userdaoimpl.java

数据库连接包括连接池。很有用的资料

package org.appfuse.dao;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.appfuse.model.User;

public class UserDAOImpl implements UserDAO {
	
  private static Log log = LogFactory.getLog(UserDAOImpl.class);
	
  private UserDAO userDAO;
	
  public void setUserDAO(UserDAO userDAO) {
    this.userDAO = userDAO;
  }

  public List getUsers() {
    return userDAO.getUsers();
  }

  public User getUser(Long userId) {
    User user = userDAO.getUser(userId);

    if (user == null) {
    log.warn("UserId '" + userId + "' not found in database.");
    }
    return user;
  }

  public void saveUser(User user) {
    userDAO.saveUser(user);
  }

  public void removeUser(Long userId) {
    userDAO.removeUser(userId);
  }
}