employeeservice.java

用ejb3.0和jsf实现一个简单的页面 保证实用

/**
 * ClassName: EmployeeService.java
 * Author: qiujy
 * CreateTime: Feb 20, 2008
 * 
 * Copyright 2007-2008 ++YONG All rights reserved.
 * EMail: [e-mail]
 */
package org.qiujy.service;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import org.qiujy.ejb3.dao.EmployeeDao;
import org.qiujy.ejb3.entity.Employee;
import org.qiujy.vo.EmployeeVO;

/**
 * 员工业务逻辑类
 * 
 * @author qiujy
 * @version 1.0
 */
public class EmployeeService {
	
	private EmployeeDao employeeDao;

	public EmployeeService() {
		try {
			Properties props = new Properties();
			// 设置Jboss服务器的JNDI驱动的类名
			props.setProperty(Context.INITIAL_CONTEXT_FACTORY,
					"org.jnp.interfaces.NamingContextFactory");
			// 设置Jboss服务器提供命名服务的URL
			props.setProperty(Context.PROVIDER_URL, "localhost:1099");
			InitialContext ctx = new InitialContext(props);

			// looking up SessionBean
			employeeDao = (EmployeeDao) ctx.lookup("EmployeeDaoImpl/remote");

		} catch (NamingException e) {
			e.printStackTrace();
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}
	
	/**
	 * 新增员工
	 * 
	 * @param employee
	 */
	public void add(EmployeeVO employee){
		employeeDao.persist(employee.getPO());
	}

	/**
	 * 删除员工
	 * 
	 * @param employee
	 */
	public void delete(EmployeeVO employee){
		employeeDao.delete(employee.getPO());
	}

	/**
	 * 更新员工信息
	 * 
	 * @param employee
	 */
	public void update(EmployeeVO employee){
		employeeDao.update(employee.getPO());
	}

	/**
	 * 得到所有的员工列表
	 * 
	 * @return
	 */
	public List<EmployeeVO> findAllEmployees(){
		List<EmployeeVO> result = new ArrayList<EmployeeVO>();

		List<Employee> list = employeeDao.findAllEmployees();
		int size = list == null ? 0 : list.size();
		for (int i = 0; i < size; i++) {
			result.add(new EmployeeVO(list.get(i)));
		}
		
		return result;
	}

	/**
	 * 根据ID得到该员工
	 * 
	 * @param id
	 * @return
	 */
	public EmployeeVO findEmployee(Integer id){
		Employee empl = employeeDao.findEmployee(id);
		return (empl == null ? null : new EmployeeVO(empl));
	}

}