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Servlet+Jsp实现校园拾物招领系统

Servlet+Jsp实现校园拾物招领系统

1.技术介绍

java+servlet+mysql+JSP

开发工具：eclipse或IDEA

2.主要功能说明：

1)学生

注册、登录、个人信息修改、查看公告、查看失物信息、我的失物信息、我要挂失、查看拾物信息、我的拾物信息、发布拾物信息、我的认领、留言列表、我的留言、我要留言

2）管理员

用户管理、公告管理、拾物管理、失物管理、认领管理、留言管理

3.部分代码展示：

```java

package controller;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.PrintWriter;

import java.util.List;

import java.util.UUID;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.beanutils.BeanUtils;

import org.apache.commons.fileupload.FileItem;

import org.apache.commons.fileupload.disk.DiskFileItemFactory;

import org.apache.commons.fileupload.servlet.ServletFileUpload;

import dao.GoodsDao;

import dao.UserDao;

import model.Goods;

import model.PageBean;

import model.Shiwu;

import model.User;

import utils.PageUtils;

/**

* Servlet implementation class GoodsServlet

*/

public class GoodsServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

private GoodsDao goodsDao=new GoodsDao();

private UserDao userDao=new UserDao();

public GoodsServlet() {

super();

// TODO Auto-generated constructor stub

}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

doPost(request, response);

}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

String method=request.getParameter("method");

if(method!=null&&method.equals("addGoodsAct1")) {

Goods goods = fileUpload(request);

User user=(User) request.getSession().getAttribute("user");

goods.setU_id(user.getId());

boolean b=goodsDao.insertGoods(goods);//插入

if(b){

System.out.print(user.getId());

List<Goods> list=goodsDao.findMyInfo(goods.getU_id());

for(Goods g:list) {

User u =userDao.findById(g.getU_id());

g.setUser(u);

}

request.setAttribute("list", list);

request.getRequestDispatcher("/WEB-INF/users/goods_list.jsp").forward(request, response);

}

return;

}

if(method!=null&&method.equals("addGoodsAct2")) {

Goods goods = fileUpload(request);

boolean b=goodsDao.insertGoods(goods);//插入

if(b){

GoodsList2(request, response);

}

return;

}

if(method!=null&&method.equals("goodsListAct")) {

GoodsList(request,response);

return;

}

if(method!=null&&method.equals("goodsListAct1")) {

GoodsList1(request,response);

return;

}

//查询所有的失物信息

if(method!=null&&method.equals("goodsListAct2")) {

GoodsList2(request,response);

return;

}

if(method!=null&&method.equals("toAddGoodsAct1")) {

request.getRequestDispatcher("/WEB-INF/users/add_goods.jsp").forward(request, response);

return;

}

//跳转到添加页面

if(method!=null&&method.equals("toAddGoodsAct")) {

request.getRequestDispatcher("/WEB-INF/views/add_goods.jsp").forward(request, response);

return;

}

//跳转到更改界面

if(method!=null&&method.equals("queryGoodsAct")) {

int id=Integer.parseInt(request.getParameter("id"));

System.out.print(id+"****");

Goods record=goodsDao.findById(id);

request.setAttribute("list", record);

request.getRequestDispatcher("/WEB-INF/views/update_goods.jsp").forward(request, response);

return;

}

//删除物品

if(method!=null&&method.equals("deleteGoodsAct")) {

int id=Integer.parseInt(request.getParameter("id"));

String type=request.getParameter("type");

goodsDao.delete(id);

if(type.equals("1")) {

GoodsList1(request, response);

}else{

GoodsList2(request, response);

}

return;

}

if(method!=null&&method.equals("findByGnameAct")) {

String gname=request.getParameter("gname");

String lostPlace=request.getParameter("lostPlace");

System.out.print(lostPlace+"****");

List<Goods> list=goodsDao.findByGname(gname,lostPlace);

if(list.size()>0) {

request.setAttribute("list", list);

request.removeAttribute("msg");

request.getRequestDispatcher("/WEB-INF/views/list_goods.jsp").forward(request, response);

}else if(list.size()<=0) {

request.setAttribute("msg", "没有此物品信息");

request.getRequestDispatcher("/WEB-INF/views/list_goods.jsp").forward(request, response);

}

return;

}

if(method!=null&&method.equals("updateGoodsAct")) {

int id=Integer.parseInt(request.getParameter("id"));

String gname=request.getParameter("gname");

String lostPlace=request.getParameter("lostPlace");

String info=request.getParameter("info2");

System.out.print(info+"*****");

String createTime=request.getParameter("createTime");

String status=request.getParameter("status");

String phone=request.getParameter("phone");

Goods record=new Goods();

record.setGname(gname);

record.setLostPlace(lostPlace);

record.setInfo(info);

record.setPhone(phone);

record.setCreateTime(createTime);

record.setStatus(status);

record.setPhone(phone);

boolean b=goodsDao.updateGoods(record, id);//插入

if(b){

request.setAttribute("msg", "ok");

GoodsList2(request, response);

}else {

GoodsList2(request, response);

}

return;

}

}

private void GoodsList(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

String currentPage = request.getParameter("currentPage");

if (currentPage==null||currentPage.equals("")){

//如果第一次访问,没有传递currentPage参数,则当前页为1

currentPage="1";

}

//接收用户输入的每页显示数据的记录数

String pageSize = request.getParameter("pageSize");

//如果没有传递过来,设置一个默认值为2

//细节:当点击下一页或者别的,会导致pageSize丢失了,应该要带回去

if (pageSize==null||pageSize.equals("")){

//设置pageSize的默认值是2

pageSize="3";

}

//1)在service层调用获取PageBean对象的方法

PageUtils service = new PageUtils();

//只需要传入一个currentPage(当前页数)即可

PageBean pageBean = service.queryPageBean(currentPage,Integer.parseInt(pageSize));

//2)把PageBean对象放到域中

request.setAttribute("pageBean", pageBean);

request.getRequestDispatcher("/WEB-INF/users/list_goods.jsp").forward(request, response);

}

//用户查看

private void GoodsList1(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

User user =(User) request.getSession().getAttribute("user");

if(user!=null) {

List<Goods> list=goodsDao.findMyInfo(user.getId());

for(Goods g:list) {

User u =userDao.findById(g.getU_id());

g.setUser(u);

}

request.setAttribute("list", list);

request.getRequestDispatcher("/WEB-INF/users/goods_list.jsp").forward(request, response);

}else {

PrintWriter out = response.getWriter();

out.write("<script>");

out.write("alert('请先登录');");

out.write("location.href='GoodsServlet?method=loginOutAct'");

out.write("</script>");

out.close();

}

}

//管理员所有信息

private void GoodsList2(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

String currentPage = request.getParameter("currentPage");

if (currentPage==null||currentPage.equals("")){

//如果第一次访问,没有传递currentPage参数,则当前页为1

currentPage="1";

}

//接收用户输入的每页显示数据的记录数

String pageSize = request.getParameter("pageSize");

//如果没有传递过来,设置一个默认值为2

//细节:当点击下一页或者别的,会导致pageSize丢失了,应该要带回去

if (pageSize==null||pageSize.equals("")){

//设置pageSize的默认值是2

pageSize="3";

}

//1)在service层调用获取PageBean对象的方法

PageUtils service = new PageUtils();

//只需要传入一个currentPage(当前页数)即可

PageBean pageBean = service.queryPageBean(currentPage,Integer.parseInt(pageSize));

//2)把PageBean对象放到域中

request.setAttribute("pageBean", pageBean);

//3)转发

request.getRequestDispatcher("/WEB-INF/views/goods_list.jsp").forward(request, response);

}

public String makeFileName(String filename){

String ext = filename.substring(filename.lastIndexOf(".") + 1);

return UUID.randomUUID().toString() + "." + ext;

}

private Goods fileUpload(HttpServletRequest request) {

Goods goods=new Goods();

try {

DiskFileItemFactory factory = new DiskFileItemFactory();

ServletFileUpload upload = new ServletFileUpload(factory);

List<FileItem> list = upload.parseRequest(request);

for(FileItem item : list){

if(item.isFormField()){

String name = item.getFieldName();

String value = item.getString("UTF-8");

BeanUtils.setProperty(goods, name, value);

}else{

String filename = item.getName();

String savefilename = makeFileName(filename);

//String savepath="D:\\ws\\LostGoods\\WebContent\\upload\\";

String savepath= this.getServletContext().getRealPath("/upload");//Tomcat虚拟路径

InputStream in = item.getInputStream();

FileOutputStream out = new FileOutputStream(savepath + "\\" + savefilename);

int len = 0;

byte buffer[] = new byte[1024];

while((len = in.read(buffer)) > 0){

out.write(buffer, 0, len);

}

in.close();

out.close();

item.delete();

goods.setImgUrl(savefilename);

System.out.println(goods.getImgUrl());

}

}

return goods;

} catch (Exception e) {

e.printStackTrace();

throw new RuntimeException(e);

}

}

}

```

4.系统演示地址：

链接：https://pan.baidu.com/s/1r9wn0BGL7YXuGDYyq4v7fQ

提取码：f6e2

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