speciality.java

教材管理系统,一个完整的学校教材管理系统,可以作为大学生课程设计使用

package tom.bean;
import java.sql.*;
import java.util.*;
import tom.bean.Dbconnection;
public class Speciality{
	 private String action;
     private int specialityid;
     private String specialityname;
     private String condition;
     private ResultSet rs;
     private int rowcount;
     private String message;
     private int id;
     public Speciality() {
     	specialityid=0;
     	specialityname=null;
     	message=null;
    }
    
    //
    public void setAction(String s)
    {
    	action=s;
    }
    //
    public void setSpecialityid(int n)
    {
    	specialityid=n;
    }
    public int getSpecialityid()
    {
    	return specialityid;
    }
    //
    public void setSpecialityname(String s)
    {
    	specialityname=s;
    }
    public String getSpecialityname()
    {
    	return specialityname;
    }
    //
    public void setId(int n)
    {
    	id=n;
    }
    public int getId()
    {
    	return id;
    }
    public String getMessage()
    {
    	return message;
    }
    //
    public int getRowcount()
    {
    	return rowcount;
    }
    //
    public ResultSet specialitylist()
    {
    	condition="SELECT * from speciality order by specialityid";
    	Dbconnection e=new Dbconnection();
        e.condb();
    	rs=e.select(condition);
    	rowcount=e.getRowcount();
        message=e.getMessage();
    	return rs;
    }
    //
    public void selectspec()
    {
    	condition="SELECT * from speciality where specialityid="+specialityid;
    	Dbconnection e=new Dbconnection();
        e.condb();
    	rs=e.select(condition);
    	try{
    		rs.next();
    		specialityid=rs.getInt(1);
    		specialityname=rs.getString(2);
    		message=e.getMessage();
    	}
    	catch(SQLException f){message="error";}
    }
    public void ManageSpeciality()
    {
    	if(action.equals("add"))
    	condition="INSERT INTO speciality VALUES"+"("+specialityid+","+"'"+specialityname+"')";
        if(action.equals("edit"))
        condition="update speciality set specialityid="+specialityid+",specialityname='"+specialityname+"' where specialityid="+id;
        if(action.equals("delete"))
        condition="DELETE FROM speciality WHERE specialityid="+specialityid; 
        Dbconnection e=new Dbconnection();	
        e.condb();
    	e.update(condition);
        message=e.getMessage();
    	  	
    }
    public static void main(String args[])
    {
    	Speciality e=new Speciality();
    	e.setAction("edit");
    	e.setId(3);
    	e.setSpecialityid(3);
    	e.setSpecialityname("电子");
    	e.ManageSpeciality();
    	String s=e.getMessage();
    	System.out.print(s);
    }
}