zoukankan      html  css  js  c++  java

  • 2020.12.17

    一、今日学习内容

          对昨天的代码进行完善

    //登录界面
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
    <%
          Object message = request.getAttribute("message");
          if(message!=null && !"".equals(message)){
      
     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
     <div align="center">
     <h1>登录页面</h1>
     <div class="content">
        <div class="main">
        <br/><br/>
        <form name="form" action="LoginServlet?method=loginadd" method="post" onsubmit="return check()">
               用户名 <input type="text" name="IDuser" placeholder="八位数字组成" /><br/><br/>
                 密&nbsp;&nbsp;码<input type="password" name="password" /><br/><br/>
                身&nbsp;&nbsp;份
                        <select name="flag" class="shortselect">
                            <option value="读者">读者</option>
                            <option value="管理员">管理员</option>
                    </select><br/><br/>
            <input type="submit" value="登录" />
        </form>
        </div>
    </div>
    <script type="text/javascript">
        function check() {
            var IDuser = document.getElementById("IDuser").value;
            //var teacher = document.getElementById("teacher");
            //var classroom = document.getElementById("classroom");
             
            //非空
            /*if(name.value == '') {
                alert('课程名称为空');
                name.focus();
                return false;
            }*/
            if(IDuser.length!=8) {
                alert('用户名长度不为8！');
                IDuser.focus();
                return false;
            }
        }
        </script>
</body>
</html>
    //manager.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title> </title>

</head>
<body>
    <%
          Object message = request.getAttribute("message");
          if(message!=null && !"".equals(message)){
      
     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
     <div align="center">
        <h1 style="color: black;">管理员功能页面</h1>
        <a href="login.jsp">返回登录页面</a>

        <div class="a">
            <a href="mareaadd.jsp">添加读者信息</a>
        </div>
        <div class="a">
            <a href="delete2.jsp">删除读者信息</a>
        </div>
        <div class="a">
            <a href="LoginServlet?method=liulan">浏览读者信息</a>
        </div>
        <div class="a">
            <a href="chaxun.jsp">查询读者信息</a>
        </div>
         <div class="a">
            <a href="xiugai.jsp">修改读者信息</a>
        </div>
    </div>
</body>
</html>
    //mareaadd.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
   <%
          Object message = request.getAttribute("message");
          if(message!=null && !"".equals(message)){
      
     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
     <div align="center">
        <h1 style="color: black;">添加学生信息</h1>
        <a href="manager.jsp">返回管理员页面</a>

    <div class="content">
        <div class="main">
        <form name="form" action="LoginServlet?method=useradd" method="post" >
            <table>
                <tr>
                    <td>用户学号</td>
                    <td><input type="text" id="IDuser" name="IDuser" placeholder="八位数字组成" /></td>
                </tr>
                <tr>
                    <td>用户姓名</td>
                    <td><input type="text" id="username" name="username"/></td>
                </tr>   
                <tr>
                    <td>用户密码</td>
                    <td><input type="password" id="password" name="password"/></td>
                </tr>              
                <tr>
                    <td>性        别</td>
                    <td>
                    <input type="radio" name="usersex" value="男"checked>男
                    <input type="radio" name="usersex" value="女">女
                    </td>
                </tr>
                <tr>
                    <td>所在班级</td>
                    <td><input type="text" id="userclass" name="userclass"/></td>
                </tr>   
                <tr>
                    <td><button type="submit" class="b">提      交<tton></td>
                </tr>
            </table>
        </form>
<script type="text/javascript"></script>
        </div>
    </div>
</body>
</html>
    //chaxun.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
          Object message = request.getAttribute("message");
          if(message!=null && !"".equals(message)){
      
     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
     <div align="center">
        <h1>查询读者信息</h1>
    <div class="content">
        <div class="main">
        <a href="manager.jsp">返回管理员页</a>
        <br/><br/>
        <form name="form" action="LoginServlet?method=chaxun" method="post" ">
            <a>读者姓名</a>&nbsp;&nbsp;<input type="text" name="username" />
            <br/><br/>
            <a>读者ID</a>&nbsp;&nbsp;<input type="text" name="IDuser" />
            <br/><br/>
            <input type="submit" value="查找" /></td>
        </form>
        </div>
    </div>
</body>
</html>
    //list.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
     
     <div align="center">
     <h1>读者信息</h1>
        <a href="manager.jsp">返回管理员页面</a>
        <table align="center">
            <tr>
                <th>读者姓名</th>
                <th>读者ID</th>
                <th>密    码</th>
                <th>班    级</th>
                <th>性    别</th>
            </tr>
                <c:forEach items="${users}" var="item" varStatus="status">
                <tr>
                    <td>${item.username}</td>
                    <td>${item.IDuser}</td>
                    <td>${item.password}</td>
                    <td>${item.userclass}</td>
                    <td>${item.usersex}</td>
                    <td><a href="LoginServlet?method=getByname&username=${item.username}">删除</a></td>
                    <td><a href="LoginServlet?method=getByname1&username=${item.username}">修改</a></td>
                </tr>
                </c:forEach>
        </table>
    </div>
</body>
    //liulan.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
          Object message = request.getAttribute("message");
          if(message!=null && !"".equals(message)){
      
     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
     <div align="center">
     <h1>读者信息</h1>
        <a href="manager.jsp">返回管理员页面</a>
        <table align="center">
            <tr>
                <th>读者姓名</th>
                <th>读者ID</th>
                <th>密    码</th>
                <th>班    级</th>
                <th>性    别</th>
            </tr>
                <c:forEach items="${users}" var="item">
                <tr>
                    <td>${item.username}</td>
                    <td>${item.IDuser}</td>
                    <td>${item.password}</td>
                    <td>${item.userclass}</td>
                    <td>${item.usersex}</td>
                </tr>
                </c:forEach>
        </table>
    </div>
</body>
    //delete1.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<div align="center">
        <h1 style="color: black;">读者信息删除</h1>
        <a href="delete2.jsp">返回上页</a>
        <table class="tb">
            <tr>
                <td>读者姓名</td>
                <td>${user1.username}</td>
            </tr>
            <tr>
                <td>读者ID</td>
                <td>${user1.IDuser}</td>
            </tr>
            <tr>
                <td>性   别</td>
                <td>${user1.usersex}</td>
            </tr>
            <tr>
                <td>班     级</td>
                <td>${user1.userclass}</td>
            </tr>
            <tr>
                <td>密     码</td>
                <td>${user1.password}</td>
            </tr>
        </table>
        <form action="LoginServlet?method=delete2" method="post" onsubmit="return check();">
         <input type="hidden" name="username" value="${user1.username}"> 
           <input type="submit" name="action1" value="确定删除">
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            if (confirm("确定删除吗？")){
                return true;
            }else{
                return false;
            }
        }
    </script>
</body>
</html>

</body>
</html>
    //delete2.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
          Object message = request.getAttribute("message");
          if(message!=null && !"".equals(message)){
      
     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
     <div align="center">
        <h1>删除读者信息</h1>
    <div class="content">
        <div class="main">
        <a href="manager.jsp">返回管理员页</a>
        <br/><br/>
        <form name="form" action="LoginServlet?method=getByname" method="post" ">
            <a>读者姓名</a>&nbsp;&nbsp;<input type="text" name="username" />
            <br/><br/>
            <input type="submit" value="删除" /></td>
        </form>
        </div>
    </div>
</body>
</html>
    //xiugai.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
          Object message = request.getAttribute("message");
          if(message!=null && !"".equals(message)){
      
     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
     <div align="center">
        <h1>修改读者信息</h1>
    <div class="content">
        <div class="main">
        <a href="manager.jsp">返回管理员页</a>
        <br/><br/>
        <form name="form" action="LoginServlet?method=getByname1" method="post" ">
            <a>读者姓名</a>&nbsp;&nbsp;<input type="text" name="username" />
            <br/><br/>
            <input type="submit" value="修改" /></td>
        </form>
        </div>
    </div>
</body>
</html>
    //xiugai1.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>

</head>
<body>
    <%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){

    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: black;">读者信息修改</h1>
        <a href="xiugai.jsp">返回上页</a>
        <form action="LoginServlet?method=xiugai" method="post" onsubmit="return check()">
            <div class="a">
                读者姓名<input type="text" id="username" name="username" value="${user2.username}"/><br/><br/>
            </div>
            <div class="a">
                读&nbsp;者&nbsp;ID<input type="text" id="IDuser" name="IDuser" value="${user2.IDuser}"/><br/><br/>
            </div>
            <div class="a">
                密&nbsp;&nbsp;&nbsp;&nbsp;码<input type="text" id="password" name="password" value="${user2.password}"/><br/><br/>
            </div>
            <div class="a">
                班&nbsp; &nbsp;&nbsp;&nbsp;级<input type="text" id="userclass" name="userclass" value="${user2.userclass}"/><br/><br/>
            </div>
            <div class="a">
                性&nbsp;&nbsp;&nbsp;&nbsp;别<input type="text" id="usersex" name="usersex" value="${user2.usersex}"/><br/><br/>
            </div>
            <input type="hidden" id="id" name="id" value="${user2.id}"/>
            <div class="a">
                <button type="submit" class="b">修   改</button>
            </div>
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            var username = document.getElementById("username");;
            var IDuser = document.getElementById("IDuser");
            var password = document.getElementById("password");
            var userclass = document.getElementById("userclass");
            var usersex = document.getElementById("usersex");

            //非空
            if(username.value == '') {
                alert('读者姓名为空');
                username.focus();
                return false;
            }
            if(IDuser.value == '') {
                alert('读者ID为空');
                IDuser.focus();
                return false;
            }
            if(password.value == '') {
                alert('密码为空');
                password.focus();
                return false;
            }
            if(userclass.value == '') {
                alert('班级为空');
                userclass.focus();
                return false;
            }
            if(usersex.value == '') {
                alert('性别为空');
                usersex.focus();
                return false;
            }
            
        }
    </script>
</body>
</html>

    二、遇到的问题

        关于增删改查的完整流程，可以做出来，但是很不熟练，需要很长时间，需要多加练习

    三、明日计划

        明天继续练习

         
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  • 原文地址：https://www.cnblogs.com/wmdww/p/14165735.html
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