9.12 综合练习

2022-07-24 08:22:17 浏览数 (1)

9.12 综合练习

1.创建管理员表

代码语言：javascript复制
CREATE TABLE Manager(
  username VARCHAR(20) PRIMARY KEY,
  password VARCHAR(20) NOT NULL
)charset=utf8;

2.登录页面

代码语言：javascript复制
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>管理员登录</title>
    </head>
    <body>
    <form action="/WebProject_war_exploded/loginMgr" method="post">
        用户名：<input type="text" name="username"/><br/>
        密码：<input type="password" name="password" /><br/>
        <input type="submit" value="登录">
    </form>
</body>
</html>

3.LoginMgrController

代码语言：javascript复制
package com.qf.servletProject.servlet.controller;

import com.qf.servletProject.entity.Manager;
import com.qf.servletProject.service.ManagerService;
import com.qf.servletProject.service.impl.ManagerServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet(name = "LoginMgrController",value = "/loginMgr")
public class LoginMgrController extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.处理乱码
        request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=utf-8");
        //2.收参
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        //3.调用业务方法
        ManagerService managerService = new ManagerServiceImpl();
        Manager mgr = managerService.login(username,password);
        //4.处理结果，流程跳转
        if(mgr!=null){
            //登录成功
            //将管理员信息存储在Session里
            HttpSession session = request.getSession();
            session.setAttribute("mgr",mgr);
            //跳转  目标、方式
            response.sendRedirect("/WebProject_war_exploded/showallcontroller");
        }else{
            //登录失败
            response.sendRedirect("/WebProject_war_exploded/loginMgr.html");
        }
    }

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

4.ShowAllAdminController

代码语言：javascript复制
package com.qf.servletProject.servlet.controller;

import com.qf.servletProject.entity.Admin;
import com.qf.servletProject.entity.Manager;
import com.qf.servletProject.service.AdminService;
import com.qf.servletProject.service.impl.AdminServiceImpl;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.List;

@WebServlet(value = "/showallcontroller")
public class ShowAllAdminController extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //通过HttpSession完成权限控制
        HttpSession session = req.getSession();
        Manager mgr  =(Manager)session.getAttribute("mgr");
        if(mgr !=null){
            //只负责调用业务逻辑功能
            AdminService adminService = new AdminServiceImpl();

            List<Admin> adminList = adminService.showAllAdmin();

            //request作用域存储数据
            req.setAttribute("admins",adminList);
            //通过转发 跳转到显示结果servlet
            req.getRequestDispatcher("/showalljsp").forward(req,resp);
        }else{
            resp.sendRedirect("/WebProject_war_exploded/loginMgr.html");
        }

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req,resp);
    }
}

9.13 Session实战保存验证码

1.创建验证码

  • 导入ValidateCode.jar
  • 创建生成验证码的Servlet
代码语言：javascript复制
/**
 * Servlet implementation class CreateCode
 * 验证码的生成
 */
@WebServlet("/createcode")
public class CreateCode extends HttpServlet {
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		ValidateCode vc=new ValidateCode(200, 30, 4, 10);
		String code=vc.getCode();
		System.out.println(request.getRemoteAddr() ":生成:" code);
		//使用Session存储生成的验证码
		HttpSession session=request.getSession();
      	session.setAttribute("code",code);
        //响应给客户端
		vc.write(response.getOutputStream());
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}
}

2.登录页面

代码语言：javascript复制
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>管理员登录</title>
    </head>
    <body>
    <form action="/WebProject_war_exploded/loginMgr" method="post">
        用户名：<input type="text" name="username"/><br/>
        密码：<input type="password" name="password" /><br/>
        验证码：<input type="text" name="inputVcode"/> <img src="/WebProject_war_exploded/createcode" /><br/>
        <input type="submit" value="登录">
    </form>
</body>
</html>

3.LoginMgrController

代码语言：javascript复制
package com.qf.servletProject.servlet.controller;

import com.qf.servletProject.entity.Manager;
import com.qf.servletProject.service.ManagerService;
import com.qf.servletProject.service.impl.ManagerServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet(name = "LoginMgrController", value = "/loginMgr")
public class LoginMgrController extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.处理乱码
        request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=utf-8");

        //2.收参
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        String inputVcode = request.getParameter("inputVcode");

        String codes = (String) request.getSession().getAttribute("codes");
        if (!inputVcode.isEmpty() && inputVcode.equalsIgnoreCase(codes)) {

            //3.调用业务方法
            ManagerService managerService = new ManagerServiceImpl();
            Manager mgr = managerService.login(username, password);
            //4.处理结果，流程跳转
            if (mgr != null) {
                //登录成功
                //将管理员信息存储在Session里
                HttpSession session = request.getSession();
                session.setAttribute("mgr", mgr);
                //跳转  目标、方式
                response.sendRedirect("/WebProject_war_exploded/showallcontroller");
            } else {
                //登录失败
                response.sendRedirect("/WebProject_war_exploded/loginMgr.html");
            }
        }else{
            response.sendRedirect("/WebProject_war_exploded/loginMgr.html");
        }

    }

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

验证码

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