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    自我评审:

    package imp;
    
    import java.sql.Connection;
    import java.sql.PreparedStatement;
    import java.sql.ResultSet;
    import java.sql.SQLException;
    import java.text.*;
    import java.util.ArrayList;
    import java.util.Date;
    import java.util.List;
    
    import bean.Admin;
    import bean.Book;
    import bean.Lend;
    import bean.User;
    
    import tools.ConnectionManager;
    import dao.AdminDao;
    
    public class AdminDaoImp implements AdminDao {
    
        public Connection con = null;
        PreparedStatement ps = null;
        public ResultSet rs = null;
    
        @Override
        public Admin login(String a_name, String a_password) {
            Admin admin = new Admin();
            con = ConnectionManager.getConnection();
            String sql = "select * from admin where a_username=? and a_password=?";
            try {
                ps = con.prepareStatement(sql);
                ps.setString(1, a_name);
                ps.setString(2, a_password);
                rs = ps.executeQuery();
                if (rs.next() == false) {
                    admin.setA_username("00000000");
                } else {
                    admin.setA_username("a_name");
                }
    
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return admin;
        }
    
        @Override
        public int addbooks(Book book) {
            int result = 0;
            con = ConnectionManager.getConnection();
            String sql = "insert into bookinfo(b_name,b_price,b_writer,b_press,b_type,b_location,b_barcoad) values(?,?,?,?,?,?,?)";
    
            try {
                ps = con.prepareStatement(sql);
                ps.setString(1, book.getB_name());
                ps.setString(2, book.getB_price());
                ps.setString(3, book.getB_writer());
                ps.setString(4, book.getB_press());
                ps.setString(5, book.getB_type());
                ps.setString(6, book.getB_location());
                ps.setString(7, book.getB_barcoad());
                result = ps.executeUpdate();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return result;
        }
    
        @Override
        public List<User> getAllUser() {
            List<User> list = new ArrayList<User>();
            try {
                con = ConnectionManager.getConnection();
                ps = con.prepareStatement("select * from userinfo");
                rs = ps.executeQuery();
                while (rs.next()) {
                    User user = new User();
                    user.setR_id(rs.getString("r_ID"));
                    user.setR_name(rs.getString("r_name"));
                    user.setR_sex(rs.getString("r_sex"));
                    user.setR_occ(rs.getString("r_occ"));
                    user.setR_IDnum(rs.getString("r_IDnum"));
                    user.setTel(rs.getString("r_tel"));
                    user.setR_mail(rs.getString("r_mail"));
                    list.add(user);
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return list;
        }
    
        @Override
        public List<Book> getAllBook() {
            List<Book> list = new ArrayList<Book>();
            try {
                con = ConnectionManager.getConnection();
                ps = con.prepareStatement("select * from bookinfo");
                rs = ps.executeQuery();
                while (rs.next()) {
                    Book book = new Book();
                    book.setB_ID(rs.getString("b_ID"));
                    book.setB_name(rs.getString("b_name"));
                    book.setB_price(rs.getString("b_price"));
                    book.setB_writer(rs.getString("b_writer"));
                    book.setB_press(rs.getString("b_press"));
                    book.setB_type(rs.getString("b_type"));
                    book.setB_location(rs.getString("b_location"));
                    book.setB_barcoad(rs.getString("b_barcoad"));
                    list.add(book);
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return list;
        }
    
        @Override
        public int deletBook(String bid) {
            int result = 0;
            Connection connection = ConnectionManager.getConnection();
            String sql = "DELETE FROM bookinfo WHERE b_ID=?";
    
            try {
                PreparedStatement preparedStatement = connection.prepareStatement(sql);
                preparedStatement.setString(1, bid);
                result = preparedStatement.executeUpdate();
                if (result != 0) {
                    result = 1;
                } else {
                    result = 0;
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return result;
        }
    
        @Override
        public Book getbook(String bid) {
            Book book = new Book();
            con = ConnectionManager.getConnection();
            String sql = "select * from bookinfo where b_ID=?";
            try {
                ps = con.prepareStatement(sql);
                ps.setString(1, bid);
                rs = ps.executeQuery();
                while (rs.next()) {
                    book.setB_ID(rs.getString("b_ID"));
                    book.setB_name(rs.getString("b_name"));
                    book.setB_price(rs.getString("b_price"));
                    book.setB_writer(rs.getString("b_writer"));
                    book.setB_press(rs.getString("b_press"));
                    book.setB_type(rs.getString("b_type"));
                    book.setB_location(rs.getString("b_location"));
                    book.setB_barcoad(rs.getString("b_barcoad"));
                }
    
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return book;
        }
    
        @Override
        public int updatebook(String bid, Book book) {
            int result = 0;
            con = ConnectionManager.getConnection();
            String sql = "UPDATE bookinfo SET b_name=?, b_price=?, b_writer=?, b_press=?, b_type=?, b_location=?, b_barcoad=? WHERE b_ID=?;";
    
            try {
                ps = con.prepareStatement(sql);
                ps.setString(1, book.getB_name());
                ps.setString(2, book.getB_price());
                ps.setString(3, book.getB_writer());
                ps.setString(4, book.getB_press());
                ps.setString(5, book.getB_type());
                ps.setString(6, book.getB_location());
                ps.setString(7, book.getB_barcoad());
                ps.setString(8, bid);
                result = ps.executeUpdate();
                if (result != 0) {
                    result = 1;
                } else {
                    result = 0;
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return result;
        }
    
        @Override
        public int borrowBook(Lend lend) {
            int result = 0;
            con = ConnectionManager.getConnection();
            String sql = "insert into lending(r_tel,b_barcoad,l_borrowtime,l_backtime,l_return,l_punishment) values(?,?,?,?,?,?)";
    
            try {
                ps = con.prepareStatement(sql);
                ps.setString(1, lend.getR_tel());
                ps.setString(2, lend.getB_barcoad());
                ps.setString(3, lend.getL_borrowtime());
                ps.setString(4, lend.getL_backtime());
                ps.setString(5, lend.getL_return());
                ps.setString(6, lend.getL_punishment());
                result = ps.executeUpdate();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return result;
        }
    
        @Override
        public int returnbook(Lend lend) {
            int result = 0;
            con = ConnectionManager.getConnection();
            String sql = "UPDATE lending SET l_return=? WHERE r_tel=? AND b_barcoad=?;";
    
            try {
                ps = con.prepareStatement(sql);
                ps.setInt(1, 1);
                ps.setString(2, lend.getR_tel());
                ps.setString(3, lend.getB_barcoad());
                result = ps.executeUpdate();
                if (result != 0) {
                    result = 1;
                } else {
                    result = 0;
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return result;
        }
    
        @Override
        public void overdueBook() {
            List<Lend> time = getTime();
            DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
            for (int i = 0; i < time.size(); i++) {
                Lend lend = new Lend();
                lend = (Lend) time.get(i);
                try {
                    Date date = new Date();
                    String times = df.format(date);
                    Date d1 = df.parse(lend.getL_backtime());
                    Date d2 = df.parse(times);
                    long diff = d1.getTime() - d2.getTime();
                    long punishment = diff / (1000 * 60 * 60 * 24);
                    if (punishment < 0) {
                        punishment(lend.getID());
                    }
                } catch (Exception e) {
                }
            }
        }
    
    
        public void punishment(String ID) {
            con = ConnectionManager.getConnection();
            String sql = "UPDATE lending SET l_punishment=1 WHERE ID=?;";
    
            try {
                ps = con.prepareStatement(sql);
                ps.setString(1, ID);
                ps.executeUpdate();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    
        public List<Lend> getTime() {
            List<Lend> list = new ArrayList<Lend>();
            try {
                con = ConnectionManager.getConnection();
                ps = con.prepareStatement("SELECT * FROM lending WHERE l_punishment = 0;");
                rs = ps.executeQuery();
                while (rs.next()) {
                    Lend lend = new Lend();
                    lend.setL_backtime(rs.getString("l_backtime"));
                    lend.setID(rs.getString("ID"));
                    list.add(lend);
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return list;
        }
    
        @Override
        public List<Lend> getoverdue() {
            overdueBook();
            List<Lend> list = new ArrayList<Lend>();
            try {
                con = ConnectionManager.getConnection();
                ps = con.prepareStatement("select * from lending WHERE l_punishment = 1;");
                rs = ps.executeQuery();
                while (rs.next()) {
                    Lend lend = new Lend();
                    lend.setR_tel(rs.getString("r_tel"));
                    lend.setB_barcoad(rs.getString("b_barcoad"));
                    lend.setL_backtime(rs.getString("l_backtime"));
                    list.add(lend);
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return list;
        }
    }

    评审结果:

    1.函数的方法名定义太随意

    2.在类中没有注释,方法功能不明确

    3.参数值意义不清楚

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  • 原文地址:https://www.cnblogs.com/cggh/p/6624324.html
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