retrieveusersutil.java

主要是航空预订系统

/**
 * 
 */
package com.air.backend.util;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.air.exceptions.AirException;
import com.air.model.Fight;
import com.air.model.LoginUser;
import com.air.persistence.DataSrcUtil;
import com.air.persistence.IsqlDataSource;
import com.air.util.ValHelper;

/**
 * @author jelly_yang
 *
 */
public class RetrieveUsersUtil {

	private static Log log = LogFactory.getLog(RetrieveUsersUtil.class);
	private RetrieveUsersUtil() {
		// TODO Auto-generated constructor stub
	}

	public static class RetrieveUsersUtilHolder{
		static RetrieveUsersUtil retrieveUsersUtil = new RetrieveUsersUtil();
	}
	
	public static RetrieveUsersUtil getInstance(){
		return RetrieveUsersUtilHolder.retrieveUsersUtil;
	}
	
	public List<LoginUser> getUsers()throws AirException{
		List<LoginUser> list = new ArrayList<LoginUser>();
		List<Map<String,String>> result = new ArrayList<Map<String,String>>();
		String sSql = "select * from users";
       
		IsqlDataSource src = DataSrcUtil.getInstance().getDataSource();
		Connection conn = null;
		log.debug("retrieveFight() -- sSql["+ sSql+ "]");
		try
		{
			conn = src.getConnection();
			result = src.executeRetrieve(conn, sSql);
		}
		catch(SQLException se)
		{
			log.error("getUsers() caught SQLException: " + se);
		}
		catch(Exception ex)
		{
			log.error("getUsers() caught Exception: " + ex);
		}
		finally
		{
			src.closeConn(conn);
		}
		if(!result.isEmpty())
		{
			int size = result.size();
			
			for( int i=0;i<size;i++)
			{
				Map<String,String> resultMap = result.get(i);
				String username = ValHelper.getInstance().getValue(resultMap, "username");
				String name = ValHelper.getInstance().getValue(resultMap, "name");
				String sex = ValHelper.getInstance().getValue(resultMap, "sex");
				
				LoginUser user = new LoginUser();
				user.setUsername(username);
				user.setName(name);
				user.setSex(sex);
	
			    list.add( user );
			}
		}
		return list;
	}
}