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Java EE论坛系统是一种基于Java EE技术开发的网页应用程序,用于用户之间的交流和讨论。该系统主要包括用户注册、登录、发帖、回帖、查看帖子等功能。下面是一个简单的Java EE论坛系统的代码示例:
1. 用户注册功能:
// 处理用户注册请求的Servlet
@WebServlet("/register")
public class RegisterServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String username = request.getParameter("username");
String password = request.getParameter("password");
// 将用户信息保存到数据库中
User user = new User(username, password);
UserDao userDao = new UserDao();
userDao.addUser(user);
// 注册成功后重定向到登录页面
response.sendRedirect("login.html");
}
}
2. 用户登录功能:
// 处理用户登录请求的Servlet
@WebServlet("/login")
public class LoginServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String username = request.getParameter("username");
String password = request.getParameter("password");
// 验证用户输入的用户名和密码是否正确
UserDao userDao = new UserDao();
User user = userDao.getUser(username);
if (user != null && user.getPassword().equals(password)) {
// 登录成功后将用户信息保存到Session中
HttpSession session = request.getSession();
session.setAttribute("user", user);
// 登录成功后重定向到首页
response.sendRedirect("index.html");
} else {
// 登录失败后重定向到登录页面
response.sendRedirect("login.html");
}
}
}
3. 发帖功能:
// 处理发帖请求的Servlet
@WebServlet("/post")
public class PostServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String title = request.getParameter("title");
String content = request.getParameter("content");
// 获取当前登录用户信息
HttpSession session = request.getSession();
User user = (User) session.getAttribute("user");
// 将帖子信息保存到数据库中
Post post = new Post(title, content, user);
PostDao postDao = new PostDao();
postDao.addPost(post);
// 发帖成功后重定向到帖子详情页面
response.sendRedirect("postDetail?id=" + post.getId());
}
}
4. 回帖功能:
// 处理回帖请求的Servlet
@WebServlet("/reply")
public class ReplyServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String content = request.getParameter("content");
int postId = Integer.parseInt(request.getParameter("postId"));
// 获取当前登录用户信息
HttpSession session = request.getSession();
User user = (User) session.getAttribute("user");
// 将回帖信息保存到数据库中
Reply reply = new Reply(content, user, postId);
ReplyDao replyDao = new ReplyDao();
replyDao.addReply(reply);
// 回帖成功后重定向到帖子详情页面
response.sendRedirect("postDetail?id=" + postId);
}
}
以上是一个简单的Java EE论坛系统的代码示例,通过这些代码可以实现用户注册、登录、发帖、回帖等功能。