import HttpSerlvet.HttpServlet;
import javafx.scene.control.Pagination;import java.io.*;
import java.lang.*;
import java.util.*;
import java.io.IOException;//所要导入的包文件
import javax.servlet.*;
import javax.servlet.http.*;/*** Created by babyblue on 2015/5/29.*/
public class CustomerServlet extends HttpServlet {//在Servlet中默认情况下，无论是get还是post提交过来，都会经过servlet()方法来处理，然后转向到doGet或是doPost方法，我们可以查看HttpSerlvet类的servlet方法public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {//doGet方法this.doPost(request, response);//调用doPost方法
    }public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {request.setCharacterEncoding("GB2312");//设置请求的编码为GB2312,设置对请求中的中文进行处理。response.setCharacterEncoding("GB2312");//设置响应的编码为GB2312，对传到响应页面的中文进行处理。response.setContentType("text/html;charset=GB2312");//设置响应页面的编码格式，对传到响应页面的中文进行处理。HttpSession session = request.getSession(true);//拿到session对象，session对象主要用于保存用户各种信息，得到JSP端的Session对象，得到该对象后，就可以对其中存放的对象进行操作，也可以将某个对象放入里面。PrintWriter out = response.getWriter();//拿到输出流对象，即是构造出一个标准输出流，把想要表达的内容传输到页面上，通常接着会有：out.println("内容");PaginationBean handlePage = (PaginationBean) session.getAttribute("handlePage");//PaginationBean用来做业务，负责处理客户端发送的请求//javaBean在MVC设计模型中是model，又称模型层，在一般的程序中，我们称它为数据层，就是用来设置数据的属性和一些行为，然后我会提供获取属性和设置属性的get/set方法
 if (handlePage == null) {//如果JavaBean为空将声明新的JavaBeanhandlePage = new PaginationBean();String handlePage1 = null;session.setAttribute("handlePage", handlePage1);//将声明的JavaBean放进session
        }String action = request.getParameter("action");//获得请求动作，当得到动作后就可以根据动作的不同来实现不同的功能。if (action == null) {return;}if (action.equals("denglu")) {//如果action为"denglu"String zname = request.getParameter("zname");//得到用户名String zpassword = request.getParameter("zpassword");//将用户密码转码String cname = new String(zname.getBytes(), "ISO-8859-1");String sql = "select cname from gcustomer where cname='" + cname + "'and cpw='" + zpassword + "'";//给出了从表中查询相关用户信息的SQL语句，根据这句SQL就可以调用selectMsg()方法进行查询。如果验证结果为true，将进行页面跳转。boolean s = DB.selectMsg(sql);//调用selectMsg()方法if (s) {//结果为真的情况session.setAttribute("user", zname);//将用户名放进sessionString fromWhere = (String) session.getAttribute("fromWhere");//从session中取出标志位if (fromWhere != null) {if (fromWhere.equals("jz")) {//回结账页this.getServletContext().getRequestDispatcher("/CustomerServlet?action=jiezhang").forward(request, response);//页面跳转return;} else if (fromWhere.equals("wddd")) {//回”我的订单“页this.getServletContext().getRequestDispatcher("/CustomerServlet?action=modify2").forward(request, response);//页面跳转return;} else if (fromWhere.equals("mmcz")) {//回”密码重置“页this.getServletContext().getRequestDispatcher("/customerpwchang.jsp").forward(request, response);//页面跳转return;}}this.getServletContext().getRequestDispatcher("/pagination.jsp").forward(request, response);//页面跳转} else {String msg1 = "对不起，登录失败，请重新登录！！！";//页面跳转提示信息request.setAttribute("msg", msg1);//当用户在客户端输入用户名或密码错误的时候，当时的页面会显示“对不起，登录失败，请重新登录！！！！”this.getServletContext().getRequestDispatcher("/customermanage.jsp").forward(request, response);//页面跳转到error页并显示提示信息
            }}}private void getServletContext() {//getServletContext()方法
 }private class HttpServletRequest {//HttpServletRequest类private String characterEncoding;//声明characterEncodingprivate String contentType;//声明contentType
 public HttpSession getSession(boolean b) {//HttpSession getSession()方法return null;}public String getParameter(String action) {//getParameter()方法return null;}public void setAttribute(String msg, String msg1) {//getParameter()方法
  }
public void setCharacterEncoding(String characterEncoding) {//setCharacterEncoding()方法this.characterEncoding = characterEncoding;}public String getCharacterEncoding() {return characterEncoding;}}public void setCharacterEncoding(String gb2312) {}private class HttpServletResponse {public PrintWriter getWriter() {return null;}public void setCharacterEncoding(String gb2312) {}public void setContentType(String s) {}}private class ServletException extends Exception {}private class HttpSession {public void setAttribute(String handlePage, String handlePage1) {}public String getAttribute(String handlePage) {return handlePage;}}private class PaginationBean {}
}