mail_inboxdao.java

这个程序是花了好几十万请人开发的

/**
/**
 * @author 郑文金
 *这个类定义的是 收件箱的数据库访问对象
 * 
 * 
 */
package javabean;
import java.sql.*;
import java.util.Vector;
public class Mail_inboxdao 
{
	public Connection con=null;
	private ResultSet rs;
	private Statement sql;
	private ConnectionPool pool;
	public Mail_inboxdao(Connection con) throws SQLException 
	{
		this.con=con;
	}
	
	public ResultSet query(String s) throws SQLException
	{
		try
		{			
			Statement sql = con.createStatement();
			rs=sql.executeQuery(s);		
		}
		catch(SQLException e)
		{
			System.err.println(e.getMessage());
		}
		return rs;
		
	}
	
	public String  update(String s) throws SQLException
	{
		String msg;
		try
		{
			Statement sql = con.createStatement();
			sql.executeUpdate(s);
			msg="success";
		}
		catch(Exception e)
		{
			System.err.println(e.getMessage());
			msg="failure";
		}
		return msg;
	}
	
			
	public Mail_inbox showdetials(String s) throws SQLException//度曲邮件信息的方法
	{
		Mail_inbox inbox=new Mail_inbox();
		try
		{
			rs=query(s);			
			while(rs.next())
			{
			
				inbox.setID(rs.getInt(1));
				inbox.setTITLE(rs.getString("TITLE"));
				inbox.setCONTENT(rs.getString("CONTENT"));
				inbox.setRNAME(rs.getString("RNAME"));
				inbox.setREADFLAG(rs.getString("READFLAG"));
				inbox.setDATE(rs.getString("DATE"));
				inbox.setUUID(rs.getString("UUID"));
				inbox.setSID(rs.getInt("SID"));	
				inbox.setFID(rs.getInt("FID"));								
			}

		}
		catch(SQLException e)
		{
			System.err.println(e.getMessage());
		}
		return inbox;
	}
	
	public Vector fenyeshow(int code,int pagesize,String str)//显示邮件标题以及实现分页方法的函数
	{
		Vector vec=new Vector();
		int count=pagesize;
		try{
			sql=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
			rs=sql.executeQuery(str);
			rs.absolute((code-1)*pagesize+1);
			while(count>0)
			{
				String title=rs.getString("TITLE").trim();
				if(title.length()>=15)
					title=title.substring(0,15)+"...";
					Mail_inbox inbox=new Mail_inbox();
					inbox.setID(rs.getInt("ID"));
					inbox.setTITLE(title);
					inbox.setCONTENT(rs.getString("CONTENT"));
					inbox.setRNAME(rs.getString("RNAME"));
					inbox.setDATE(rs.getString("DATE"));
					inbox.setSID(rs.getInt("SID"));
					inbox.setUUID(rs.getString("UUID"));	
					inbox.setREADFLAG(rs.getString("READFLAG"));		
					inbox.setFID(rs.getInt("FID"));		   								
					vec.add(inbox);
					count--;
				if(!rs.next())
					break;
			}
			if(rs!=null)
				rs.close();		
		}
		catch(SQLException e){return null;}
		return vec;
	}
}