JSP第十一周作业

package aaa;

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 {


    //获取连接
    protected Connection getConnection(){
        Connection conn=null;
            try {
                Class.forName("com.mysql.jdbc.Driver");
                // 2.建立连接
                conn = DriverManager.getConnection(
                        "jdbc:mysql://localhost:3306/test", "root", "root");
            } catch (Exception e) {
                e.printStackTrace();
            } 
            return conn;
    }    
    

    
    
    //关闭连接
    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 dao;
 
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
 
import entity.Msg;
 
public class MsgDao extends BaseDao {
 
    public List<Msg> getMailByReceiver(String name) {
        List<Msg> list = new ArrayList<Msg>();
        Connection conn = getConnection();
        String sql = "select * from mail where addressee=?";
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            ps = conn.prepareStatement(sql);
            ps.setString(1, name);
            rs = ps.executeQuery();
            while (rs.next()) {
                Msg m = new Msg();
                int eid = rs.getInt("eid");
                String sender = rs.getString("sender");
                String addressee = rs.getString("addressee");
                String title = rs.getString("title");
                String content = rs.getString("content");
                Date sending_time = rs.getDate("sending_time");
                int state = rs.getInt("state");
                m.setEid(eid);
                m.setSender(sender);
                m.setAddressee(addressee);
                m.setTitle(title);
                m.setContent(content);
                m.setSending_time(sending_time);
                m.setState(state);
                list.add(m);
            }
 
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            closeAll(conn, ps, rs);
        }
        return list;
    }
 
}

package com.gd.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.cui.entity;
 
import java.sql.Date;
 
public class message {
    private int mid;            //编号
    private String username;    //发件人姓名
    private String receiver;    //收件人姓名
    private String title;       //标题
    private String text;        //内容
    private Date sendtime;      //发送时间
    private int state;          //状态
    public int getMid() {
        return mid;
    }
    public void setMid(int mid) {
        this.mid = mid;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    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 getText() {
        return text;
    }
    public void setText(String text) {
        this.text = text;
    }
    public Date getSendtime() {
        return sendtime;
    }
    public void setSendtime(Date sendtime) {
        this.sendtime = sendtime;
    }
    public int getState() {
        return state;
    }
    public void setState(int state) {
        this.state = state;
    }
     
     
 
}

<html>
  <head>    
    <title>login</title>
  </head>
  
  <body>
  <p>欢迎来到登录页面!!</p><br>
    
    <form  name="form" action="dologin.jsp" method="post">
      用户名：<input type="text" name="uname"><br>
      密码：<input type="password" name="upwd"><br>
        <input type="submit" value="登录" >    <br>
    <a href="zhuce.jsp">注册新用户</a>
    </form>
  </body>
</html>

<html>
  <head>    
    <title>register</title>
  </head>
  
  <body>
  <p>欢迎来到注册界面</p>
  <form  name="form" action="dozhuce.jsp" method="post">
      姓名：<input type="text" name="uname"><br>
      密码：<input type="password" name="upwd"><br>
    <input type="submit" value="注册完成" >    <br>
    <a href="dozhuce.jsp">返回登录界面</a>
    </form>
  </body>
</html>