edittopicsave.java

又一个课程设计 简易 JSP 论坛 功能较简单的那种, 界面上模仿了 Discuz JSP 本来就学的不行, 只是尽量实现了 MVC

package cn.ialvin.bbs.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.sql.Timestamp;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.ialvin.bbs.bean.Topic;
import cn.ialvin.bbs.bean.User;
import cn.ialvin.bbs.dao.DAOFactory;
import cn.ialvin.bbs.dao.IManagerDAO;
import cn.ialvin.bbs.dao.ITopicDAO;
import cn.ialvin.web.Servlet;

public class EditTopicSave extends Servlet {
	private static final long serialVersionUID = 1L;
	public EditTopicSave() { super(); }
	public void destroy() { super.destroy(); }

	public void doAction(
			HttpServletRequest request,
			HttpServletResponse response,
			PrintWriter out,
			DAOFactory factory)
			throws ServletException, IOException, SQLException {
		int id;
		try {
			id = this.getIParameter("id", request);
		} catch (Exception e) {
			this.alert("非法进入!", out);
			return;
		}
		String title = this.getParameter("title", request);
		String content = this.getParameter("contentx", request);
		if ("".equals(title)) {
			this.alert("非法进入！", out);
			System.out.println(2);
			return;
		}
		if (content.trim().length() < 8) {
			this.alert("非法进入！", out);
			System.out.println(content);
			return;
		}
		Object o = request.getSession().getAttribute("usr");
		if (o == null) {
			this.alert("非法进入!", out);
			return;
		}
		User usr = (User)o;
		IManagerDAO md = factory.getManagerDAO();
		ITopicDAO td = factory.getTopicDAO();
		Topic topic = td.getTopic(id);
		boolean isMGR = md.isManager(usr.getUsn(), topic.getForum());
		if (isMGR || topic.getAuthor().equals(usr.getUsn()) || usr.isAdmin()) {
			topic.setTitle(title);
			topic.setContent(content);
			topic.setUpdate(new Timestamp(System.currentTimeMillis()));
			td.updateTopic(topic);
			this.alert("修改成功!", out);
			this.replace("../ShowTopic?id=" + topic.getId(), out);
		} else {
			this.alert("非法进入!", out);
		}
	}
}