课堂小测验

今天java课上要写的一个课堂作业是要链接数据库从而完成增这项功能

首先是链接到数据库

package com.con;

import java.sql.Connection;
import java.sql.DriverManager;

public class Conn {
    public Connection getCon() {
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            String url="jdbc:mysql://localhost/test1?serverTimezone=UTC";  
            String user="root";
            String password="123456";
            Connection conn=DriverManager.getConnection(url,user,password);
            System.out.println(conn.getMetaData().getURL());
            return conn;
        }catch(Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}

然后是定义变量然后编写函数

package com.mode;

public class Test {
    private    int id;
    private String username;
    private String password;
    private byte gender;
    private String name;
    private int number;
    private String email;
    private String school;
    private String department;
    private String team;
    private String year;
    private String address;
    private String remarks;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public byte getGender() {
        return gender;
    }
    public void setGender(byte gender) {
        this.gender = gender;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getNumber() {
        return number;
    }
    public void setNumber(int number) {
        this.number = number;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getSchool() {
        return school;
    }
    public void setSchool(String school) {
        this.school = school;
    }
    public String getDepartment() {
        return department;
    }
    public void setDepartment(String department) {
        this.department = department;
    }
    public String getTeam() {
        return team;
    }
    public void setTeam(String team) {
        this.team = team;
    }
    public String getYear() {
        return year;
    }
    public void setYear(String year) {
        this.year = year;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public String getRemarks() {
        return remarks;
    }
    public void setRemarks(String remarks) {
        this.remarks = remarks;
    }
    
}

在之后就是写函数读入值

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

import com.model.Test;

public class Userservice {
    private Connection conn;
    private PreparedStatement pstmt;
    public Userservice() {
        conn=new com.conn.Conn().getCon();
    }
    public boolean addUser(Test user) {
        try {
            pstmt=conn.prepareStatement("insert into test1"+"(username,password,gender,name,number,email,school,department,team,year,address,remarks)"+"values(?,?,?,?,?,?,?,?,?,?,?,?)");
            pstmt.setString(1,user.getName());
            pstmt.setString(2,user.getPassword());
            pstmt.setByte(3,user.getGender());
            pstmt.setString(4,user.getName());
            pstmt.setInt(5,user.getNumber());
            pstmt.setString(6,user.getEmail());
            pstmt.setString(7,user.getSchool());
            pstmt.setString(8,user.getDepartment());
            pstmt.setString(9,user.getTeam());
            pstmt.setString(10,user.getYear());
            pstmt.setString(11,user.getAddress());
            pstmt.setString(12,user.getRemarks());
            pstmt.executeUpdate();
            
            return true;
        }catch(SQLException e) {
            e.printStackTrace();
            return false;
        }
        
    }
}

最后是调用

package com.test;

import com.conn.Conn;

public class Test {

    public static void main(String[] args) {
        new Conn().getCon();

    }

}

然后是前端的操作

第一个是显示成功与否

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "- //W3C..DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>20173502</title>
   </head>
   <body>
   <%request.setCharacterEncoding("utf-8"); %>
   <jsp:useBean id="user" class="com.model.Test"></jsp:useBean>
   <jsp:useBean id="userservice" class="com.service.Userservice"></jsp:useBean>
   <jsp:setProperty property="*" name="user"/>
   <%
   
   
   
   
   
   
   
   
   if(userservice.addUser(user))
       out.print("success");
   else
       out.print("failure");
   %>
  
   </body>
</html>

第二个是界面设计

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "- //W3C..DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>20173502</title>
      <script type="text/javascript">
      founction check(){
          var d=document.getElementById("password").value;
          if(d.length<9)
          alert("密码长度必须8位以上！");
          }
      </script>

   </head>
   <body>
   <form action="NewFile_result.jsp" >
<table align="center">
<tr>
   <td>登录账号</td>
   <td><input type="text" name="username" pattern="[w]{6,12}"></td>
</tr>
<tr>
   <td>登录密码</td>
   <td><input type="password" name="password" id="password"  pattern="[a-zA-Z0-9_-]{8}"></td>
</tr>
<tr>
   <td align="right">性别</td>
   <td><input type="radio" name="gender" checked value="1">男&nbsp;<input type="radio" name="xb" value="0">女</td>
</tr>
<tr>
   <td align="right">姓名</td>
   <td><input type="text" name="name"></td>
</tr>
<tr>
   <td align="right">学号</td>
   <td><input type="text" name="number" pattern="2018+[0-9]{4}"></td>
</tr>
<tr>
   <td>电子邮箱</td>
   <td><input type="text" name="email" pattern="^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(.[a-zA-Z0-9_-]+)+$"></td>
</tr>
<tr>
   <td>所在学校</td>
   <td><input type="text" name="school"></td>
</tr>
<tr>
   <td align="right">所在系</td>
   <td><input type="text" name="department"></td>
</tr>
<tr>
   <td>所在班级</td>
   <td><input type="text" name="team"></td>
</tr>
<tr>
   <td>入学年份</td>
   <td><select name="year">
          <option>2016</option>
          <option>2017</option>
          <option>2018</option>
          <option>2019</option>
       </select>
   </td>
</tr>
<tr>
   <td>生源地</td>
   <td><input type="text" name="address"><td>
</tr>
<tr>
   <td>备注</td>
   <td><textarea rows="3" cols="20" name="remarks"></textarea><td>
</tr>
<tr>
   <td></td>
   <td><input type="submit" value="提交"><td>
</tr>
</table>
      

          
   </form>
   </body>
</html>