QueryContactServlet.java

package com.rlovep.contact.jspservlet;

import com.rlovep.contact.entity.Contact;
import com.rlovep.contacrt.service.ContactService;
import com.rlovep.contacrt.service.impl.ContactServiceImpl;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * 修改前查询联系人的逻辑
 * @author APPle
 *
 */
@WebServlet("/QueryContactServlet")
public class QueryContactServlet extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//1.接收id
		String id = request.getParameter("id");
		
		//2.调用service根据id查询联系人的方法
		ContactService service = new ContactServiceImpl();
		Contact contact = service.findById(id);
		
		//3.把查询的结果保存到request域中
		request.setAttribute("contact", contact);
		
		//4.跳转到修改联系人的页面
		request.getRequestDispatcher("/updateContact.jsp").forward(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

}