一个简单的java web项目 仅实现添加

连接数据库已经进行判断

要求：

1登录账号：要求由6到12位字母、数字、下划线组成，只有字母可以开头；（1分）

2登录密码：要求显示“• ”或“*”表示输入位数，密码要求八位以上字母、数字组成。（1分）

3性别：要求用单选框或下拉框实现，选项只有“男”或“女”；（1分）

4学号：要求八位数字组成，前四位为“2018”开头，输入自己学号；（1分）

5姓名：输入自己的姓名；

5电子邮箱：要求判断正确格式xxxx@xxxx.xxxx；（1分）

6点击“添加”按钮，将学生个人信息存储到数据库中。（3分）

7可以演示连接上数据库。（2分）

bean包

package text.jsp.bean;
public class UserBean {
private String id;
private String password;
private String sex;
private String name;
private String number;
private String mail;
private String yuan;
private String xi;
private String classes;
private String time;
private String place;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getPassword() {
return password;
}
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 getNumber() {
return number;
}
public void setNumber(String number) {
this.number = number;
}
public String getMail() {
return mail;
}
public void setMail(String mail) {
this.mail = mail;
}
public String getYuan() {
return yuan;
}
public void setYuan(String yuan) {
this.yuan = yuan;
}
public String getXi() {
return xi;
}
public void setXi(String xi) {
this.xi = xi;
}
public String getClasses() {
return classes;
}
public void setClasses(String classes) {
this.classes = classes;
}
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}
public String getPlace() {
return place;
}
public void setPlace(String place) {
this.place = place;
}
public UserBean(String id,String password,String sex,String name,String number,String mail,String yuan,String xi,String classes,String time,String place){
this.id=id;
this.password=password;
this.sex=sex;
this.name=name;
this.number=number;
this.mail=mail;
this.yuan=yuan;
this.xi=xi;
this.classes=classes;
this.time=time;
this.place=place;
}
}

　　dao包

package text.jsp.dao;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import text.jsp.bean.UserBean;
import text.jsp.util.DBUtil;public class UserDao {
public boolean add(UserBean user) {
String sql = "insert into text1021(id,password,sex,name,number,mail,yuan,xi,classes,time,place) values('" + user.getId() + "','" + user.getPassword() + "','" + user.getSex()  + "','" + user.getName()  + "','" + user.getNumber()  + "','" + user.getMail() + "','" + user.getYuan() +"','"+user.getXi() + "','" +user.getClasses() + "','" +user.getTime() + "','" + user.getPlace()+"')";
DBUtil  db=new DBUtil();
Connection conn =  db.getCon();//   ÷
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;
}}

　　util包

package text.jsp.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;public class DBUtil
{
private static Connection con;
    private static Statement stm;
    private static ResultSet rs;
private static String classname="com.mysql.cj.jdbc.Driver";
private static String url="jdbc:mysql://localhost:3306/gs?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT&&useSSL=false&&allowPublicKeyRetrieval=true";
public  Connection getCon(){
    try{
    Class.forName(classname);
    System.out.println("驱动加载成功");
    }
    catch(ClassNotFoundException e){
    e.printStackTrace();
    }
    try{
        con=DriverManager.getConnection(url,"root","123456");
        System.out.println("数据库连接成功");    }
    catch(Exception e){
        e.printStackTrace(System.err);
    con=null;
    }
    return con;
    }
public static void close(Statement stm, Connection conn) {
if(stm!=null) {
try {
stm.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(conn!=null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}public static void close(ResultSet rs, Statement stm, Connection con) {
if(rs!=null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(stm!=null) {
try {
stm.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(con!=null) {
try {
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}

　　servlet包

package text.jsp.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 text.jsp.dao.UserDao;
import text.jsp.bean.UserBean;/**
 * Servlet implementation class textservlet
 */
@WebServlet("/textservlet")
public class textservlet extends HttpServlet {
private static final long serialVersionUID = 1L;    /**
     * @see HttpServlet#HttpServlet()
     */
    public textservlet() {
        super();
        // TODO Auto-generated constructor stub
    }
    UserDao userDao=new UserDao();
/**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 */
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("textml;charset=UTF-8");
response.setHeader("content-type", "textml;charset=UTF-8");
 String id=request.getParameter("gs1");
 String password=request.getParameter("gs2");
 String sex=request.getParameter("p");
 String name=request.getParameter("gs4");
 String number=request.getParameter("gs5");
 String mail=request.getParameter("gs6");
 String yuan=request.getParameter("gs7");
 String xi=request.getParameter("gs8");
 String classes=request.getParameter("gs9");
 String time=request.getParameter("p2");
 String place=request.getParameter("gs11");
 UserBean userbean=new UserBean( id, password, sex, name, number, mail, yuan, xi, classes, time, place);
 if(userDao.add(userbean)) {
request.getRequestDispatcher("success.jsp").forward(request,response);
}
else {
request.getRequestDispatcher("fail.jsp").forward(request,response);
}
}/**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 */
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}}

　　jsp文件

<%@ 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>
<body>
<form  method="post" action="textservlet" onsubmit="return check()">
<div >
<label for="gs1">登录账号:</label>
<input type="text" id="gs1" placeholder="请输入用户名"  name="gs1">
</div>
<div >
<label for="gs2">登录密码:</label>
<input type="password" id="gs2" placeholder="请输入密码" class="input-text input-long" name="gs2">
</div>
<div >
<label for="gs3">姓   别:</label>
<select name="p">
  <option value ="nan">男</option>
  <option value ="nv">女</option>
<select>
</div>
<div >
<label for="gs4"  >姓   名:</label>
<input type="text" id="gs4" placeholder="请输入姓名" class="input-text input-long" name="gs4">
</div>
<div >
<label for="gs5"  >学   号:</label>
<input type="text" id="gs5" placeholder="请输入学号" class="input-text input-long" name="gs5">
</div>
<div >
<label for="gs6"  >电子邮件:</label>
<input type="text" id="gs6" placeholder="请输入邮件" class="input-text input-long" name="gs6">
</div>
<div >
<label for="gs7"  >所在学院:</label>
<input type="text" id="gs7" placeholder="请输入所在学院" class="input-text input-long" name="gs7">
</div>
<div >
<label for="gs8"  >所在系:</label>
<input type="text" id="gs8" placeholder="请输入所在系" class="input-text input-long" name="gs8">
</div>
<div >
<label for="gs9"  >所在班级:</label>
<input type="text" id="gs9" placeholder="请输入所在班级" class="input-text input-long" name="gs9">
</div>
<div >
<label for="gs10">入学年份(届):</label>
<select name="p2">
  <option value ="2014">2014</option>
  <option value ="2015">2015</option>
   <option value ="2016">2016</option>
  <option value ="2017">2017</option>
   <option value ="2018">2018</option>
  <option value ="2019">2019</option>
<select>
</div>
<div >
<label for="gs11"  >生源地:</label>
<input type="text" id="gs11"  name="gs11">
</div>
<div >
<label for="gs12"  >备注:</label>
<input type="text" id="gs12"  name="gs12">
</div>
<div>
<input type="submit" id="xuan" name="xuan" value="添加">
</div>
</form>
<!-- 输入字段验证部分 -->
<script type="text/javascript">
function check(){
var username=document.getElementById("gs1");
var password=document.getElementById("gs2");
var number=document.getElementById("gs5");
var mail=document.getElementById("gs6");
var sReg = /[_a-zA-Z\d\-\.]+@[_a-zA-Z\d\-]+(\.[_a-zA-Z\d\-]+)+$/; //正则表达式
//判断用户名位数
if((username.value).length<6||(username.value).length>12){
alert('账号请输入6到12位英文字符或数字，以英文字母开头');
gs1.focus();
return false;
}
//判断用户名是否包含汉字
if(/.*[\u4e00-\u9fa5]+.*$/.test(username.value)){
alert('账号用户名不能包含汉字');
gs1.focus();
return false;
}
//判断用户名是否以英文字母开头
if(!isNaN(username.value[0])){
alert('登录账号请以英文字母开头');
gs1.focus();
return false;
}
//判断密码位数
if((password.value).length!=8){
alert('密码应为8位英文或数字');
gs2.focus();
return false;
}
//判断学号是否以2018开头
     if(number.value<"20180000"|| number.value>"20189999")
{
 alert(" 学号由2018开头的八位组成");
             gs5.focus();
             return false;
}//验证手机号是否合法//判断邮箱格式是否正确
if(! sReg.test(mail.value)){
alert('邮箱格式错误');
gs6.focus();
return false;
}
}
</script>
<!-- 验证结束 -->
</body>
</html>