deletecourse.java

网上选课系统

package student;
import java.io.*;
import java.text.*;
import java.util.*;
import java.sql.*; 
import java.net.*;
public class DeleteCourse{
	private String[] ID;
	private String SID;
	private String semester;
	private int se=1;
	Connection con=null;
	
	public void setID(String[] ID){
	    this.ID=ID;
	}
	
	public void setSID(String SID){
		this.SID=SID;
	}
	
	public void setSemester(String semester){
		this.semester=semester;
	}
	
	public int getDelete(){
		String sql;
		try{
			String ss=getClass().getResource("/").getPath();
            String ss1=ss.substring(1).replace("%20"," ");
            URL str=getClass().getResource("/");
		
		    String s=str.toString();
            String url0=s.substring(6);
            String url=url0.replace("%20"," ");
		
		    String constr="jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};"+
    "DBQ="+url+"/data/system";
    
			Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
	        con = DriverManager.getConnection(constr);
	        Statement smt = con.createStatement();
	        for(int i=0;i<ID.length;i++)
	        {
	           sql="delete from Student_Course where S_ID='"+SID+"' and C_ID="+Integer.parseInt(ID[i])+" and semester='"+semester+"'";
	           se=smt.executeUpdate(sql);    
	        }
		}
		catch(SQLException e)
		{
			se=1;
		}	
		finally{
			return se;
		}    
	}
	
		public void Close(){
		try{
			con.close();
		}
		catch(Exception e){
			
		}
	}
}