2022年Servlect课时十八——综合案例一-阿里云开发者社区

二个案例采用了Servlect,Filter,Listener。

运行结果图

创建项目如上图所示

代码：

package com.DengLu.And.Zhu.Ce;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Random;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * Servlet implementation class ServlectDengLuLose
 */
@WebServlet("/ServlectDengLuLose")
public class DengLuChengGong extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public DengLuChengGong() {
        super();
        // TODO Auto-generated constructor stub
    }
  /**
  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  response.setCharacterEncoding("UTF-8");
  response.setContentType("text/html");
  response.setHeader("refresh", "5");
  //设置要求浏览器 
  /* response.sendRedirect("Servlet1"); */
  int i=(int)(Math.random()*900000+100000);
  int a=(int)(Math.random()*9000+1000);
  int c=(int)(Math.random()*900+100);
  System.out.println("@@@@"+(new Random().nextInt(900000)+100000));
  /*
   * 设置随机
   */
  System.out.println(new Random().nextInt(100));
  System.out.println(Math.random());
  PrintWriter  pw =response.getWriter();
  pw.print("你的支付宝到账1000万元，需要的码号为:<h1 style='color:red ;background-color:green'>"+i+"</h1>,打死也不说  \"<hr>\";");
  pw.print("你的QQ到账1000万元，需要的码号为:<h2 style='color:red ;background-color:green'>"+c+"</h2>,打死也不说  \"<hr>\";");
  pw.print("你的微信到账1000万元，需要的码号为:<span style='color:green'>"+a+"</span>,打死也不说"); 
  pw.print("你的手机支付宝到账1000万<span style='color :red'>"+i+"</span>");
  pw.append("<style>");
  pw.append(" *{\r\n" + 
    "            margin: 0px;\r\n" + 
    "            padding: 0px;\r\n" + 
    "            background: white;\r\n" + 
    "            font-size: 30px;\r\n" + 
    "            font-weight: bold;\r\n" + 
    "            text-shadow: 5px 5px 5px red;\r\n" + 
    "\r\n" + 
    "        }");
  pw.append("</style>");
  pw.append("<h1 align ='center'>2021你年垮2022年QQ登陆失败的界面</h1>");
  pw.append("登陆界面失败请重新登陆");
  response.setHeader("refresh","5;URL=Register.jsp");
  pw.append("<h2 align ='center'><a href='ServlectDengLu'>点击这里返回登陆界面进行重新登陆</a></h2>");
  pw.append("如果用户一分钟后没有任何操作则在60秒后调到index.jsp文件");
  response.setHeader("refresh","60;URL=insex.jsp");
  }
  /**
  * @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);
  }
}

package com.DengLu.And.Zhu.Ce;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Random;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * Servlet implementation class ServlectDengLuLogic
 */
@WebServlet("/ServlectDengLuLogic")
public class ServlectDengLuLogic extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ServlectDengLuLogic() {
        super();
        // TODO Auto-generated constructor stub
    }
  /**
  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // TODO Auto-generated method stub
  }
  /**
  * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
  */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  /**
   * do--post
   */
   response.setContentType("text/html");
   response.setCharacterEncoding("UTF-8");
  ServletContext  sc=getServletContext();
  //获取web.xml文件中的镜头数据
  String a=sc.getInitParameter("USER");
  String b=sc.getInitParameter("PSD");
  System.out.println(a+"@@@@@@@@"+b);
   response.getWriter().append("ServletB获得静态数据用来访问web.xml"+a);
   String aa=request.getParameter("user");
   String bb=request.getParameter("psd");
    //不区分大小写equalsIgnoreCase(aa)
    if(a.equalsIgnoreCase(aa)&&b.equalsIgnoreCase(bb)) {
     //重定向跳转页面
     System.out.println("登录成功跳转到2021登录成功");
     response.sendRedirect("HomeServlect2");
    }else {
     System.out.println("登录失败五秒后返回Register.jsp");
     response.sendRedirect("Register.jsp");
    }
  }
}

package com.DengLu.And.Zhu.Ce;
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;
/**
 * Servlet implementation class ServlectDengLuLose
 */
@WebServlet("/DengLuChengGong")
public class ServlectDengLuLose extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ServlectDengLuLose() {
        super();
        // TODO Auto-generated constructor stub
    }
  /**
  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  response.setContentType("text/html");
  response.setCharacterEncoding("utf-8");
  PrintWriter pw = response.getWriter();
  pw.append("<h1>欢迎你成功登录2021-2022年的QQ登录页面</h1>");
  pw.append("  *{\r\n" + 
    "            margin: 0px;\r\n" + 
    "            padding: 0px;\r\n" + 
    "            background: white;\r\n" + 
    "            font-size: 40px;\r\n" + 
    "            font-weight: bold;\r\n" + 
    "            text-shadow: 5px 5px 5px red;\r\n"
    + "  background: pink;" + 
    "");
  response.setHeader("refresh","60;URL=Register.jsp");
  }
  /**
  * @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);
  }
}

package com.DengLu.And.Zhu.Ce;
import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * Servlet implementation class ServlectZhuCeLogic
 */
@WebServlet("/ServlectZhuCeLogic")
public class ServlectZhuCeLogic extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ServlectZhuCeLogic() {
        super();
        System.out.println("2021你年垮2022年QQ注注册界面logic的判断");
        // TODO Auto-generated constructor stub
    }
  /**
  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // TODO Auto-generated method stub
  response.getWriter().append("Served at: ").append(request.getContextPath());
  }
  /**
  * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
  */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // dopost 
  response.setContentType("text/html");
  response.setCharacterEncoding("UTF-8");
  ServletContext  sc=getServletContext();
  //获取web.xml文件中的镜头数据
  String a=sc.getInitParameter("USER");
  String b=sc.getInitParameter("QQ");
  String c=sc.getInitParameter("PSD");
  String d=sc.getInitParameter("SJ");
    System.out.println(a+"#"+b+"#"+c+"#"+d);
   response.getWriter().append("<h2>ServlectZhuCeLogic获得静态数据用来访问name:</h2>"+a);
  //获得浏览器数据
   String aa=request.getParameter("user");
   String bb=request.getParameter("qq");
   String cc=request.getParameter("psd");
   String dd=request.getParameter("sj");
    /* System.out.println(aa+":"+bb+":"+cc); */
    //不区分大小写equalsIgnoreCase(aa)
    if(a.equalsIgnoreCase(aa)&&b.equalsIgnoreCase(bb)&&c.equalsIgnoreCase(cc)&&d.
      equalsIgnoreCase(dd)) {
     //重定向跳转页面
     System.out.println("登录成功跳转到ServlectDengLu");
     response.sendRedirect("Login.jsp");
    }else {
     System.out.println("登录失败五秒后返回ServlectZhuCeLose");
     response.sendRedirect("ServlectZhuCeLose");
    }
  }
}

package com.DengLu.And.Zhu.Ce;
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;
/**
 * Servlet implementation class ServlectZhuCeLose
 */
@WebServlet("/ServlectZhuCeLose")
public class ServlectZhuCeLose extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ServlectZhuCeLose() {
        super();
        System.out.println("请重新注册没有成功哦");
        // TODO Auto-generated constructor stub
    }
  /**
  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  response.setContentType("text/html");
  response.setCharacterEncoding("utf-8");
  PrintWriter pw = response.getWriter();
  pw.append("<style>");
  pw.append(" *{\r\n" + 
    "            margin: 0px;\r\n" + 
    "            padding: 0px;\r\n" + 
    "            background: white;\r\n" + 
    "            font-size: 30px;\r\n" + 
    "            font-weight: bold;\r\n" + 
    "            text-shadow: 5px 5px 5px red;\r\n" + 
    "\r\n" + 
    "        }");
  pw.append("</style>");
  pw.append("<h1 align ='center'>2021你年垮2022年QQ注册失败的界面</h1>");
  pw.append("<h1  align ='center' style='color;red';background:green>2021你年垮2022年QQ注注册界面失败请重新注册</h1>");
  pw.append("<h2 align ='center'>五秒后自动返回注册页面</h2>");
  response.setHeader("refresh","5;URL=Register.jsp");
  }
  /**
  * @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);
  }
}

package com.Filter;
import java.io.IOException;
import java.io.OutputStream;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class MyFilter4 implements Filter{
  public MyFilter4() {
  // TODO Auto-generated constructor
  System.out.println("我创建了第一个MyFilter过滤器");
  }
  @Override
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
    throws IOException, ServletException {
    response.setContentType("text/html");
    response.setCharacterEncoding("UTF-8"); 
    System.out.println("我是myfilter开始拦截请求地址哦哦");
  }
  @Override
  public void init(FilterConfig config) throws ServletException {
  // TODO Auto-generated method stub
  System.out.println("FilterConfig用来加载初始化数据");
  }
  @Override
  public void destroy() {
  System.out.println("Filter所有方法运行完毕后销毁过滤器");
  }
}
package com.Listener;
/**
 * 第三类接口
 */
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;
public class Listener  implements   HttpSessionBindingListener {
    private int id;
     private String username;
     private String password;
     public Listener() {
    // TODO Auto-generated constructor stub
  }
  public Listener(int id, String username, String password) {
    super();
    this.id = id;
    this.username = username;
    this.password = password;
  }
  public int getId() {
  return id;
  }
  public void setId(int id) {
  this.id = id;
  }
  public String getUsername() {
  return username;
  }
  public void setUsername(String username) {
  this.username = username;
  }
  public String getPassword() {
  return password;
  }
  public void setPassword(String password) {
  this.password = password;
  }
  @Override
  public String toString() {
  return "Listener [id=" + id + ", username=" + username + ", password=" + password + ", getId()=" + getId()
    + ", getUsername()=" + getUsername() + ", getPassword()=" + getPassword() + ", getClass()=" + getClass()
    + ", hashCode()=" + hashCode() + ", toString()=" + super.toString() + "]";
  }
  @Override
  public void valueBound(HttpSessionBindingEvent event) {
  // TODO Auto-generated method stub
   System.out.println("HttpSession 与 Listener绑定");
  HttpSessionBindingListener.super.valueBound(event);
  }
  @Override
  public void valueUnbound(HttpSessionBindingEvent event) {
  // TODO Auto-generated method stub
   System.out.println("HttpSession 与 Listener解绑绑");
  HttpSessionBindingListener.super.valueUnbound(event);
  }
}

package com.Servlect;
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;
/**
 * Servlet implementation class HomeServlect2
 */
@WebServlet("/HomeServlect2")
public class HomeServlect2 extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public HomeServlect2() {
        super();
        // TODO Auto-generated constructor stub
    }
  /**
  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // TODO Auto-generated method stub
  //response.getWriter().append("Served at: ").append(request.getContextPath());
  response.setContentType("text/html");
  response.setCharacterEncoding("UTF-8");
  PrintWriter pw =response.getWriter();
  pw.append("<h1 style='color:red'>登录成功</h1>");
  pw.append("<h1><a href='ServlectOne'>返回主界面</a></h1>");
  }
  /**
  * @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);
  }
}
package com.Servlect;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
/**
 * Servlet Filter implementation class MyFilter1
 */
//你要阻止Servlect2
@WebFilter("/Servlect2")
public class MyFilter1 implements Filter {
    /**
     * Default constructor. 
     */
    public MyFilter1() {
        // TODO Auto-generated constructor stub
      System.out.println("构造方法");
    }
  /**
  * @see Filter#destroy()
  */
  public void destroy() {
  // TODO Auto-generated method stub
  System.out.println("销毁数据");
  }
  /**
  * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
  */
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
  response.setContentType("text/html");
  response.setCharacterEncoding("UTF-8");
  System.out.println("我是myfilter1开始拦截请求地址哦哦");
  //实施访问
  chain.doFilter(request, response);
  }
  /**
  * @see Filter#init(FilterConfig)
  */
  public void init(FilterConfig fConfig) throws ServletException {
  // TODO Auto-generated method stub
  System.out.println("加载数据");
  }
}
package com.Servlect;
/**
 * A202020895
 * 10/29
 * 
 */
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.Random;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * Servlet implementation class Servlet1
 */
@WebServlet("/Servlet1")
public class servlect1 extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public servlect1() {
        super();
        System.out.println("servlect在运行中使用cookie访问");
        // TODO Auto-generated constructor stub
    }
    @Override
    public void init() throws ServletException {
      // TODO Auto-generated method stub
      super.init();
      System.out.println("servlectinit方法");
    }
  /**
  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  response.setContentType("text/html");
  response.setCharacterEncoding("UTF-8");
  /* response.sendRedirect("Servlet1"); */
  int i=(int)(Math.random()*900000+100000);
  int a=(int)(Math.random()*9000+1000);
  int c=(int)(Math.random()*900+100);
  System.out.println("@@@@"+(new Random().nextInt(900000)+100000));
  /*
   * 设置随机
   */
  System.out.println(new Random().nextInt(100));
  System.out.println(Math.random());

package com.Servlect;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
/**
 * Servlet Filter implementation class MyFilter1
 */
//你要阻止Servlect2
@WebFilter("/Servlect2")
public class MyFilter1 implements Filter {
    /**
     * Default constructor. 
     */
    public MyFilter1() {
        // TODO Auto-generated constructor stub
      System.out.println("构造方法");
    }
  /**
   * @see Filter#destroy()
   */
  public void destroy() {
    // TODO Auto-generated method stub
    System.out.println("销毁数据");
  }
  /**
   * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
   */
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    response.setContentType("text/html");
    response.setCharacterEncoding("UTF-8");
    System.out.println("我是myfilter1开始拦截请求地址哦哦");
    //实施访问
    chain.doFilter(request, response);
  }
  /**
   * @see Filter#init(FilterConfig)
   */
  public void init(FilterConfig fConfig) throws ServletException {
    // TODO Auto-generated method stub
    System.out.println("加载数据");
  }

package com.Servlect;
/**
 * A202020895
 * 10/29
 * 
 */
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.Random;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * Servlet implementation class Servlet1
 */
@WebServlet("/Servlet1")
public class servlect1 extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public servlect1() {
        super();
        System.out.println("servlect在运行中使用cookie访问");
        // TODO Auto-generated constructor stub
    }
    @Override
    public void init() throws ServletException {
      // TODO Auto-generated method stub
      super.init();
      System.out.println("servlectinit方法");
    }
  /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    response.setContentType("text/html");
    response.setCharacterEncoding("UTF-8");
    /* response.sendRedirect("Servlet1"); */
    int i=(int)(Math.random()*900000+100000);
    int a=(int)(Math.random()*9000+1000);
    int c=(int)(Math.random()*900+100);
    System.out.println("@@@@"+(new Random().nextInt(900000)+100000));
    /*
     * 设置随机
     */
    System.out.println(new Random().nextInt(100));
    System.out.println(Math.random());
    PrintWriter  pw =response.getWriter();
    pw.print("你的支付宝到账1000万元，需要的码号为:<h1 style='color:red ;background-color:green'>"+i+"</h1>,打死也不说  \"<hr>\";");
    pw.print("你的QQ到账1000万元，需要的码号为:<h2 style='color:red ;background-color:green'>"+c+"</h2>,打死也不说   \"<hr>\";");
    pw.print("你的微信到账1000万元，需要的码号为:<span style='color:green'>"+a+"</span>,打死也不说"); 
    pw.print("你的手机支付宝到账1000万<span style='color :red'>"+i+"</span>");
    //浏览器通过地址访问服务器的servelt
    //servlet要获得该浏览器所携带的所有cookie对象
    Cookie[] cookies=request.getCookies();
    if (cookies!=null) {
      //循环遍历每一个cookie，直到找到servlet能识别的cookie值为止
      //tag,china
      for (int e = 0; e < cookies.length; e++) {
        //通过cookie中存储的数据的名称
        String name=cookies[i].getName();
        if ("AAA".equals(name)) {
          //这个cookie是服务器要找的东西,从cookie中获得中文数据需要进行解码
          String value=URLDecoder.decode(cookies[e].getValue(), "UTF-8");
          System.out.println(value);
          pw.print(value);
          break;  
        }
      }
    }else {
      //没有cookie,说明当前浏览器以前没有访问过服务器
      //创建cookie对象,存储中文数据的时候，需要对数据进行转码
      Cookie cookie=new Cookie("AAA", URLEncoder.encode("bbbbbbbb", "UTF-8"));
      //设置浏览器退出后，cookie还能继续存在内存中的时间
      cookie.setMaxAge(30);
      response.addCookie(cookie);
      pw.print("服务器给浏览器创建了一个cookie对象");
    }
  }
  /**
   * @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);
  }
}

package com.Servlect;
/**
 * 这一个类让我们去了解Servlect的周期
 */
import java.io.IOException;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class ServlectOne  implements Servlet{
  public ServlectOne() {
    // TODO Auto-generated constructor stub
    System.out.println("@1 Servlec方法的构造方法");
  }
  @Override
  public void destroy() {
  System.out.println("@2 Servlect方法的销毁");
  }
  @Override
  public ServletConfig getServletConfig() {
    // TODO Auto-generated method stub
    System.out.println("@ 3Servlect方法加载静态数据");
    return null;
  }
  @Override
  public String getServletInfo() {
    // TODO Auto-generated method stub
    System.out.println("@ 4 Servlect的getServletInfo方法");
    return null;
  }
  @Override
  public void init(ServletConfig config) throws ServletException {
    // 获取静态数据的对象
    String a=config.getInitParameter("SFZ");
      System.out.println(a);
    System.out.println("@5 Servlecto的init方法");
    System.out.println("获取静态数据的对象config");
    //动态数据的获取
  }
  @Override
  public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
    // TODO Auto-generated method stub
    System.out.println("@5 Servlecto的servlect方法");
  }
}

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style>
    *{
      text-align: center;
      align-content: center;
      margin: 30px;
      font-size: 30px;
      background:lightskyblue;
      font-weight: 700;
      font-family: "微软雅黑";
      padding: 2px;
      color: red;
    }
    article{
    }
   </style>
<title>登录页面</title>
</head>
<body>
<article>
      <h1>欢迎来到2021年个人QQ登录界面</h1>
    <form action="ServlectDengLuLogic" method="">
    <img src="img/aq (4).png"  style="border-radius: 70%; height: 200px;"/>
        QQ号：<input type='text'  name='qq'><br>
        密码:<input type='password' name='psd'><br>
<input type='checkbox' value='flase' checked='checked' name='ispsd'>记住密码&nbsp;&nbsp;    
    <input type='checkbox' value='true' name='islogin'>自动登录<br>
    <input type='submit' value='登录'><br>
    </form>
    </article>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style type="text/css">
* {
    margin: 0;
    padding: 0;
   background: cornflowerblue;
}
body {
    background-color: #ffffff;
}
li {
    list-style: none;
}
left {
    width: 480px;
    float: left;
}
.header {
    width: 1040px;
    height: 100px;
    float: right;
}
.top {
    float:  right;
}
.main {
    width: 500px;
    margin: 0 auto;
}
.one h1 {
    font-size: 46px;
    font-weight: 400;
    margin-bottom: 20px;
}
.two {
    font-size: 28px;
    color: #333333;
    margin-bottom: 64px;
    float: left;
}
.there {
    float: right;
    margin-bottom: 64px;
}
.there a {
    font-size: 28px;
    text-decoration: none;
    color: #359eff;
}
.there a:hover {
    color: #094683;
}
.input-outer input {
    height: 50px;
    width: 438px;
    margin-bottom: 40px;
    border-radius: 10px;
    border: 1px solid #c1c1c1;
    color: #c1c1c1;
    font-size: 20px;
}
.input-outer span,
.input-phone span {
    font-size: 25px;
    text-align: center;
    line-height: 50px;
    color: #333333;
}
.input-type select {
  margin: auto;
    height: 50px;
    border-radius: 10px;
    border: 1px solid #c1c1c1;
    font-size: 20px;
    float: left;
}
.input-phone input {
    height: 50px;
    width: 268px;
    border-radius: 10px;
    border: 1px solid #c1c1c1;
    font-size: 20px;
    margin-left: 20px;
}
.input-qq input {
    height: 50px;
    width: 268px;
    border-radius: 10px;
    border: 1px solid #c1c1c1;
    font-size: 20px;
    margin-left: 20px;
}
.six p {
    color: #c1c1c1;
    font-size: 14px;
}
.sub input {
  align-content: center;
  text-align: center;
    height: 50px;
    width: 440px;
    margin: 40px 0;
    font-size: 20px;
    color: #ffffff;
    background-color: #3588ff;
    border: 1px solid #c1c1c1;
    border-radius: 10px;
}
.type-radio span {
  align-content: center;
  text-align: center;
    font-size: 14px;
    color: #c1c1c1;
}
.footer {
  align-content: center;
  text-align: center;
    margin: 40px 0;
    text-align: center;
    color: #c1c1c1;
    }
h1{
 text-shadow: 5px 5px 5px red;
}
</style>
<title>注册页面</title>
</head>
<body>
<h1 style="background: aquamarine; color: red; font-weight: 900; text-align: center;">欢迎来到2021年个人QQ注册界面</h1>
            <article style="text-align: center; align-content: center; text-align: center;">
             <form action="ServlectZhuCeLogic" method="post">
         <img src="img/aq (3).png" style="border-radius: 89%%;"  height="200px" align="center"/>
             <div class="input-outer">
                  <h1>呢称：</h1><br><input type="text" name="user" id="text" maxlength="8">
             </div>
             <div class="input-qq">
                     <h1>QQ号：</h1><br><input type="text" name="qq" maxlength="11" minlength="11">
                 </div>
             <div class="input-outer">
                  <h1>密码 ：</h1><br><input type="password" name="psd" id="password" maxlength="16">
             </div>
                 <div class="input-phone">
                     <h1>手机号：</h1><br><input type="text"  name="sj"   maxlength="11" minlength="11" >
                 </div>
                 <div class="six">
                     <p>可通过手机号找回密码</p>
                 </div>
             </div>
             <div class="sub">
                 <input type="submit" value="立即注册">
             </div>
             </form>
             </article>
             <div class="type-radio">
                 <input type="radio" checked><span style="text-align: center;">同意开通QQ空间</span>
                 <br>
                 <input type="radio" checked><span style="text-align: center;">我已阅读并同意相关服务条款和隐私政策开始进行登录QQ页面</span>
             </div>
            <div>
              <footer>
                <h1>这是QQ的注册页面</h1>
              </footer>
            </div>
         </div>
     </div>
</body>
</html>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
  <display-name>QQLoginD</display-name>
  <welcome-file-list>
  <welcome-file>LoginServlect</welcome-file>
    <welcome-file>Register.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
   <servlet-name>ServlectOne</servlet-name>
  <servlet-class>com.Servlect.ServlectOne</servlet-class>
  <init-param>
 <param-name>SFZ</param-name>
 <param-value>360429100056781234</param-value>
 </init-param>
  </servlet>
   <context-param>
  <param-name>LQ</param-name>
  <param-value>篮球</param-value>
  </context-param>
  <servlet-mapping>
  <servlet-name>ServlectOne</servlet-name>
  <url-pattern>/ServlectOne</url-pattern>
  </servlet-mapping>
  <!--过滤器的注册  -->
   <filter>
 <filter-name>MyFilter4</filter-name>
 <filter-class>com.Filter.MyFilter4</filter-class>
 </filter>
 <filter-mapping>
    <filter-name>MyFilter4</filter-name>
    <!-- 这表示可以拦截任何请求 -->
    <url-pattern>/Servlect1</url-pattern>
  </filter-mapping>
  <!--listener的注册  -->
  <listener>
    <listener-class>com.Listener.Listener</listener-class>
</listener>
<context-param>
  <param-name>USER</param-name>
  <param-value>hug</param-value>
  </context-param>
  <context-param>
  <param-name>QQ</param-name>
  <param-value>123456</param-value>
  </context-param>
  <context-param>
  <param-name>PSD</param-name>
  <param-value>123456</param-value>
  </context-param>
  <context-param>
  <param-name>SJ</param-name>
  <param-value>18172928419</param-value>
  </context-param>
</web-app>

2022年Servlect课时十八——综合案例一

二个案例采用了Servlect,Filter,Listener。

运行结果图

创建项目如上图所示

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2022年Servlect课时十八——综合案例一

二个案例采用了Servlect,Filter,Listener。

运行结果图

创建项目 如上图所示

热门文章

最新文章

相关课程

相关电子书

相关实验场景

创建项目如上图所示