课堂练习设计思想，源程序代码，运行结果，并按照PSP0级的要求记录开发过程中的项目计划日志，时间记录日志，缺陷记录日志。

 设计思想：连接数据库，实现sql语句，对成员变量进行封装，实现增的方法，最后描绘登陆界面用JSP来书写

源代码：

//信1605-3 20163578   于丁一
package com.jaovo.sk.dao;

import java.util.List;

import com.jaovo.sk.model.User;

public interface IUserDao {
	public void add(User user);
	public void delete(int id);
	public void update(User user);
	public User load(int id);
	public User load(String kecheng);
	public List<User> load();
	
}

　　

//信1605-3 20163578   于丁一
package com.jaovo.sk.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.jaovo.sk.Util.DBUtil;
import com.jaovo.sk.Util.UserException;
import com.jaovo.sk.model.User;

import sun.net.www.content.text.plain;



public class UserDaoImpl implements IUserDao {

	@SuppressWarnings("resource")
	@Override
	public void add(User user) {
		//鑾峰緱閾炬帴瀵硅薄
		Connection connection = DBUtil.getConnection();
		//鍑嗗�sql璇�彞
		String sql = "select count(*) from t_user where kecheng = ?";
		//鍒涘缓璇�彞浼犺緭瀵硅薄
		PreparedStatement preparedStatement = null;
		ResultSet resultSet = null;
		try {
			preparedStatement = connection.prepareStatement(sql);
			preparedStatement.setString(1, user.getkecheng());
			//鎺ユ敹缁撴灉闆?
			resultSet = preparedStatement.executeQuery();
			//閬嶅巻缁撴灉闆?
			while(resultSet.next()) {
				if (resultSet.getInt(1) > 0) {
					throw new UserException("鐢ㄦ埛宸插瓨鍦?") ;
				}
			}
			
			sql = "insert into t_user(kecheng,jiaoshi,didian) value (?,?,?)";
			preparedStatement = connection.prepareStatement(sql);
			preparedStatement.setString(1, user.getkecheng());
			preparedStatement.setString(2, user.getjiaoshi());
			preparedStatement.setString(3, user.getdidian());
			preparedStatement.executeUpdate();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			//鍏抽棴璧勬簮
			DBUtil.close(resultSet);
			DBUtil.close(preparedStatement);
			DBUtil.close(connection);
		}
		
	}

	@Override
	public void delete(int id) {
		Connection connection = DBUtil.getConnection();
		String sql = "delete from t_user where id = ?";
		PreparedStatement preparedStatement = null;
		
		try {
			preparedStatement = connection.prepareStatement(sql);
			preparedStatement.setInt(1, id);
			preparedStatement.executeUpdate();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			DBUtil.close(preparedStatement);
			DBUtil.close(connection);
		}
		
	}

	@Override
	public void update(User user) {
		Connection connection = DBUtil.getConnection();
		//鍑嗗�sql璇�彞
		String sql = "update t_user set jiaoshi = ? , didian=? where id = ?";
		//鍒涘缓璇�彞浼犺緭瀵硅薄
		PreparedStatement preparedStatement = null;
		try {
			preparedStatement = connection.prepareStatement(sql);
			preparedStatement.setString(1, user.getjiaoshi());
			preparedStatement.setString(2, user.getdidian());
			preparedStatement.setInt(3, user.getId());
			preparedStatement.executeUpdate();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			DBUtil.close(preparedStatement);
			DBUtil.close(connection);
		}
	}

	@Override
	public User load(int id) {
		Connection connection = DBUtil.getConnection();
		//鍑嗗�sql璇�彞
		String sql = "select * from t_user  where id = ?";
		//鍒涘缓璇�彞浼犺緭瀵硅薄
		PreparedStatement preparedStatement = null;
		ResultSet resultSet = null;
		User user = null;
		try {
			preparedStatement = connection.prepareStatement(sql);
			preparedStatement.setInt(1, id);
			resultSet = preparedStatement.executeQuery();
			while(resultSet.next()) {
				user = new User();
				user.setId(id);
				user.setkecheng(resultSet.getString("kecheng"));
				user.setjiaoshi(resultSet.getString("jiaoshi"));
				user.setdidian(resultSet.getString("didian"));
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			DBUtil.close(resultSet);
			DBUtil.close(preparedStatement);
			DBUtil.close(connection);
		}
		return  user;
	}

	@Override
	public User load(String kecheng) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public List<User> load() {
		Connection connection = DBUtil.getConnection();
		//鍑嗗�sql璇�彞
		String sql = "select * from t_user ";
		//鍒涘缓璇�彞浼犺緭瀵硅薄
		PreparedStatement preparedStatement = null;
		ResultSet resultSet = null;
		//闆嗗悎涓�彧鑳芥斁鍏�ser瀵硅薄
		List<User> users = new ArrayList<User>();
		User user = null;
		try {
			preparedStatement = connection.prepareStatement(sql);
			resultSet = preparedStatement.executeQuery();
			while(resultSet.next()) {
				user = new User();
				user.setId(resultSet.getInt("id"));
				user.setkecheng(resultSet.getString("kecheng"));
				user.setjiaoshi(resultSet.getString("jiaoshi"));
				user.setdidian(resultSet.getString("didian"));
				users.add(user);
				}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			DBUtil.close(resultSet);
			DBUtil.close(preparedStatement);
			DBUtil.close(connection);
		}
		return  users;
	}

}

　　

//信1605-3 20163578   于丁一
package com.jaovo.sk.model;

public class User {
	
	private int id;
	private String  kecheng;
	private String  jiaoshi;
	private String  didian;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getkecheng() {
		return kecheng;
	}
	public void setkecheng(String kecheng) {
		this.kecheng = kecheng;
	}
	public String getjiaoshi() {
		return jiaoshi;
	}
	public void setjiaoshi(String jiaoshi) {
		this.jiaoshi = jiaoshi;
	}
	public String getdidian() {
		return didian;
	}
	public void setdidian(String didian) {
		this.didian = didian;
	}
	
}

　　

//信1605-3 20163578   于丁一
package com.jaovo.sk.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 閸旂姾娴囨す鍗炲З
			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/jaovo_sk";
		Connection connection = null;
		try {
			//2 閸掓稑缂撻柧鐐�复鐎电�钖刢onnection
			 connection = DriverManager.getConnection(url,user,password);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return connection;
	}
	
	//閸忔娊妫寸挧鍕�爱閻ㄥ嫭鏌熷▔锟?
	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();
		}
	}
	
}

　　

//信1605-3 20163578   于丁一
package com.jaovo.sk.Util;

public class UserException extends RuntimeException{

	/**
	 * 
	 */
	private static final long serialVersionUID = 7067516052133635189L;

	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.sk.Util.UserException"%>
<%@page import="com.jaovo.sk.dao.UserDaoImpl"%>
<%@page import="com.jaovo.sk.model.User"%>
<%@ 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 kecheng = request.getParameter("kecheng");
String jiaoshi = request.getParameter("jiaoshi");
String didian = request.getParameter("didian");
if(kecheng == null || "".equals(kecheng.trim())){
request.setAttribute("error", "课程名称不能为空");
%>
<jsp:forward page="addInput.jsp"></jsp:forward>
<%
}
if(jiaoshi.equals("王建民")||jiaoshi.equals("刘立嘉")||jiaoshi.equals("刘丹")||jiaoshi.equals("王辉")||jiaoshi.equals("杨子光"))
{

}
else{
request.setAttribute("error", "教师不为指定教师");

%>
<jsp:forward page="addInput.jsp"></jsp:forward>
<%
}
if(didian.startsWith("一教")||didian.startsWith("二教")||didian.startsWith("三教")||didian.startsWith("基教"))
{

}
else{
request.setAttribute("error", "地点不为指定地点");
%>
<jsp:forward page="addInput.jsp"></jsp:forward>
<%
}

User user = new User();
user.setkecheng(kecheng);
user.setjiaoshi(jiaoshi);
user.setdidian(didian);

UserDaoImpl userDao = new UserDaoImpl();
try{
userDao.add(user);
%>

用户保存成功!!<br>
<a href="addInput.jsp">继续添加</a><br>
<a href="#">用户列表</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>用户添加页面</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="kecheng" />
</td>
</tr>
<tr>
<td>教师名称:</td>
<td>
<input type="text" name="jiaoshi" />
</td>
</tr>
<tr>
<td>教课地点:</td>
<td>
<input type="text" name="didian" />
</td>
</tr>
<tr align="center">
<td colspan="2">
<input type="submit" value="提交" />
<input type="reset" value="重置" />
</td>
</tr>
</table>
</form>
</body>
</html>

init.jsp:

-- mysal -u root -p root;
-- show databases;
-- drop database jaovo_shop;

create database jaovo_sk;
use jaovo_sk;
GRANT ALL ON jaovo_sk.* to "jaovo"@"localhost" IDENTIFIED BY "root";
create table t_user(
id int(10) primary key auto_increment,
kecheng varchar(255),
jiaoshi varchar(255),
didian varchar(255),
type int(2),
status int(2)
);

create table t_message(
id int(10) primary key auto_increment,
title varchar(254),
content text,
post_date datetime,
user_id int(10),
CONSTRAINT FOREIGN KEY(user_id) REFERENCES t_user(id)
);

create table t_comment(
id int(10) primary key auto_increment,
content text,
post_date datetime,
user_id int(10),
msg_id int(10),
CONSTRAINT FOREIGN KEY(user_id) REFERENCES t_user(id),
CONSTRAINT FOREIGN KEY(msg_id) REFERENCES t_message(id)
);

结果截图：

项目计划总结：

时间记录日志：

缺陷记录日志：

在细节方面漏掉了；

在实现规定老师，规定地点的功能上花费了一些时间。

程序书写还是比较慢，应该经常练习，提升自己的指法