userdao.java

jsp+servlet网上购物,是一个实现mvc的网站

package com.ebook.dao;
import com.ebook.Entity.User;
public interface UserDao {
    public boolean isLogin(User user) throws Exception;
    public boolean isExist(String username) throws Exception;
    public User findUser(String username)throws Exception;
    public void addUser(User user) throws Exception;
}