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
