JAVAWEB之增删改查

青年志愿者服务网（20分）

 

1、项目需求：

为了适应社会主义市场经济发展的需要，推动青年志愿服务体系和多层次社会保障体系的建立和完善，促进青年健康成长，石家庄铁道大学急需建设青年志愿者服务网，推进石家庄铁道大学青年志愿者事业发展。

2.系统要求与功能设计

2.1 页面功能要求

（1）能够在Tomcat服务器中正确部署，并通过浏览器查看；（1分）

（2）网站页面整体风格统一；

图1 青年志愿者信息管理系统功能结构图

（3）主页面：要求显示志愿者登记、修改志愿者信息、删除志愿者信息、查询志愿者信息，志愿者信息浏览五个子菜单。（1分）

（4）志愿者登记页面：（5分）

①完成添加志愿者个人信息登记，基本信息如下表所示

姓    名		性别		民    族
注册时间		年龄		政治面貌
服务类别 （最多四项）	扶危济困   敬老助残   社区服务   秩序维护   文体服务 环境保护   治安防范   医疗救治   法律援助   大型活动 心理疏导   精神抚慰   支教支医   科学普及   应急救援 便民服务   民事调解   文明引导   安全生产   禁毒宣传

②性别要求采用单选框形式，选项包括“男”、“女”两项；

③政治面目要求采用下拉框选择，选项内容包括“群众”、“共青团员”、“中共党员”三项。

④服务类别采用多选框形式选择，最多选择四项服务类别。

⑤点击“提交”按钮，保存成功则跳转到志愿者基本信息浏览界面，新录入的信息置顶显示。失败则提示错误信息，返回当前页面

评分标准：

①完成志愿者登记页面（未完成0分，完成1分）

②保存志愿者信息入库（未完成0分，完成1分）

③性别单选框录入（未完成0分，完成0.5分）

④ 政治面目下拉框录入（未完成0分，完成0.5分）

⑤服务类别多选框录入功能（未完成0分，完成0.5分）

⑥服务类别限制最多四项选项功能；（未完成0分，完成0.5分）

⑦提交后页面跳转功能；（未完成0分，完成1分）

（5）修改志愿者个人信息页面：

输入志愿者姓名，显示其余信息，可对性别、政治面目、服务类别进行修改。（性别、政治面目、服务类别必须符合录入要求）；如果该名志愿者信息数据库不存在，则提示“该志愿者信息不存在”。（3分）

评分标准：

①完成修改志愿者个人信息页面（未完成0分，完成0.5分）

② 实现数据库中信息更新（未完成0分，完成1分）

③修改信息判断是否符合要求。（未完成0分，完成0.5分）

④输入姓名，显示其余信息，若该信息不存在，提示错误信息；（未完成0分，完成1分）

（6）删除志愿者信息页面：录入志愿者姓名，显示详细信息后，点击“删除”按钮，弹出提示框，提示“是否确认删除该志愿者信息”，确认后删除该信息。（2分）

评分标准：

①输入志愿者姓名可显示其余信息。（未完成0分，完成0.5分）

②提示确认信息。（未完成0分，完成0.5分）

③对应删除数据库中信息（未完成0分，完成1分）

（7）浏览志愿者信息页面：（2分）

以列表形式显示志愿者基本信息，结果列表中显示姓名、性别，民族、政治面目基本信息，点击姓名，可以跳转到个人详细信息。

①实现以列表形式显示志愿者基本信息，结果列表中显示姓名、性别，民族、政治面目基本信息（未完成0分，完成1分）

②实现跳转个人详细信息页面。（未完成0分，完成1分）

（8）查询志愿者信息页面：（3分）

要求可以根据志愿者姓名、性别、民族、政治面目、服务类别、注册时间六种条件实现模糊查询，输出结果以列表形式显示，显示姓名、性别，民族、政治面目基本信息，点击列表中的姓名，跳转到志愿者个人详细信息页面。

评分标准：

①缺少一种查询条件扣除0.5分。（未完成0分，完成3分）

2.2 功能要求

（1）设计出合理的数据库和数据表，要求使用mysql、sqlserver、oracle三种数据库中一种（1分）

（2）使用Serverlet实现页面交互（1分）。

（3）使用Java Bean封装数据库连接操作（1分。）

思路：

这是一个简单的增删改查项目，只要理解其中的调用关系，其实并不是太难！！！

说一下我的项目的内容：一共有五个层（Dao,entity,service,servlet,util）

　　　　　　

所有的jsp就是上图所示的

//Teenager.java

package entity;

public class Teenager {
private int id;
private String name;
private String sex;
private String minzu;
private String shijian;
private String age;
public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public String getSex() {
    return sex;
}
public void setSex(String sex) {
    this.sex = sex;
}
public String getMinzu() {
    return minzu;
}
public void setMinzu(String minzu) {
    this.minzu = minzu;
}
public String getShijian() {
    return shijian;
}
public void setShijian(String shijian) {
    this.shijian = shijian;
}
public String getAge() {
    return age;
}
public void setAge(String age) {
    this.age = age;
}
public String getMianmao() {
    return mianmao;
}
public void setMianmao(String mianmao) {
    this.mianmao = mianmao;
}
public String getFuwu() {
    return fuwu;
}
public void setFuwu(String fuwu) {
    this.fuwu = fuwu;
}
private String mianmao;
private String fuwu;
public Teenager(int id, String name, String sex, String minzu, String shijian, String age, String mianmao,
        String fuwu) {
    super();
    this.id = id;
    this.name = name;
    this.sex = sex;
    this.minzu = minzu;
    this.shijian = shijian;
    this.age = age;
    this.mianmao = mianmao;
    this.fuwu = fuwu;
}
public Teenager(String name, String sex, String minzu, String shijian, String age, String mianmao, String fuwu) {
    super();
    this.name = name;
    this.sex = sex;
    this.minzu = minzu;
    this.shijian = shijian;
    this.age = age;
    this.mianmao = mianmao;
    this.fuwu = fuwu;
}
public Teenager() {}
}

//TeenagerDao

package Dao;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import entity.Teenager;
import util.DBUtil;
public class TeenagerDao {

    public boolean add(Teenager ten)
    {
        String sql="insert into teenager(name,sex,minzu,shijian,age,mianmao,fuwu)values"
                + "('" + ten.getName() + "','" + ten.getSex() + "','" + ten.getMinzu() + "','" + ten.getShijian() + "','" + ten.getAge() + "','" + ten.getMianmao() + "','" + ten.getFuwu() + "')";
        //创建数据库链接
        Connection conn=DBUtil.getConn();
        Statement state=null;
        boolean f=false;
        int a = 0;
        try {
            state = conn.createStatement();
            state.executeUpdate(sql);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            //关闭连接
            DBUtil.close(state, conn);
        }
        if(a>0)
            f=true;
        return f;
    }

    public Teenager getbyname(String name) {
        String sql = "select * from teenager where name ='" + name + "'";
        Connection conn = DBUtil.getConn();
        Statement state = null;
        ResultSet rs = null;
        Teenager ten = null;

        try {
            state = conn.createStatement();
            rs = state.executeQuery(sql);
            while (rs.next()) {
                int id=rs.getInt("id");
                String sex2 = rs.getString("sex");
                String minzu2 = rs.getString("minzu");
                String age=rs.getString("age");
                String mianmao2 = rs.getString("mianmao");
                String fuwu2 =rs.getString("fuwu");
                String shijian2=rs.getString("shijian");
                ten = new Teenager(id,name, sex2, minzu2,shijian2,age,mianmao2,fuwu2);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(rs, state, conn);
        }

        return ten;
    }

    //delete
        public boolean delete(String name)
        {
            String sql="delete from teenager where name='" + name + "'";
            Connection conn = DBUtil.getConn();
            Statement state = null;
            int a = 0;
            boolean f = false;
            try {
                state = conn.createStatement();
                a = state.executeUpdate(sql);
            } catch (SQLException e) {
                e.printStackTrace();
            } finally {
                DBUtil.close(state, conn);
            }

            if (a > 0) {
                f = true;
            }
            return f;
        }
        //update
        public boolean update(Teenager ten)
        {
            String sql="update teenager set name='" + ten.getName() + "',sex='" + ten.getSex() + "',minzu='" + ten.getMinzu() + "',shijian='" + ten.getShijian() + "',age='" + ten.getAge() + "',mianmao='" + ten.getMianmao() + "',fuwu='" + ten.getFuwu()
            + "' where id='" + ten.getId() + "'";
             Connection conn = DBUtil.getConn();
                Statement state = null;
                boolean f = false;
                int a = 0;

                try {
                    state = conn.createStatement();
                    a = state.executeUpdate(sql);
                } catch (SQLException e) {
                    e.printStackTrace();
                } finally {
                    DBUtil.close(state, conn);
                }

                if (a > 0) {
                    f = true;
                }
                return f;
        }
        //姓名不得重复
        public boolean name(String name) {
            boolean flag = false;
            String sql = "select name from teenager where name = '" + name + "'";
            Connection conn = DBUtil.getConn();
            Statement state = null;
            ResultSet rs = null;

            try {
                state = conn.createStatement();
                rs = state.executeQuery(sql);
                while (rs.next()) {
                    flag = true;
                }
            } catch (SQLException e) {
                e.printStackTrace();
            } finally {
                DBUtil.close(rs, state, conn);
            }
            return flag;
        }

        //查找
        public List<Teenager> search(String name,String sex,String minzu,String mianmao,String fuwu,String shijian)
        {
            String sql = "select * from teenager where ";
            if (name != "") {
                sql += "name like '%" +name+ "%'";
            }
            if (sex != "") {
                sql += "sex like '%" +sex+ "%'";
            }
            if(minzu!="") {
                sql+="minzu like '%"+minzu+ "%'";
            }
            if(mianmao!="") {
                sql+="mianmao like '%" +mianmao+ "%'";
            }
            if(fuwu!="") {
                sql+="fuwu like '%" +fuwu+ "%'";
            }
            if(shijian!="") {
                sql+="shijian like '%" +shijian+ "%'";
            }
            List<Teenager> list = new ArrayList<>();
            Connection conn = DBUtil.getConn();
            Statement state = null;
            ResultSet rs = null;
            Teenager bean = null;
            try {
                state = conn.createStatement();
                rs = state.executeQuery(sql);
                while (rs.next()) {
                    String name2=rs.getString("name");
                    String sex2 = rs.getString("sex");
                    String minzu2 = rs.getString("minzu");
                    String age=rs.getString("age");
                    String mianmao2 = rs.getString("mianmao");
                    String fuwu2 =rs.getString("fuwu");
                    String shijian2=rs.getString("shijian");
                    bean =new Teenager(name2, sex2, minzu2,shijian2,age,mianmao2,fuwu2);
                    list.add(bean);
                }
            } catch (SQLException e) {
                e.printStackTrace();
            } finally {
                DBUtil.close(rs, state, conn);
            }

            return list;
        }
        //全部数据
        public List<Teenager> list()
        {
            String sql = "select * from teenager";
            List<Teenager> list = new ArrayList<>();
            Connection conn = DBUtil.getConn();
            Statement state = null;
            ResultSet rs = null;

            try {
                state = conn.createStatement();
                rs = state.executeQuery(sql);
                while (rs.next()) {
                    Teenager bean = null;
                    int id=rs.getInt("id");
                    String name2=rs.getString("name");
                    String sex2 = rs.getString("sex");
                    String minzu2 = rs.getString("minzu");
                    String age=rs.getString("age");
                    String mianmao2 = rs.getString("mianmao");
                    String fuwu2 =rs.getString("fuwu");
                    String shijian2=rs.getString("shijian");
                    bean =new Teenager(id,name2, sex2, minzu2,shijian2,age,mianmao2,fuwu2);
                    list.add(bean);
                }
            } catch (SQLException e) {
                e.printStackTrace();
            } finally {
                DBUtil.close(rs, state, conn);
            }

            return list;
        }
}

//TeenagerService

package service;
import java.util.List;

import Dao.TeenagerDao;
import entity.Teenager;
public class TeenagerService {
    TeenagerDao tDao=new TeenagerDao();
    public boolean add(Teenager ten)
    {
        boolean f = false;
        if(!tDao.name(ten.getName()))
        {
            tDao.add(ten);
            f=true;
        }
        return f;
    }

    public boolean del(String name)
    {
        tDao.delete(name);
        return true;
    }

    public boolean update(Teenager ten)
    {
        tDao.update(ten);
        return true;
    }

    public Teenager getbyname(String name)
    {
        return tDao.getbyname(name);
    }

    public List<Teenager> search(String name,String sex,String minzu,String mianmao,String fuwu,String shijian) {
        return tDao.search(name, sex,minzu,mianmao,fuwu,shijian);
    }

    //查找所有人
    public List<Teenager> list()
    {
        return tDao.list();
    }
}

//TeenagerServlet

package servlet;
import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import entity.Teenager;
import service.TeenagerService;
@WebServlet("/TeenagerServlet")
public class TeenagerServlet extends HttpServlet{
    private static final long serialVersionUID = 1L;

    TeenagerService service = new TeenagerService();

    /**
     * 方法选择
     */
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("utf-8");
        String method = req.getParameter("method");

        if ("add".equals(method)) {
            add(req, resp);
        } else if ("del".equals(method)) {
            del(req, resp);
        } else if ("update".equals(method)) {
            update(req, resp);
        } else if ("search".equals(method)) {
            search(req, resp);
        } else if ("list".equals(method)) {
            list(req, resp);
        } else if("getbyname".equals(method)) {
            getbyname(req,resp);
        }else if("getbyname2".equals(method)) {
            getbyname2(req,resp);
        }
    }

    private void getbyname(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        Teenager ten = service.getbyname(name);
        if(ten==null)
        {
            req.setAttribute("message", "未找到该学生");
            req.getRequestDispatcher("del.jsp").forward(req, resp);
        }
        else
        {
            req.setAttribute("ten", ten);
            req.getRequestDispatcher("del2.jsp").forward(req,resp);
        }
    }

    private void getbyname2(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        Teenager ten = service.getbyname(name);
        if(ten==null)
        {
            req.setAttribute("message", "未找到该学生");
            req.getRequestDispatcher("xiugai.jsp").forward(req, resp);
        }
        else
        {
            req.setAttribute("ten", ten);
            req.getRequestDispatcher("update.jsp").forward(req,resp);
        }
    }

    private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
        req.setCharacterEncoding("utf-8");
        //获取数据
        String name=req.getParameter("name");
        String sex = req.getParameter("sex");

        String minzu = req.getParameter("minzu");
        String shijian = req.getParameter("shijian");
        String age =req.getParameter("age");
        String mianmao=req.getParameter("mianmao");

        String [] fuwus = req.getParameterValues("fuwu");
           StringBuffer buf = new StringBuffer();
           for(String fuwu :   fuwus){
              buf.append(fuwu);
          }
          String fuwu = buf.toString();
        Teenager ten =new Teenager(name, sex, minzu,shijian,age,mianmao,fuwu);
        //添加后消息显示
        if(service.add(ten)) {
            req.setAttribute("message", "添加成功");
            req.getRequestDispatcher("TeenagerServlet?method=list").forward(req,resp);
        } else {
            req.setAttribute("message", "姓名重复，请重新录入");
            req.getRequestDispatcher("add.jsp").forward(req,resp);
        }
    }

    private void list(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");

        List<Teenager> tens = service.list();
        req.setAttribute("tens", tens);
        req.getRequestDispatcher("list.jsp").forward(req,resp);
    }

    private void del(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name=req.getParameter("name");
        service.del(name);
        req.setAttribute("message", "删除成功！");
        req.getRequestDispatcher("del.jsp").forward(req,resp);
    }

    private void update(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        int id = Integer.parseInt(req.getParameter("id"));
        String name=req.getParameter("name");
        String sex = req.getParameter("sex");
        String minzu = req.getParameter("minzu");
        String shijian = req.getParameter("shijian");
        String age =req.getParameter("age");
        String mianmao=req.getParameter("mianmao");
        int num=0;
        String [] fuwus = req.getParameterValues("fuwu");
           StringBuffer buf = new StringBuffer();
           for(String fuwu :   fuwus){
              buf.append(fuwu);
              num++;
          }
          String fuwu = buf.toString();
          if(num>4)
          {
                  req.setAttribute("message", "服务类别不得超过四个");
                req.getRequestDispatcher("TeenagerServlet?method=getbyname2").forward(req,resp);
          }
        Teenager ten =new Teenager(id,name, sex, minzu,shijian,age,mianmao,fuwu);
        service.update(ten);
        req.setAttribute("message", "修改成功");
        req.getRequestDispatcher("TeenagerServlet?method=list").forward(req,resp);
    }

    private void search(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name=req.getParameter("name");
        String sex = req.getParameter("sex");

        String minzu = req.getParameter("minzu");
        String shijian = req.getParameter("shijian");
        String mianmao=req.getParameter("mianmao");
        String fuwu=req.getParameter("fuwu");
        List<Teenager> tens = service.search(name, sex,minzu,mianmao,fuwu,shijian);
        if(tens==null)
        {
            req.setAttribute("message", "没有该学生");
            req.getRequestDispatcher("search.jsp").forward(req,resp);
        }
        else {
        req.setAttribute("tens", tens);
        req.getRequestDispatcher("list2.jsp").forward(req,resp);
        }
    }

}

//DBUtil

package util;

//���ݿ�����
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

/**
* ���ݿ����ӹ���
* @author Zheng
*
*/
public class DBUtil {

    public static String db_url = "jdbc:mysql://localhost:3306/text?useSSL=false";
    public static String db_user = "root";
    public static String db_pass = "fengge666";

    public static Connection getConn () {
        Connection conn = null;

        try {
            Class.forName("com.mysql.jdbc.Driver");//��������
            conn = DriverManager.getConnection(db_url, db_user, db_pass);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return conn;
    }

    /**
     * �ر�����
     * @param state
     * @param conn
     */
    public static void close (Statement state, Connection conn) {
        if (state != null) {
            try {
                state.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

    public static void close (ResultSet rs, Statement state, Connection conn) {
        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if (state != null) {
            try {
                state.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

}

index.jsp主界面

<%@ 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>
<style type="text/css">
          *{margin:0;padding:0;}/*去掉页面样式*/
          body{
          background-color:pink;
          text-align:center;
          }
          .content{
             background-color:#66FFFF;
             position:absolute;/*绝对定位*/
             top:10%;
             left:0;
             width:100%;
             height:800px;
         }
         .main{
             text-align:center;/*文本居中*/
             max-width:600px;
             height:400px;
             padding:50px 0px;/*上下80px,左右为0*/
             /*background:yellow;*//*验证div的位置*/
             margin:0 auto;/*设置上右下左,居中显示*/
         }

         .main h1{
             font-family:"楷体";/*设置字体*/
             font-size:70px;/*设置字体大小*/
             font-weight:2px;/*调整字体粗细*/
         }
         form{
             padding:0px 0;
         }
         form a{
         text-decoration:none;/*去除下划线*/
         color:pink;
         font-size:50px;
         font-family:"楷体";
         font-weight:2px;
         }
         body p{
         padding:15px 0;
         color:brown;
         font-size:35px;
         font-family:"楷体";
         font-weight:2px;
         }
         form input{
             border:1px solid white;
             margin:0px auto 10px auto;/*上 右  下 左*/
             padding:10px;
             width:220px;
             border-radius:30px;/*H5设置圆角边框*/
             font-size:18px;
             font-weight:300;
             text-align:center; /*光标输入中间*/
         }
         form label{
         font-size:30px;
         }
         form input:hover{
             background-color:#66FFFF;
         }
         form button{
             border:5px solid white;
             background-color:#66FF00;
             border-radius:10px;
             border:0;
             height:30px;
             width:145px;
             padding:5px 10px;
             margin-align:center;

         }
         form button:hover{
             background-color:#66FFFF;
         }
     </style>

<body>
<p>主界面</p>
    <div class="content" align="center">
        <div class="main">
            <form>
                <a href="add.jsp">学生信息添加</a>
                <br>
                <br>
                <a href="xiugai.jsp">学生信息修改</a>
                <br><br>
                <a href="del.jsp">学生信息删除</a>
                <br><br>
                <a href="search.jsp">学生信息查询</a>
                <br><br>
                <a href="TeenagerServlet?method=list">学生信息显示</a>
            </form>
          </div>
    </div>
</body>
</html>

add.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>
<style type="text/css">
          *{margin:0;padding:0;}/*去掉页面样式*/
          body{
          padding:20px 0px;
          background-color:pink;
          text-align:center;
          }
          .content{
             background-color:#66FFFF;
             position:absolute;/*绝对定位*/
             top:10%;
             left:0;
             width:100%;
             height:800px;
         }
         body a{
         color:brown;
         font-size:35px;
         font-family:"楷体";
         font-weight:2px;
         text-decoration:none;
         }
         .main{
             text-align:center;/*文本居中*/
             max-width:600px;
             height:400px;
             padding:50px 0px;/*上下80px,左右为0*/
             /*background:yellow;*//*验证div的位置*/
             margin:0 auto;/*设置上右下左,居中显示*/
         }

         .main h1{
             font-family:"楷体";/*设置字体*/
             font-size:70px;/*设置字体大小*/
             font-weight:2px;/*调整字体粗细*/
         }
         form{
             padding:0px 0;
         }
         form td{
         text-decoration:none;/*去除下划线*/
         color:#EA7500;
         font-size:35px;
         font-family:"楷体";
         font-weight:2px;
         }

         form input{
             border:none;
             margin:0px auto 10px auto;/*上 右  下 左*/
             padding:10px;
             width:220px;
             border-radius:30px;/*H5设置圆角边框*/
             font-size:18px;
             font-family:"楷体";
             font-weight:300;
             text-align:center; /*光标输入中间*/
         }
         form label{
         font-size:30px;
         }
         form input:hover{
             background-color:#984B4B;
         }
         form button{
             border:5px solid white;
             background-color:#66FF00;
             border-radius:10px;
             border:0;
             height:30px;
             width:145px;
             padding:5px 10px;
             margin-align:center;

         }
         form button:hover{
             background-color:#66FFFF;
         }
         .radio{
    display: inline-block;
    position: relative;
    line-height: 18px;
    margin-right: 10px;
    cursor: pointer;
}
.radio input{
    display: none;
}
.radio .radio-bg{
    display: inline-block;
    height: 18px;
    width: 18px;
    margin-right: 5px;
    padding: 0;
    background-color: #45bcb8;
    border-radius: 100%;
    vertical-align: top;
    box-shadow: 0 1px 15px rgba(0, 0, 0, 0.1) inset, 0 1px 4px rgba(0, 0, 0, 0.1) inset, 1px -1px 2px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.2s ease;
}
.radio .radio-on{
    display: none;
}
.radio input:checked + span.radio-on{
    width: 10px;
    height: 10px;
    position: absolute;
    border-radius: 100%;
    background: #FFFFFF;
    top: 4px;
    left: 4px;
    box-shadow: 0 2px 5px 1px rgba(0, 0, 0, 0.3), 0 0 1px rgba(255, 255, 255, 0.4) inset;
    background-image: linear-gradient(#ffffff 0, #e7e7e7 100%);
    transform: scale(0, 0);
    transition: all 0.2s ease;
    transform: scale(1, 1);
    display: inline-block;
}
.shortselect{
    background:#fafdfe;
    height:28px;
    width:180px;
    line-height:28px;
    border:1px solid #9bc0dd;
    -moz-border-radius:2px;
    -webkit-border-radius:2px;
    border-radius:2px;
}  

     </style>

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

     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>

<a href="index.jsp">返回主页</a>
    <div class="content">
        <div class="main">
        <form name="form" action="TeenagerServlet?method=add" method="post" >
            <table>
                <tr>
                    <td>姓名</td>
                    <td><input type="text" id="name" name="name" placeholder="Name" /></td>
                </tr>
                <tr>
                    <td>性别</td>
                    <td>
                        <label for="man" class="radio">
                        <span class="radio-bg"></span>
                        <input type="radio" name="sex" id="man" value="男" checked="checked" /> 男
                        <span class="radio-on"></span>
                        </label>
                        <label for="woman" class="radio">
                        <span class="radio-bg"></span>
                        <input type="radio" name="sex" id="woman" value="女" /> 女
                        <span class="radio-on"></span>
                        </label>
                    </td>
                </tr>
                <tr>
                    <td>民族</td>
                    <td><input type="text" id="minzu" name="minzu" /></td>
                </tr>
                <tr>
                    <td>注册时间</td>
                    <td><input type="text" id="shijian" name="shijian" /></td>
                </tr>
                <tr>
                    <td>年龄</td>
                    <td><input type="text" id="age" name="age" /></td>
                </tr>
                <tr>
                    <td>政治面貌</td>
                    <td>
                        <select name="mianmao" class="shortselect">
                            <option>群众</option>
                            <option>共青团员</option>
                            <option>中共党员</option>
                        </select>
                    </td>
                </tr>
                <tr>
                    <td>服务类别</td>
                    <td>
                    <input type="checkbox" id="fuwu" name="fuwu" onClick="doCheck(this)" value="扶危济困" />扶危济困
                    <input type="checkbox" id="fuwu" name="fuwu" onClick="doCheck(this)" value="敬老助残" />敬老助残
                    <input type="checkbox" id="fuwu" name="fuwu" onClick="doCheck(this)" value="社区服务" />社区服务
                    <input type="checkbox" id="fuwu" name="fuwu" onClick="doCheck(this)" value="环境保护" />环境保护
                    <input type="checkbox" id="fuwu" name="fuwu" onClick="doCheck(this)" value="心理疏导" />心理疏导
                    <input type="checkbox" id="fuwu" name="fuwu" onClick="doCheck(this)" value="便民服务" />便民服务
                    <input type="checkbox" id="fuwu" name="fuwu" onClick="doCheck(this)" value="科学普及" />科学普及

                    </td>
                </tr>
                <tr>
                    <td><input type="submit" value="提交" /></td>
                    <td><input type="reset" value="重置" /></td>
                </tr>
            </table>
        </form>
<script type="text/javascript">
    var num=0;
    function doCheck(ctrl) {
        if(ctrl.checked){
        num++;
        } else {
        num--;
        }
        if (num> 4) {
        ctrl.checked = false;
        num--;
        window.alert('最多可以选择4组');
        }
        }
</script>
        </div>
    </div>
</body>
</html>

del.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>
<style type="text/css">
          *{margin:0;padding:0;}/*去掉页面样式*/
          body{
          padding:20px 0px;
          background-color:pink;
          text-align:center;
          }
          .content{
             background-color:#66FFFF;
             position:absolute;/*绝对定位*/
             top:10%;
             left:0;
             width:100%;
             height:800px;
         }
         body h{
         color:brown;
         font-size:35px;
         font-family:"楷体";
         font-weight:2px;
         text-decoration:none;
         }
         .main{
             text-align:center;/*文本居中*/
             max-width:600px;
             height:400px;
             padding:10px 0px;/*上下80px,左右为0*/
             /*background:yellow;*//*验证div的位置*/
             margin:0 auto;/*设置上右下左,居中显示*/
         }

         .main a{
             text-decoration:none;/*去除下划线*/
             font-family:"楷体";/*设置字体*/
             font-size:25px;/*设置字体大小*/
             font-weight:2px;/*调整字体粗细*/
         }
         form input,td{
             border:1px solid white;
             margin:0px auto 10px auto;/*上 右  下 左*/
             padding:10px;
             width:220px;
             border-radius:30px;/*H5设置圆角边框*/
             font-size:18px;
             font-weight:300;
             text-align:center; /*光标输入中间*/
         }
         form label{
         font-size:30px;
         }
         form input:hover{
             background-color:#66FFFF;
         }

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

     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
<script type="text/javascript">
function check(form)
{
    var name=form.name.value;
    if(name=="")
    {
        alert("名称不能为空");
        form.name.focus();
        return false;
    }
}
</script>
<h align="center">删除学生</h>
<div class="content">
    <div class="main">
    <a href="index.jsp">返回主页</a>
    <br><br>
        <form name="form" action="TeenagerServlet?method=getbyname" method="post" onsubmit="return check(form)">
                <a>学生姓名:</a>&nbsp;&nbsp;<input type="text" id="name" name="name" />
                <br><br>
                <input type="submit" value="删除" />
        </form>
        </div>
    </div>
</body>
</html>

del2.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>
<style type="text/css">
          *{margin:0;padding:0;}/*去掉页面样式*/
          body{
          padding:20px 0px;
          background-color:pink;
          text-align:center;
          }
          .content{
             background-color:#66FFFF;
             position:absolute;/*绝对定位*/
             top:10%;
             left:0;
             width:100%;
             height:800px;
         }
         body h{
         color:brown;
         font-size:35px;
         font-family:"楷体";
         font-weight:2px;
         text-decoration:none;
         }
         .main{
             text-align:center;/*文本居中*/
             max-width:600px;
             height:400px;
             padding:10px 0px;/*上下80px,左右为0*/
             /*background:yellow;*//*验证div的位置*/
             margin:0 auto;/*设置上右下左,居中显示*/
         }

         .main a{
             text-decoration:none;/*去除下划线*/
             font-family:"楷体";/*设置字体*/
             font-size:30px;/*设置字体大小*/
             font-weight:2px;/*调整字体粗细*/
         }
         table {
                width: 100%;
                background: #ccc;
                margin: 10px auto;
                border-collapse: collapse;/*border-collapse:collapse合并内外边距(去除表格单元格默认的2个像素内外边距*/
            }
            th,td {
                height: 25px;
                line-height: 25px;
                text-align: center;
                border: 1px solid #ccc;
            }
            th {
                background: #eee;
                font-weight: normal;
            }
            tr {
                background: #fff;
            }
            tr:hover {
                background: #FF8000;
            }
            td a {
                color: #06f;
                text-decoration: none;
            }
            td a:hover {
                color: #06f;
                text-decoration: underline;
            }
            form input{
             border:1px solid white;
             margin:0px auto 10px auto;/*上 右  下 左*/
             padding:10px;
             width:220px;
             border-radius:30px;/*H5设置圆角边框*/
             font-size:18px;
             font-weight:300;
             text-align:center; /*光标输入中间*/
         }
         form label{
         font-size:30px;
         }
         form input:hover{
             background-color:#66FFFF;
         }
     </style>
</head>
<body>
<h>课程信息删除</h>
    <div class="content">
        <div class="main">
        <a href="index.jsp">返回主页</a>
        <table>
            <tr>
                <td>姓名</td>
                <td>${ten.name }</td>
            <tr>
            <tr>
                <td>性别</td>
                <td>${ten.sex }</td>
            <tr>
            <tr>
                <td>民族</td>
                <td>${ten.minzu }</td>
            <tr>
            <tr>
                <td>注册时间</td>
                <td>${ten.shijian }</td>
            <tr>
            <tr>
                <td>年龄</td>
                <td>${ten.age }</td>
            <tr>
            <tr>
                <td>政治面貌</td>
                <td>${ten.mianmao }</td>
            <tr>
            <tr>
                <td>服务种类</td>
                <td>${ten.fuwu }</td>
            <tr>
        </table>
        <form action="TeenagerServlet?method=del" method="post" onsubmit="return check();">
        <input type="hidden" id="name" name="name" value="${ten.name}">
           <input type="submit" name="action1" value="确定删除">
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            if (confirm("真的要删除吗？")){
                return true;
            }else{
                return false;
            }
        }
    </script>
</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>
<style type="text/css">
          *{margin:0;padding:0;}/*去掉页面样式*/
          body{
          padding:20px 0px;
          background-color:pink;
          text-align:center;
          }
          .content{
             background-color:#66FFFF;
             position:absolute;/*绝对定位*/
             top:10%;
             left:0;
             width:100%;
             height:800px;
         }
         body h{
         color:brown;
         font-size:35px;
         font-family:"楷体";
         font-weight:2px;
         text-decoration:none;
         }
         .main{
             text-align:center;/*文本居中*/
             max-width:600px;
             height:400px;
             padding:10px 0px;/*上下80px,左右为0*/
             /*background:yellow;*//*验证div的位置*/
             margin:0 auto;/*设置上右下左,居中显示*/
         }

         .main a{
         text-decoration:none;/*去除下划线*/
             font-family:"楷体";/*设置字体*/
             font-size:30px;/*设置字体大小*/
             font-weight:2px;/*调整字体粗细*/
         }
         table {
                width: 100%;
                background: #ccc;
                margin: 10px auto;
                border-collapse: collapse;/*border-collapse:collapse合并内外边距(去除表格单元格默认的2个像素内外边距*/
            }
            th,td {
                height: 25px;
                line-height: 25px;
                text-align: center;
                border: 1px solid #ccc;
            }
            th {
                background: #eee;
                font-weight: normal;
            }
            tr {
                background: #fff;
            }
            tr:hover {
                background: #FF8000;
            }
            td a {
                color: #06f;
                text-decoration: none;
            }
            td a:hover {
                color: #06f;
                text-decoration: underline;
            }
     </style>
</head>
<body>
<%
          Object message = request.getAttribute("message");
          if(message!=null && !"".equals(message)){

     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
     <h>学生信息列表</h>
    <div class="content">
        <div class="main">
        <a href="index.jsp">返回主页</a>
        <table align="center">
            <tr>
                <th>姓名</th>
                <th>性别</th>
                <th>民族</th>
                <th>注册时间</th>
                <th>年龄</th>
                <th>政治面貌</th>
                <th>服务类别</th>
            </tr>
                <c:forEach items="${tens}" var="item">
                <tr>
                    <td><a href="TeenagerServlet?method=getbyname&&name=${item.name}">${item.name}</a></td>
                    <td>${item.sex}</td>
                    <td>${item.minzu}</td>
                    <td>${item.shijian}</td>
                    <td>${item.age }</td>
                    <td>${item.mianmao }</td>
                    <td>${item.fuwu }</td>
                </tr>
                </c:forEach>
        </table>
    </div>
</body>
</html>

list2.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>
<style type="text/css">
          *{margin:0;padding:0;}/*去掉页面样式*/
          body{
          padding:20px 0px;
          background-color:pink;
          text-align:center;
          }
          .content{
             background-color:#66FFFF;
             position:absolute;/*绝对定位*/
             top:10%;
             left:0;
             width:100%;
             height:800px;
         }
         body h{
         color:brown;
         font-size:35px;
         font-family:"楷体";
         font-weight:2px;
         text-decoration:none;
         }
         .main{
             text-align:center;/*文本居中*/
             max-width:600px;
             height:400px;
             padding:10px 0px;/*上下80px,左右为0*/
             /*background:yellow;*//*验证div的位置*/
             margin:0 auto;/*设置上右下左,居中显示*/
         }

         .main a{
         text-decoration:none;/*去除下划线*/
             font-family:"楷体";/*设置字体*/
             font-size:30px;/*设置字体大小*/
             font-weight:2px;/*调整字体粗细*/
         }
         table {
                width: 100%;
                background: #ccc;
                margin: 10px auto;
                border-collapse: collapse;/*border-collapse:collapse合并内外边距(去除表格单元格默认的2个像素内外边距*/
            }
            th,td {
                height: 25px;
                line-height: 25px;
                text-align: center;
                border: 1px solid #ccc;
            }
            th {
                background: #eee;
                font-weight: normal;
            }
            tr {
                background: #fff;
            }
            tr:hover {
                background: #FF8000;
            }
            td a {
                color: #06f;
                text-decoration: none;
            }
            td a:hover {
                color: #06f;
                text-decoration: underline;
            }
     </style>
</head>
<body>
<%
          Object message = request.getAttribute("message");
          if(message!=null && !"".equals(message)){

     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
     <h>学生信息列表</h>
    <div class="content">
        <div class="main">
        <a href="index.jsp">返回主页</a>
        <table align="center">
            <tr>
                <th>姓名</th>
                <th>性别</th>
                <th>民族</th>
                <th>注册时间</th>
                <th>年龄</th>
                <th>政治面貌</th>
                <th>服务类别</th>
            <tr>
                <c:forEach items="${tens}" var="item">
                <tr>
                    <td><a href="TeenagerServlet?method=getbyname&&name=${item.name}">${item.name}</a></td>
                    <td>${item.sex}</td>
                    <td>${item.minzu}</td>
                    <td>${item.shijian}</td>
                    <td>${item.age }</td>
                    <td>${item.mianmao }</td>
                    <td>${item.fuwu }</td>
                </tr>
                </c:forEach>
        </table>
    </div>
</body>
</html>

search.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>
<style type="text/css">
          *{margin:0;padding:0;}/*去掉页面样式*/
          body{
          padding:20px 0px;
          background-color:pink;
          text-align:center;
          }
          .content{
             background-color:#66FFFF;
             position:absolute;/*绝对定位*/
             top:10%;
             left:0;
             width:100%;
             height:800px;
         }
         body h{
         color:brown;
         font-size:35px;
         font-family:"楷体";
         font-weight:2px;
         text-decoration:none;
         }
         .main{
             text-align:center;/*文本居中*/
             max-width:600px;
             height:400px;
             padding:10px 0px;/*上下80px,左右为0*/
             /*background:yellow;*//*验证div的位置*/
             margin:0 auto;/*设置上右下左,居中显示*/
         }

         .main a{
         text-decoration:none;/*去除下划线*/
             font-family:"楷体";/*设置字体*/
             font-size:30px;/*设置字体大小*/
             font-weight:2px;/*调整字体粗细*/
         }
         form input,td{
             border:1px solid white;
             margin:0px auto 10px auto;/*上 右  下 左*/
             padding:10px;
             width:220px;
             border-radius:30px;/*H5设置圆角边框*/
             font-size:18px;
             font-weight:300;
             text-align:center; /*光标输入中间*/
         }
         form label{
         font-size:30px;
         }
         form input:hover{
             background-color:#66FFFF;
         }

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

     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
<h>查找学生</h>
    <div class="content">
        <div class="main">
        <a href="index.jsp">返回主页面</a>
        <br><br>
        <form name="form" action="TeenagerServlet?method=search" method="post" ">
            <a>姓名</a>&nbsp;&nbsp;<input type="text" name="name" />
            <br><br>
            <a>性别</a>&nbsp;&nbsp;<input type="text" name="sex" />
            <br><br>
            <a>民族</a>&nbsp;&nbsp;<input type="text" name="minzu" />
            <br><br>
            <a>政治面貌</a>&nbsp;&nbsp;<input type="text" name="mianmao" />
            <br><br>
            <a>服务类别</a>&nbsp;&nbsp;<input type="text" name="fuwu" />
            <br><br>
            <a>注册时间</a>&nbsp;&nbsp;<input type="text" name="shijian" />
            <br><br>
            <input type="submit" value="查找" /></td>
        </form>
        </div>
    </div>
</body>
</html>

update.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>
<style type="text/css">
          *{margin:0;padding:0;}/*去掉页面样式*/
          body{
          padding:20px 0px;
          background-color:pink;
          text-align:center;
          }
          .content{
             background-color:#66FFFF;
             position:absolute;/*绝对定位*/
             top:10%;
             left:0;
             width:100%;
             height:800px;
         }
         body h{
         color:brown;
         font-size:35px;
         font-family:"楷体";
         font-weight:2px;
         text-decoration:none;
         }
         .main{
             text-align:center;/*文本居中*/
             max-width:600px;
             height:400px;
             padding:10px 0px;/*上下80px,左右为0*/
             /*background:yellow;*//*验证div的位置*/
             margin:0 auto;/*设置上右下左,居中显示*/
         }

         .main a{
         text-decoration:none;/*去除下划线*/
             font-family:"楷体";/*设置字体*/
             font-size:30px;/*设置字体大小*/
             font-weight:2px;/*调整字体粗细*/
         }
         form input,td{
             border:1px solid white;
             margin:0px auto 10px auto;/*上 右  下 左*/
             padding:10px;
             width:220px;
             border-radius:30px;/*H5设置圆角边框*/
             font-size:18px;
             font-weight:300;
             text-align:center; /*光标输入中间*/
         }
         form label{
         font-size:30px;
         }
         form input:hover{
             background-color:#66FFFF;
         }

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

     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
<h>查找学生</h>
    <div class="content">
        <div class="main">
        <a href="index.jsp">返回主页面</a>
        <br><br>
        <form name="form" action="TeenagerServlet?method=search" method="post" ">
            <a>姓名</a>&nbsp;&nbsp;<input type="text" name="name" />
            <br><br>
            <a>性别</a>&nbsp;&nbsp;<input type="text" name="sex" />
            <br><br>
            <a>民族</a>&nbsp;&nbsp;<input type="text" name="minzu" />
            <br><br>
            <a>政治面貌</a>&nbsp;&nbsp;<input type="text" name="mianmao" />
            <br><br>
            <a>服务类别</a>&nbsp;&nbsp;<input type="text" name="fuwu" />
            <br><br>
            <a>注册时间</a>&nbsp;&nbsp;<input type="text" name="shijian" />
            <br><br>
            <input type="submit" value="查找" /></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>
<style type="text/css">
          *{margin:0;padding:0;}/*去掉页面样式*/
          body{
          padding:20px 0px;
          background-color:pink;
          text-align:center;
          }
          .content{
             background-color:#66FFFF;
             position:absolute;/*绝对定位*/
             top:10%;
             left:0;
             width:100%;
             height:800px;
         }
         body h{
         color:brown;
         font-size:35px;
         font-family:"楷体";
         font-weight:2px;
         text-decoration:none;
         }
         .main{
             text-align:center;/*文本居中*/
             max-width:600px;
             height:400px;
             padding:10px 0px;/*上下80px,左右为0*/
             /*background:yellow;*//*验证div的位置*/
             margin:0 auto;/*设置上右下左,居中显示*/
         }

         .main a{
             text-decoration:none;/*去除下划线*/
             font-family:"楷体";/*设置字体*/
             font-size:25px;/*设置字体大小*/
             font-weight:2px;/*调整字体粗细*/
         }
         form input,td{
             border:1px solid white;
             margin:0px auto 10px auto;/*上 右  下 左*/
             padding:10px;
             width:220px;
             border-radius:30px;/*H5设置圆角边框*/
             font-size:18px;
             font-weight:300;
             text-align:center; /*光标输入中间*/
         }
         form label{
         font-size:30px;
         }
         form input:hover{
             background-color:#66FFFF;
         }

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

     %>
          <script type="text/javascript">
               alert("<%=request.getAttribute("message")%>");
          </script>
     <%} %>
<script type="text/javascript">
function check(form)
{
    var name=form.name.value;
    if(name=="")
    {
        alert("名称不能为空");
        form.name.focus();
        return false;
    }
}
</script>
<h align="center">修改学生</h>
<div class="content">
    <div class="main">
    <a href="index.jsp">返回主页</a>
    <br><br>
        <form name="form" action="TeenagerServlet?method=getbyname2" method="post" onsubmit="return check(form)">
                <a>姓名:</a>&nbsp;&nbsp;<input type="text" id="name" name="name" />
                <br><br>
                <input type="submit" value="查找" />
        </form>
        </div>
    </div>
</body>
</html>

页面截图：

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