小程序--课程导入

     

 1.设计思想：首先要建立一个新的数据库进行连接，数据库分别存储三列信息：课程名称（classname）、任课教师（teachername）、上课地点（building）。三类信息均为String类，在mysql里面是varchar类型；接着先写一个Class类，有三个信息的定义和其set和get方法；一个IClassDao类定义add方法；一个ClassDaoImpl类，实现add方法（在数据库中add）：1。获得链接对象   2。创建语句传输对象    3。接收遍历结果集  4。关闭资源；一个DBUtil类链接数据库：1。 加载驱动    2 。创建链接对象connection   3.关闭资源  ；一个异常类UserException；最后JSP文件：add.jsp和addInput.jsp设计界面和输入要求。

2.程序源代码：

Class.java

package com.jaovo.msg.model;

public class Class {
	
	//private int id;
	private String  classname;
	private String  teachername;
	private String  building;
	public String getTeachername() {
		return teachername;
	}
	public void setTeachername(String teachername) {
		this.teachername = teachername;
	}
	public String getClassname() {
		return classname;
	}
	public void setClassname(String classname) {
		this.classname = classname;
	}
	public String getBuilding() {
		return building;
	}
	public void setBuilding(String building) {
		this.building = building;
	}
	/*public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}*/
	
}

　　IClassDao.java

package com.jaovo.msg.dao;


import com.jaovo.msg.model.Class;


public interface IClassDao {
	public void add(Class user);	
}

　ClassDaoImpl.java

package com.jaovo.msg.dao;

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


import com.jaovo.msg.Util.DBUtil;
import com.jaovo.msg.Util.UserException;
import com.jaovo.msg.model.Class;


public class ClassDaoImpl implements IClassDao {

	@SuppressWarnings("resource")
	@Override
	public void add(Class user) {
		//获得链接对象
		Connection connection = DBUtil.getConnection();
		//准备sql语句
		//String sql = "select count(*) from t_user where classname = ?";
		//创建语句传输对象
		PreparedStatement preparedStatement = null;
		ResultSet resultSet = null;
		try {
			//preparedStatement = connection.prepareStatement(sql);
			//preparedStatement.setString(1, user.getClassname());
			//接收结果集
			//resultSet = preparedStatement.executeQuery();
			//遍历结果集
			//while(resultSet.next()) {
			//	if (resultSet.getInt(1) > 0) {
					//throw new UserException("用户已存在") ;
			//	}
			//}
			
			String sql = "insert into t_user(classname,teachername,building) value (?,?,?)";
			preparedStatement = connection.prepareStatement(sql);
			preparedStatement.setString(1, user.getClassname());
			preparedStatement.setString(2, user.getTeachername());
			preparedStatement.setString(3, user.getBuilding());
			preparedStatement.executeUpdate();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			//关闭资源
			DBUtil.close(resultSet);
			DBUtil.close(preparedStatement);
			DBUtil.close(connection);
		}
		
	}

}	

　　DBUtil.java

package com.jaovo.msg.Util;

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

public class DBUtil {
	
	public  static  Connection getConnection() {
		try {
			//1 加载驱动
			Class.forName("com.mysql.jdbc.Driver").newInstance();
		} catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		String user = "root";
		String password = "root";
		String url = "jdbc:mysql://localhost:3306/class?useUnicode=true&characterEncoding=UTF-8";
		Connection connection = null;
		try {
				//2 创建链接对象connection
			 	connection = DriverManager.getConnection(url,user,password);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return connection;
	}
	
	//关闭资源的方法
	public static void close(Connection connection ) {
		try {
			if (connection != null) {
				connection.close();
			}
			
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	public static void close(PreparedStatement preparedStatement ) {
		try {
			if (preparedStatement != null) {
				preparedStatement.close();
			}
			
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	public static void close(ResultSet resultSet ) {
		try {
			if (resultSet != null) {
				resultSet.close();
			}
			
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
}

　　UserException.java

package com.jaovo.msg.Util;

public class UserException extends RuntimeException{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	public UserException() {
		super();
		// TODO Auto-generated constructor stub
	}

	public UserException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
		super(message, cause, enableSuppression, writableStackTrace);
		// TODO Auto-generated constructor stub
	}

	public UserException(String message, Throwable cause) {
		super(message, cause);
		// TODO Auto-generated constructor stub
	}

	public UserException(String message) {
		super(message);
		// TODO Auto-generated constructor stub
	}

	public UserException(Throwable cause) {
		super(cause);
		// TODO Auto-generated constructor stub
	}
	
}

　　add.jsp

<%@page import="com.jaovo.msg.Util.UserException"%>
<%@page import="com.jaovo.msg.dao.ClassDaoImpl"%>
<%@page import="com.jaovo.msg.model.Class"%>
<%@ 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>
<%
	//接收客户端传递过来的参数
	String classname = request.getParameter("classname");
	String teachername = request.getParameter("teachername");
	String building = request.getParameter("building");
	try{
		if(!teachername.trim().equals("王建民")&&!teachername.trim().equals("刘立嘉")&&!teachername.trim().equals("刘丹")&&!teachername.trim().equals("王辉")&&!teachername.trim().equals("杨子光"))
		{
			throw new UserException("不能输入");
		}
		else if (!building.trim().startsWith("基教")&&!building.trim().startsWith("一教")&&!building.trim().startsWith("二教")&&!building.trim().startsWith("三教")&&!building.trim().startsWith("四教"))
		{
			throw new UserException("不能输入");
		}
		else 
		{
			Class user = new Class();
			user.setClassname(classname);
			user.setTeachername(teachername);
			user.setBuilding(building);
			ClassDaoImpl userDao = new ClassDaoImpl();
			userDao.add(user);
			%>
			课程保存成功!!<br>
			<a href="addInput.jsp">继续添加</a><br>
			<a href="#">课程列表</a>
					<%
		}
	}
	catch(UserException e){
		%>
			<h2 style="color:red ; font-size:50px">发生错误 : <%=e.getMessage() %></h2>
		<%
			}


	%>
</html>

　　　　addInput.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>课程登记页面</title>
</head>
<body>
	<%=request.getAttribute("error") %>
	<form action="add.jsp" method="get">
		<table align="center" border="1" width="500">
			<tr>
				<td>课程名称 : </td>
				<td>
					<input type="text" name="classname" />
				</td>
			</tr>
				<tr>
    			<td>教师名称:</td>
    			<td>
    				<input type="text" name="teachername" />
    			</td>
    		</tr>
    		<tr>
    			<td>上课地点:</td>
    			<td>
    				<input type="text" name="building" />
    			</td>
    		</tr>
    		<tr align="center">
    			<td colspan="2">
    				<input type="submit" value="保存" />
    			</td>
    		</tr>
		</table>
	</form>
</body>
</html>

3.截图：

 

4.

日期	开始时间	结束时间	中断时间	净时间	活动	备注	C	U
2017.11.28	8.00	8.50		50分钟	听课		√
	9.00	9.50		50分钟	编程		√
	13.30	14.40		70分钟	编程		√
	15.00	15.50		50分钟	开会	学习十九大，班会	√
	16.20	18.20		120分钟	编程，写报告	减肥，不吃饭，然后上选修	√
	20.30	22.00		90分钟	编程	准备考试

任务	听课	编程	准备考试	总计时间（分钟）
11.21	70	90	30	190
11.22	N	40	20	60
11.23	N	30	40	70
11.24	160	50	40	250
11.25	180	180	20	380
11.26	N	60	0	60
11.27	N	90	30	120
11.28	80	90	40	210

日期	编号	类型	引入阶段	修复阶段	缺陷描述	类型
11.28	1	20	编码	测试阶段	书写对象名时，写错了字母顺序	编写错误
	2	20	编码	测试阶段	无法跳转，	编写出错