java注冊界面及mysql連接

本文轉載自查看原文 2019-10-21 22:38 333

題目要求

完成注冊界面及添加功能

1登錄賬號：要求由6到12位字母、數字、下划線組成，只有字母可以開頭；（1分）

2登錄密碼：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）

3性別：要求用單選框或下拉框實現，選項只有“男”或“女”；（1分）

4學號：要求八位數字組成，前四位為“2018”開頭，輸入自己學號；（1分）

5姓名：輸入自己的姓名；

5電子郵箱：要求判斷正確格式xxxx@xxxx.xxxx；（1分）

6點擊“添加”按鈕，將學生個人信息存儲到數據庫中。（3分）

7可以演示連接上數據庫。（2分）

設計思路

頁面布局部分（.jsp）：

add.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>添加學生信息</title>

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

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

  <h2>添加學生信息</h2>
  <hr size="1" noshade color="#000000">
  <%--橫線--%>
  <form action="Servlet?method=add" method="post" id="form"
   onSubmit="return validate()">

   <table width="800" border="0" align="center">
    <%--表格的寬為800，居中對齊--%>
    <%--表格的寬為800，居中對齊--%>
   <tr>
    <td>賬號： <input type="text" name="username"></td>
   </tr>
   <tr>
    <td>密碼： <input type="password" name="password"></td>
   </tr>
   <tr>
    <td>姓名： <input type="text" name="name">
    </td>
   </tr>
   <tr>
    <td>性別:   <input id="pingtaijb" name="sex" type="checkbox"
     value="男">男 </input> <input id="pingtaijb" name="sex"
     type="checkbox" value="女" />女 </input>
    </td>
   </tr>
   <tr>
    <td>學號： <input type="text" name="num"></td>
   </tr>
   <tr>
    <td>郵箱： <input type="text" name="e_mail">
    </td>
   </tr>
   <tr>
    <td>學校： <input type="text" name="school">
    </td>
   </tr>
   <tr>
    <td>專業： <input type="text" name="zhuan">
    </td>
   </tr>
   <tr>
    <td>班級： <input type="text" name="ban">
    </td>
   </tr>
   <tr>
    <td>年份： <input type="text" name="year">
    </td>
   </tr>
   <tr>
    <td>生源地： <select name="diqu" οnchange="showUser(this.value)">
     <option value="1">北京市</option>
     <option value="2">天津市</option>
     <option value="3">河北省</option>
     <option value="4">山西省</option>
    </select>
    </td>
   </tr>
   <tr>
    <td>備注： <input type="text" name="bei">
    </td>
   </tr>
   <tr>
    <td>                          
    <input name="submit" type="submit" value="添加" />
    <input type="reset" value="重置"></td>
   </tr>
  </table>
  <p> </p>
</form>

數據庫連接部分（.java）：

DBUtil.java

package util;

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

/**
* 數據庫連接工具
* @author Hu
*
*/
public class DBUtil {

　　 public static String dbURL="jdbc:mysql://localhost:3306/test";//數據源！！！！注意若出現加載或者連接數據庫失敗一般是這里出現問題
　　public static String Name="root";
　　 public static String Pwd="123456";

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

　　　　　　try {

　　　　　　Class.forName("com.mysql.jdbc.Driver");//加載驅動
　　　　　　conn = DriverManager.getConnection(dbURL, Name, Pwd);
　　　　　　} catch (Exception e) {
   　　　　　　　　e.printStackTrace();
　　　　　　}

  　　　　　　return conn;
}

/**
* 關閉連接
* @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();
   }
  }
}

}

dao.java

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 cls.admin;
import util.DBUtil;

public class dao {

/**
* 娣誨姞
* @param course
* @return
*/
public boolean add(admin course) {
  String sql = "insert into clc(num,password,sex,name,stunum,e_mail,college,major,year,locate,beizhu) "
    + "values('" +course.getNum()+ "',"
      + "'" + course.getPassword() + "',"
        + "'" + course.getSex()+ "',"
          + "'"+ course.getName()+ "',"
            + "'"+ course.getStunum() + "'"
              + ",'" + course.getE_mail() + "',"
                + "'" + course.getCollege()+ "',"
                  + "'" +course.getMajor()+"',"
                    + "'"+course.getYear() +"',"
                      + "'"+course.getLocate()+"',"
                        + "'"+course.getBeizhu()+"')";
  Connection conn = DBUtil.getConn();
  Statement state = null;
  boolean f = false;
  int a = 0;

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

  if (a > 0) {
   f = true;
  }
  return f;
}
}

Lservice.java

package service;

import cls.admin;
import dao.dao;

/**
* CourseService
* 服務層
* @author Hu
*
*/
public class Lservice {

static dao cDao = new dao();

/**
* 添加
* @param course
* @return
*/
public static boolean add(admin course) {
  boolean f = false;

   cDao.add(course);
   f = true;

  return f;
}

}

admin.java

package cls;

public class admin {
private String num;
private String password;
private String sex;
private String name;
private String stunum;
private String e_mail;
private String college;
private String major;
private String year;
private String locate;
private String beizhu;
public String getNum() {
return num;
}
public void setNum(String num) {
this.num = num;
}
public String getPassword() {
return password;
}
public admin(String num, String password, String sex, String name, String stunum, String e_mail, String college, String major,
String year, String locate, String beizhu) {
super();
this.num = num;
this.password = password;
this.sex = sex;
this.name = name;
this.stunum = stunum;
this.e_mail = e_mail;
this.college = college;
this.major = major;
this.year = year;
this.locate = locate;
this.beizhu = beizhu;
}
public void setPassword(String password) {
this.password = password;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getStunum() {
return stunum;
}
public void setStunum(String stunum) {
this.stunum = stunum;
}
public String getE_mail() {
return e_mail;
}
public void setE_mail(String e_mail) {
this.e_mail = e_mail;
}
public String getCollege() {
return college;
}
public void setCollege(String college) {
this.college = college;
}
public String getMajor() {
return major;
}
public void setMajor(String major) {
this.major = major;
}
public String getYear() {
return year;
}
public void setYear(String year) {
this.year = year;
}
public String getLocate() {
return locate;
}
public void setLocate(String locate) {
this.locate = locate;
}
public String getBeizhu() {
return beizhu;
}
public void setBeizhu(String beizhu) {
this.beizhu = beizhu;
}
public void admin()
{
}
}

Servlet部分：

Servlet.java

package servlet;
import java.io.IOException;
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 service.Lservice;
import cls.admin;

/**
* Servlet implementation class Servlet
*/
@WebServlet("/Servlet")
public class Servlet extends HttpServlet {
private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public Servlet() {
        super();
        // TODO Auto-generated constructor stub
    }

/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
Lservice service = new Lservice();

/**
* 方法選擇
*/
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);
  }
}

/**
* 添加
* @param req
* @param resp
* @throws IOException
* @throws ServletException
*/
private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
  req.setCharacterEncoding("utf-8");
  String num = req.getParameter("num");
  String password = req.getParameter("password");
  String sex = req.getParameter("sex");
  String name = req.getParameter("name");
  String stunum = req.getParameter("stunum");
  String e_mail = req.getParameter("e_mail");
  String college = req.getParameter("college");
  String major = req.getParameter("major");
  String year = req.getParameter("year");
  String locate = req.getParameter("locate");
  String beizhu = req.getParameter("beizhu");
  admin course = new admin(num,password,sex,name,stunum,e_mail,college,major,year,locate,beizhu);

  //添加后消息顯示
  if(Lservice.add(course)) {
   req.setAttribute("message", "添加成功");
   req.getRequestDispatcher("add.jsp").forward(req,resp);
  } else {
   req.setAttribute("message", "姓名重復，請重新錄入");
   req.getRequestDispatcher("add.jsp").forward(req,resp);
  }
}
}

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