第十周--邮件系统全套（第二版）

package cn;

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





public class MailDao {

	/**
	 * @param args
	 */
	 
		   public List<Mail> getSelect(String recive){
			 List<Mail> list=new ArrayList<Mail>();
				Connection con=null;
				PreparedStatement st=null;
				ResultSet rst=null;
				try{
					con=JDBCUtils.getCon();
					
					String sql="select*from mail where recive=?";
					st=con.prepareStatement(sql);
					st.setString(1, recive);
					
					rst=st.executeQuery();
					while(rst.next()){
						Mail mm=new Mail();
						mm.setIds(rst.getInt("ids"));
						mm.setSender(rst.getString("sender"));
						mm.setTitle(rst.getString("title"));
						mm.setContent(rst.getString("content"));
						mm.setRecive(rst.getString("recive"));
						mm.setDate(rst.getString("date"));
						mm.setState(rst.getInt("state"));
						list.add(mm);
					}
					
					return list;  
					
				}catch(Exception e){
					throw new RuntimeException(e);
				}
			 finally{
				 JDBCUtils.closeAll(rst, st, con);
			 }
		   }
		   
		   //添加
	            public boolean insert(Mail mail){
	            	Connection con=null;
					Statement st=null;
					ResultSet rst=null;
	               try{
	            	   con=JDBCUtils.getCon();
	            	   
	            	   st=con.createStatement();
	            	   
	            	
	            	   
	            	    int row=st.executeUpdate("insert into mail values('"+mail.getIds()+"','"+mail.getSender()+"','"+mail.getTitle()+"','"+mail.getContent()+"','"+mail.getRecive()+"','"+mail.getDate()+"','"+mail.getState()+"'"+")");
	            	    
	            	    if(row==1){
	            	    	return true;
	            	    }
	            	   
	               }catch(Exception e){
						throw new RuntimeException(e);
					}
				 finally{
					 JDBCUtils.closeAll(rst, st, con);
				 }
	            	return false;
	            }
	   //根据id查询内容                  
	            public Mail getSelects(int ids){
	   		
	   				Connection con=null;
	   				PreparedStatement st=null;
	   				ResultSet rst=null;
	   				try{
	   					con=JDBCUtils.getCon();
	   					
	   					String sql="select*from mail where ids=? ";
	   					
	   					st=con.prepareStatement(sql);
	   					
	   					st.setInt(1, ids);
	   				
	   					rst=st.executeQuery();
	   					
	   					while(rst.next()){
	   						Mail mm=new Mail();
	   						mm.setIds(rst.getInt("ids"));
	   						mm.setSender(rst.getString("sender"));
	   						mm.setTitle(rst.getString("title"));
	   						mm.setContent(rst.getString("content"));
	   						mm.setRecive(rst.getString("recive"));
	   						mm.setDate(rst.getString("date"));
	   						mm.setState(rst.getInt("state"));
	   						return mm;
	   					}
	   					
	   					
	   					
	   				}catch(Exception e){
	   					throw new RuntimeException(e);
	   				}
	   			 finally{
	   				 JDBCUtils.closeAll(rst, st, con);
	   			 }
					return null;
	   		   }
	   		   
	            
	            
	  //根据id改变已读 图标         
	      public boolean getChange(int ids){
	    	  Connection con=null;
 				PreparedStatement st=null;
 				ResultSet rst=null;
 				try{
 					con=JDBCUtils.getCon();
 					String sql="update mail set state=1 where ids=?";
 					st=con.prepareStatement(sql);
 					
 					st.setInt(1, ids);
 					
 					int row =st.executeUpdate();
 					if(row==1){
 						return true;
 					}
 				
 					
 				}catch(Exception e){
   					throw new RuntimeException(e);
   				}
   			 finally{
   				 JDBCUtils.closeAll(rst, st, con);
   			 }
	    	  
	    	  return false;
	      }
	            
	            
	            
	            
	            
	//    删除根据id
	       public boolean getDelete(int ids){
	    	   Connection con=null;
				PreparedStatement st=null;
				ResultSet rst=null;
	    	   
				try{
 					con=JDBCUtils.getCon();
 					String sql="delete from mail where ids=?";
 					st=con.prepareStatement(sql);
 					
 					st.setInt(1, ids);
 					
 					int row =st.executeUpdate();
 					if(row==1){
 						return true;
 					}
 				
 					
 				}catch(Exception e){
   					throw new RuntimeException(e);
   				}
   			 finally{
   				 JDBCUtils.closeAll(rst, st, con);
   			 }
	    	  
	    	  return false;
	      }
	            
	            
	            
	            
	            
	            
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		
	}

}

　　

package cn;

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


public class UsDao {
           
	
	public boolean getLogin(String zzhh,String mima){
		Connection con=null;
		PreparedStatement st=null;
		ResultSet rst=null;
		
		try{
			con=JDBCUtils.getCon();
			
			
			
			String sql="select*from us where zzhh=? and mima=?";
			
			st=con.prepareStatement(sql);
			st.setString(1, zzhh);
			st.setString(2, mima);
			
			rst=st.executeQuery();
			
			if(rst.next()){
				return true;
			}
			
			
			
			
			
			
		}catch(Exception e){
			throw new RuntimeException(e);
		}
		finally{
		   JDBCUtils.closeAll(rst, st, con);
		}
		
		
		return false;
	}
	
	
	
	
	
	
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
//          UsDao d=new UsDao();
//          
//         System.out.println(d.getLogin("Lisa","123456")); 
		
	}

}

　　

 
  <body>
   <form action="dologin.jsp" method="post">
            账号:<input type="text" name="username"> <br> <br>
            密码: <input type="text" name="password">    <br>  <br>
            <input type="submit" value="登录">
    </form>
  </body>
</html>

　　

<body>
           <%
             String username=request.getParameter("username");
              session.setAttribute("username", username);
              String password=request.getParameter("password");
              UsDao d=new UsDao();
              
             if(d.getLogin(username, password)){
                request.getRequestDispatcher("main.jsp").forward(request, response);
              }else{
              response.sendRedirect("login.jsp");
              }
            %>
            
  </body>

　　

<body>
       <%
       String username=(String)session.getAttribute("username");
        %>
    <h3>发件人:<%=username %></h3>
          <form action="add2.jsp" method="post">
    send to:<input type="text" name="res"><br><br>     
         标题: <input type="text" name="title"><br><br>
         内容:  <input type="text" name="content"><br><br>
           
           <input type="submit" value="发送" >
          
          </form>
  </body>

　　

<body>
        
     <%
     request.setCharacterEncoding("utf-8");
     String username=(String)session.getAttribute("username");
     String title=request.getParameter("title");
     String content=request.getParameter("content");
     String res=request.getParameter("res");
           MailDao d=new MailDao();
             Mail m=new Mail();
             
       
           
          
          
            m.setSender(username);
            m.setTitle(title);
            m.setContent(conte
            m.setRecive(res);
            m.setDate("20200507");
            m.setState(0);
            d.insert(m);

<body>
    <% 
 
     request.setCharacterEncoding("utf-8");
    int id=Integer.parseInt(request.getParameter("titles"));
    
    
     %>
     
    <%   
           MailDao dd=new MailDao();
           dd.getChange(id);
           Mail m=dd.getSelects(id);
      
        
         
     %>
          
   
   
    <br>
     来自于: <%=m.getSender() %>
     <br><br>
    标题:  <%=m.getTitle() %>
     <br><br>
    内容: <%=m.getContent() %>
    <br><br>
  时间:<%=m.getDate() %>
    <br><br>
  
  <a href="main.jsp">返回</a>
  
  
  

  </body>

　　

<body>
       
           <%
      String sds=request.getParameter("sds");
         session.setAttribute("key", sds);
      %>

<form action="doreturn.jsp" method="post">
     收件人: <%=sds %>
     <br> <br>
     标 题: <input type="text" name="tt">
     <br> <br>
     内容: <input type="text" name="cc">
     <br> <br>
     <input type="submit" value="发送">
     <a href="main.jsp">返回</a>
     </form>
     
     
     
     
  </body>

　　

 <body>
          <%
          request.setCharacterEncoding("utf-8");
          String username=(String)session.getAttribute("username");
             String sds=(String)session.getAttribute("key");
            String tt=request.getParameter("tt");
            String cc=request.getParameter("cc");
            
            MailDao md=new MailDao();
            
            Mail mm=new Mail();
            
            mm.setSender(username);
            mm.setTitle(tt);
            mm.setContent(cc);
            mm.setRecive(sds);
            mm.setDate("20200801");
            mm.setState(0);
            
            md.insert(mm);
            
            request.getRequestDispatcher("return.jsp").forward(request,response);
            
            
           %>
          
  </body>

　　

 <body>
          <%
          request.setCharacterEncoding("utf-8");
          String username=(String)session.getAttribute("username");
             String sds=(String)session.getAttribute("key");
            String tt=request.getParameter("tt");
            String cc=request.getParameter("cc");
            
            MailDao md=new MailDao();
            
            Mail mm=new Mail();
            
            mm.setSender(username);
            mm.setTitle(tt);
            mm.setContent(cc);
            mm.setRecive(sds);
            mm.setDate("20200801");
            mm.setState(0);
            
            md.insert(mm);
            
            request.getRequestDispatcher("return.jsp").forward(request,response);
            
            
           %>
          
  </body>

　　

request.getRequestDispatcher("login.jsp").forward(request, response); %