chengjidao.java

学习 java 做 的一些 小 试验。。。。。。。可以

package com.wczy.dao;

import java.util.ArrayList;

import com.wczy.pojo.Chengji;

public interface ChengjiDao {
	 public ArrayList select(String sql);
	 public boolean isAddOk(Chengji chengji);
	 public boolean update(Chengji chengji);
	 public boolean delete(Chengji chengji);

}