软工概论00

网站系统开发需要掌握的技术：

1.基础内容
网页设计概述、网站设计制作的基本流程、色彩搭配在网站中的应用、网站用户界面的设计、网站广告的设计、网站中表格的使用、网站中层的应用、框架网站的制作、模板网站的制作、使用行为和Javascript制作特效、使用CSS样式表设计网页、建设数据库网站、
2、技术内容
HTML语法、CSS语法、JavaScript语法
3、图像处理
Flash动画创意、GIF动画制作、网页图片处理
4、行业网站实例
个人网站、企业宣传网站、新闻资讯网站、教育网站、电子政务网站、旅游网站、免费资源网站、门户网站、电子商务网站
5、后台编程
*数据库：SQLServer设计、MySQL设计、Access设计
*编程语言：ASP、JSP、VBScript、JavaScript、PHP、ASP.net
*编程实例：文章发布系统、留言板、BBS、会员注册系统、在线购物网站
6、网站管理
网站维护、网站规划、网站管理、商业网站全程制作、商业网站开发规范

源代码：

package com.jaovo.msg.dao;

import java.util.List;

import com.jaovo.msg.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 username);
public List<User> load();

}

package com.jaovo.msg.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.msg.Util.DBUtil;
import com.jaovo.msg.Util.UserException;
import com.jaovo.msg.model.User;

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

public class UserDaoImpl implements IUserDao {

@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 username = ?";
//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.getUsername());
//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("用户名已存在") ;
}
}

sql = "insert into t_user(username,password,nickname) value (?,?,?)";
preparedStatement = connection.prepareStatement(sql);
preparedStatement.setString(1, user.getUsername());
preparedStatement.setString(2, user.getPassword());
preparedStatement.setString(3, user.getNickname());
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 password = ? , nickname=? 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.getPassword());
preparedStatement.setString(2, user.getNickname());
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.setUsername(resultSet.getString("username"));
user.setPassword(resultSet.getString("password"));
user.setNickname(resultSet.getString("nickname"));
}
} 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 username) {
// 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.setUsername(resultSet.getString("username"));
user.setPassword(resultSet.getString("password"));
user.setNickname(resultSet.getString("nickname"));
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;
}

}

package com.jaovo.msg.model;

public class User {

private int id;
private String username;
private String nickname;
private String password;
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 getNickname() {
return nickname;
}
public void setNickname(String nickname) {
this.nickname = nickname;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}


}

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 鍔犺浇椹卞姩
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_msg";
Connection connection = null;
try {
//2 鍒涘缓閾炬帴瀵硅薄connection
connection = DriverManager.getConnection(url,user,password);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return connection;
}

//鍏抽棴璧勬簮鐨勬柟娉�
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();
}
}

}

package com.jaovo.msg.Util;

public class UserException extends RuntimeException{

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
}

}

jsp:

<%@page import="com.jaovo.msg.Util.UserException"%>
<%@page import="com.jaovo.msg.dao.UserDaoImpl"%>
<%@page import="com.jaovo.msg.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 username = request.getParameter("username");
String password = request.getParameter("password");
String nickname = request.getParameter("nickname");
if(username == null || "".equals(username.trim())){
request.setAttribute("error", "用户名不能为空");

%>
<jsp:forward page="addInput.jsp"></jsp:forward>
<%
}
User user = new User();
user.setUsername(username);
user.setPassword(password);
user.setNickname(nickname);

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>

<%@ 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>用户名称 : </td>
<td>
<input type="text" name="username" />
</td>
</tr>
<tr>
<td>用户密码:</td>
<td>
<input type="password" name="password" />
</td>
</tr>
<tr>
<td>用户昵称:</td>
<td>
<input type="text" name="nickname" />
</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>

结果截图：

我想在软件工程概论期间，能够熟练应用JAVA Web 每天抽出至少1个多小时的时间来练习