loginaction.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 LoginAction extends HttpServlet {
    
	public void init(ServletConfig config) throws ServletException {
    }
    
    /*
     *  处理<GET> 请求方法.
     */
    protected 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 uname = request.getParameter("username");
		String psw = request.getParameter("password");		
		String checkwd = request.getParameter("checkword");		
		OperateDatabase	newdb=new OperateDatabase();
		HttpSession session = request.getSession();
        String checkwd2 = (String)session.getAttribute("rand");	
		Blog blog=newdb.getBlog(uname);     
		if (blog==null){            //用户名错误
			response.sendRedirect("/NewBlog/error.jsp");
		}
		else{
			String dbPassword = blog.getPassword();
			if (!dbPassword.equals(psw)) {  //口令错误
				response.sendRedirect("/NewBlog/error.jsp");
			}
			else if (!checkwd.equals(checkwd2)) {  //验证码错误
				response.sendRedirect("/NewBlog/error.jsp");
			}
			else{
				session.setAttribute(Constants.LOGIN_USER_KEY,blog);
				int blogId=blog.getId();
				blog.setVisitcount(blog.getVisitcount() + 1);
				newdb.update(blog);
				session.setAttribute(Constants.VISIT_BLOG_KEY,blog);
				
				List sortList=newdb.getBlogSorts(blogId);
				session.setAttribute(Constants.SORT_LIST_KEY,sortList);
				
				List linkList=newdb.getBlogLinks(blogId);
				session.setAttribute(Constants.LINK_LIST_KEY,linkList);

				List newsList=newdb.allNews();
				session.setAttribute(Constants.NEWS_LIST_KEY,newsList);
				
				List articleList=newdb.getBlogArticles(blogId,0);
			    /*
			     * 分页显示
			     */
		    	List  dispList=new ArrayList();
		    	for (int i=0;i<articleList.size();i++){
					if (i<Constants.ARTICLE_PAGE_SIZE){
						dispList.add(articleList.get(i));
					}
		    	}
				session.setAttribute(Constants.ARTICLE_LIST_KEY,dispList);
				session.setAttribute(Constants.CUR_PAGEID_KEY,new Integer(0));
				session.setAttribute(Constants.CUR_SORTID_KEY,new Integer(0));
				response.sendRedirect("/NewBlog/users/MyBlog.jsp");
			}
		}
    }
}