第十一周作业
1.建库，建表2个
用户表（id,用户名，密码）
邮件表（id,发件人，收件人，标题，内容，发送时间，状态）
2.建model层
entity,dao包
3.登陆，注册，登陆后显示全部邮件
BaseDao.java
package 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 {
//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();
}
}
}
MsgDao.java
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.List; import entity.Msg; public class MsgDao extends BaseDao{ //关于邮件的增删改查 //添加邮件(写邮件，回复邮件都调用，邮件状态为0，时间为系统当前时间) //根据id删除邮件 //根据id修改邮件状态（统一改成1） //根据收件人查看全部邮件 public List<Msg> getMailByReceiver(String name){ List<Msg> list=new ArrayList<Msg>(); Connection con=getConnection(); String sql="select * from msg where username=?"; PreparedStatement ps=null; ResultSet rs=null; try { ps = con.prepareStatement(sql); ps.setString(1, name); rs=ps.executeQuery(); while(rs.next()){ //每读取一行，创建一个msg对象，对象放到集合中 Msg m=new Msg(); m.setMsgid(rs.getInt(1)); m.setUsername(rs.getString(2)); m.setTitle(rs.getString(3)); m.setMsgcontent(rs.getString(4)); m.setState(rs.getInt(5)); m.setSendto(rs.getString(6)); m.setMsg_create_date(rs.getDate(7)); list.add(m); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ closeAll(con, ps, rs); } return list; } UserDao.java package dao; import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException; public class UsersDao extends BaseDao{ //关于用户的增删改查，用到什么功能鞋什么 //登陆 public boolean login(String name,String pwd){ boolean f=false; Connection conn=getConnection(); String sql="select * from users where uname=? and upwd=?"; PreparedStatement ps; try { ps = conn.prepareStatement(sql); ps.setString(1, name);//第一个？赋值为name ps.setString(2, pwd); ResultSet rs=ps.executeQuery(); if(rs.next())//查到结果了 f=true; closeAll(conn, ps, rs); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } return f; } //注册 public int logon(String uname, int upwd) { Connection conn = getConnection(); PreparedStatement ps = null; int r = -1; try { String sql = "insert into users(uname,upwd) values(?,?)"; // 2个占位符 // 4.执行SQL语句 ps = conn.prepareStatement(sql); ps.setString(1, uname); ps.setInt(2, upwd); r = ps.executeUpdate();// 增删改都用这个 } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { closeAll(conn, ps, null); } return r; } }
Msg.java
package entity;
import java.util.Date;
public class Msg {
private int msgid;
private String username;
private String title;
private String msgcontent;
private int state;
private String sendto;
private Date msg_create_date;
@Override
public String toString() {
return "Msg [msgid=" + msgid + ", username=" + username + ", title="
+ title + ", msgcontent=" + msgcontent + ", state=" + state
+ ", sendto=" + sendto + ", msg_create_date=" + msg_create_date
+ "]";
}
public int getMsgid() {
return msgid;
}
public void setMsgid(int msgid) {
this.msgid = msgid;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getMsgcontent() {
return msgcontent;
}
public void setMsgcontent(String msgcontent) {
this.msgcontent = msgcontent;
}
public int getState() {
return state;
}
public void setState(int state) {
this.state = state;
}
public String getSendto() {
return sendto;
}
public void setSendto(String sendto) {
this.sendto = sendto;
}
public Date getMsg_create_date() {
return msg_create_date;
}
public void setMsg_create_date(Date msg_create_date) {
this.msg_create_date = msg_create_date;
}
}
Users.java
package entity;
public class Users {
int id;
String uname;
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;
}
}
login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html><head> <title>My JSP 'student.jsp' starting page</title> </head><% %><body> <form action="login_link.jsp"> 姓名：<input type="text" name="name" /> <br>密码：<input type="password" name="pwd" /> <br><input type="submit" value="登录" /> </form> <form action="logon.jsp"> <input type="submit" value="注册" /> </form></body></html>
login_link.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html><head> <title></title> </head><%@ page import="dao.UsersDao"%><% String name = request.getParameter("name"); String pwd = request.getParameter("pwd"); String uname = new String(name.getBytes("ISO-8859-1"), "utf-8"); try { UsersDao usersdao = new UsersDao(); if (usersdao.login(uname, pwd)) { String n = (String) session.getAttribute("uname"); if (n == null) { session.setAttribute("uname", name); } request.getRequestDispatcher("mail.jsp").forward(request, response); } else { out.println("登陆失败！"); out.println("三秒后跳转到登录页面..."); response.setHeader("refresh", "3;url=login.jsp"); } } catch (Exception e) { out.println("异常！！"); out.println("三秒后跳转到登录页面..."); response.setHeader("refresh", "3;url=login.jsp"); }%><body> <a href="login.jsp">返回</a></body></html>
logon.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html><head> <title></title> </head><% %><body> <h3>请输入信息来完成注册...</h3> <form action="logon_link.jsp"> 用户名：<input type="text" name="name" /> 密码:<input type="password" name="pwd" /> <input type="submit" value="注册" /> </form> <a href="login.jsp">返回</a></body></html>
logon_link.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html><head> <title>My JSP 'slogon_link.jsp' starting page</title> </head><%@ page import="dao.UsersDao"%><% String name = request.getParameter("name"); String upwd = request.getParameter("pwd"); String uname=new String(name.getBytes("ISO-8859-1"),"utf-8"); int pwd = Integer.parseInt(upwd); UsersDao usersdao=new UsersDao(); if (usersdao.logon(uname, pwd) != -1) { out.println("注册成功！"); out.println("三秒后跳转到登录页..."); response.setHeader("refresh", "3;url=login.jsp"); } else { out.println("注册失败！"); out.println("三秒后跳转到登录页..."); response.setHeader("refresh", "3;url=login.jsp"); }%><body></body></html>
mail.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html><head> <title></title><%@ page import="dao.MsgDao"%><%@ page import="entity.Msg"%><style type="text/css"> table { border: 1px black solid; width: 500px;}</style></head> <body> <% String name = (String) session.getAttribute("uname"); String uname = new String(name.getBytes("ISO-8859-1"), "utf-8"); %> <% out.println(uname); %>的邮箱： <br> <% MsgDao m = new MsgDao(); List<Msg> list = m.getMailByReceiver(uname); %> <table> <tr> <td>发件人</td> <td>主题</td> <td>状态</td> <td>时间</td> </tr> <% for (int i = 0; i < list.size(); i++) { %> <tr> <td><%=list.get(i).getUsername()%></td> <td><%=list.get(i).getTitle()%></td> <td> <% if (list.get(i).getState() == 0) { %><img src="image/weidu.png" /> <% } else { %> <img src="image/yidu.png" /> <% } %> </td> <td><%=list.get(i).getMsg_create_date()%></td> <% } %> </table></body></html>
