賈云鵬

package com.jyp.dao;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;

public class BaseDao {


    //獲取連接
    protected Connection getConnection(){
        Connection conn=null;
            try {
                Class.forName("com.mysql.jdbc.Driver");
                // 2.建立連接
                conn = DriverManager.getConnection(
                        "jdbc:mysql://localhost:3306/test", "root", "123456");
            } catch (Exception e) {
                e.printStackTrace();
            } 
            return conn;
    }    
    

    
    
    //關閉連接
    protected void closeAll(Connection con,PreparedStatement ps,ResultSet rs){        
    try {
        if(rs != null)
            rs.close();
        if(ps != null)
            ps.close();
        if(con != null)
            con.close();
        
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
    
}

package com.jyp.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import javax.annotation.PreDestroy;

import com.jyp.entity.Msg;
import com.sun.org.apache.regexp.internal.recompile;

public class MsgDao extends BaseDao{
     public List<Msg> getMsgByReceiver(String uname) {
            List<Msg> list=new ArrayList<Msg>();
            Connection con=getConnection();
            String sql="select * from email where receiver=?";
            PreparedStatement ps=null;
            ResultSet rs=null;
            try{
                ps=con.prepareStatement(sql);
                ps.setString(1,uname);
                rs=ps.executeQuery();
                while(rs.next()){
                    Msg e=new Msg();
                    e.setId(rs.getInt(1));
                    e.setAddress(rs.getString(2));
                    e.setReceiver(rs.getString(3));
                    e.setTitle(rs.getString(4));
                    e.setContents(rs.getString(5));
                    e.setTime(rs.getDate(6));
                    e.setState(rs.getInt(7));
                    list.add(e);
                }
            }catch (Exception e) {
                // TODO: handle exception
                e.printStackTrace();
            }finally{
                closeAll(con, ps, rs);
            }
            return list;
            
        }
    
}

package com.jyp.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;



public class UsersDao extends BaseDao{
     public boolean login(String uname,String upwd) throws SQLException{
            
            boolean f= false;
            Connection conn =getConnection();
            PreparedStatement pred=null;
            ResultSet rest=null;
            String sql="select * from users where uname=? and upwd=?";
            try {
                pred =conn.prepareStatement(sql);
                pred.setString(1, uname);
                pred.setString(2, upwd);
                rest =pred.executeQuery();
                while(rest.next()){
                    f=true;
                }
            } catch (Exception e) {
                // TODO: handle exception
            }finally{
                closeAll(conn, pred, rest);
            }
            return f;
        }
        
        public boolean id(Integer id) throws SQLException{
            
            boolean f= false;
            Connection conn =getConnection();
            PreparedStatement pred=null;
            ResultSet rest=null;
            String sql="select * from users where id=?";
            try {
                pred =conn.prepareStatement(sql);
                pred.setInt(1, id);
                rest =pred.executeQuery();
                while(rest.next()){
                    f=true;
                }
            } catch (Exception e) {
                // TODO: handle exception
            }finally{
                closeAll(conn, pred, rest);
            }
            return f;
        }
        
        public void zhuce(Integer id,String uname,String upwd){
            Connection conn =getConnection();
            PreparedStatement pred=null;
            try {
                String sql="insert into users(id,uname,upwd) values(?,?,?)";
                pred =conn.prepareStatement(sql);
                pred.setInt(1, id);
                pred.setString(2, uname);
                pred.setString(3, upwd);
                pred.executeUpdate();
                
            } catch (Exception e) {
                // TODO: handle exception
            }
            finally{
                closeAll(conn, pred, null);
            }
        }
}

package com.jyp.entity;

import java.sql.Date;

public class Msg {
    private int id;
    private String address;
    private String receiver;
    private String title;
    private String contents;
    private Date time;
    private int state;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public String getReceiver() {
        return receiver;
    }
    public void setReceiver(String receiver) {
        this.receiver = receiver;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getContents() {
        return contents;
    }
    public void setContents(String contents) {
        this.contents = contents;
    }
    public Date getTime() {
        return time;
    }
    public void setTime(Date time) {
        this.time = time;
    }
    public int getState() {
        return state;
    }
    public void setState(int state) {
        this.state = state;
    }




    }

package com.jyp.entity;

public class Users {
    private int id;
    private String uname;
    private String upwd;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUname() {
        return uname;
    }
    public void setUname(String uname) {
        this.uname = uname;
    }
    public String getUpwd() {
        return upwd;
    }
    public void setUpwd(String upwd) {
        this.upwd = upwd;
    }
    public Users() {
        super();
    }

    
}