Chat/src/main/java/com/example/chat/dao/UserMapper.java

package com.example.chat.dao;

import com.example.chat.entity.User;
import org.springframework.stereotype.Repository;

import java.io.IOException;
@Repository
public interface UserMapper {
    public abstract void addUser(User user) throws IOException;

    public abstract void delUser(User user);

    public abstract void updateUser(User oldUser,User newUser);

    public abstract User getUser(User user) throws IOException;
    public abstract User emailCheck(User user) throws IOException;
}