalGraph哪一个位置，存储到m中
                  break;
               }
            }


            //判断tmp2是否是已经存储过
            int isExit1 = 0;
            int n = 0;
            for (int j = 0; j < FinalGraph.size(); j++) {
               if (tmp2.equals(FinalGraph.get(j).getStationName())) {
                  isExit1 = 1;
                  n = j;
                  break;
               }
            }

            int p = 0;
            if (isExit == 0 && isExit1 == 0) {          //tmp1未存储过，tmp2未存储过
               graphstation.setStationName(tmp1);    //未存储过，新建graphstation类，将数据存入类中，最后压入FinalGraph类
               LineName.add(tmpdata[0]);
               stations.add(tmp2);
               graphstation.setLineName(LineName);
               graphstation.setStations(stations);

               graphstation1.setStationName(tmp2);
               LineName1.add(tmpdata[0]);
               stations1.add(tmp1);
               graphstation1.setLineName(LineName1);
               graphstation1.setStations(stations1);

               FinalGraph.add(graphstation);
               FinalGraph.add(graphstation1);

            } else if (isExit == 0 && isExit1 == 1) {          //tmp1未存储过，tmp2已存储过
               graphstation.setStationName(tmp1);
               LineName.add(tmpdata[0]);
               stations.add(tmp2);
               graphstation.setLineName(LineName);
               graphstation.setStations(stations);

               List<String> station = FinalGraph.get(n).getStations();   //已存储过，则在FinalGraph第n个位置，在相邻战点后面加上
               List<String> linename = FinalGraph.get(n).getLineName();
               station.add(tmp1);
               for (int t = 0; t < linename.size(); t++) {
                  if (tmpdata[0].equals(linename.get(t))) {
                     p = 1;
                     break;
                  }
               }
               if (p == 0)
                  linename.add(tmpdata[0]);
               FinalGraph.get(n).setLineName(linename);
               FinalGraph.get(n).setStations(station);

               FinalGraph.add(graphstation);
            } else if (isExit == 1 && isExit1 == 0) {          //tmp1已存储过，tmp2未存储过
               graphstation.setStationName(tmp2);
               LineName1.add(tmpdata[0]);
               stations1.add(tmp1);
               graphstation.setLineName(LineName1);
               graphstation.setStations(stations1);

               List<String> station = FinalGraph.get(m).getStations();
               List<String> linename = FinalGraph.get(m).getLineName();
               station.add(tmp2);
               for (int t = 0; t < linename.size(); t++) {
                  if (tmpdata[0].equals(linename.get(t))) {
                     p = 1;
                     break;
                  }
               }
               if (p == 0)
                  linename.add(tmpdata[0]);
               FinalGraph.get(m).setLineName(linename);
               FinalGraph.get(m).setStations(station);

               FinalGraph.add(graphstation);
            } else if (isExit == 1 && isExit1 == 1) {          //tmp1，tmp2都已存储过
               List<String> station = FinalGraph.get(m).getStations();
               List<String> linename = FinalGraph.get(m).getLineName();
               station.add(tmp2);
               for (int t = 0; t < linename.size(); t++) {
                  if (tmpdata[0].equals(linename.get(t))) {
                     p = 1;
                     break;
                  }
               }
               if (p == 0)
                  linename.add(tmpdata[0]);
               FinalGraph.get(m).setLineName(linename);
               FinalGraph.get(m).setStations(station);

               List<String> station1 = FinalGraph.get(n).getStations();
               List<String> linename1 = FinalGraph.get(n).getLineName();
               station1.add(tmp1);
               for (int t = 0; t < linename1.size(); t++) {
                  if (tmpdata[0].equals(linename1.get(t))) {
                     p = 1;
                     break;
                  }
               }
               if (p == 0)
                  linename1.add(tmpdata[0]);
               FinalGraph.get(n).setLineName(linename1);
               FinalGraph.get(n).setStations(station1);

            }
            tmp1 = tmp2;
            if (i + 1 < tmpdata.length)
               tmp2 = tmpdata[i + 1];
            else
               break;

         }

      }
      
   }
   
   
   
}

标签：结对,课堂练习,get,int,rs,List,FinalGraph,add,地铁
来源： https://www.cnblogs.com/wlqyyds/p/16298170.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。