www.pudn.com > SSPP.rar > ProjectInfo.java

package edu.neu.sspp.servlet; 
 
import java.io.IOException; 
import java.util.ArrayList; 
import java.util.Iterator; 
import java.util.Set; 
 
import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
 
import org.hibernate.Transaction; 
 
import edu.neu.sspp.PageSeparator; 
import edu.neu.sspp.hibernate.HibernateSessionFactory; 
import edu.neu.sspp.hibernate.TProject; 
import edu.neu.sspp.hibernate.TProjectDAO; 
import edu.neu.sspp.hibernate.TUser; 
 
public class ProjectInfo extends HttpServlet { 
 
	/** 
	 * Constructor of the object. 
	 */ 
	public ProjectInfo() { 
		super(); 
	} 
 
	/** 
	 * Destruction of the servlet. 
 
	 */ 
	public void destroy() { 
		super.destroy(); // Just puts "destroy" string in log 
		// Put your code here 
	} 
 
	/** 
	 * The doGet method of the servlet. 
 
	 * 
	 * This method is called when a form has its tag value method equals to get. 
	 *  
	 * @param request the request send by the client to the server 
	 * @param response the response send by the server to the client 
	 * @throws ServletException if an error occurred 
	 * @throws IOException if an error occurred 
	 */ 
	public void doGet(HttpServletRequest request, HttpServletResponse response) 
			throws ServletException, IOException { 
 
		String projectID = request.getParameter("proj"); 
		 
		TProjectDAO projectDAO = new TProjectDAO(); 
		TProject project = projectDAO.findById(projectID); 
		 
		if(project != null) { 
			TUser user = project.getTUser(); 
			if(request.getParameter("name").equals(user.getUserName())) { 
				project.setBrowse(project.getBrowse() + 1); 
				 
				Transaction transaction =  
					HibernateSessionFactory.getSession().beginTransaction(); 
				projectDAO.save(project); 
				transaction.commit(); 
				 
				request.setAttribute("project", project); 
				request.setAttribute("userID", user.getUserUid()); 
				request.setAttribute("userName", request.getParameter("name")); 
				//不能使用equal的project的count进行判断,而是要在请求里写一个count 
				request.setAttribute("count", project.getCount());		 
				 
				handlePage(project, request); 
				 
				request.getRequestDispatcher("../proj_jsp/proj_info.jsp").forward(request, response); 
				return; 
			} 
		} 
		 
		HibernateSessionFactory.closeSession(); 
		response.getWriter().write("page not found"); 
		 
	} 
	 
	//处理分页 
	private void handlePage(TProject project, HttpServletRequest request) { 
		Set set = project.getTComments(); 
		 
		PageSeparator page = new PageSeparator(set.size(), edu.neu.sspp.Constant.comment_page_size); 
 
		//如果页数小于或等于1，按不分页处理 
		if(page.getTotalPage() <= 1) { 
			request.setAttribute("comments", set); 
			 
			return; 
		} 
		 
		if(request.getParameter("page") == null) { 
			try { 
				page.setCurrentPage(1); 
			} catch (Exception e) { 
				// TODO Auto-generated catch block 
				e.printStackTrace(); 
			} 
		} 
		else { 
			try { 
				page.setCurrentPage(Integer.parseInt(request.getParameter("page"))); 
			} catch (NumberFormatException e) { 
				// TODO Auto-generated catch block 
				e.printStackTrace(); 
			} catch (Exception e) { 
				// TODO Auto-generated catch block 
				e.printStackTrace(); 
			} 
		} 
 
		//此处的处理并不得当 
		Iterator iterator = set.iterator(); 
		ArrayList comments = new ArrayList(); 
		for(int i = page.getCurrentPageBegin();i < page.getCurrentPageEnd(); i++ ) 
			comments.add(iterator.next()); 
			 
		request.setAttribute("page", page); 
		request.setAttribute("comments", comments); 
		 
	} 
 
	/** 
	 * The doPost method of the servlet. 
 
	 * 
	 * This method is called when a form has its tag value method equals to post. 
	 *  
	 * @param request the request send by the client to the server 
	 * @param response the response send by the server to the client 
	 * @throws ServletException if an error occurred 
	 * @throws IOException if an error occurred 
	 */ 
	public void doPost(HttpServletRequest request, HttpServletResponse response) 
			throws ServletException, IOException { 
 
		doGet(request, response); 
	} 
 
	/** 
	 * Initialization of the servlet. 
 
	 * 
	 * @throws ServletException if an error occure 
	 */ 
	public void init() throws ServletException { 
		// Put your code here 
	} 
 
}