myblogaction.java

本博客系统是在J2EE平台上用Hibernate框架技术和MVC模式构建

package com.blog;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.blog.tableclass.*;

public class MyBlogAction extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public MyBlogAction() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * 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 {
//		设置接收信息的字符集
    	request.setCharacterEncoding("UTF-8");
    	//接收浏览器端提交的信息
		String blogId = request.getParameter("blogid");
		String sortId = request.getParameter("sortid");
		String pageId = request.getParameter("pageid");

		HttpSession session = request.getSession(true);
		int iBlogId = 0;
		OperateDatabase	db=new OperateDatabase();
		if (blogId!=null) {
			iBlogId = Integer.parseInt(blogId);
			Blog blog = db.getBlog(iBlogId);
			session.setAttribute(Constants.LOGIN_USER_KEY,blog);
		}
		else {
			Blog blog = (Blog)session.getAttribute(Constants.LOGIN_USER_KEY);
			iBlogId = blog.getId();
		}
		
		int iSortId = 0;
		if (sortId!=null) {
			iSortId = Integer.parseInt(sortId);
			session.setAttribute(Constants.CUR_SORTID_KEY,new Integer(iSortId));
		}
		else{
			Integer temp = (Integer)session.getAttribute(Constants.CUR_SORTID_KEY);
			iSortId = temp.intValue();
		}

		/*
		 * 页号处理
		 */
		int iPageId = 0;
		int pageCount = 0;
		List articleList=db.getBlogArticles(iBlogId,iSortId);
		if (pageId!=null) {
			iPageId = Integer.parseInt(pageId);
			if (iPageId<0) iPageId = 0;
		    /*
		     * 获取总页数
		     */
		    if (articleList.size()%Constants.ARTICLE_PAGE_SIZE ==0){
				pageCount=articleList.size() / Constants.ARTICLE_PAGE_SIZE;
			}
		    else{
		    	pageCount=articleList.size() / Constants.ARTICLE_PAGE_SIZE+1;
		    }
			if (iPageId>=pageCount) iPageId = pageCount-1;
			session.setAttribute(Constants.CUR_PAGEID_KEY,new Integer(iPageId));
		}
		else {
			Integer temp = (Integer)session.getAttribute(Constants.CUR_PAGEID_KEY);
			iPageId = temp.intValue();
		}
		
	    /*
	     * 分页显示
	     */
    	List  dispList=new ArrayList();
	    if ((articleList.size()>iPageId * Constants.ARTICLE_PAGE_SIZE )&&(iPageId>=0)){
	    	for (int i=iPageId*Constants.ARTICLE_PAGE_SIZE;i<(iPageId+1)*Constants.ARTICLE_PAGE_SIZE;i++){
				if (i<articleList.size()){
					dispList.add(articleList.get(i));
				}
	    	}
	    }
		session.setAttribute(Constants.ARTICLE_LIST_KEY,dispList);
	    response.sendRedirect("/NewBlog/users/MyBlog.jsp");
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * 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 {

	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}