workgroup.java

一个很有用的电子刊物发布系统

package com.am;

import java.util.*;
import java.sql.*;
import java.text.*;

public class workgroup
{   
    public long ID;    
	public String note;		
	public String fieldName;	
 	public int tag;
    private String strSql;
    private Connection dbConn;
    private int errNum;
    private String errDesc;
    private SimpleDateFormat dateFormatter;

    public void workgroup()
    {       
        ID=0;       
    	note="";   	
    	fieldName="";    	
		tag=0;        
        strSql="";        
        errNum=0;
        errDesc="";
   }
  
   public void add()
   {
        strSql="insert into workgroup ";
        strSql=strSql + "(";        
        strSql=strSql + "note,";       
        strSql=strSql + "fieldName,";       
        strSql=strSql + "tag"; 
        strSql=strSql + ") ";
		strSql=strSql + "values(";		
		strSql=strSql + "'" + note + "',";		
		strSql=strSql + "'" + fieldName + "',";		
		strSql=strSql + "'" + tag + "'";              
		strSql=strSql + ")";   		
		exeSql(strSql);
	
   }

   public void delete()
   {
        strSql="delete from workgroup where ID='";
        strSql=strSql + this.ID + "'";

        exeSql(strSql);

   }  
   
 
   public boolean isExist()
   {
        strSql="select * from `workgroup` ";
		strSql=strSql + " where note='" + this.note + "'";
        try
        {
  			Statement stmt=dbConn.createStatement();
 			ResultSet rs =stmt.executeQuery(strSql);
            if(rs.next())
            {
                this.errNum=0;
                this.errDesc="" ;
                return true;
            }
            else
            {
                this.errNum=-1;
                this.errDesc="the note didn't exist!!";
                return false;

            }

		}
		catch(Exception ex)
		{
            this.errNum=-1;
            this.errDesc=ex.toString();
            return true;

		}
        finally
        {
        }
   }
   
  
   public void updateWorkgroup()
   {
        strSql="update workgroup set";
        strSql=strSql + " note='"+ note + "',";
        strSql=strSql + " fieldName='"+ fieldName + "'";	
        strSql=strSql + " where ID='" + ID + "'";

		exeSql(strSql);
	
   }


  
   public boolean init()
   {
    	strSql="select * from workgroup where ID=";
         strSql=strSql + "'" + this.ID + "'";
        try
		{
   			Statement stmt=dbConn.createStatement();
			ResultSet rs =stmt.executeQuery(strSql);
            if (rs.next())
            {
                ID=rs.getLong("ID");               
                note=rs.getString("note");
                fieldName=rs.getString("fieldName");                     
                tag=rs.getInt("tag");              
                this.errNum=0;
                this.errDesc="";
                return true;
            }
            else
            {
                this.errNum=-1;
                this.errDesc="init faild!";
                return false;

            }

		}
		catch(Exception ex)
		{			
            this.errNum=-1;
            this.errDesc=ex.toString();
            return false;
		}
   }

 
   public void  setConnection(Connection dbConn)
   {
   		this.dbConn=dbConn;
   }
 
   private void exeSql(String strSql)
   {
        Statement stmt=null;
        try
		{
   			stmt=dbConn.createStatement();
			stmt.executeUpdate(strSql);
            this.errNum=0;
            this.errDesc="";
		}
		catch(Exception ex)
		{
			System.out.println(ex.toString());
            this.errNum=-1;
            this.errDesc=ex.toString();

		}
        finally
        {
            stmt=null;
        }
   }

  
    public int getErrNum()
    {
        return errNum;

    }
  
    public String getErrDesc()
    {
        return errDesc;
    }
}