文章目录
- Java课程设计项目-servlet+jsp美食系统
- 一、项目介绍
- 二、技术介绍
- 2.1 环境需要
- 2.2 技术栈
- 环境需要
- 三、功能实现
- 3.1登录注册
- 3.2首页菜品展示、轮播图
- 3.3美食菜品分类、查询
- 3.4作品动态、个人简介、菜品收藏
- 3.5创建菜谱、添加步骤
- 四、系统代码展示
- 4.1项目架构(MVC)
- 4.2部分代码展示
- 获取源码
Java课程设计项目-servlet+jsp美食系统
一、项目介绍
项目功能包含:
- 用户登录、注册
- 首页菜品展示、轮播图
- 美食菜品分类、查询
- 作品动态、个人简介、菜品收藏
- 创建菜谱、添加步骤
二、技术介绍
2.1 环境需要
- 运行环境:最好是java jdk 1.8,我们在这个平台上运行的。其他版本理论上也可以。
- IDE环境:IDEA,Eclipse,Myeclipse都可以。推荐IDEA;
- tomcat环境:Tomcat 7.x,8.x,9.x版本均可
- 硬件环境:windows 7/8/10 1G内存以上;或者 Mac OS;
- 数据库:MySql 5.7版本;
- 是否Maven项目:否;
2.2 技术栈
环境需要
- Serverlet+JSP+CSS+JavaScript+mysql
三、功能实现
3.1登录注册
3.2首页菜品展示、轮播图
3.3美食菜品分类、查询
3.4作品动态、个人简介、菜品收藏
3.5创建菜谱、添加步骤
四、系统代码展示
4.1项目架构(MVC)
4.2部分代码展示
RecipeServiceImpl
package yjf.psyd.service.impl;
import java.io.File;
import java.util.List;
import yjf.psyd.bean.Recipe;
import yjf.psyd.bean.RecipeStep;
import yjf.psyd.bean.User;
import yjf.psyd.dao.RecipeDao;
import yjf.psyd.dao.impl.RecipeDaoImpl;
import yjf.psyd.service.RecipeService;
public class RecipeServiceImpl implements RecipeService {
// 声明Dao层对象,多态
RecipeDao rd = new RecipeDaoImpl();
// 创建菜谱
@Override
public int createRecipeService(String createDate, String title, String info, String material,
List<String> stepInfos, List<String> categorys, String coverFilePath, List<String> stepFilesPath, User user) {
return rd.createRecipeDao(createDate, title, info, material, stepInfos, categorys, coverFilePath, stepFilesPath,
user);
}
// 菜谱详情
@Override
public Recipe recipeDetailService(String recipeId,User user) {
return rd.recipeDetailDao(recipeId,user);
}
// 菜谱步骤详情
@Override
public RecipeStep recipeStepDetailService(String recipeId) {
return rd.recipeStepDetailDao(recipeId);
}
// 删除菜谱
@Override
public int DeleteRecipeService(String recipeId) {
return rd.DeleteRecipeDao(recipeId);
}
// 插入收藏菜谱
@Override
public int insertCollectionRecipe(String recipeId,User user) {
return rd.insertCollectionRecipeDao(recipeId,user);
}
// 删除收藏菜谱
@Override
public int deleteCollectionRecipe(String recipeId, User user) {
return rd.deleteCollectionRecipeDao(recipeId,user);
}
}
PageDaoImpl
package yjf.psyd.dao.impl;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import yjf.psyd.bean.CategoryPage;
import yjf.psyd.bean.CategoryPageDetail;
import yjf.psyd.bean.HomePage;
import yjf.psyd.bean.HomePageDetail;
import yjf.psyd.bean.Page;
import yjf.psyd.bean.PageDetail;
import yjf.psyd.bean.SearchPage;
import yjf.psyd.bean.SearchPageDetail;
import yjf.psyd.bean.User;
import yjf.psyd.dao.PageDao;
import yjf.psyd.util.DbConnection;
public class PageDaoImpl implements PageDao {
// 请求首页PopRecipe数据
@Override
public Page indexPopRecipeDao(int index) {
// 声明jdbc变量
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
// 声明对象、变量
Page p = new Page();
int count = -1;
List<PageDetail> pageDetail = new ArrayList<>();
try {
// 获取链接
conn = DbConnection.getConnection();
// 创建sql命令
String sql = "select count(1) from recipe";
String sql1 = "SELECT * FROM recipe,user_createrecipe WHERE recipe.id=user_createrecipe.createRecipe ORDER BY recipe.id DESC limit ?,10;";
// 创建sql命令对象
ps = conn.prepareStatement(sql);
// 执行sql语句
rs = ps.executeQuery();
if (rs != null) {
while (rs.next()) {
p.setTotleCount(rs.getInt(1));
}
}
ps = conn.prepareStatement(sql1);
// 给占位符赋值
ps.setInt(1, index);
rs = ps.executeQuery();
if (rs != null) {
while (rs.next()) {
PageDetail pd = new PageDetail(rs.getInt("id"), rs.getString("title"), rs.getString("coverPath"),
rs.getInt("userId"), rs.getString("username"));
pageDetail.add(pd);
p.setPageDetail(pageDetail);
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
// 关闭链接
DbConnection.closeDB(conn, ps, rs);
}
// 返回结果
return p;
}
// 请求homepage分页数据
@Override
public HomePage homePageDao(String userId, int createCp, int collectionCp) {
// 声明jdbc变量
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
// 声明对象、变量
HomePage hp = new HomePage();
List<HomePageDetail> createDetail = new ArrayList<>();
List<HomePageDetail> collectionDetail = new ArrayList<>();
try {
// 获取链接
conn = DbConnection.getConnection();
// 创建sql命令
String sql = "SELECT count(1) FROM user,user_createrecipe,recipe where user.id=user_createrecipe.userId and recipe.id = user_createrecipe.createRecipe and user.id = ?;";
String sql1 = "SELECT * FROM user,user_createrecipe,recipe where user.id=user_createrecipe.userId and recipe.id = user_createrecipe.createRecipe and user.id = ? ORDER BY recipe.id DESC limit ?,6;";
String sql2 = "SELECT count(1) FROM user,user_collection,recipe where user.id=user_collection.userId and recipe.id = user_collection.collection and user.id = ?;";
String sql3 = "SELECT * FROM user,user_collection,recipe where user.id=user_collection.userId and recipe.id = user_collection.collection and user.id = ? ORDER BY recipe.id DESC limit ?,6;";
String sql4 = "SELECT * FROM user WHERE id = ?;";
// 创建sql命令对象
ps = conn.prepareStatement(sql);
// 给占位符赋值
ps.setString(1, userId);
// 执行sql语句
rs = ps.executeQuery();
if (rs != null) {
while (rs.next()) {
hp.setCreateTotleCount(rs.getInt(1));
}
}
ps = conn.prepareStatement(sql1);
// 给占位符赋值
ps.setString(1, userId);
ps.setInt(2, (createCp - 1) * 6);
// 执行sql语句
rs = ps.executeQuery();
if (rs != null) {
while (rs.next()) {
HomePageDetail hpd = new HomePageDetail(rs.getInt("recipe.id"), rs.getString("title"),
rs.getString("coverPath"));
createDetail.add(hpd);
hp.setCreateDetail(createDetail);
}
}
ps = conn.prepareStatement(sql2);
// 给占位符赋值
ps.setString(1, userId);
// 执行sql语句
rs = ps.executeQuery();
if (rs != null) {
while (rs.next()) {
hp.setCollectionTotleCount(rs.getInt(1));
}
}
ps = conn.prepareStatement(sql3);
// 给占位符赋值
ps.setString(1, userId);
ps.setInt(2, (collectionCp - 1) * 6);
// 执行sql语句
rs = ps.executeQuery();
if (rs != null) {
while (rs.next()) {
HomePageDetail hpd1 = new HomePageDetail(rs.getInt("recipe.id"), rs.getString("title"),
rs.getString("coverPath"));
collectionDetail.add(hpd1);
hp.setCollectionDetail(collectionDetail);
}
}
ps = conn.prepareStatement(sql4);
// 给占位符赋值
ps.setString(1, userId);
// 执行sql语句
rs = ps.executeQuery();
if (rs != null) {
while (rs.next()) {
hp.setUsername(rs.getString("username"));
hp.setCreateDate(rs.getString("createDate"));
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
// 关闭链接
DbConnection.closeDB(conn, ps, rs);
}
// 返回结果
return hp;
}
// 请求category分页数据
@Override
public CategoryPage categoryPageDao(String item, int categoryCp) {
// 声明jdbc变量
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
// 声明对象、变量
CategoryPage cp = new CategoryPage();
List<CategoryPageDetail> categoryPageDetail = new ArrayList<>();
try {
// 获取链接
conn = DbConnection.getConnection();
// 创建sql命令
String sql = "SELECT count(*) FROM recipe,recipe_category,category WHERE recipe.id = recipe_category.recipeId and recipe_category.category = category.id and category.id = ?";
String sql1 = "SELECT * FROM recipe,user_createrecipe,recipe_category,category WHERE recipe.id = recipe_category.recipeId and recipe_category.category = category.id and recipe.id = user_createrecipe.createRecipe and category.id = ? ORDER BY recipeId DESC LIMIT ?,8";
// 创建sql命令对象
ps = conn.prepareStatement(sql);
// 给占位符赋值
ps.setString(1, item);
// 执行sql语句
rs = ps.executeQuery();
if (rs != null) {
while (rs.next()) {
cp.setTotleCount(rs.getInt(1));
}
}
ps = conn.prepareStatement(sql1);
// 给占位符赋值
ps.setString(1, item);
ps.setInt(2, (categoryCp - 1) * 8);
rs = ps.executeQuery();
if (rs != null) {
while (rs.next()) {
CategoryPageDetail cpd = new CategoryPageDetail(rs.getInt("recipeId"), rs.getString("title"),
rs.getString("coverPath"), rs.getInt("userId"), rs.getString("username"));
categoryPageDetail.add(cpd);
cp.setCategoryPageDetail(categoryPageDetail);
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
// 关闭链接
DbConnection.closeDB(conn, ps, rs);
}
// 返回结果
return cp;
}
// 请求搜索分页
@Override
public SearchPage searchPageDao(int searchCp,String searchKeyword) {
// 声明jdbc变量
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
// 声明对象、变量
SearchPage sp = new SearchPage();
List<SearchPageDetail> searchPageDetail = new ArrayList<>();
try {
// 获取链接
conn = DbConnection.getConnection();
// 创建sql命令
String sql = "SELECT count(1) FROM recipe,user_createrecipe WHERE title LIKE '%"+searchKeyword+"%' AND recipe.id = user_createrecipe.createRecipe";
String sql1 = "SELECT * FROM recipe,user_createrecipe WHERE title LIKE '%"+searchKeyword+"%' AND recipe.id = user_createrecipe.createRecipe ORDER BY recipe.id DESC LIMIT ?,8";
// 创建sql命令对象
ps = conn.prepareStatement(sql);
// 执行sql语句
rs = ps.executeQuery();
if (rs != null) {
while (rs.next()) {
sp.setTotleCount(rs.getInt(1));
}
}
ps = conn.prepareStatement(sql1);
// 给占位符赋值
ps.setInt(1, (searchCp - 1) * 8);
rs = ps.executeQuery();
if (rs != null) {
while (rs.next()) {
SearchPageDetail spd = new SearchPageDetail(rs.getInt("recipe.id"), rs.getString("title"),
rs.getString("coverPath"), rs.getInt("userId"), rs.getString("username"));
searchPageDetail.add(spd);
sp.setSearchPageDetail(searchPageDetail);
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
// 关闭链接
DbConnection.closeDB(conn, ps, rs);
}
// 返回结果
return sp;
}
}
RecipeCollectionServlet
package yjf.psyd.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.mysql.cj.Session;
import yjf.psyd.bean.User;
import yjf.psyd.service.RecipeService;
import yjf.psyd.service.impl.RecipeServiceImpl;
@WebServlet("/recipeCollection")
public class RecipeCollectionServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public RecipeCollectionServlet() {
super();
}
// 处理菜谱收藏功能
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// 1、获取请求信息
String status = req.getParameter("status");
String RecipeId = req.getParameter("RecipeId");
// 获取session对象
HttpSession hs = req.getSession();
// 把session中的值传到user对象中
User user = (User) hs.getAttribute("user");
RecipeService rs = new RecipeServiceImpl();
// 2、判断status状态
if (status.equals("false")) {
// 3、处理请求结果;插入收藏菜谱
int index = rs.insertCollectionRecipe(RecipeId, user);
if(index>0) {
resp.getWriter().write("{\"index\":" + index + "}");
}
} else {
// 3、处理请求结果:删除收藏菜谱
int index = rs.deleteCollectionRecipe(RecipeId, user);
if(index>0) {
resp.getWriter().write("{\"index\":" + index + "}");
}
}
}
}
获取源码