2019.10.21課堂測試

時間 2019-11-14

標籤 2019.10.21 課堂測試简体版

原文原文鏈接

1、題目要求

1登陸帳號：要求由6到12位字母、數字、下劃線組成，只有字母能夠開頭；（1分）javascript

2登陸密碼：要求顯示「• 」或「*」表示輸入位數，密碼要求八位以上字母、數字組成。（1分）html

3性別：要求用單選框或下拉框實現，選項只有「男」或「女」；（1分）java

4學號：要求八位數字組成，前四位爲「2018」開頭，輸入本身學號；（1分）mysql

5姓名：輸入本身的姓名；sql

5電子郵箱：要求正確判斷格式xxxx@xxxx.xxxx；（1分）數據庫

6點擊「添加」按鈕，將學生我的信息存儲到數據庫中。（3分）jsp

7能夠演示鏈接上數據庫。（2分）ide

2、設計思路

首先在jsp頁面進行表單數據的校驗，若是校驗不成功則提示錯誤，而後另用戶從新輸入數據，若是校驗成功，則將表單中的數據發送到servlet層，servlet層接收到數據後開始進行數據的存放，而後調用Dao層的add函數來進行數據庫的寫入，這時Dao層調用DBUtil來註冊驅動和獲取數據庫的鏈接，而後進行數據的寫入，若是寫入成功則返回true，寫入失敗則返回false，servlet層接收到Dao層的返回值後進行不一樣的處理，若是寫入成功則向註冊頁面發送註冊成功的消息，反之則發生註冊失敗的消息。函數

3、源代碼

註冊界面工具

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>註冊界面</title>
<script type="text/javascript">
/*表單校驗*/
function check() {
    f=0;
    var re =  /^[\w\u4e00-\u9fa5]{6,8}$/;  //判斷字符串是否爲數字和字母組合  
    var myPattern = new RegExp("^[a-zA-Z]"); // 以英文字母開頭
    var username = document.getElementById("username").value;
    //alert(username.length);
    if(!(username.length>5&&username.length<13)){
        alert("用戶名長度錯誤！");return false;
    }
    else if(!(re.test(username))){
        alert("用戶名組成內容錯誤！");return false;
    }else if(!(myPattern.exec(username))){
        alert("用戶名開頭必須是字母！");return false;
    }
    var password = document.getElementById("password").value;
    if(password.length<8){f++;alert("密碼長度錯誤！");}    return false;
        
    
    var xuehao = document.getElementById("xuehao").value;
    if(xuehao.length!=8){
        alert("學號長度錯誤！");return false;
    }
    if(xuehao[0]=='2'&&xuehao[1]=='0'&&xuehao[2]=='1'&&xuehao[3]=='8'){f++;}
    else{
        alert("學號格式錯誤！");return false;
    }
    
    var mail = document.getElementById("mail").value;
    if(/^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+/.test(mail)){f++;}
    else{
        alert("郵箱格式錯誤！");return false;
    }
    if(f>1){
        alert("添加成功");
        return true;
    }
    else{
        return false;
    }
    
}

</script>
</head>
<body background="1.jpg">
<form action="UserServlet?method=add" method="post" onsubmit="return check()"><br/><br/><br/><br/><br/><br/><br/>
<table align="center">
            <tr>
            <td>登入帳號：</td>
                <td><input type="text"  id="username" name="username" value="" ></td>
            </tr>
            <tr>
            <td>登入密碼：</td>
               <td> <input type="password"  id="password" name="password"  value="" ></td>
            </tr>
            <tr>
            <td>性&nbsp;&nbsp;&nbsp;&nbsp;別：</td>
               <td>
               <select id="sex" name="sex" >
                    <option>--請選擇--</option>
                        <option  value="男">男</option>
                        <option  value="女">女</option>
                    </select>
               </td>
            </tr>
            <tr>
            <td>姓&nbsp;&nbsp;&nbsp;&nbsp;名：</td>
               <td> <input type="text"  name="name"   value="" ></td>
            </tr>
            <tr>
            <td>學&nbsp;&nbsp;&nbsp;&nbsp;號：</td>
               <td> <input type="text"  name="xuehao" id="xuehao"  value="" ></td>
            </tr>
            <tr>
            <td>電子郵件：</td>
               <td> <input type="text" id="mail" name="mail"  value="" ></td>
            </tr>
            <tr>
            <td>所在學院：</td>
               <td> <input type="text" id="xueyuan" name="xueyuan"  value="" ></td>
            </tr>
            <tr>
            <td>所在系：</td>
               <td> <input type="text" id="xi" name="xi"  value="" ></td>
            </tr>
            <tr>
            <td>所在班級：</td>
               <td> <input type="text" id="ban" name="ban"  value="" ></td>
            </tr>
            <tr>
            <td>入學年份（屆）：</td>
               <td>
               <select id="year" name="year">
                    <option>--請選擇--</option>
                        
                        <option value="2018">2018</option>
                        <option value="2017">2019</option>
                        <option value="2016">2018</option>
                        <option value="2015">2019</option>
                        <option value="2014">2018</option>
                    </select>
               </td>
            </tr>
            <tr>
            <td>生源地：</td>
               <td>
               <select name="address">
               <option value ="河北省">河北省</option>
               <option value ="北京市">北京市</option>
               <option value ="天津市">天津市</option>
               </select>
               </td>
            </tr>
            <tr>
            <td>備註：</td>
               <td> <input type="text" id="beizhu" name="beizhu"  value="" ></td>
            </tr>
            <tr>
                 <td> <button type="submit" >添&nbsp;&nbsp;&nbsp;&nbsp;加</button></td>
            </tr>
        </table>
</form>
</body>
</html>

DBUtil.java

package zhuce;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;

//數據庫資源管理工具
public class DBUtil {

    private static Connection conn;
    private static Statement stmt;
    private static PreparedStatement pstmt;

    static {
        // 加載驅動
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    // 實例化數據庫鏈接conn
    public static Connection getConnection() {
        try {
            conn = DriverManager.getConnection(
                    "jdbc:mysql://localhost:3306/user?user=true&characterEncoding=UTF-8", "root", "123456");
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return conn;
    }

    // 實例化SQL執行句柄stmt
    public static Statement getStatement() {
        Connection conn = getConnection();
        try {
            if (conn != null) {
                stmt = conn.createStatement();
            }

        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return stmt;
    }

    // 實例化SQL執行句柄pstmt
    public static PreparedStatement getPreparedStatement(String sql) {
        Connection conn = getConnection();
        try {
            if (conn != null) {
                pstmt = conn.prepareStatement(sql);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return pstmt;
    }

    // 關閉數據庫鏈接資源
    public static void closeDBResources() {
        try {
            if (pstmt != null && !pstmt.isClosed()) {
                pstmt.close();
            }
            if (stmt != null && !stmt.isClosed()) {// 若是stmt不爲空，而且還未關閉
                stmt.close();
            }
            if (conn != null && !conn.isClosed()) {
                conn.close();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }

}

ZhuceDao.java

package zhuce;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import zhuce.DBUtil;

import zhuce.Zhuce;

public class ZhuceDao {
    // 保存信息
    public void saveZhuce(Zhuce zhuce) {
        String sql = "insert into zhucebiaodan(user,password,name,sex,diqu,phone,youxiang)values(?,?,?,?,?,?,?)";
        PreparedStatement pstmt = DBUtil.getPreparedStatement(sql);
        // 設置參數
        try {
            pstmt.setString(1, zhuce.getUser());
            pstmt.setString(2, zhuce.getPassword());
            pstmt.setString(3, zhuce.getName());
            pstmt.setString(4, zhuce.getSex());
            pstmt.setString(5, zhuce.getDiqu());
            pstmt.setString(6, zhuce.getPhone());
            pstmt.setString(7, zhuce.getYouxiang());
            pstmt.executeUpdate();// 更新數據
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    // 刪除學生
    public void deleteZhuce(String user) {
        String sql = "delete from zhucebiaodan where user = ? ";
        PreparedStatement pstmt = DBUtil.getPreparedStatement(sql);

        try {
            pstmt.setString(1, user);
            pstmt.executeUpdate();

        } catch (SQLException e) {

            e.printStackTrace();
        } finally {
            DBUtil.closeDBResources();
        }
    }

    // 查詢全部信息
    public static List<Zhuce> findAllZhuce() {
        List<Zhuce> zhucelist = new ArrayList<Zhuce>();
        String sql = "select user,password,name,sex,diqu,phone,youxiang from zhucebiaodan ";
        PreparedStatement pstmt = DBUtil.getPreparedStatement(sql);
        // 設置參數
        try {
            ResultSet rs = pstmt.executeQuery();// 執行獲得結果集
            while (rs.next()) {// 每循環一次就找到一個學生

                String user = rs.getString("user");
                String password = rs.getString("password");
                String name = rs.getString("name");
                String sex = rs.getString("sex");
                String diqu = rs.getString("diqu");
                String phone = rs.getString("phone");
                String youxiang = rs.getString("youxiang");
                Zhuce zhuce = new Zhuce(user, password, name, sex, diqu, phone, youxiang);
                zhucelist.add(zhuce);// 將找到的學生對象加到集合裏面
            }
            rs.close();// 關閉查詢資源
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            // 關閉資源
            DBUtil.closeDBResources();
        }
        return zhucelist;
    }

}

ZhuceServlet.java

package zhuce;

import java.io.IOException;

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

import zhuce.ZhuceService;
import zhuce.Zhuce;

public class ZhuceServlet extends HttpServlet {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        request.setCharacterEncoding("utf-8");//設置編碼
        String param=request.getParameter("param");
        
        if("add".equals(param)) {
            String user=request.getParameter("user");
            String password=request.getParameter("password");
            String name=request.getParameter("name");
            String sex=request.getParameter("sex");
            String diqu=request.getParameter("diqu");
            String phone=request.getParameter("phone");
            String youxiang=request.getParameter("youxiang");
            Zhuce zhuce=new Zhuce(user,password,name,sex,diqu,phone,youxiang);
            ZhuceService zs=new ZhuceService();
            zs.saveZhuce(zhuce);
            System.out.println("鏈接servlet");
            //重定向到index.jsp
            response.sendRedirect("index.jsp");
            
        }
        if("delete".equals(param)) {
            String user = request.getParameter("user");
            
            ZhuceService.deleteZhuce(user);

            // 重定向到index.jspt頁面
            response.sendRedirect("index.jsp");
        }
    }
    
}

ZhuceService.java

package zhuce;

import java.util.List;

import zhuce.ZhuceDao;
import zhuce.Zhuce;


public class ZhuceService {
    private static ZhuceDao zhucedao=new ZhuceDao();
    //添加信息
        public  void saveZhuce(Zhuce zhuce) {
            zhucedao.saveZhuce(zhuce);
        }
        //查詢全部信息
        public List<Zhuce> findAllZhuce(){
            return ZhuceDao.findAllZhuce();
        }
        //刪除信息
        public static void deleteZhuce(String user) {
            zhucedao.deleteZhuce(user);
        }
}