Library management system based on javaweb

Language 2023-12-17 05:35:51 views: null

1. System introduction

This project useseclipse tool development, jsp+servlet Technically written, the style uses the layui front-end framework, and the database uses mysql and navicat development tools.

The system is divided into 2 roles:Administrator and student

2. Module Introduction
Administrator


1. Login

2. Modify personal information

3. Book type management

4. Library management

5. Book borrowing management

6. Borrowing approval management

7. Book borrowing statistics

8. Student management

9. Announcement management

Student
1. Log in and register

2. Modification of personal information

3. Book borrowing

4. Borrowing management

5. Borrowing statistics

6. View announcements

3. Relevant screenshots

Project structure, database structure

 

 Login registration page

 

 Book type management

 Library management

 Student management

 Approval management

 

Borrowing management

 Announcement management

 Administrator statistics

 Student Statistics

 Book borrowing

 Borrowing history

 4. Related codes

Login code

The user fills in the specified user name and password through the login.jsp page, clicks the login button, and executes the method in the servlet. After the background verification is successful, it returns to main.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
	pageEncoding="utf-8"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>
<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>Login Page</title>
		<!-- 样 式 文 件 -->
		<link rel="stylesheet" href="resource/component/pear/css/pear.css" />
		<link rel="stylesheet" href="resource/admin/css/other/login.css" />
	</head>
    <!-- 代 码 结 构 -->
	<body background="resource/admin/images/background.svg" style="background-size: cover;">
		<form class="layui-form" action="LoginServlet?action=login" method="post"  id="loginForm" name="loginForm" >
			<div class="layui-form-item">
				<img class="logo" src="resource/admin/images/logo.png" />
				<div class="title">登&emsp;&emsp;录</div>
				<div class="desc">
					 图  书  管  理  系  统
				</div>
			</div>
			<div class="layui-form-item">
				<input type="text" placeholder="请输入用户名或者手机号" name="userName" id="userName" hover class="layui-input"  />
				<span id="msg3" style="color:red">${message}</span>
			</div>
			<div class="layui-form-item">
				<input id="password" type="password" name="password" placeholder="请输入密码" hover class="layui-input"  />
			</div>
			<div class="layui-form-item" style="text-align: center;">
			      <input type="radio" name="type" id="type" value="1" title="管理员" checked>
                  <input type="radio" name="type" id="type" value="2" title="学生" > 
			</div>
			<div class="layui-form-item">
				<button type="submit" class="pear-btn pear-btn-success login" id="login">
					登录
				</button>
			</div>
			 <div class="layui-form-item">
				<a href="LoginServlet?action=toRegister" class="pear-btn pear-btn-warming  layui-btn-fluid">去注册</a>
			</div> 
		</form>
		<!-- 资 源 引 入 -->
		<script src="resource/component/layui/layui.js"></script>
		<script src="resource/component/pear/pear.js"></script>
		<script>
		layui.use(['layer', 'form','jquery'], function(){
			var form = layui.form,
			 layer = layui.layer,
			 $= layui.jquery;
			 form.render();//这句一定要加，占坑
		   
		$("#login").on("click", function() {
		    var userName = $("#userName").val().trim(); // trim()去除空格
		    var password = $("#password").val().trim();
		    var type = $("#type").val();
		    
		    
		    if(userName == ""){
		    	layer.msg('用户名或者手机号不能为空！');
		    	return false;
		    }
		    if(password == ""){
		    	layer.msg('密码不能为空！');
		    	return false;
		    }
		    if(type == ""){
		    	layer.msg('请选择角色！');
		    	return false;
		    }

		});

		setTimeout(function(){ $("#msg").html("")},3000);
		setTimeout(function(){ $("#msg2").html("")},3000);
		setTimeout(function(){ $("#msg3").html("")},3000);
		});
		</script>
	</body>
</html>



	private void login(HttpServletRequest request, HttpServletResponse response) {
		// TODO Auto-generated method stub
		removeAll(request,response);
		String userName = request.getParameter("userName");
		String password = request.getParameter("password");
		String type = request.getParameter("type");
		if(type.equals("1")){
			Admin admin = new Admin();
			admin.setUserName(userName);
			admin.setPwd(password);
			Admin admin1 = ls.selectAdmin(admin);
			  try {
					 if (admin1 == null){
			        	  request.setAttribute("message", "管理员用户不存在或者密码错误");
						  request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(request, response);
			         }else {
			        	  request.getSession().setAttribute("admin",admin1);
			        	  request.getSession().setAttribute("flag",1);
			              request.getRequestDispatcher("/WEB-INF/views/main.jsp").forward(request, response);
			         }				
				 } catch (Exception e) {
				 	e.printStackTrace();
				 }
		 }else if(type.equals("2")){
			 Student student = new Student();
			 student.setStno(userName);
			 student.setPwd(password);
			 Student student1 = ls.selectStudent(student);
			  try {
					 if (student1 == null){
			        	  request.setAttribute("message", "学号不存在或者密码错误");
						  request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(request, response);
			         }else {
			        	  request.getSession().setAttribute("student",student1);
			        	  request.getSession().setAttribute("flag",2);
			              request.getRequestDispatcher("/WEB-INF/views/main.jsp").forward(request, response);
			         }				
				 } catch (Exception e) {
				 	e.printStackTrace();
				 }
		 }else{
			    request.setAttribute("message", "工作人员手机号不存在或者密码错误");
			    try {
				request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(request, response);
				} catch (Exception e) {
					e.printStackTrace();
				} 
		 }
	}

Registration code

Students initialize and register their own accounts, fill in the form, and after raising the price, insert operations are performed in the background. After successful registration, they will jump to the login page.

<%@ page language="java" contentType="text/html; charset=utf-8"
	pageEncoding="utf-8"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>
<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>Login Page</title>
		<!-- 样 式 文 件 -->
		<link rel="stylesheet" href="resource/component/pear/css/pear.css" />
		<link rel="stylesheet" href="resource/admin/css/other/login.css" />
	</head>
    <!-- 代 码 结 构 -->
	<body background="resource/admin/images/background.svg" style="background-size: cover;">
		<form class="layui-form" action="StudentServlet?action=addStudent" method="post"  id="loginForm" name="loginForm" >
			 <input id="te" type="hidden" name="te" value="1" />
			<div class="layui-form-item">
				<img class="logo" src="resource/admin/images/logo.png" />
				<div class="title">注&emsp;&emsp;册</div>
				<div class="desc">
					 图  书  管  理  系  统
				</div>
			</div>
			<div class="layui-form-item">
				<input type="text" placeholder="请输入姓名" name="name" id="name" hover class="layui-input"  />
				<span id="msg" style="color:red">${message}</span>
			</div>
			<div class="layui-form-item">
				<input id="stno" type="text" name="stno" placeholder="请输入学号" hover class="layui-input"  />
			</div>
			<div class="layui-form-item">
				<select name="sex" id ="sex">
				        <option value="">请选择性别</option>
				        <option value="男">男</option>
				        <option value="女">女</option>
				      </select>
			</div>
			 <div class="layui-form-item">
				<input id="classes" type="text" name="classes" placeholder="请输入班级" hover class="layui-input"  />
			</div>
			 <div class="layui-form-item">
				<input id="time" type="text" name="time" placeholder="请输入入学时间" hover class="layui-input"  />
			</div>
			 <div class="layui-form-item">
				<input id="phone" type="text" name="phone" placeholder="请输入手机号" hover class="layui-input"  />
			</div>
			 <div class="layui-form-item">
				<input id="pwd" type="text" name="pwd" placeholder="请输入登录密码" hover class="layui-input"  />
			</div>
			 <div class="layui-form-item">
				<input id="xy" type="text" name="xy" placeholder="请输入学院" hover class="layui-input"  />
			</div>
			<div class="layui-form-item">
				<button type="submit" class="pear-btn pear-btn-success login" id="login">
					注册
				</button>
			</div>
			 <div class="layui-form-item">
				<a href="LoginServlet?action=toLogin" class="pear-btn pear-btn-warming  layui-btn-fluid">返回</a>
			</div> 
		</form>
		<!-- 资 源 引 入 -->
		<script src="resource/component/layui/layui.js"></script>
		<script src="resource/component/pear/pear.js"></script>
		<script>
		layui.use(['layer', 'form','jquery','laydate'], function(){
			var form = layui.form,
			 layer = layui.layer,
			 laydate=layui.laydate,
			 $= layui.jquery;
			 form.render();//这句一定要加，占坑
		   
			 laydate.render({
				    elem: '#time'
				  });
		$("#login").on("click", function() {
			  var name = $("#name").val();
		        var sex = $("#sex").val();
		        var classes = $("#classes").val();
		        var time = $("#time").val();
		        var xy = $("#xy").val();
		        var phone = $("#phone").val();
		        var pwd = $("#pwd").val();
		        var stno = $("#stno").val();
		        if(sex == null || sex== ""){
		        	layer.msg('性别不能为空！');
		        	return false;
		        }
		        if(name == null || name== ""){
		        	layer.msg('姓名不能为空！');
		        	return false;
		        }
		        if(classes == null || classes== ""){
		        	layer.msg('班级不能为空！');
		        	return false;
		        }
		        if(time == null || time== ""){
		        	layer.msg('入学时间不能为空！');
		        	return false;
		        }
		        if(xy == null || xy== ""){
		        	layer.msg('学院不能为空！');
		        	return false;
		        }
		        if(phone == null || phone== ""){
		        	layer.msg('手机号不能为空！');
		        	return false;
		        }
		        if(pwd == null || pwd== ""){
		        	layer.msg('密码不能为空！');
		        	return false;
		        }
		        if(stno == null || stno== ""){
		        	layer.msg('学号不能为空！');
		        	return false;
		        }
		});

		setTimeout(function(){ $("#msg").html("")},3000);
		setTimeout(function(){ $("#msg2").html("")},3000);
		setTimeout(function(){ $("#msg3").html("")},3000);
		});
		</script>
	</body>
</html>

	/**
	 * 新增学生信息
	 * @param request
	 * @param response
	 */
	private void addStudent(HttpServletRequest request,
			HttpServletResponse response) {
		String te = request.getParameter("te");
		String name = request.getParameter("name");
		String sex = request.getParameter("sex");
		String classes = request.getParameter("classes");
		String time = request.getParameter("time");
		String xy = request.getParameter("xy");
		String phone = request.getParameter("phone");
		String pwd = request.getParameter("pwd");
		String stno = request.getParameter("stno");
		Student stu = new Student();
		stu.setClasses(classes);
		stu.setName(name);
		stu.setPhone(phone);
		stu.setPwd(pwd);
		stu.setSex(sex);
		stu.setState("1");
		stu.setStno(stno);
		stu.setTime(time);
		stu.setXy(xy);
		Student student = ss.selectStudentByPhone(phone);
		Student student1 = ss.selectStudentByStuNo(stno);
		if(te == null || te.equals("")){
			if(student != null){
				request.setAttribute("message", "电话号码重复！");
				try {
					request.getRequestDispatcher("/WEB-INF/views/student/addStudent.jsp").forward(request,response);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}else if(student1 != null){
				request.setAttribute("message", "学号重复！");
				try {
					request.getRequestDispatcher("/WEB-INF/views/student/addStudent.jsp").forward(request,response);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}else{
				try {
					ss.saveStudent(stu);
		 			response.sendRedirect(request.getContextPath()+"/StudentServlet?action=studentList");
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
			
		}else{
			if(student != null){
				request.setAttribute("message", "电话号码重复！");
				try {
					request.getRequestDispatcher("/WEB-INF/views/register.jsp").forward(request,response);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}else if(student1 != null){
				request.setAttribute("message", "学号重复！");
				try {
					request.getRequestDispatcher("/WEB-INF/views/register.jsp").forward(request,response);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}else{
				try {
					ss.saveStudent(stu);
		 			response.sendRedirect(request.getContextPath()+"/LoginServlet?action=toLogin");
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
			
		}
		
	}

student list code

Query the information of all students through paging in the background and return to studentList.jsp for traversal display.


	/**
	 * 分页查询学生
	 * @param request
	 * @param response
	 */
	private void studentList(HttpServletRequest request,
			HttpServletResponse response) {
		String p=request.getParameter("p");//接收页码
        int pageSize=4;//每页显示5条
        int pageNum=1; //默认第一页
        if(p!=null){
            pageNum= Integer.parseInt(p);
        }
        //调用分页查询
        List<Student> list=ss.getstudentListPage(pageNum,pageSize);
        //携带参数到页面
        int nums=ss.queryStudentCount(); //查询总数
        //计算总页数
        int totalPage=(nums%pageSize==0)? (nums/pageSize):(nums/pageSize+1);
        request.setAttribute("cp",pageNum); //当前页
        request.setAttribute("tp",totalPage); //总页数
		try {
         request.removeAttribute("msg");
         request.setAttribute("list" ,list);
           request.getRequestDispatcher("/WEB-INF/views/student/studentList.jsp").forward(request, response);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
<%@ page language="java" contentType="text/html; charset=utf-8"
	pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>
<jsp:include page="/WEB-INF/common/form_header.jsp"/>

<body>

	<div class="layui-col-md12">
		<div class="layui-card">
			<div class="layui-card-header">学生列表</div>
			<div class="layui-card-body">
				<form action="StudentServlet?action=studentListLike" method="post">
					 <div class="layui-form-item">
						    <div class="layui-inline">
						      <div class="layui-input-inline">
						       		<input type="text" placeholder="根据入学年份查询" name="time" id ="time" class="layui-input"  />
						      </div>
						        <div class="layui-input-inline">
						       		<input type="text" placeholder="根据入学生姓名查询" name="names" id ="names" class="layui-input"  />
						      </div>
						    </div>
						    <div class="layui-inline">
						      <button type="submit" class="layui-btn layui-btn-sm layui-btn-normal">查询</button>
						       <a href="StudentServlet?action=toAddStudent"
					class="layui-btn layui-btn-sm layui-btn-normal">新增学生</a>
						  </div>
						  </div>
					
					<%-- </c:if> --%>
		           </form>   
				<table class="layui-table">
					<thead>
						<tr>
						    <th>姓名</th>
							<th>性别</th>
							<th>班级</th>
							<th>入学时间</th>
							<th>学院</th>
							<!-- <th>能否借阅书籍</th> -->
							<th>手机号</th>
							<th>密码</th>
							<th>学号</th>
							<c:if test="${flag == 1}">
								<th>操作</th>
							</c:if>
						</tr>
					</thead>
					<tbody>
						<c:forEach items="${list}" var="u">
							<tr>
							    <td>${u.name }</td>
								<td>${u.sex }</td>
								<td>${u.classes }</td>
								<td>${u.time }</td>
								<td>${u.xy }</td>
								<%-- <td>
								<c:if test="${u.state == '1'}">
								  <span style="color:green">能</span>
								</c:if>
								
								<c:if test="${u.state == '2'}">
								  <span style="color:red">不能</span>
								</c:if>
                               </td> --%>
								<td>${u.phone }</td>
								<td>${u.pwd }</td>
								<td>${u.stno }</td>
								<c:if test="${flag == 1}">
								<td>  
									<input id ="${u.id}" value="${u.id}" type="hidden" class="weui-input"/>
								
								<a href="StudentServlet?action=toUpdateStudent&id=${u.id}" id="update"
									class="layui-btn layui-btn-sm layui-btn-norma"><i
										class="layui-icon">修改</i></a>
								 <a  href='javascript:void(0)' class="layui-btn layui-btn-sm layui-btn-danger"><i
										class="layui-icon">删除</i></a>
								<%-- <a href="StudentServlet?action=deleteStudent&id=${u.id}" id="delete"
									class="layui-btn layui-btn-sm layui-btn-danger"><i
										class="layui-icon">删除</i></a> --%>
										</td>
								</c:if> 
							</tr>
						</c:forEach>
					</tbody>
				</table>
               <div style="text-align: center">
					<div class="layui-btn-group">
						<a class="layui-btn layui-btn-primary"
							href="StudentServlet?action=studentList&p=1">首页</a>
						<%--        判断是否有上一页--%>
						<c:if test="${cp>1}">
							<a class="layui-btn layui-btn-primary"
								href="StudentServlet?action=studentList&p=${cp-1}">上一页</a>
						</c:if>
						<%--        循环显示页码--%>
						<c:forEach begin="${cp-2>1 ? (cp-2) :1}"
							end="${cp+2>tp?tp:(cp+2)}" var="e">
							<%--            判断是否是当前页--%>
							<c:if test="${cp==e}">
								<a class="layui-btn layui-btn-danger"
									href="StudentServlet?action=studentList&p=${e}">${e}</a>
							</c:if>
							<c:if test="${cp!=e}">
								<a class="layui-btn layui-btn-primary"
									href="StudentServlet?action=studentList&p=${e}">${e}</a>
							</c:if>

						</c:forEach>

						<%--        判断是否有下一页--%>
						<c:if test="${cp<tp}">
							<a class="layui-btn  layui-btn-primary"
								href="StudentServlet?action=studentList&p=${cp+1}">下一页</a>
						</c:if>
						<a class="layui-btn  layui-btn-primary"
							href="StudentServlet?action=studentList&p=${tp}">尾页</a> <a
							clss="layui-btn" href="StudentServlet?action=studentList&p=2">2</a>
						<a clss="layui-btn" href="StudentServlet?action=studentList&p=3">3</a>
						<a clss="layui-btn" href="StudentServlet?action=studentList&p=4">4</a>
					</div>
				</div>

			</div>
		</div>
	</div>

	<script src="layui/layui.js"></script>
<script src="layui/jquery-1.9.1.min.js"></script>
	<script type="application/javascript">

layui.use([ 'form','jquery','layer','laydate' ], function() {
	var form = layui.form,
	 layer = layui.layer,
	 laydate=layui.laydate,
	 $= layui.jquery;
	 form.render();//这句一定要加，占坑
	 
	 
	 $('a.layui-btn-danger').click(function(e){
	   		            var id = $(e.currentTarget).parent().find('.weui-input').attr('id');
				   		if(confirm("确定要删除吗？")){
				   		  $.post("StudentServlet?action=deleteStudent&id="+id, function(data) {
				   			   layer.msg('删除成功！',{icon:6,offset:"auto",time:2000},function(){
							    	document.location.reload();//当前页面
							    });
				   		   }); 
				   	}
	   		})
	 
	 laydate.render({
		    elem: '#time'
		    ,type: 'year'
	});

});

</script>

</body>
</html>

Add student code

Click the Add button to jump to the addStudent.jsp page. The user fills in the relevant information and submits the code to the studentservlet. After performing the insertion operation, it returns to the page and traverses the display information.


<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
     <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
      <%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>
<jsp:include page="/WEB-INF/common/form_header.jsp"/>
<body>

 
  <div class="layui-fluid">
    <div class="layui-row layui-col-space15">
      <div class="layui-col-md12">
        <div class="layui-card">
          <div class="layui-card-header">新增学生</div>
          <div class="layui-card-body">
             <form action="StudentServlet?action=addStudent" method="post" id="registerForm" name="registerForm" >
              <div class="layui-form-item">
                <label class="layui-form-label">姓名:</label>
                <div class="layui-input-inline">
				<input name="name" id="name" class="layui-input" /> 
				  <span id="msg3" style="color:red">${message}</span>
                </div>
              </div>
              
                <div class="layui-form-item">
                <label class="layui-form-label">学号:</label>
                <div class="layui-input-inline">
				<input name="stno" id="stno" class="layui-input" /> 
                </div>
              </div>
              
              <div class="layui-form-item">
	               <label class="layui-form-label">性别:</label>
	                    <select name="sex" id ="sex" style="width:13%;height:38px">
				        <option value="">请选择性别</option>
				        <option value="男">男</option>
				        <option value="女">女</option>
				      </select>
              </div>
              
              <div class="layui-form-item">
                <label class="layui-form-label">班级:</label>
                <div class="layui-input-inline">
				<input name="classes" id="classes" class="layui-input" /> 
                </div>
              </div>
              
               <div class="layui-form-item">
                <label class="layui-form-label">入学时间:</label>
                <div class="layui-input-inline">
				<input name="time" id="time" class="layui-input" /> 
                </div>
              </div>
              
               <div class="layui-form-item">
                <label class="layui-form-label">手机号:</label>
                <div class="layui-input-inline">
				<input name="phone" id="phone" class="layui-input" /> 
                </div>
              </div>
              
               <div class="layui-form-item">
                <label class="layui-form-label">登录密码:</label>
                <div class="layui-input-inline">
				<input name="pwd" id="pwd" class="layui-input" /> 
                </div>
              </div>
              
               <div class="layui-form-item">
                <label class="layui-form-label">学院:</label>
                <div class="layui-input-inline">
				<input name="xy" id="xy" class="layui-input" /> 
                </div>
              </div>
              
              
              <br>
                <div class="layui-form-item">
                <div class="layui-input-block">
                  <button class="layui-btn" type="submit" id="sub_btn">提交</button>
                  <a href="StudentServlet?action=studentList" class="layui-btn layui-btn-primary" >返回</a>
                </div>
              </div>  
              </form>
            </div>
            
          </div>
        </div>
      </div>
    </div>
		

<script src="layui/layui.js"></script>
<script src="layui/jquery-1.9.1.min.js"></script>
<script>

layui.use([ 'form','jquery','layer','laydate' ], function() {
	var form = layui.form,
	 layer = layui.layer,
	 laydate=layui.laydate,
	 $= layui.jquery;
	 form.render();//这句一定要加，占坑
	 
	 laydate.render({
		    elem: '#time'
		  });
	 
	 $(function () {
		    // 给注册绑定单击事件i
		    $("#sub_btn").click(function () {
		        var name = $("#name").val();
		        var sex = $("#sex").val();
		        var classes = $("#classes").val();
		        var time = $("#time").val();
		        var xy = $("#xy").val();
		        var phone = $("#phone").val();
		        var pwd = $("#pwd").val();
		        var stno = $("#stno").val();
		        if(sex == null || sex== ""){
		        	layer.msg('性别不能为空！');
		        	return false;
		        }
		        if(name == null || name== ""){
		        	layer.msg('姓名不能为空！');
		        	return false;
		        }
		        if(classes == null || classes== ""){
		        	layer.msg('班级不能为空！');
		        	return false;
		        }
		        if(time == null || time== ""){
		        	layer.msg('入学时间不能为空！');
		        	return false;
		        }
		        if(xy == null || xy== ""){
		        	layer.msg('学院不能为空！');
		        	return false;
		        }
		        if(phone == null || phone== ""){
		        	layer.msg('手机号不能为空！');
		        	return false;
		        }
		        if(pwd == null || pwd== ""){
		        	layer.msg('密码不能为空！');
		        	return false;
		        }
		        if(stno == null || stno== ""){
		        	layer.msg('学号不能为空！');
		        	return false;
		        }
		    });
		    setTimeout(function(){ $("#errorMsg").html("")},3000);
	});
	 setTimeout(function(){ $("#msg3").html("")},3000);

});
</script>
</body>
</html>
/**
	 * 新增学生信息
	 * @param request
	 * @param response
	 */
	private void addStudent(HttpServletRequest request,
			HttpServletResponse response) {
		String te = request.getParameter("te");
		String name = request.getParameter("name");
		String sex = request.getParameter("sex");
		String classes = request.getParameter("classes");
		String time = request.getParameter("time");
		String xy = request.getParameter("xy");
		String phone = request.getParameter("phone");
		String pwd = request.getParameter("pwd");
		String stno = request.getParameter("stno");
		Student stu = new Student();
		stu.setClasses(classes);
		stu.setName(name);
		stu.setPhone(phone);
		stu.setPwd(pwd);
		stu.setSex(sex);
		stu.setState("1");
		stu.setStno(stno);
		stu.setTime(time);
		stu.setXy(xy);
		Student student = ss.selectStudentByPhone(phone);
		Student student1 = ss.selectStudentByStuNo(stno);
		if(te == null || te.equals("")){
			if(student != null){
				request.setAttribute("message", "电话号码重复！");
				try {
					request.getRequestDispatcher("/WEB-INF/views/student/addStudent.jsp").forward(request,response);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}else if(student1 != null){
				request.setAttribute("message", "学号重复！");
				try {
					request.getRequestDispatcher("/WEB-INF/views/student/addStudent.jsp").forward(request,response);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}else{
				try {
					ss.saveStudent(stu);
		 			response.sendRedirect(request.getContextPath()+"/StudentServlet?action=studentList");
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
			
		}else{
			if(student != null){
				request.setAttribute("message", "电话号码重复！");
				try {
					request.getRequestDispatcher("/WEB-INF/views/register.jsp").forward(request,response);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}else if(student1 != null){
				request.setAttribute("message", "学号重复！");
				try {
					request.getRequestDispatcher("/WEB-INF/views/register.jsp").forward(request,response);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}else{
				try {
					ss.saveStudent(stu);
		 			response.sendRedirect(request.getContextPath()+"/LoginServlet?action=toLogin");
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
			
		}
		
	}

Modify student code

Click the modify button on the page to jump to the modified page. After modifying the content, the user submits the code and executes the servlet path in the action. After the servlet executes the relevant code, it returns to the front end to display the data! ! ! ! !


<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
     <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
      <%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>
<jsp:include page="/WEB-INF/common/form_header.jsp"/>
<body>
  <div class="layui-fluid">
    <div class="layui-row layui-col-space15">
      <div class="layui-col-md12">
        <div class="layui-card">
          <div class="layui-card-header">修改学生</div>
          <div class="layui-card-body">
             <form action="StudentServlet?action=updateStudent" method="post" id="registerForm" name="registerForm" >
              <input name="sid" id="sid" value="${student.id }" type="hidden" class="layui-input" /> 
              <div class="layui-form-item">
                <label class="layui-form-label">姓名:</label>
                <div class="layui-input-inline">
				<input name="name" id="name" value="${student.name }"  class="layui-input" /> 
				  <span id="msg3" style="color:red">${message}</span>
                </div>
              </div>
              
                <div class="layui-form-item">
                <label class="layui-form-label">学号:</label>
                <div class="layui-input-inline">
				<input name="stno" id="stno" value="${student.stno }" class="layui-input" /> 
                </div>
              </div>
              
              <div class="layui-form-item">
	               <label class="layui-form-label">性别:</label>
	                    <select name="sex" id ="sex" style="width:13%;height:38px">
				        <option value="">请选择性别</option>
				        <c:if test="${student.sex == '男' }">
					         <option value="男" selected>男</option>
					        <option value="女">女</option>
				        </c:if>
				       <c:if test="${student.sex == '女' }">
					         <option value="男" >男</option>
					        <option value="女" selected>女</option>
				        </c:if>
				      </select>
              </div>
              
              <div class="layui-form-item">
                <label class="layui-form-label">班级:</label>
                <div class="layui-input-inline">
				<input name="classes" id="classes" value="${student.classes }" class="layui-input" /> 
                </div>
              </div>
              
               <div class="layui-form-item">
                <label class="layui-form-label">学院:</label>
                <div class="layui-input-inline">
				<input name="xy" id="xy" value="${student.xy }" class="layui-input" /> 
                </div>
              </div>
              
               <div class="layui-form-item">
                <label class="layui-form-label">入学时间:</label>
                <div class="layui-input-inline">
				<input name="time" id="time" value="${student.time }" class="layui-input" /> 
                </div>
              </div>
              
               <div class="layui-form-item">
                <label class="layui-form-label">手机号:</label>
                <div class="layui-input-inline">
				<input name="phone" id="phone" value="${student.phone }" class="layui-input" /> 
                </div>
              </div>
              
               <div class="layui-form-item">
                <label class="layui-form-label">登录密码:</label>
                <div class="layui-input-inline">
				<input name="pwd" id="pwd" value="${student.pwd }" class="layui-input" /> 
                </div>
              </div>
              
              <br>
                <div class="layui-form-item">
                <div class="layui-input-block">
                  <button class="layui-btn" type="submit" id="sub_btn">提交</button>
                  <c:if test="${flag == 1 }">
                    <a href="StudentServlet?action=studentList" class="layui-btn layui-btn-primary" >返回</a>
                  </c:if>
                  <c:if test="${flag == 2 }">
                     <a href="StudentServlet?action=toUpdateStudent&id=${student.id }" class="layui-btn layui-btn-primary" >重置</a>
                  </c:if>
                 
                </div>
              </div>  
              </form>
            </div>
            
          </div>
        </div>
      </div>
    </div>
		

<script src="layui/layui.js"></script>
<script src="layui/jquery-1.9.1.min.js"></script>
<script>

layui.use([ 'form','jquery','layer','laydate' ], function() {
	var form = layui.form,
	 layer = layui.layer,
	 laydate=layui.laydate,
	 $= layui.jquery;
	 form.render();//这句一定要加，占坑
	 
	 laydate.render({
		    elem: '#time'
		  });
	 
	 $(function () {
		    // 给注册绑定单击事件
		      $("#sub_btn").click(function () {
		        var name = $("#name").val();
		        var sex = $("#sex").val();
		        var classes = $("#classes").val();
		        var time = $("#time").val();
		        var xy = $("#xy").val();
		        var phone = $("#phone").val();
		        var pwd = $("#pwd").val();
		        var stno = $("#stno").val();
		        if(sex == null || sex== ""){
		        	layer.msg('性别不能为空！');
		        	return false;
		        }
		        if(name == null || name== ""){
		        	layer.msg('姓名不能为空！');
		        	return false;
		        }
		        if(classes == null || classes== ""){
		        	layer.msg('班级不能为空！');
		        	return false;
		        }
		        if(time == null || time== ""){
		        	layer.msg('入学时间不能为空！');
		        	return false;
		        }
		        if(xy == null || xy== ""){
		        	layer.msg('学院不能为空！');
		        	return false;
		        }
		        if(phone == null || phone== ""){
		        	layer.msg('手机号不能为空！');
		        	return false;
		        }
		        if(pwd == null || pwd== ""){
		        	layer.msg('密码不能为空！');
		        	return false;
		        }
		        if(stno == null || stno== ""){
		        	layer.msg('学号不能为空！');
		        	return false;
		        }
		    });
		    setTimeout(function(){ $("#errorMsg").html("")},3000);
	});
	 setTimeout(function(){ $("#msg3").html("")},3000);

});
</script>
</body>
</html>

	/**
	 * 修改学生信息
	 * @param request
	 * @param response
	 */
	private void updateStudent(HttpServletRequest request,
			HttpServletResponse response) {
		Object flag = request.getSession().getAttribute("flag");
		String sid = request.getParameter("sid");
		String name = request.getParameter("name");
		String sex = request.getParameter("sex");
		String classes = request.getParameter("classes");
		String time = request.getParameter("time");
		String xy = request.getParameter("xy");
		String phone = request.getParameter("phone");
		String pwd = request.getParameter("pwd");
		String stno = request.getParameter("stno");
		Student stu = new Student();
		stu.setClasses(classes);
		stu.setName(name);
		stu.setPhone(phone);
		stu.setPwd(pwd);
		stu.setSex(sex);
		stu.setStno(stno);
		stu.setTime(time);
		stu.setXy(xy);
		stu.setId(Integer.parseInt(sid));
		try {
			ss.updateStudent(stu);
			if(flag != null && flag.toString().equals("1")){
				response.sendRedirect(request.getContextPath()+"/StudentServlet?action=studentList");
			}else{
				response.sendRedirect(request.getContextPath()+"/StudentServlet?action=toUpdateStudent&id="+sid);
			}
 			
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

The codes of other modules are similar. This project is suitable for beginners to learn and learn from. The overall project is relatively simple! ! ! ! ! ! !

Like and follow friends who like it, and interested students can study it! ! ! ! !

Thanks = v =

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Origin blog.csdn.net/qq_43485489/article/details/125526614
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