contactpersonservlet.java

运用JSP/servlet/JavaBean 技术

package com.lovo.controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.lovo.po.ContactPerson;
import com.lovo.po.ContactPersonVo;
import com.lovo.service.IContactPersonBo;
import com.lovo.service.IContactPersonBoImpl;
import com.lovo.service.IUserBo;
import com.lovo.service.IUserBoImpl;

public class ContactPersonServlet extends HttpServlet
{
	/** IContactPersonBo接口，用于调用业务方法 */
	private IContactPersonBo contactPersonBo = new IContactPersonBoImpl();
	private IUserBo userBo = new IUserBoImpl();

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{
		/** 设置响应头，让浏览器不缓存信息 */
		response.setHeader("Cache-control", "no-cache");
		/** 获得操作指示 */
		String flag = request.getParameter("operation");
		/** 获得当前用户userId */
		int userId = Integer.parseInt(request.getParameter("userId"));
		/**
		 * 如果指示信息为load，表示要查询当前用户的所有联系人帐号
		 */
		if(flag.equals("load"))
		{
			/** 设置响应文件类型及字符集编码 */
			response.setContentType("text/xml; charset=utf-8");
			/** 获得当前用户的所有联系人的帐号 */
			List<String> emailNames = 
				contactPersonBo.getContactPersonEmailName(userId);
			/** 获得输出流 */
			PrintWriter writer = response.getWriter();
			/** 构建xml */
			writer.println("<?xml version='1.0' encoding='UTF-8'?>");
			writer.println("<contactperson>");
			for(int i = 0; i < emailNames.size(); i++)
			{
				writer.println(
						"<emailname>" + emailNames.get(i) + "</emailname>");
			}
			writer.println("</contactperson>");
			writer.flush();
		}
		/**
		 * 如果指示信息为add，表示要添加联系人
		 */
		if(flag.equals("add"))
		{
			/** 设置响应文件类型及字符集编码 */
			response.setContentType("text/html; charset=utf-8");
			/** 获得输出流 */
			PrintWriter writer = response.getWriter();
			String nickname  = request.getParameter("nickname");
			String emailName = request.getParameter("emailName");
			int exist = userBo.isEmailNameExist(emailName);
			if(exist == -1)
			{
				writer.println("帐号不存在，不能添加！");
				return;
			}
			boolean b = contactPersonBo.isContactPersonIdExist(exist, userId);
			if(b)
			{
				writer.println("联系人已经存在，不能添加！");
				return;
			}
			ContactPerson contactPerson = new ContactPerson();
			contactPerson.setContactId(exist);
			contactPerson.setNickname(nickname);
			contactPerson.setUserId(userId);
			if(contactPersonBo.addContactPerson(contactPerson))
			{
				writer.println("添加成功！");
			}
			else
			{
				writer.println("添加失败！");
			}
		}
		if(flag.equals("list"))
		{
			/** 设置响应文件类型及字符集编码 */
			response.setContentType("text/xml; charset=utf-8");
			List<ContactPersonVo> vos = contactPersonBo.listContactPerson(userId);
			ContactPersonVo temp = null;
			/** 获得输出流 */
			PrintWriter writer = response.getWriter();
			/** 构建xml */
			writer.println("<?xml version='1.0' encoding='UTF-8'?>");
			writer.println("<contactperson>");
			for(int i = 0; i < vos.size(); i++)
			{
				temp = vos.get(i);
				writer.println("<person>");
				writer.println("<nickname>" + temp.getNickname() + "</nickname>");
				writer.println("<emailname>" + temp.getEmailName() + "</emailname>");
				writer.println("</person>");
			}
			writer.println("</contactperson>");
			writer.flush();
		}
		if(flag.equals("delete"))
		{
			/** 设置响应文件类型及字符集编码 */
			response.setContentType("text/html; charset=utf-8");
			String names = request.getParameter("emailNames");
			String[] emailNames = names.split(",");
			int len = emailNames.length;
			int temp = 0;
			for(int i = 0; i < len; i++)
			{
				temp = userBo.isEmailNameExist(emailNames[i]);
				contactPersonBo.deleteContactPerson(temp, userId);
			}
			/** 获得输出流 */
			PrintWriter writer = response.getWriter();
			writer.println("联系人已删除！");
			writer.flush();
		}
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{
		doGet(request, response);
	}

}