addtext.java

一个JAVA做的博客系统。系统采用JSP + JS + TOMCAT + MYSQL制作。用户能上传图片和音乐到系统中。游客和用户自己能在页面中浏览文件和听歌。

package essay;

import java.io.IOException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

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

import common.User;

public class AddText extends HttpServlet
{
	public void doPost(HttpServletRequest request, HttpServletResponse response)
		throws ServletException, IOException
	{
		request.setCharacterEncoding("gb2312");
		String flag, at, path;
		at = request.getParameter("at");
		flag = request.getParameter("fToAT");
		path = "/essay/show.jsp";
		HashMap props = (HashMap)request.getSession().getAttribute("props");
		try
		{
			if(flag.equals("title"))
			{
				User user = (User)props.get("user");
				Title t = new Title(user.getUsername(), at);
				boolean insertFlag = TitleOp.insert(t);
			    if(props.containsKey("essays"))
			    	props.remove("essays");
			    if(props.containsKey("cmts"))
			    	props.remove("cmts");
				if(!insertFlag)
				{
					path = "/common/error.jsp";
					props.put("err", "You had publish this essay.");
				}
				else
				{
					int id = TitleOp.selId(t);
					at = at.replaceAll(" ", " ");
					props.put("title", at);
					props.put("titleId", id);
					props.put("cmt", "no");
				}
			}
			else if(flag.equals("text"))
			{
				Text e = new Text();
				int titleId = (Integer)props.get("titleId");
				props.remove("titleId");
				e.setTitleId(titleId);
				e.setContent(at);
				e.setFlag("t");
				EssayOp.tInsert(e);
				String username = ((User)props.get("user")).getUsername();
				props.put("essays", EssayOp.selectAll(titleId, username));
			}
		}
		catch(Exception e)
		{
			path = "/common/error.jsp";
			props.put("err", e.getMessage());
		}
		finally
		{
			request.getSession().setAttribute("props", props);
			RequestDispatcher rd = request.getRequestDispatcher(path);
			rd.forward(request, response);
		}
	}
}