src/com/dao/jieshaoDao.java

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package com.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;




import com.bean.jieshao;
import com.util.DBO;
import java.util.List;
import java.sql.ResultSet;
public class jieshaoDao {
	private DBO db=null;//
	 private jieshao jieshao=null;
	 public void  insert(jieshao jieshao) throws Exception{//添加介绍
			db=new DBO();
		   db.open();
			
			String sql = "insert into jieshao (bt,nr,sj ) values ('"+jieshao.getBt()+"','"+jieshao.getNr()+"','"+jieshao.getSj()+"')";
		
			
			db.update(sql);
			//db.commit();
			db.close();
		
		}
	 public void  modify(jieshao jieshao) throws Exception{//修改介绍
			db=new DBO();
		   db.open();
			
			String sql = "update jieshao set  bt='"+jieshao.getBt()+"',nr='"+jieshao.getNr()+"',sj='"+jieshao.getSj()+"' where jsid ='"+jieshao.getJsid()+"'";
		
			
			db.update(sql);
			//db.commit();
			db.close();
		
		}
	 public void  delete(String keyid) throws Exception{//删除介绍
			db=new DBO();
		        db.open();
			
			String sql = "delete from jieshao where jsid='"+keyid+"'";
		
			
			db.update(sql);
			//db.commit();
			db.close();
		
		}
	 public ResultSet  qlist(String sl) throws Exception{//查询介绍
		   db=new DBO();
		   db.open();
		   String sql="select * from jieshao where  1=1 ";
		if(!sl.equals("")){
			sql+=sl;
			
		}
		   System.out.println("sql="+sql);