package myshop.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.*;

/**
 * 處理用戶登錄的認(rèn)證和根據(jù)認(rèn)證結(jié)果重新定向用戶
 */
public class ServletLogin extends HttpServlet {

  // 僅處理 HTTP Get 請(qǐng)求
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws
    ServletException, IOException {
    process(request, response);
  }

  // 僅處理 HTTP Post 請(qǐng)求
  public void doPost(HttpServletRequest request, HttpServletResponse response) throws
    ServletException, IOException {
    process(request, response);
  }

  // 統(tǒng)一處理 Get 和 Post 方式請(qǐng)求
  private void process(HttpServletRequest request, HttpServletResponse response) throws
    ServletException, IOException {
    String username = request.getParameter("username"); //獲得提交用戶名參數(shù)的值
    String password = request.getParameter("password"); //獲得提交密碼參數(shù)的值
    if(username !=null && password!=null && //用戶名密碼都不能為空
       "admin".equals(username) && //用戶名是“admin”
       "111111".equals(password)) { //密碼是“111111”
      response.sendRedirect("/maintain/main.jsp"); //重訂向用戶到功能頁(yè)面
      return; //結(jié)束判定流程
    } else {
      response.sendRedirect("/maintain/index.jsp"); //重訂向用戶到登陸頁(yè)面
      return; //結(jié)束判定流程
    }
  }
}