基本信息

---

下载

   友情提示：（无需注册或充值，赞助后即可获取资源下载链接）

---

     嘿，亲！知识可是无价之宝呢，但咱这精心整理的资料也耗费了不少心血呀。小小地破费一下，绝对物超所值哦！如有下载和支付问题，请联系我们QQ(微信同号)：813200300

本次赞助数额为： 2 元　

支付宝支付

微信支付

   源码介绍

---

    用原始的servlet编写，三层架构，可供学习使用

package com.java1234.web;

import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.util.Iterator;
import java.util.List;

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 net.sf.json.JSONObject;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import com.java1234.dao.CommentDao;
import com.java1234.dao.NewsDao;
import com.java1234.dao.NewsTypeDao;
import com.java1234.model.Comment;
import com.java1234.model.News;
import com.java1234.model.NewsType;
import com.java1234.model.PageBean;
import com.java1234.util.DateUtil;
import com.java1234.util.DbUtil;
import com.java1234.util.NavUtil;
import com.java1234.util.PageUtil;
import com.java1234.util.PropertiesUtil;
import com.java1234.util.ResponseUtil;
import com.java1234.util.StringUtil;

public class NewsServlet extends HttpServlet{

/**
* 
*/
private static final long serialVersionUID = 1L;

DbUtil dbUtil=new DbUtil();
NewsDao newsDao=new NewsDao();
NewsTypeDao newsTypeDao=new NewsTypeDao();
CommentDao commentDao=new CommentDao();

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
String action=request.getParameter("action");
if("list".equals(action)){
this.newsList(request, response);
}else if("show".equals(action)){
this.newsShow(request, response);
}else if("preSave".equals(action)){
this.newsPreSave(request, response);
}else if("save".equals(action)){
this.newsSave(request, response);
}else if("backList".equals(action)){
this.newsBackList(request,response);
}else if("delete".equals(action)){
this.newsDelete(request,response);
}

}

private void newsList(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String typeId=request.getParameter("typeId");
String page=request.getParameter("page");
if(StringUtil.isEmpty(page)){
page="1";
}
Connection con=null;
News s_news=new News();
if(StringUtil.isNotEmpty(typeId)){
s_news.setTypeId(Integer.parseInt(typeId));
}
try{
con=dbUtil.getCon();
int total=newsDao.newsCount(con, s_news,null,null);
PageBean pageBean=new PageBean(Integer.parseInt(page),Integer.parseInt(PropertiesUtil.getValue("pageSize")));
List<News> newestNewsListWithType=newsDao.newsList(con, s_news, pageBean,null,null);
request.setAttribute("newestNewsListWithType", newestNewsListWithType);
request.setAttribute("navCode", NavUtil.genNewsListNavigation(newsTypeDao.getNewsTypeById(con, typeId).getTypeName(), typeId));
request.setAttribute("pageCode", PageUtil.getUpAndDownPagation(total, Integer.parseInt(page), Integer.parseInt(PropertiesUtil.getValue("pageSize")), typeId));
request.setAttribute("mainPage", "news/newsList.jsp");
request.getRequestDispatcher("foreground/newsTemp.jsp").forward(request, response);
}catch(Exception e){
e.printStackTrace();
}finally{
try {
dbUtil.closeCon(con);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

private void newsShow(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String newsId=request.getParameter("newsId");
Connection con=null;
try{
con=dbUtil.getCon();
newsDao.newsClick(con, newsId);
News news=newsDao.getNewsById(con, newsId);
Comment s_comment=new Comment();
s_comment.setNewsId(Integer.parseInt(newsId));
List<Comment> commentList=commentDao.commentList(con, s_comment,null,null,null);
request.setAttribute("commentList", commentList);
request.setAttribute("news", news);
request.setAttribute("pageCode", this.genUpAndDownPageCode(newsDao.getUpAndDownPageId(con, newsId)));
request.setAttribute("navCode", NavUtil.genNewsNavigation(news.getTypeName(), news.getTypeId() "",news.getTitle()));
request.setAttribute("mainPage", "news/newsShow.jsp");
request.getRequestDispatcher("foreground/newsTemp.jsp").forward(request, response);
}catch(Exception e){
e.printStackTrace();
}finally{
try {
dbUtil.closeCon(con);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

private String genUpAndDownPageCode(List<News> upAndDownPage){
News upNews=upAndDownPage.get(0);
News downNews=upAndDownPage.get(1);
StringBuffer pageCode=new StringBuffer();
if(upNews.getNewsId()==-1){
pageCode.append("<p>上一篇：没有了</p>");
}else{
pageCode.append("<p>上一篇：<a href='news?action=show&newsId=" upNews.getNewsId() "'>" upNews.getTitle() "</a></p>");
}
if(downNews.getNewsId()==-1){
pageCode.append("<p>下一篇：没有了</p>");
}else{
pageCode.append("<p>下一篇：<a href='news?action=show&newsId=" downNews.getNewsId() "'>" downNews.getTitle() "</a></p>");
}
return pageCode.toString();
}


private void newsPreSave(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String newsId=request.getParameter("newsId");
Connection con=null;
try{
con=dbUtil.getCon();
if(StringUtil.isNotEmpty(newsId)){
News news=newsDao.getNewsById(con, newsId);
request.setAttribute("news", news);
}
List<NewsType> newsTypeList=newsTypeDao.newsTypeList(con);
request.setAttribute("newsTypeList", newsTypeList);
if(StringUtil.isNotEmpty(newsId)){
request.setAttribute("navCode", NavUtil.genNewsManageNavigation("新闻管理", "新闻修改"));
}else{
request.setAttribute("navCode", NavUtil.genNewsManageNavigation("新闻管理", "新闻添加"));
}
request.setAttribute("mainPage", "/background/news/newsSave.jsp");
request.getRequestDispatcher("/background/mainTemp.jsp").forward(request, response);
}catch(Exception e){
e.printStackTrace();
}finally{
try {
dbUtil.closeCon(con);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

private void newsSave(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
FileItemFactory factory=new DiskFileItemFactory();
ServletFileUpload upload=new ServletFileUpload(factory);
List<FileItem> items=null;
try {
items=upload.parseRequest(request);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Iterator itr=items.iterator();
News news=new News();
while(itr.hasNext()){
FileItem item=(FileItem) itr.next();
if(item.isFormField()){
String fieldName=item.getFieldName();
if("newsId".equals(fieldName)){
if(StringUtil.isNotEmpty(item.getString("utf-8"))){
news.setNewsId(Integer.parseInt(item.getString("utf-8")));
}
}
if("title".equals(fieldName)){
news.setTitle(item.getString("utf-8"));
}
if("content".equals(fieldName)){
news.setContent(item.getString("utf-8"));
}
if("author".equals(fieldName)){
news.setAuthor(item.getString("utf-8"));
}
if("typeId".equals(fieldName)){
news.setTypeId(Integer.parseInt(item.getString("utf-8")));
}
if("isHead".equals(fieldName)){
news.setIsHead(Integer.parseInt(item.getString("utf-8")));
}
if("isImage".equals(fieldName)){
news.setIsImage(Integer.parseInt(item.getString("utf-8")));
}
if("isHot".equals(fieldName)){
news.setIsHot(Integer.parseInt(item.getString("utf-8")));
}
if("imageName".equals(fieldName)&&news.getImageName()==null){
if(StringUtil.isNotEmpty(item.getString("utf-8"))){
news.setImageName(item.getString("utf-8").split("/")[1]);
}
}
}else if(!"".equals(item.getName())){
try {
String imageName=DateUtil.getCurrentDateStr();
news.setImageName(imageName "." item.getName().split("\\.")[1]);
String filePath=PropertiesUtil.getValue("imagePath") imageName "." item.getName().split("\\.")[1];
item.write(new File(filePath));
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}


Connection con=null;
try{
con=dbUtil.getCon();
if(news.getNewsId()!=0){
newsDao.newsUpdate(con, news);
}else{
newsDao.newsAdd(con, news);
}
request.getRequestDispatcher("/news?action=backList").forward(request, response);
}catch(Exception e){
e.printStackTrace();
}finally{
try {
dbUtil.closeCon(con);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

private void newsBackList(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String s_bPublishDate=request.getParameter("s_bPublishDate");
String s_aPublishDate=request.getParameter("s_aPublishDate");
String s_title=request.getParameter("s_title");
String page=request.getParameter("page");
HttpSession session=request.getSession();
if(StringUtil.isEmpty(page)){
page="1";
session.setAttribute("s_bPublishDate", s_bPublishDate);
session.setAttribute("s_aPublishDate", s_aPublishDate);
session.setAttribute("s_title", s_title);
}else{
s_bPublishDate=(String) session.getAttribute("s_bPublishDate");
s_aPublishDate=(String) session.getAttribute("s_aPublishDate");
s_title=(String) session.getAttribute("s_title");
}
Connection con=null;
News s_news=new News();
if(StringUtil.isNotEmpty(s_title)){
s_news.setTitle(s_title);
}
try{
con=dbUtil.getCon();
int total=newsDao.newsCount(con, s_news, s_bPublishDate, s_aPublishDate);
String pageCode=PageUtil.getPagation(request.getContextPath() "/news?action=backList", total, Integer.parseInt(page), Integer.parseInt(PropertiesUtil.getValue("backPageSize")));
PageBean pageBean=new PageBean(Integer.parseInt(page),Integer.parseInt(PropertiesUtil.getValue("backPageSize")));
List<News> newsBackList=newsDao.newsList(con, s_news,pageBean,s_bPublishDate,s_aPublishDate);
request.setAttribute("pageCode", pageCode);
request.setAttribute("newsBackList", newsBackList);
request.setAttribute("navCode", NavUtil.genNewsManageNavigation("新闻管理", "新闻维护"));
request.setAttribute("mainPage", "/background/news/newsList.jsp");
request.getRequestDispatcher("/background/mainTemp.jsp").forward(request, response);
}catch(Exception e){
e.printStackTrace();
}finally{
try {
dbUtil.closeCon(con);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

private void newsDelete(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException{
String newsId=request.getParameter("newsId");
Connection con=null;
boolean delFlag;
try{
con=dbUtil.getCon();
int delNums=newsDao.newsDelete(con, newsId);
if(delNums==1){
delFlag=true;
}else{
delFlag=false;
}
ResponseUtil.write(delFlag, response);
}catch(Exception e){
e.printStackTrace();
}finally{
try {
dbUtil.closeCon(con);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}