src/com/dao/kehuDao.java

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




import com.bean.kehu;
import com.util.DBO;
import java.util.List;
import java.sql.ResultSet;
public class kehuDao {
	private DBO db=null;//
	 private kehu kehu=null;
	 public void  insert(kehu kehu) throws Exception{//添加客户
			db=new DBO();
		   db.open();
			
			String sql = "insert into kehu (kh,lxdh,lxdz,yx ) values ('"+kehu.getKh()+"','"+kehu.getLxdh()+"','"+kehu.getLxdz()+"','"+kehu.getYx()+"')";
		
			
			db.update(sql);
			//db.commit();
			db.close();
		
		}
	 public void  modify(kehu kehu) throws Exception{//修改客户
			db=new DBO();
		   db.open();
			
			String sql = "update kehu set  kh='"+kehu.getKh()+"',lxdh='"+kehu.getLxdh()+"',lxdz='"+kehu.getLxdz()+"',yx='"+kehu.getYx()+"' where khid ='"+kehu.getKhid()+"'";
		
			
			db.update(sql);
			//db.commit();
			db.close();
		
		}
	 public void  delete(String keyid) throws Exception{//删除客户
			db=new DBO();
		        db.open();
			
			String sql = "delete from kehu where khid='"+keyid+"'";
		
			
			db.update(sql);
			//db.commit();
			db.close();
		
		}
	 public ResultSet  qlist(String sl) throws Exception{//查询客户
		   db=new DBO();
		   db.open();
		   String sql="select * from kehu where  1=1 ";
		if(!sl.equals("")){
			sql+=sl;
			
		}
		   System.out.println("sql="+sql);