save.java

一个论坛小程序,虽然很小,但几乎包括了论坛的所有功能

package save1;
import java.io.*;
import java.sql.*;
import java.util.Date;

public class save
{
	Connection con;
	public save()
	{
		String classforname="com.microsoft.jdbc.sqlserver.SQLServerDriver";
		String serveraddb="jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=luntan";
		String user="sa";
		String pwd="sa";
		try
		{
			Class.forName(classforname);
			con=DriverManager.getConnection(serveraddb,user,pwd);
		}catch(Exception e)
		{e.printStackTrace();}	
	}
	public ResultSet findnum(String name)
	{
		try
		{
			Statement stm=con.createStatement();
			ResultSet rest=stm.executeQuery("select * from luntan where title='"+name+"'");
			return rest;
		}catch(Exception e)
		{}
		return null;
	}
	public void createfile(String name)
	{
		try
		{
		File file=new File(name+".txt");
		if(!file.exists())
		{
			file.createNewFile();
		}
		}catch(Exception e)
		{}
	}
	public void adddata(String title,String author,String email)throws Exception
	{
		try
		{
			Date date=new Date();
			int mouth=date.getMonth()+1;
			int year=date.getYear()+1900;
			int day=date.getDate();
			PreparedStatement pstmt=con.prepareStatement("insert into luntan values(?,?,?,?)");
			pstmt.setString(1,title);
			pstmt.setString(2,author);
			pstmt.setString(3,""+year+"-"+mouth+"-"+day);
			pstmt.setString(4,email);
			pstmt.execute();
		}catch(Exception e)
		{}
	}
	public void updatedata(String id,String title,String author,String email)
	{
		try
		{
			Date date=new Date();
			int mouth=date.getMonth()+1;
			int year=date.getYear()+1900;
			int day=date.getDate();
			String date1=""+year+"-"+mouth+"-"+day;
			Statement stm=con.createStatement();
			int i=stm.executeUpdate("update luntan set title='"+title+"',author='"+author+"',email='"+email+"',date='"+date1+"' where title='"+id+"'");
			stm.close();
		}catch(Exception e)
		{}
	}
	public String deletenum(String title)
	{
		String str="a";		 
		try
		{
			//String nameq=name;
			Statement stm=con.createStatement();
			str="abc";
			
			stm.execute("delete  from luntan where title='"+title+"'");
			
			stm.close();
			return str;
			
			
		}catch(Exception e)
		{}
		return str;
	}
}