Java Web学生信息保存

Course.java
package entity;
public class Course {
    private int id;
    private String num;
    private String mima;
    private String sex;
    private String name;
    private String studentnum;
    private String youxiang;
    private String xueyuan;
    private String xi;
    private String banji;
    private String year;
    private String plase;
    private String beizhu;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getNum() {
        return num;
    }
    public void setNum(String num) {
        this.num = num;
    }
    public String getMima() {
        return mima;
    }
    public void setMima(String mima) {
        this.mima = mima;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String getStudentnum() {
        return studentnum;
    }
    public void setStudentnum(String studentnum) {
        this.studentnum = studentnum;
    }
    public String getYouxiang() {
        return youxiang;
    }
    public void setYouxiang(String youxiang) {
        this.youxiang = youxiang;
    }
    public String getXueyuan() {
        return xueyuan;
    }
    public void setXueyuan(String xueyuan) {
        this.xueyuan = xueyuan;
    }
    public String getXi() {
        return xi;
    }
    public void setXi(String xi) {
        this.xi = xi;
    }
    public String getBanji() {
        return banji;
    }
    public void setBanji(String banji) {
        this.banji = banji;
    }
    public String getYear() {
        return year;
    }
    public void setYear(String year) {
        this.year = year;
    }
    public String getPlase() {
        return plase;
    }
    public void setPlase(String plase) {
        this.plase = plase;
    }
    public String getBeizhu() {
        return beizhu;
    }
    public void setBeizhu(String beizhu) {
        this.beizhu = beizhu;
    }
    public String getName() {
        return name;
    }
    public Course() {}

    public Course( String num, String mima, String sex, String name, String studentnum, String youxiang, String xueyuan, String xi, String banji, String year, String plase, String beizhu) {

        this.num = num;
        this.mima = mima;
        this.sex = sex;
        this.name = name;
        this.studentnum = studentnum;
        this.youxiang = youxiang;
        this.xueyuan = xueyuan;
        this.xi = xi;
        this.banji = banji;
        this.year = year;
        this.plase = plase;
        this.beizhu = beizhu;
    }
}
CourseServlet.java

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.Course;
import dao.CourseDao;public class CourseServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
     public CourseServlet() {
            super();
        }
    CourseDao dao = new CourseDao();
    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);
        }
    }
    private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
        req.setCharacterEncoding("utf-8");
        String num = req.getParameter("num");
        String mima = req.getParameter("mima");
        String name = req.getParameter("name");
        String sex = req.getParameter("sex");
        String studentnum = req.getParameter("studentnum");
        String xueyuan = req.getParameter("xueyuan");
        String xi = req.getParameter("xi");
        String banji = req.getParameter("banji");
        String year = req.getParameter("year");
        String plase = req.getParameter("plase");
        String beizhu = req.getParameter("beizhu");
        String youxiang = req.getParameter("youxiang");
        Course course = new Course(num,mima,sex,name,studentnum,youxiang,xueyuan,xi,banji,year,plase,beizhu);
        //添加后消息显示
        if(dao.add(course)){
            req.setAttribute("message", "注册成功");
            req.getRequestDispatcher("index.jsp").forward(req,resp);}
        else {
            req.setAttribute("message", "注册失败");
            req.getRequestDispatcher("zhuce.jsp").forward(req,resp);}
        }
    }

CourseDao.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 entity.Course;
import util.DBUtil;
public class CourseDao {
    public boolean add(Course course) {
        String sql = "insert into information( num , mima , sex, name , studentnum, youxiang,xueyuan,xi,banji,year,plase,beizhu) values('" + course.getNum() + "','" + course.getMima() + "','" + course.getSex() +  "','" + course.getName()+"','" + course.getStudentnum()+"','" + course.getYouxiang()+"','" + course.getXueyuan()+"','" + course.getXi()+"','" + course.getBanji()+"','" + course.getYear()+"','" + course.getPlase()+"','" + 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;
    }
}

DBUtil.java

package util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class DBUtil {
    public static String db_url = "jdbc:mysql://localhost:3306/text1?useSSL=false";
    public static String db_user = "root";
    public static String db_pass = "123456";
    public static Connection getConn () {
        Connection conn = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");//加载驱动
            conn = DriverManager.getConnection(db_url, db_user, db_pass);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return 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

<%@ 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>
成功
</body>
</html>

zhucu.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>
    .a{
        margin-top: 20px;
    }
    .b{
        font-size: 20px;
        width: 160px;
        color: white;
        background-color: greenyellow;
    }
</style>
</head>
<body>
    <%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: red;">注册</h1>
            <form action="CourseServlet?method=add" method="post" onsubmit="return check()">
            <div class="a">
                登录账号<input type="text" id="num"name="num" value=""/>    

            </div>
            <div class="a">
                登录密码:<input type="password" id="mima"name="mima" value="" />
            </div>
            性别: <select name="sex" >
                <option value="男">男</option>
                <option value="女">女</option>

            </select>
            <div class="a">
                姓名:<input type="text" name="name" value="" />
            </div>
            <div class="a">
                学号:<input type="text" id="studentnum"name="studentnum" value="" />
            </div>
            <div class="a">
                电子邮件:<input type="text" id="youxiang" name="youxiang" value="" />
            </div>
          <div class="a">
            所在学院:<input type="text" name="xueyuan" value="" />
            </div>
            <div class="a">
                所在系:<input type="text" name="xi" value="" />
            </div>
            <div class="a">
                所在班级:<input type="text" name="banji" value="" />
            </div>
            入学年份（届）<select name="year">
                <option value="2016">2016</option>
                <option value="2017">2017</option>
                <option value="2018">2018</option>
                <option value="2019">2019</option>
                </select>届
            <div class="a">
                生源地:<input type="text" name="plase" value=""/>
            </div>
            <div class="a">
                备注:<textarea rows="10" cols="50" name="beizhu">
              </textarea>
            </div>
            <div class="a">
                <button type="submit" class="b">保&nbsp;&nbsp;&nbsp;存</button>
            </div>
        </form>
    </div>
<script type="text/javascript">
function check() {
    var num = document.getElementById("num");
    var mima = document.getElementById("mima");
    var studentnum = document.getElementById("studentnum");
    var youxiang = document.getElementById("youxiang");
    if (!num.value.match(/^[a-zA-Z]\w{5,11}$/)) {
        alert("用户名由六到十二英文字符和数字组成，以英文字母开头");
        num.focus();
        return false;
}
    else if (!mima.value.match(/^[A-Za-z0-9]\w{7,20}$/)) {
     alert(" 密码由八 位 以上英文 和数 字 组成");
     mima.focus();
     return false;
}
    else if(studentnum.value<"20180000"|| studentnum.value>"20189999")
        {
         alert(" 学号由2018开头的八位组成");
         studentnum.focus();
         return false;
        }
    else if (!youxiang.value.match(/^[a-z0-9]+([._\\-]*[a-z0-9])*@([a-z0-9]+[-a-z0-9]*[a-z0-9]+.){1,63}[a-z0-9]+$/)) {
     alert(" 邮箱格式错误");
     youxiang.focus();
     return false;
}
}
    </script>
</body>
</html>