第十三次作业
上机作业（邮件功能）的控制层代码改用为servlet实现。
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <script type="text/javascript"> function validate(){ if(loginForm.uname.value==""){ alert("账号不能为空!"); return; } if(loginForm.upwd.value==""){ alert("密码不能为空!"); return; } loginForm.submit(); } </script> <form action="logServlet"> 用户名：<input type="text" name="uname" /> 密码：<input type="password" name="upwd" /><input type="submit" value="登录" /> </form> <form action="register.jsp"> <br> 没有账号需要注册?<input type="submit" value="注册" /> </form> </body> </html> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@page import="com.bk.dog.MailDao"%> <%@page import="com.bk.e.Mail" %> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <% MailDao md=new MailDao(); String uname=(String)session.getAttribute("uname"); List<Mail> list=md.getMailByReceiver(uname); %> 欢迎你 <% out.print(uname); %><a href="write.jsp">写邮件</a> <table height="20px" width="100%" align="center" border="1"> <tr> <td>发件人</td> <td>主题</td> <td>状态</td> <td>时间</td> <td>回复</td> <td>删除</td> </tr> <% for(int i=0;i<list.size();i++){%> <tr> <td><%=list.get(i).getUsername()%></td> <td><a href="read.jsp?id=<%=list.get(i).getMsgid()%>"><%=list.get(i).getTitle()%></a></td> <td><%if(list.get(i).getState()==1){ out.println("w"); %> <%}else{ out.println("y"); %> <%} %> </td> <td><%=list.get(i).getMsg_create_date() %></td> <td><a href="write.jsp?reply=<%=list.get(i).getUsername()%>">回复</a></td> <td><a href="deltServlet?id=<%=list.get(i).getMsgid()%>">删除</a></td> </tr> <%} %> </table> </body> </html> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@ page import="com.bk.dog.MailDao" %> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <% String Id = request.getParameter("id"); int msgid = Integer.parseInt(Id); MailDao md = new MailDao(); md.chaK(msgid); out.println(md.modify(msgid)); %> <br> <a href="main.jsp">返回</a> </body> </html> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <script type="text/javascript"> function validate(){ if(resForm.uname.value==""){ alert("账号不能为空!"); return; } if(resForm.upwd.value==""){ alert("密码不能为空!"); return; } resForm.submit(); } </script> <form action="registerServlet"> <b>用户名</b> <input type="text" name="uname" /> <br /> <b>密码</b> <input type="text" name="upwd" /> <br /> <input type="submit" value="注册" /> <a href="log.jsp">登录</a> </form> </body> </html> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <form action="writServelt"> 收件人:<input type="text" name="sendto" value="<%=request.getParameter("reply") %>"><br> 主题: <input type="text" name="title" ><br> 内容 <textarea rows="6" cols="20" name="content"></textarea> <br> <input type="submit" value="发送"> </form> </body> </html> package com.bk.dog; 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?useUnicode=true&characterEncoding=utf8", "root", "jth12345"); } 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 com.bk.dog; 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 com.bk.e.Mail; public class MailDao extends BaseDao{ //添加邮件 public void addMail(Mail m){ Connection conn=getConnection(); String sql="insert into mail(username,title,msgcontent,state,sendto,msg_create_date) values(?,?,?,1,?,?)"; PreparedStatement ps=null; try { ps=conn.prepareStatement(sql); ps.setString(1, m.getUsername()); ps.setString(2, m.getTitle()); ps.setString(3, m.getMsgcontent()); ps.setString(4, m.getSendto()); ps.setDate(5, new java.sql.Date(new Date().getTime())); ps.executeUpdate(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ closeAll(conn, ps, null); } } public static void main(String[] args) { MailDao md=new MailDao(); md.delMail(4); } //删除邮件（根据id） public void delMail(int id){ Connection con=getConnection(); String sql="delete from mail where msgid="+id; PreparedStatement ps=null; try { ps=con.prepareStatement(sql); ps.executeUpdate(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ closeAll(con, ps, null); } } //修改 public Mail chaK(int msgid){ Mail m=null; Connection con=getConnection(); ResultSet rs=null; PreparedStatement ps=null; String sql="select * from msg where msgid=?"; try { ps=con.prepareStatement(sql); ps.setInt(1, msgid); rs=ps.executeQuery(); while(rs.next()){ m=new Mail(); m.setMsgid(rs.getInt("msgid")); m.setUsername(rs.getString("username")); m.setTitle(rs.getString("title")); m.setMsgcontent(rs.getString("msgcontent")); m.setState(rs.getInt("state")); m.setSendto(rs.getString("sendto")); m.setMsg_create_date(rs.getDate("msg_create_date")); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ closeAll(con, ps, rs); } return m; } public int modify(int msgid){ int t=1; Connection con=getConnection(); PreparedStatement ps=null; String sql="update msg set state=1 where msgid=?"; try { ps=con.prepareStatement(sql); ps.setInt(1, msgid); t=ps.executeUpdate(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ closeAll(con, ps, null); } return t; } //查看 public List<Mail> getMailByReceiver(String uname){ List<Mail> list=new ArrayList<Mail>(); Connection con=getConnection(); String sql="select * from mail where sendto=?"; PreparedStatement ps=null; ResultSet rs=null; try { ps = con.prepareStatement(sql); ps.setString(1,uname); rs=ps.executeQuery(); while(rs.next()){ //每读取一行，创建一个对象，对象放到集合中 Mail m=new Mail(); 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; } } package com.bk.dog; 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 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; } public int register(String uname, String upwd) { Connection con = getConnection(); PreparedStatement ps = null; int s = 0; try { String sql = "insert into users(uname,upwd) values(?,?)"; ps = con.prepareStatement(sql); ps.setString(1, uname); ps.setString(2, upwd); s = ps.executeUpdate(); } catch (SQLException e) { e.printStackTrace(); } finally { closeAll(con, ps, null); } return s; } } package com.bk.e; import java.util.Date; public class Mail { private int msgid; private String username; private String title; private String msgcontent; private int state; private String sendto; private 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; } } package com.bk.e; 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; } } package com.sev; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.bk.dog.MailDao; public class deltServlet extends HttpServlet { /** * Constructor of the object. */ public deltServlet() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); int id=Integer.parseInt(request.getParameter("id")); MailDao md=new MailDao(); md.delMail(id); response.sendRedirect("main.jsp"); } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } } package com.sev; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.bk.dog.MailDao; import com.bk.dog.UsersDao; public class logServlet extends HttpServlet { public logServlet() { super(); } public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); String uname=request.getParameter("uname"); String upwd=request.getParameter("upwd"); UsersDao ud=new UsersDao(); MailDao md=new MailDao(); if(ud.login(uname, upwd)){ request.getSession().setAttribute("uname", uname); request.getRequestDispatcher("main.jsp").forward(request, response); }else{ response.setHeader("refresh", "5;url=log.jsp"); } } public void init() throws ServletException { // Put your code here } } package com.sev; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.bk.dog.MailDao; import com.bk.dog.UsersDao; public class registerServlet extends HttpServlet { /** * Constructor of the object. */ public registerServlet() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd"); UsersDao ud=new UsersDao(); MailDao md=new MailDao(); if(ud.register(uname, upwd)>0){ request.getSession().setAttribute("uname", uname); request.getRequestDispatcher("log.jsp").forward(request, response); }else{ response.setHeader("refresh", "3;url=register.jsp"); } } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } } package com.sev; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.bk.dog.MailDao; import com.bk.e.Mail; public class writServelt extends HttpServlet { /** * Constructor of the object. */ public writServelt() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); String uname=request.getParameter("uname"); String title=request.getParameter("title"); String sendto=request.getParameter("sendto"); String content=request.getParameter("content"); Mail m=new Mail(); m.setUsername(uname); m.setSendto(sendto); m.setTitle(title); m.setMsgcontent(content); MailDao md=new MailDao(); md.addMail(m); response.setHeader("refresh", "3;url=main.jsp"); } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } }
