项目名称：相宠博客系统
1、引言：
随着计算机科学技术的迅速发展，越来越多的计算机应用成为人们生活或者工作中的一般部分，诸如QQ、微信这样非常火热社交软件也层出不穷，同时，也有很多软件应用逐渐从我们的生活中消失。但是，博客系统已经有很长一段时间在社交平台中都占有一席之地了，并且它将会持续的发展下去。
2、项目介绍：
我的“相宠博客”系统是基于Tomcat、servlet的一个web博客系统，用户可以浏览博客中的历史文章，登录成功后可进行文章的增、删、改、查等操作。该项目采用了mvc设计模式，分为controller层、view层、dao层。dao层主要整合了jdbc,将数据库中的记录抽象化为Java中的实例对象，将表数据模型化对象。controller主要有servlet实现，可以接收用户的请求、控制页面的跳转，数据的传递，controller的数据传递：从dao层获取数据并将数据以request、session的方式传递给jsp页面，并通过请求转发、重定向跳转到目标jsp页面。view层主要由jsp实现，jsp主要负责页面的展示，业务处理都交给servlet去做，将各层功能区别开来，降低各层的耦合性，方便多人开发协作。
3、总体设计展示：
4、核心代码
主界面：
-
${article.summary}
作者：${article.user.nickname}
字符数：${article.letterTotal}
阅读量：${article.readTotal}
评论量：${article.commentTotal}
发表时间：
数据库增删改查部分代码：
public ArrayList
//将文章记录转成文章对象存放在list中
ArrayList
//sql语句必须将所有article/user所有的劣质查询出来
String sql = "SELECT article.*,user.id as uid,username,password,nickname,avatar,user.status as ustatus,user.addtime as uaddtime from article,user where article.userid = user.id and article.status=0 order by article.addtime desc";
Connection connection = DBTools.getConnection();
PreparedStatement ps = null;
ResultSet rs = null;
try {
ps = connection.prepareStatement(sql);
rs = ps.executeQuery();
while (rs.next()) {
//将记录列值转为article对象属性值
Article article = new Article();
article.setId(rs.getInt("id"));
article.setTitle(rs.getString("title"));
article.setSummary(rs.getString("summary"));
article.setContent(rs.getString("content"));
article.setReadTotal(rs.getInt("read_total"));
article.setCommentTotal(rs.getInt("comment_total"));
article.setLetterTotal(rs.getInt("letter_total"));
article.setStatus(rs.getInt("status"));
Timestamp time = rs.getTimestamp("addtime");
Date addtime = new Date(time.getTime());
article.setAddtime(addtime);
//将结果中的user记录转为user对象
User user = new User();
user.setId(rs.getInt("uid"));
user.setUsername(rs.getString("username"));
user.setPassword(rs.getString("password"));
user.setNickname(rs.getString("nickname"));
user.setAvatar(rs.getString("avatar"));
user.setStatus(rs.getInt("ustatus"));
Timestamp utime = rs.getTimestamp("uaddtime");
Date uaddtime = new Date(utime.getTime());
user.setAddtime(uaddtime);
article.setUser(user);
//将文章对象添加到文章列表中
articles.add(article);
}
} catch (SQLException throwables) {
throwables.printStackTrace();
} finally {
DBTools.close(connection, ps, rs);
}
return articles;
}
public Article selectArticleById(String aid) {
Article article = new Article();
String sql = "SELECT article.*,user.id as uid,username,password,nickname,avatar,user.status as ustatus,user.addtime as uaddtime from article,user where article.userid = user.id and article.id = ?";
Integer id = Integer.parseInt(aid);
Connection connection = DBTools.getConnection();
PreparedStatement ps = null;
ResultSet rs = null;
try {
ps = connection.prepareStatement(sql);
ps.setInt(1, id);
rs = ps.executeQuery();
while (rs.next()) {
//将记录列值转为article对象属性值
//将记录值转为article对象属性值
article.setId(rs.getInt("id"));
article.setTitle(rs.getString("title"));
article.setSummary(rs.getString("summary"));
article.setContent(rs.getString("content"));
article.setReadTotal(rs.getInt("read_total"));
article.setCommentTotal(rs.getInt("comment_total"));
article.setLetterTotal(rs.getInt("letter_total"));
article.setStatus(rs.getInt("status"));
Timestamp time = rs.getTimestamp("addtime");
Date addtime = new Date(time.getTime());
article.setAddtime(addtime);
//将结果中user记录转为user对象
User user = new User();
user.setId(rs.getInt("uid"));
user.setUsername(rs.getString("username"));
user.setPassword(rs.getString("password"));
user.setNickname(rs.getString("nickname"));
user.setAvatar(rs.getString("avatar"));
user.setStatus(rs.getInt("ustatus"));
Date uaddtime =new Date(time.getTime());
user.setAddtime(uaddtime);
article.setUser(user);
}
} catch (SQLException throwables) {
throwables.printStackTrace();
}
String sql1 = "update article set read_total=read_total+1 where id = ?";
Connection connection1 = DBTools.getConnection();
PreparedStatement ps1 = null;
try {
ps1 = connection1.prepareStatement(sql1);
ps1.setInt(1,id);
ps1.executeUpdate();
} catch (SQLException throwables) {
throwables.printStackTrace();
}
finally {
DBTools.close(connection,ps,null);
DBTools.close(connection1,ps1,null);
}
return article;
}
public void deleteArticleById(String aid) {
String sql = "update article set status=1 where id = ?";
Connection connection = DBTools.getConnection();
PreparedStatement ps = null;
try {
ps = connection.prepareStatement(sql);
Integer id = Integer.parseInt(aid);
ps.setInt(1,id);
ps.executeUpdate();
} catch (SQLException throwables) {
throwables.printStackTrace();
} finally {
DBTools.close(connection,ps,null);
}
}
public void updateArticleleById(String title, String summary, String content, String id) {
String sql = "update article set title=?,summary=?,content=? where id=?";
Connection connection = DBTools.getConnection();
PreparedStatement ps = null;
try {
ps = connection.prepareStatement(sql);
ps.setString(1,title);
ps.setString(2,summary);
ps.setString(3,content);
Integer aid = Integer.parseInt(id);
ps.setInt(4,aid);
ps.executeUpdate();
} catch (SQLException throwables) {
throwables.printStackTrace();
} finally {
DBTools.close(connection,ps,null);
}
}
创建对象：
//user类
public class User {
private Integer id;
private String username;
private String password;
private String nickname;
private String avatar;
private Integer status;
private Date addtime;
//comment类
public class Comment {
private Integer id;
private String content;
private User user;
private Article article;
private Integer status;
private Date addtime;
//article类
public class Article {
private Integer id;
private String title;
private String summary;
private String content;
private Integer readTotal;
private Integer commentTotal;
private Integer letterTotal;
private User user;
private Integer status;
private Date addtime;
主程序：
@WebServlet("/main")
public class MainServlet extends HttpServlet {
ArticleDao articleDao = new ArticleDao();
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//调用articleDao获取文章
ArrayList
//文中列表放入请求作用域中
request.setAttribute("articles",articles);
//请求转发到main.jsp
request.getRequestDispatcher("/main.jsp").forward(request,response);
}
}
记录完毕，继续努力！