学生管理系统(springMVC)

《Java Web编程》课程设计

                                                                                              学生管理系统

完成日期：   2018年12月26日

1  项目引言

1.1  项目简介

学生入校后，我们需要管理这些学生，那么就需要我们对这些学生进行很多的操作，此时我们学校对学生有条理的管理，包括一些基本信息的记录，就方便了学生的信息管理。

1.2  使用技术

这是一个学生管理系统，应用的是SSH框架Spring+SpringMVC+Hibernate的项目，

运用的知识：

spring，springmvc，hibernate，Oracle

• - 基本数据库知识Oracle

• - Spring+SpringMVC+Hibernate

• - （重点）框架的MVC设计模式的应用

• - 部分前端代码（CSS和JavaScript的应用）

1.3  开发环境

操作系统：Win10系统

开发语言：JavaEE，JavaWeb。

开发工具：MyEclipse Professional 2014, navicat

2  需求分析

1）功能介绍：

• - 增删改查学生。（test测试类中实现以及在jsp页面实现修改和删除）

• - 增删改查页面显示当前学生信息（session里获取）

• - 页面时间自动更新功能

• - 部分前端代码

(3)项目构建

项目分包：MVC架构

controller:控制层，写SpringMvc的action

dao：数据层，Hibernate对数据的操作

entity：实体类和相应的*.hbm.xml(hibernate的类配置文件)

servicesDao：业务Dao，对单笔Dao进行业务封装

utils：工具类

3  概要设计

3.1  功能模块图

增删改查学生

增删改查页面显示当前用户信息（session里获取）

时间更新

• - 部分前端代码

如图3-1所示：

实现页面显示：

注册页面

登录页面：

系统主页面：

1  系统实现

思路：

实现源码：

 package entity;

 import java.io.Serializable;
 //实现序列化接口
 //实体类
 public class Student implements Serializable{
     //要与表中字段一一对应
     private Integer id;
     private String name;
     private String password;
     private String truename;
     private String sex;
     public Integer getId() {
         return id;
     }
     public void setId(Integer id) {
         this.id = id;
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public String getPassword() {
         return password;
     }
     public void setPassword(String password) {
         this.password = password;
     }
     public String getTruename() {
         return truename;
     }
     public void setTruename(String truename) {
         this.truename = truename;
     }
     public String getSex() {
         return sex;
     }
     public void setSex(String sex) {
         this.sex = sex;
     }
     @Override
     public String toString() {
         return "Student [id=" + id + ", name=" + name + ", password="
                 + password + ", truename=" + truename + ", sex=" + sex + "]";
     }
     public Student(Integer id, String name, String password, String truename,
             String sex) {
         super();
         this.id = id;
         this.name = name;
         this.password = password;
         this.truename = truename;
         this.sex = sex;
     }
     public Student() {
         super();
     }

 }

 package dao;

 import java.sql.Date;
 import java.util.List;

 import entity.Student;
 // DAO层
 public interface StudentDAO {
     //添加一条数据到数据库中
     public void insert (Student stu);
     //查询所有数据
     public List<Student> queryall();
     //查询单条数据
     public Student query(String name);
     //删除单条数据
     public void delete(Integer id);
     //修改一条数据
     public void update(Student stu);
     //查询单条数据
     public Student queryone(Integer id);
     //展示日期
     public Date date();
 }

Mapper:

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
 <mapper namespace="dao.StudentDAO">
       <insert id="insert" parameterType="student">
       <selectKey order="BEFORE" resultType="int" keyProperty="id">
           select student_sql.nextval from dual
       </selectKey>
           insert into student values(#{id},#{name},#{password},#{truename},#{sex})
       </insert>
       <select id="queryall" resultType="student">
           select * from student
       </select>
       <!-- 查询单挑数据 -->
     <select id="query" resultType="student">
         select * from student where name=#{name}
     </select>
     <delete id="delete" parameterType="java.lang.Integer">
         delete from student where id=#{id}
     </delete>
     <!-- 修改一条数据 -->
     <update id="update" parameterType="student">
         update student set name=#{name},password=#{password},truename=#{truename},sex=#{sex} where id=#{id}
     </update>
     <!-- 查询单个对象 -->
     <select id="queryone" resultType="student" parameterType="java.lang.Integer">
         select * from student where id=#{id}
     </select>
     <select id="date" resultType="java.sql.Date">
         select sysdate from dual
     </select>
 </mapper>

Service:

 package service;

 import java.util.List;

 import entity.Student;

 public interface StudentService {
     //注册账户
     public void regester(Student stu);
     //展示所有数据
     public List<Student> showall();
     //登录用户
     public Student login(String name);
     //删除一个用户
     public void delete(Integer id);
     //修改数据
     public void update(Student stu);
     //查询单条数据
     public Student query(Integer id);
     //查询日期
     public String found();
 }

Serviceimpl:

 package service;

 import java.text.SimpleDateFormat;
 import java.util.List;

 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;

 import dao.StudentDAO;
 import entity.Student;

 @Service
 //为原始类对象添加事务（额外功能）
 @Transactional
 public class StudentServiceimpl implements StudentService{
     /*
      * 原始类对象：原始方法，调用dao和编写逻辑代码
      * */
     //将DAO接口定义成这个类中的成员变量
     @Autowired
     private StudentDAO dao;

     public StudentDAO getDao() {
         return dao;
     }
     //注册一条数据
     public void setDao(StudentDAO dao) {
         this.dao = dao;
     }

     public void regester(Student stu){
         System.out.println(stu);
         dao.insert(stu);
     }

     //展示所有数据
     public List<Student> showall(){
         List<Student> list = dao.queryall();
         return list;
     }

     //注册方法
     public Student login(String name){
         Student s = dao.query(name);
         return s;
     }

     //删除一条数据
     public void delete(Integer id){
         dao.delete(id);
     }

     //修改一条数据
     public void update(Student stu){
         dao.update(stu);
     }

     //查询一条数据
     public Student query(Integer id){
         Student s = dao.queryone(id);
         return s;
     }

     //展示日期
     public String found(){
         java.sql.Date date = dao.date();
         //转换成为java date
         java.util.Date da = new java.util.Date(date.getTime());
         SimpleDateFormat Format = new SimpleDateFormat("yyyy-MM-dd");
         String s = Format.format(da);
         return s;
     }
 }

Controller层

Student:

 package action;

 import java.util.List;

 import javax.servlet.http.HttpServletRequest;

 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;

 import entity.Student;
 import service.StudentService;

 //添加@Controller注解指定这个类对象是我们的控制器
 @Controller
 //为控制器添加url访问路径名称
 @RequestMapping("/student")
 public class StudentController {
     /*
      * 1.收集数据  2.调用service层方法 3.流程跳转
      */
     @Autowired
     private StudentService service;

     public StudentService getService() {
         return service;
     }

     public void setService(StudentService service) {
         this.service = service;
     }

     @RequestMapping("/add")
     public String add(Student stu){
         System.out.println("---------------------------");
         System.out.println(stu);
         System.out.println(service);
         service.regester(stu);
         System.out.println("---------------------------");
         return "login";
     }

     //展示所有数据到jsp页面上
     @RequestMapping("/show")
     public String show(HttpServletRequest request){
         System.out.println("-----------------------------");
         List<Student> list = service.showall();
         request.setAttribute("list", list);
         System.out.println("-----sfhfgthftg--------------------------");
         return "emplist";
     }

     //登录控制器
     @RequestMapping("/login")
     public String login(Student stu,HttpServletRequest request,String code) {
         System.out.println("--------------------------");
         //通过页面传来的name 去数据库中查询一个对象返回
         Student student = service.login(stu.getName());
         //存入一个标记到作用域中,作为强制登录的判断条件
         request.getSession().setAttribute("key",student);
         // 判断student对象是否为空
         if (student != null) {
             if(request.getSession().getAttribute("code").equals(code)){
             if (student.getPassword().equals(stu.getPassword())) {
                 System.out.println("_---------------登录成功");
                 return "forward:/student/show.do";
             } else {
                 System.out.println("密码错误-----------------");
                 return "login";
             }
             }else{
                 System.out.println("验证码错误====================");
                 return "login";
             }
         } else {
             System.out.println("============================用户不存在");
             return "register";
         }

     }

     // 删除一条数据
     @RequestMapping("/delete")
     public String delete(int id,HttpServletRequest request){
         if(request.getSession().getAttribute("key")!=null){
         service.delete(id);
         return "forward:/student/show.do";}else{
             return "login";
         }
     }

     //修改一条数据
     @RequestMapping("/update")
     public String update(Student stu){
         service.update(stu);
         return "forward:/student/show.do";
     }
     //查询单个对象，并存入作用域跳转到修改页面
     @RequestMapping("/select")
     public String select(HttpServletRequest request){
         String i = request.getParameter("id");
         //字符串转换int
         int id = Integer.parseInt(i);
         Student student = service.query(id);
         request.setAttribute("student",student);
         return "updateEmp";
     }
 }

Code:

 package action;

 import java.awt.image.BufferedImage;
 import java.io.IOException;
 import java.io.PrintWriter;

 import javax.imageio.ImageIO;
 import javax.imageio.stream.ImageOutputStream;
 import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletResponse;
 import javax.servlet.http.HttpSession;

 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;

 import util.SecurityCode;
 import util.SecurityImage;

 //添加注解使这个类对象成为控制器
 @Controller
 @RequestMapping("/code")
 public class CodeController {
     //固定public String
     @RequestMapping("/code")
     public void img(HttpServletResponse response, HttpSession session) throws IOException {
         // 获得验证码字符串
         String cool = SecurityCode.getSecurityCode();
         // 将验证码字符串存入到session作用域中,目的是为了判断时有条件可依
         session.setAttribute("code", cool);
         // 将验证码字符串组装拼接成验证码图片
         BufferedImage image = SecurityImage.createImage(cool);
         // 响应到客户端
         ServletOutputStream out = response.getOutputStream();
         // 打印输出验证码到页面中
         ImageIO.write(image, "png", out);
     }
 }

Util

securityCode:

 package util;

 import java.util.Arrays;

 /**
  *
  * @author others
  * date:2014-8-26  下午2:17:19
  * 描述：随机生成验证码值：验证码串
  */
 public class SecurityCode {
     /**
      * 验证码难度级别
      *   Simple-数字
      *   Medium-数字和小写字母
      *   Hard-数字和大小写字母
      */
     public enum SecurityCodeLevel {
         Simple, Medium, Hard
     };
     /**
      * 产生默认验证码，4位中等难度
      *
      * @return
      */
     public static String getSecurityCode() {
         return getSecurityCode(3, SecurityCodeLevel.Medium, false);
     }
     /**
      * 产生长度和难度任意的验证码
      *
      * @param length
      * @param level
      * @param isCanRepeat
      * @return
      */
     private static String getSecurityCode(int length, SecurityCodeLevel level, boolean isCanRepeat) {
         // 随机抽取len个字符
         int len = length;
         // 字符集合（--除去易混淆的数字0,1,字母l,o,O）
         char[] codes = {
                  '2', '3', '4', '5', '6', '7', '8', '9',
                 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
                 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',  'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
         };
         // 根据不同难度截取字符串
         if (level == SecurityCodeLevel.Simple) {
             codes = Arrays.copyOfRange(codes, 0, 10);
         } else if (level == SecurityCodeLevel.Medium) {
             codes = Arrays.copyOfRange(codes, 0, 36);
         }
         // 字符集和长度
         int n = codes.length;
         // 抛出运行时异常
         if (len > n && isCanRepeat == false) {
             throw new RuntimeException(String.format("调用SecurityCode.getSecurityCode(%1$s,%2$s,%3$s)出现异常，" + "当isCanRepeat为%3$s时，传入参数%1$s不能大于%4$s", len, level, isCanRepeat, n));
         }
         // 存放抽取出来的字符
         char[] result = new char[len];
         // 判断能否出现重复字符
         if (isCanRepeat) {
             for (int i = 0; i < result.length; i++) {
                 // 索引0 and n-1
                 int r = (int) (Math.random() * n);
                 // 将result中的第i个元素设置为code[r]存放的数值
                 result[i] = codes[r];
             }
         } else {
             for (int i = 0; i < result.length; i++) {
                 // 索引0 and n-1
                 int r = (int) (Math.random() * n);
                 // 将result中的第i个元素设置为code[r]存放的数值
                 result[i] = codes[r];
                 // 必须确保不会再次抽取到那个字符，这里用数组中最后一个字符改写code[r],并将n-1
                 codes[r] = codes[n - 1];
                 n--;
             }
         }
         return String.valueOf(result);
     }
     public static void main(String[] args) {
         System.out.println(SecurityCode.getSecurityCode());
     }
 }

securityImage:

 package util;

 import java.awt.Color;
 import java.awt.Font;
 import java.awt.Graphics2D;
 import java.awt.image.BufferedImage;
 import java.util.Random;

 public class SecurityImage {
     /**
      * 生成验证码图片
      *
      * @param securityCode
      *
      * @return
      *
      */
     public static BufferedImage createImage(String securityCode) {

         int codeLength = securityCode.length();// 验证码长度

         int fontSize = 30;// 字体大小

         int fontWidth = fontSize + 1;

         // 图片宽高

         int width = codeLength * fontWidth + 4;

         int height = fontSize * 1 + 1;

         // 图片

         BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

         Graphics2D g = image.createGraphics();

         g.setColor(Color.WHITE);// 设置背景色

         g.fillRect(0, 0, width, height);// 填充背景

         g.setColor(Color.LIGHT_GRAY);// 设置边框颜色

         g.setFont(new Font("Arial", Font.BOLD, height - 2));// 边框字体样式

         g.drawRect(0, 0, width - 1, height - 1);// 绘制边框

         // 绘制噪点

         Random rand = new Random();

         g.setColor(Color.LIGHT_GRAY);

         for (int i = 0; i < codeLength * 6; i++) {

             int x = rand.nextInt(width);

             int y = rand.nextInt(height);

             g.drawRect(x, y, 1, 1);// 绘制1*1大小的矩形

         }

         // 绘制验证码

         int codeY = height - 10;

         g.setColor(new Color(19, 148, 246));

         g.setFont(new Font("Georgia", Font.BOLD, fontSize));
         for (int i = 0; i < codeLength; i++) {
             double deg = new Random().nextDouble() * 20;
             g.rotate(Math.toRadians(deg), i * 16 + 13, codeY - 7.5);
             g.drawString(String.valueOf(securityCode.charAt(i)), i * 16 + 5, codeY);
             g.rotate(Math.toRadians(-deg), i * 16 + 13, codeY - 7.5);
         }

         g.dispose();// 关闭资源

         return image;

     }

 }

Test：

 package test;

 import java.util.List;

 import org.junit.Test;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;

 import service.StudentService;
 import dao.StudentDAO;
 import entity.Student;

 public class StudentTest {
     @Test
     public void test(){
         ApplicationContext ctx = new ClassPathXmlApplicationContext("/applicationContext.xml");
         //通过接口名首字母小写作为beanid拿到的就是接口的实现类对象
         StudentDAO dao = (StudentDAO)ctx.getBean("studentDAO");
         //dao.insert(new Student(10,"张明明","zmm","张明明","男"));
         /*Student s = new Student();
         s.setId(11);
         s.setName("樊小明");
         s.setPassword("fxm");
         dao.insert(s);*/
         /*List<Student> list = dao.queryall();
         for(Student student : list){
             System.out.println(student);
         }*/
         //Student s = dao.query("张玉贤");
         //System.out.println(s);
         //dao.delete(17);
         dao.update(new Student(1,"贾克斯","jks","jia","男"));
         //Student s = dao.queryone(8);
         //System.out.println(s);

     }
     @Test
     public void test2(){
         ApplicationContext ctx = new ClassPathXmlApplicationContext("/applicationContext.xml");
         StudentService s = (StudentService)ctx.getBean("studentServiceimpl");
         //s.regester(new Student(15,"金克斯","jks"));
         /*List<Student> list = s.showall();
          for(Student student : list){
          System.out.println(student);
         }*/
         //s.update(new Student(19,"老司机","lsj"));
         //String ss = s.found();
         //System.out.println(ss);

     }
 }

jsp

Register:

 <%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>
 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 <c:set var="baseurl" value="${pageContext.request.contextPath}"></c:set>
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <head>
 <title>regist</title>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <link rel="stylesheet" type="text/css" href="${baseurl}/css/style.css" />
 </head>
 <body>
     <div id="wrap">
         <div id="top_content">
             <div id="header">
                 <div id="rightheader">
                     <p>
                         <script type="text/javascript">
                               var date=new Date();
         //toLocaleString()   获取本地时间格式的方法
         document.write(date.toLocaleString());
         document.write("<hr size='3' color='blue'>");
                         </script><br />
                     </p>
                 </div>
                 <div id="topheader">
                     <h1 id="title">
                         <a href="#">main</a>
                     </h1>
                 </div>
                 <div id="navigation"></div>
             </div>
             <div id="content">
                 <p id="whereami"></p>
                 <h1>注册</h1>
                 <form action="${pageContext.request.contextPath}/student/add.do"
                     method="post">
                     <table cellpadding="0" cellspacing="0" border="0"
                         class="form_table">
                         <tr>
                             <td valign="middle" align="right">用户名:</td>
                             <td valign="middle" align="left"><input type="text"
                                 class="inputgri" name="name" /></td>
                         </tr>
                         <tr>
                             <td valign="middle" align="right">真实姓名:</td>
                             <td valign="middle" align="left"><input type="text"
                                 class="inputgri" name="truename" /></td>
                         </tr>
                         <tr>
                             <td valign="middle" align="right">密码:</td>
                             <td valign="middle" align="left"><input type="password"
                                 class="inputgri" name="password" /></td>
                         </tr>
                         <tr>
                             <td valign="middle" align="right">性别:</td>
                             <td valign="middle" align="left">男 <input type="radio"
                                 class="inputgri" name="sex" value="男" checked="checked" /> 女 <input
                                 type="radio" class="inputgri" name="sex" value="女" />
                             </td>
                         </tr>

                     </table>
                     <p>
                         <input type="submit" class="button" value="Submit &raquo;" />
                     </p>
                 </form>
             </div>
         </div>
         <div id="footer">
             <div id="footer_bg">ABC@126.com</div>
         </div>
     </div>
 </body>
 </html>

Login:

 <%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>
 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 <c:set var="baseurl" value="${pageContext.request.contextPath}"></c:set>
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <head>
 <title>login</title>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <link rel="stylesheet" type="text/css" href="${baseurl}/css/style.css" />
 </head>

 <body>
     <div id="wrap">
         <div id="top_content">
             <div id="header">
                 <div id="rightheader">
                     <p>
                         <script type="text/javascript">
                               var date=new Date();
         //toLocaleString()   获取本地时间格式的方法
         document.write(date.toLocaleString());
         document.write("<hr size='3' color='blue'>");
                         </script><br />
                     </p>
                 </div>
                 <div id="topheader">
                     <h1 id="title">
                         <a href="#">main</a>
                     </h1>
                 </div>
                 <div id="navigation"></div>
             </div>
             <div id="content">
                 <p id="whereami"></p>
                 <h1>login</h1>
                 <form action="${pageContext.request.contextPath}/student/login.do"
                     method="post">
                     <table cellpadding="0" cellspacing="0" border="0"
                         class="form_table">
                         <tr>
                             <td valign="middle" align="right">username:</td>
                             <td valign="middle" align="left"><input type="text"
                                 class="inputgri" name="name" /></td>
                         </tr>
                         <tr>
                             <td valign="middle" align="right">password:</td>
                             <td valign="middle" align="left"><input type="password"
                                 class="inputgri" name="password" /></td>
                         </tr>
                         <tr>
                             <td valign="middle" align="right">验证码:<img id="num" src="${pageContext.request.contextPath}/code/code.do" /></td>
                             <td> <input type="text" name="code" /></td>
                         </tr>
                     </table>
                     <p align="left">
                         <input type="submit" class="button" value="登陆 &raquo;"
                             style="height: 26px; " />
                     </p>
                 </form>
             </div>
         </div>
         <div id="footer">
             <div id="footer_bg">ABC@126.com</div>
         </div>
     </div>
 </body>
 </html>

Update:

 <%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>
 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 <c:set var="baseurl" value="${pageContext.request.contextPath}"></c:set>
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <head>
 <title>update Emp</title>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <link rel="stylesheet" type="text/css" href="${baseurl}/css/style.css" />
 </head>

 <body>
     <div id="wrap">
         <div id="top_content">
             <div id="header">
                 <div id="rightheader">
                     <p>
                         <script type="text/javascript">
                               var date=new Date();
         //toLocaleString()   获取本地时间格式的方法
         document.write(date.toLocaleString());
         document.write("<hr size='3' color='blue'>");
                         </script><br />
                     </p>
                 </div>
                 <div id="topheader">
                     <h1 id="title">
                         <a href="#">Main</a>
                     </h1>
                 </div>
                 <div id="navigation"></div>
             </div>
             <div id="content">
                 <p id="whereami"></p>
                 <h1>updateEmp info:</h1>
                 <form action="${pageContext.request.contextPath}/student/update.do"
                     method="post">
                     <table cellpadding="0" cellspacing="0" border="0"
                         class="form_table">
                         <tr>
                             <td valign="middle" align="right">id:</td>
                             <td valign="middle" align="left"><input type="text"
                                 class="inputgri" name="id" value="${requestScope.student.id}" readonly="readonly"/></td>
                         </tr>
                         <tr>
                             <td valign="middle" align="right">name:</td>
                             <td valign="middle" align="left"><input type="text"
                                 class="inputgri" name="name" value="${requestScope.student.name}" /></td>
                         </tr>
                         <tr>
                             <td valign="middle" align="right">truename:</td>
                             <td valign="middle" align="left"><input type="text"
                                 class="inputgri" name="truename"
                                 value="${requestScope.student.truename}" /></td>
                         </tr>
                         <tr>
                             <td valign="middle" align="right">password:</td>
                             <td valign="middle" align="left"><input type="text"
                                 class="inputgri" name="password"
                                 value="${requestScope.student.password}" /></td>
                         </tr>
                         <tr>
                             <td valign="middle" align="right">sex:</td>
                             <td valign="middle" align="left"><input type="text"
                                 class="inputgri" name="sex" value="${requestScope.student.sex}" /></td>
                         </tr>
                     </table>
                     <p>
                         <input type="submit" class="button" value="修改" />
                     </p>
                 </form>
             </div>
         </div>
         <div id="footer">
             <div id="footer_bg">ABC@126.com</div>
         </div>
     </div>
 </body>
 </html>

Emplist:

 <%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>
 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 <c:set var="baseurl" value="${pageContext.request.contextPath}"></c:set>
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <head>
 <title>emplist</title>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <link rel="stylesheet" type="text/css" href="${baseurl}/css/style.css" />
 </head>
 <body>
     <div id="wrap">
         <div id="top_content">
             <div id="header">
                 <div id="rightheader">
                     <p>
                         <script type="text/javascript">
                               var date=new Date();
         //toLocaleString()   获取本地时间格式的方法
         document.write(date.toLocaleString());
         document.write("<hr size='3' color='blue'>");
                         </script><br />
                     </p>
                 </div>
                 <div id="topheader">
                     <h1 id="title">
                         <a href="#">main</a>
                     </h1>
                 </div>
                 <div id="navigation"></div>
             </div>
             <div id="content">
                 <p id="whereami"></p>
                 <h1>Welcome!</h1>
             <h1>尊敬的用户:${sessionScope.key.name}</h1>
                 <table class="table">
                     <tr class="table_header">
                         <td>ID</td>
                         <td>Name</td>
                         <td>Password</td>
                         <td>Truename</td>
                         <td>Sex</td>
                         <td>Operation</td>
                     </tr>

             <c:forEach var="student" items="${list}">
             <tr>
                 <td>${student.id}</td>
                 <td>${student.name}</td>
                 <td>${student.password}</td>
                 <td>${student.truename}</td>
                 <td>${student.sex}</td>
                 <td>
                 <a href="${pageContext.request.contextPath}/student/delete.do?id=${student.id}">删除</a>&nbsp;&nbsp;
                 <a href="${pageContext.request.contextPath}/student/select.do?id=${student.id}">修改</a>
                 </td>
             </tr>
         </c:forEach>

                 </table>
             </div>
         </div>
         <div id="footer">
             <div id="footer_bg">ABC@126.com</div>
         </div>
     </div>
 </body>
 </html>

结束语：

刚开始接触这个课题时，感觉很多问题接踵而至，不知所措，但是，在自己的努力和别人的帮助下下，还是成功了，心里很开心，很充实。这个课题研究的意义是,对数据库进行增删改查操作，这个课题给我带来了很大的收获。我在当中也学到了很多精神，刻苦奋斗，锲而不舍。人生不会再有第二个大学，我很珍惜在大学里的一切，也很怀念这一切。活在当下，珍惜当下，充实当下。