userservice.java

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package sample.portlet.service;

import java.util.Collection;

import sample.portlet.domain.User;

public interface UserService {
	
	User insertUser(String username, String password);
	
	void updateUser(Long userId, String username, String password);
	
	void updateUser(User user);

	void removeUser(Long userId);
	
	Collection findAllUser();
	
	User getUserByUserId(Long userId);
	
	User getUserByUsername(String username);

}