软件工程概论课堂测试一

课堂练习设计思想：先创建一个连接数据库的.Java文件，然后创建登录界面的HTML文件，然后分别在.JSP文件中编写实现登录注册的方法。

源程序代码：

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>登录</title>
<meta charset="UTF-8">
<script language="javascript">
function turn(){
    window.location.href="register.html";
}
</script>
</head>
<body>

    <center>
        <h1 style="color:orange">登录</h1>
            <form action="logincheck.jsp" method="get">
                <table border="0">
                    <tr>
                        <td>课程名称：</td>
                        <td><input type="text" name="name" required></td>
                    </tr>
                    <tr>
                        <td>任课教师：</td>
                        <td><input type="text" name="teacher" required>
                        </td>
                    </tr>
                    <tr>
                        <td>上课地点:</td>
                        <td><input type="text" name="address" required>
                        </td>
                </table>
            <br>
                <input type="submit" value="登录" style="color:#BC8F8F">
                <input type="button" value="注册" onclick="turn()" style="color:#BC8F8F">
            </form>

    </center>
</body>
</html>

logincheck.jsp

<%@ 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>
<title>登录验证</title>
</head>
<body>
<jsp:useBean id="login" class="db.Login"/>
<%
    request.setCharacterEncoding("utf-8");
    String name=(String)request.getParameter("name");
    String teacher=(String)request.getParameter("teacher");
    String address=(String)request.getParameter("address");
    if(login.ifLogin(name,teacher,address)){
        out.print("成功登陆! 登录名:"+name);
    }
    else{
        out.print("填写错误！");
    }
    login.clean();
%>
<center>
    <a href="login.html">返回</a>
</center>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>注册</title>
</head>
<body>
    <center>
        <h1 style="color:red">注册</h1>
            <form action="registercheck.jsp" method="post">
                <table border="0">
                    <tr>
                        <td>课程名称：</td>
                        <td><input type="text" name="name" required></td>
                    </tr>
                    <tr>
                        <td>任课教师：</td>
                        <td><input type="text" name="teacher" required>
                        </td>
                    </tr>
                    <tr>
                        <td>上课地点：</td>
                        <td><input type="text" name="address" required>
                        </td>
                    </tr>
                </table>
            </form>
            <br>
                <input type="submit" value="保存"  onclick="confir()" style="color:#BC8F8F">
                <input type="submit" value="返回"  onclick="back()" style="color:#BC8F8F">

    </center>
<script language="javascript">
function back(){
    window.history.back();
}
function confir(){
    var tea=document.forms[0].teacher.value;
    var add=document.forms[0].address.value;
    var n=document.forms[0].name.value;
    if(tea=="刘立嘉"||tea=="刘丹"||tea=="王建民"||tea=="杨子光"||tea=="王辉"){
        
    }
    else{
        alert("输入不符合要求！");
        break；
    }
    
        if((add.substr(0,2)=="基教")||(add.substr(0,2)=="一教")||(add.substr(0,2)=="二教")||(add.substr(0,2)=="三教"))
        {
            
            
        }
        else{
            alert("输入地点不符合要求！");
            break；
        }
        
            document.forms[0].submit();
        
    

}
</script>
</body>
</html>

regustercheck.jsp

<%@ 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>注册验证</title>

</head>
<body>
<jsp:useBean id="login" class="db.Login"/>
<%
request.setCharacterEncoding("utf-8");
String name=request.getParameter("name");
String teacher=request.getParameter("teacher");
String address=request.getParameter("address");

if(login.ifExitName(name)){

    out.print("<script language='javaScript'> alert('已存在该用户！');</script>");
    response.setHeader("refresh", "0;url=register.html");
}
else{

    login.addUser(name,teacher,address);
    out.print("<script language='javaScript'> alert('注册成功！');</script>");
    response.setHeader("refresh", "0;url=login.html");
}
login.clean();
%>
</body>
</html>

package db;

import java.sql.*;

public class Login{
    private String driverStr = "com.mysql.jdbc.Driver";
    private String connStr = "jdbc:mysql://localhost:3306/test";
    private String dbusername = "root";
    private String dbpassword = "root";
    private Connection conn = null;
    private PreparedStatement pstmt = null;

    public Login(){
        try
        {
            Class.forName(driverStr);
            conn = DriverManager.getConnection(connStr, dbusername, dbpassword);
        } 
        catch (Exception ex) {
            System.out.println("Connect Fail!");
        } 
        
    }
    public boolean ifExitName(String name) throws SQLException{
        String sql="select * from lesson where name='"+name+"'";
        pstmt=conn.prepareStatement(sql);
        ResultSet res=pstmt.executeQuery();
        if(res.next()){
            return true;
        }
        return false;
    }
    public boolean ifLogin(String userna,String tea,String add)throws SQLException{
        String sql="select * from lesson where name='"+userna+"' and teacher='"+tea+"' and address='"+add+"'";
        pstmt=conn.prepareStatement(sql);
        ResultSet res=pstmt.executeQuery();
        if(res.next()){
            return true;
        }
        else{
            return false;
        }
    }
    public void addUser(String name,String tea,String add)throws SQLException{
        if(ifExitName(name)){
            return ;
        }
        else {
            String sql = "insert into lesson values('"+name+"','" +tea+"','"+add+"')";
            pstmt=conn.prepareStatement(sql);
            int rst=pstmt.executeUpdate();
            if(rst!=0){
                System.out.println("Insert Success!");
            }
            else{
                System.out.println("Insert Fail!");
            }
        }
        
    }

    public void clean(){
        try {
            if(conn!=null){
                conn.close();
            }
            if(pstmt!=null){
                pstmt.close();
            }
        }
        catch (SQLException e) {
            System.out.println(e.getMessage());;
        }
    }
}

运行结果截图：

项目时间日志：

日期	开始时间	结束时间	净时间	活动
2017.11.28	9:10	9:30	20min	编写.Java连接数据库
2017.11.28	9:35	10:30	55min	编写login.html,logincheck.jsp
2017.11.28	10:35	11；40	1h55min	编写register.html,logincheck.jsp
2017.11.28	12:50	13:25	35min	进行优化

缺陷记录日志:

日期	编号	描述	修复时间	修复过程
2017.11.28	1	连续使用“\|\|”倒置程序判断存在bug	25min	将“！=”换为“=”并添加if else语句
2017.11.28	2	不能够精确判断上课地点	10min	使用substr函数进行

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原文地址：https://www.cnblogs.com/lwq666/p/7911464.html