jsp第六次作业

package kkkks;

public class DeleteUserTest {
      public static void main(String[] args) {
            // TODO Auto-generated method stub
            UserDao dao=new UserDao();
            User u=new User();
            boolean flag=dao.delete(1);
            System.out.print(flag);
}
}

package kkkks;

public class FindAllUserTest {
     public static void main(String[] args) {
            // TODO Auto-generated method stub
            UserDao dao=new UserDao();
            User u=dao.findbyid(2);
            System.out.println(u.getName());
        }
}

package kkkks;

import java.awt.List;

public class FindUserByIdTest {
     public static void main(String[] args) {
            // TODO Auto-generated method stub
            UserDao dao=new UserDao();
            dao.findall();
            List list=(List) dao.findAllUser();
            System.out.print(list.size());
            
        }
}

package kkkks;

import java.util.Date;

public class jdbcInsertTest {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        UserDao dao=new UserDao();
        User user=new User();
        user.setId(5);
        user.setName("xff");
        user.setMoney(20000);
        user.setEmail("1245800618@qq.com");
        user.setBirthday((java.sql.Date) new Date(1998-02-07));
        boolean flag=dao.insert(user);
        System.out.print(flag);
    }

}

public class JDBCUils {

        // 获取对象方法
        public static Connection getcon() throws Exception {
            // 注册驱动
            Class.forName("com.mysql.jdbc.Driver");
            // 获取连接
            Connection con = DriverManager.getConnection(
                    "jdbc:mysql://localhost:3306/jdbc", "root", "root");
            return con;
        }

        public static void close(Statement st, Connection con, ResultSet rs) {
            if (rs != null) {
                try {
                    rs.close();
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    try {
                        if (con != null) {
                            con.close();
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    } finally {

                        try {
                            if (st != null) {
                                ((java.sql.Statement) st).close();
                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }

                }
            }

        }

    }

package kkkks;

public class UpdateUserTest {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        UserDao dao=new UserDao();
        User user=new User();
        user.setId(1);
        user.setMoney(22000);
        user.setName("xxx");
        boolean flag=dao.update(user);
        System.out.print(flag);
}
}

package kkkks;

import java.sql.Date;

public class User {
        private int id;
        private String name;
        private int money;
        private String email;
        private Date birthday;
        public int getId() {
            return id;
        }
        public void setId(int id) {
            this.id = id;
        }
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public int getMoney() {
            return money;
        }
        public void setMoney(int money) {
            this.money = money;
        }
        public String getEmail() {
            return email;
        }
        public void setEmail(String email) {
            this.email = email;
        }
        public Date getBirthday() {
            return birthday;
        }
        public void setBirthday(Date birthday) {
            this.birthday = birthday;
        }
        
    }

package kkkks;

import java.beans.Statement;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;



public class UserDao {
     // 提供添加方法
    public boolean insert(User user) {
        Connection con = null;
        Statement st = null;
        try {
            // 连接对象
            con = JDBCUils.getcon();
            // 获取执行sql语句
            st = (Statement) con.createStatement();
            // 执行sql语句
            // java.util.Date birthday=user.getBirthday();
            java.sql.Date sqlbirthday = new java.sql.Date(
                    new java.util.Date().getTime());
            int row = ((java.sql.Statement) st)
                    .executeUpdate("insert into user(id,name,money,email,birthday)"
                            + "values("
                            + user.getId()
                            + ",'"
                            + user.getName()
                            + "','"
                            + user.getMoney()
                            + "','"
                            + user.getEmail()
                            + "','" + sqlbirthday + "'" + ")");
            if (row > 0) {
                return true;
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            JDBCUils.close(st, con, null);
        }
        return false;

    }
    public void findall(){
        Connection con = null;
        Statement st = null;
        ResultSet rs = null;
        
        try {
            // 连接对象
            con = JDBCUils.getcon();
            // 获取执行sql语句
            st = (Statement) con.createStatement();
            //执行sql语句
            rs=((java.sql.Statement) st).executeQuery("select * from user");
            //遍历rs
            while(rs.next()){
                System.out.println(rs.getInt("id")+" "+rs.getString("name")+" "
                        +rs.getInt("money")+" "+rs.getString("email")+" "+rs.getDate("birthday")+"");
            }
        
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            JDBCUils.close(st, con, rs);
        }
        
        
    }
    
    //提供查询所有语句的方法
        public List<User> findAllUser() {
            Connection con = null;
            Statement st = null;
            ResultSet rs = null;
            
            try {
                // 连接对象
                con = JDBCUils.getcon();
                // 获取执行sql语句
                st = (Statement) con.createStatement();
                //执行sql语句
                rs=((java.sql.Statement) st).executeQuery("select * from user");
                //遍历rs
                List<User> list=new ArrayList<User>();
                while(rs.next()){
                    
                    User user=new User();
                    /*System.out.println(rs.getInt("id")+" "+rs.getString("name")+" "
                            +rs.getInt("money")+" "+rs.getString("email")+" "+rs.getDate("birthday")+"");
                            */
                    
                    user.setId(rs.getInt("id"));
                    user.setName(rs.getString("name"));
                    user.setMoney(rs.getInt("money"));
                    user.setEmail(rs.getString("email"));
                    user.setBirthday(rs.getDate("birthday"));
                    list.add(user);
                
                            
                }
            return list;
            } catch (Exception e) {
                e.printStackTrace();
            }finally{
                JDBCUils.close(st, con, rs);
            }
            return null;
                
        }
        //根据id查询对象
        public User findbyid(int id){
            Connection con = null;
            PreparedStatement st = null;
            ResultSet rs = null;
            
            try {
                // 连接对象
                con = JDBCUils.getcon();
                // 获取执行sql语句
                st=con.prepareStatement("select * from user where id=?");
                
                //执行sql语句
                st.setInt(1, id);
                rs=st.executeQuery();
                //遍历rs
                if(rs.next()){
                    User user=new User();
                    user.setId(rs.getInt("id"));
                    user.setName(rs.getString("name"));
                    user.setMoney(rs.getInt("money"));
                    user.setEmail(rs.getString("email"));
                    user.setBirthday(rs.getDate("birthday"));
                    return user;
                }
            
            } catch (Exception e) {
                e.printStackTrace();
            }finally{
                JDBCUils.close((Statement) st, con, rs);
            }
            return null;
        }
        

//提供修改数据方法
public boolean update(User user){
    Connection con = null;
    PreparedStatement st = null;
    try {
        // 连接对象
        con = JDBCUils.getcon();
        // 获取执行sql语句
        
        st = con.prepareStatement("update user set money=?,name=? where id=?");
        // 执行sql语句
        st.setInt(3, user.getId());
        st.setInt(1, user.getMoney());
        st.setString(2, user.getName());
        int row = st.executeUpdate();
        if (row > 0) {
            return true;
        }

    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        JDBCUils.close((Statement) st, con, null);
    }
    return false;
    
}

//提供删除数据方法
public boolean delete(int id){
    Connection con = null;
    Statement st = null;
    try {
        // 连接对象
        con = JDBCUils.getcon();
        // 获取执行sql语句
        
        st = (Statement) con.prepareStatement("delete from user where id=?");
        // 执行sql语句
        ((PreparedStatement) st).setInt(1, id);
        int row = ((PreparedStatement) st).executeUpdate();
        if (row > 0) {
            return true;
        }

    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        JDBCUils.close(st, con, null);
    }
    return false;
    
    
    
}
}