scoredao.java

这是一个员工管理系统

package com.orilore.ssms.dao;

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.PreparedStatement;
import com.orilore.ssms.entity.Score;
import java.util.List;
import java.sql.ResultSet;
import java.util.ArrayList;
import com.orilore.ssms.entity.Student;
import com.orilore.ssms.entity.Cource;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2009</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class ScoreDao {
    public ScoreDao() {
    }

    public boolean insertScore(Score s){
        boolean flag = false;
        Connection conn = DbManager.getConn();
        try {
            PreparedStatement pst = conn.prepareStatement(
                    "insert into score(sid,cid,score) values(?,?,?)");

            pst.setInt(1,s.getStudent().getId());
            String cname = s.getCource().getCname();
            CourceDao cd = new CourceDao();
            int cid = cd.findIdByName(cname);
            pst.setInt(2,cid);
            pst.setInt(3,s.getScore());
            pst.executeUpdate();
            flag = true;
            pst.close();
            conn.close();
        } catch (SQLException ex) {
            ex.printStackTrace();
        }


        return flag;

    }

    public List findAll(){
        List<Score> list = new ArrayList();
        Connection conn = DbManager.getConn();
        PreparedStatement pst = null;
        try {
            pst = conn.prepareStatement("select sc.id as scid,st.id as stid,st.name as stname,c.cname as cname,sc.score as score from score sc inner join student st on sc.sid=st.id inner join cource c on sc.cid=c.id");
            ResultSet rs = pst.executeQuery();
            while(rs.next()){
                Score s = new Score();
                s.setId(rs.getInt("scid"));
                Student st = new Student();
                st.setId(rs.getInt("stid"));
                st.setName(rs.getString("stname"));
                s.setStudent(st);
                Cource c = new Cource();
                c.setCname(rs.getString("cname"));
                s.setScore(rs.getInt("score"));
                list.add(s);

            }
            rs.close();
            pst.close();
            conn.close();

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


        return list;

    }


}