商品信息的简单增删改查
1. 主页面<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
Insert title here
点击查询所有商品信息
2.查询全部页面
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
Insert title here
商品列表
商品序号
商品名称
商品图片
商品价格
商品描述
${con.count }
${product.pname}
${product.shop_price }
${product.pdesc }
修改商品
删除商品
3.添加页面
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
Insert title here
添加商品
4.修改页面
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
Insert title here
修改商品
5.工具类
package com.yynh.store.product.utils;
import java.sql.Connection;
import java.sql.SQLException;
import javax.sql.DataSource;
import com.mchange.v2.c3p0.ComboPooledDataSource;
public class C3p0Utils {
// 连接池就定义 并且加载配置完毕
// 命名配置
// private static DataSource dataSource=new ComboPooledDataSource("itcast");
// 默认配置
private static DataSource dataSource = new ComboPooledDataSource();
// c3p0+DBUtils
// DBUtils使用时，需要获取dataSource对象
public static DataSource getDataSource() {
return dataSource;
}
/**
* 获取链接方法
*/
public static Connection getConnection() {
Connection con = null;
try {
con = dataSource.getConnection();
} catch (SQLException e) {
e.printStackTrace();
throw new RuntimeException();
}
return con;
}
public static void main(String[] args) throws SQLException {
for (int i = 0; i < 40; i++) {
Connection con = C3p0Utils.getConnection();
System.out.println("获取到的" + con);
// 不会关闭con对象，C3P0已经帮我去增强了Connection close方法
con.close();
}
}
}
package com.yynh.store.product.utils;
import java.util.UUID;
public class UUIDUtils {
public static String getUUID() {
return UUID.randomUUID().toString().replaceAll("-", "");
}
}
6.javaBean
package com.yynh.store.product.domain;
import java.io.Serializable;
public class Category implements Serializable {
private String cid;
private String cname;
// 先创建category,作为主键
public String getCid() {
return cid;
}
public void setCid(String cid) {
this.cid = cid;
}
public String getCname() {
return cname;
}
public void setCname(String cname) {
this.cname = cname;
}
}
package com.yynh.store.product.domain;
import java.io.Serializable;
import java.util.Date;
public class Product implements Serializable {
/**
* pid varchar(32) NOT NULL,1111111111 pname varchar(50) DEFAULT NULL,1111111111 market_price double DEFAULT NULL, shop_price double DEFAULT NULL,1111111111 pimage varchar(200) DEFAULT NULL,11111111 pdate date DEFAULT NULL, 11111111 is_hot int(11) DEFAULT NULL, pdesc varchar(255) DEFAULT NULL, 11111111 pflag int(11) DEFAULT NULL, cid varchar(32) DEFAULT NULL,11111111
*/
private String pid;
private String pname;
private double shop_price;
private String pimage;
private Date pdate;
private String pdesc;
// 创建外键约束
private Category Category;
public Product() {
super();
// TODO Auto-generated constructor stub
}
public String getPid() {
return pid;
}
public void setPid(String pid) {
this.pid = pid;
}
public String getPname() {
return pname;
}
public void setPname(String pname) {
this.pname = pname;
}
public double getShop_price() {
return shop_price;
}
public void setShop_price(double shop_price) {
this.shop_price = shop_price;
}
public String getPimage() {
return pimage;
}
public void setPimage(String pimage) {
this.pimage = pimage;
}
public Date getPdate() {
return pdate;
}
public void setPdate(Date pdate) {
this.pdate = pdate;
}
public String getPdesc() {
return pdesc;
}
public void setPdesc(String pdesc) {
this.pdesc = pdesc;
}
public Category getCategory() {
return Category;
}
public void setCategory(Category category) {
Category = category;
}
@Override
public String toString() {
return "Product [pid=" + pid + ", pname=" + pname + ", shop_price=" + shop_price + ", pimage=" + pimage + ", pdate=" + pdate + ", pdesc=" + pdesc + ", Category=" + Category + "]";
}
}
7.servlet
package com.yynh.store.product.servlet;
import java.io.IOException;
import java.util.Date;
import java.util.Map;
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 com.yynh.store.product.domain.Category;
import com.yynh.store.product.domain.Product;
import com.yynh.store.product.service.ProductService;
import com.yynh.store.product.service.ProductServiceIml;
import com.yynh.store.product.utils.UUIDUtils;
/**
* Servlet implementation class AddProduct
*/
public class AddProduct extends HttpServlet {
private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
// 添加商品功能的实现
// 获取参数,封装实体
// 防止乱码
request.setCharacterEncoding("utf-8");
Product product = new Product();
Map map = request.getParameterMap();
// 封装数据
BeanUtils.populate(product, map);
// 手动封装外键
Category category = new Category();
String cid = request.getParameter("cid");
category.setCid(cid);
product.setCategory(category);
// 添加pdate和pid(pid用随意字符串来当做主键)
product.setPid(UUIDUtils.getUUID());
product.setPdate(new Date());
// 调用service方法,处理业务
ProductService service = new ProductServiceIml();
service.add(product);
// 数据回显
// 重定向到查询所有页面
response.sendRedirect(request.getContextPath() + "/showAll");
} catch (Exception e) {
// 防止乱码
response.setContentType("text/html;charset=utf-8");
// 出错时显示到浏览器中
response.getWriter().print("程序忙哦
");
}
}
}
package com.yynh.store.product.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.yynh.store.product.service.ProductService;
import com.yynh.store.product.service.ProductServiceIml;
/**
* Servlet implementation class Delete
*/
public class Delete extends HttpServlet {
private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
// 获取参数,封装对象
String pid = request.getParameter("pid");
// 调用service处理业务
ProductService service = new ProductServiceIml();
service.del(pid);
// 回显数据
response.sendRedirect(request.getContextPath() + "/showAll");
} catch (Exception e) {
response.setContentType("text/html;charset=utf-8");
response.getWriter().print("删除有误哦");
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
package com.yynh.store.product.servlet;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.yynh.store.product.domain.Category;
import com.yynh.store.product.service.ProductService;
import com.yynh.store.product.service.ProductServiceIml;
public class FindClist extends HttpServlet {
private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
// 获取category的list的servlet
// 没有参数
// 调用service方法
ProductService service = new ProductServiceIml();
List clist = service.findClist();
// 回显数据
request.setAttribute("clist", clist);
// 请求转发到添加页面
request.getRequestDispatcher("/save.jsp").forward(request, response);
} catch (Exception e) {
// 防止乱码
response.setContentType("text/html;charset=utf-8");
// 出错时显示到浏览器中
response.getWriter().print("程序忙哦
");
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
package com.yynh.store.product.servlet;
import java.io.IOException;
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 com.yynh.store.product.domain.Category;
import com.yynh.store.product.domain.Product;
import com.yynh.store.product.service.ProductService;
import com.yynh.store.product.service.ProductServiceIml;
/**
* Servlet implementation class Modify
*/
public class Modify extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
request.setCharacterEncoding("utf-8");
// 修改提交servlet
// 获取资源,封装实体
// System.out.println(request.getParameter("pid"));
String pid = request.getParameter("pid");
Product product = new Product();
BeanUtils.populate(product, request.getParameterMap());
// 手动封装cid
String cid = request.getParameter("cid");
Category category = new Category();
category.setCid(cid);
product.setCategory(category);
// 调用service
ProductService service = new ProductServiceIml();
service.modify(product);
// 回显数据
// 重定向到查询所有页面
response.sendRedirect(request.getContextPath() + "/showAll");
} catch (Exception e) {
// 防止乱码
response.setContentType("text/html;charset=utf-8");
// 出错时显示到浏览器中
response.getWriter().print("程序忙哦
");
}
}
}
package com.yynh.store.product.servlet;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.yynh.store.product.domain.Product;
import com.yynh.store.product.service.ProductService;
import com.yynh.store.product.service.ProductServiceIml;
public class ShowAll extends HttpServlet {
private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
// 获取数据,封住实体
// 调用service对象,处理业务
ProductService service = new ProductServiceIml();
List plist = service.showAll();
// 数据回显
request.setAttribute("plist", plist);
// 请求转发不需要项目名
System.out.println("哈哈哈");
request.getRequestDispatcher("/plist.jsp").forward(request, response);
} catch (Exception e) {
// 防止乱码
response.setContentType("text/html;charset=utf-8");
// 出错时显示到浏览器中
response.getWriter().print("程序忙哦
");
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
package com.yynh.store.product.servlet;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.yynh.store.product.domain.Category;
import com.yynh.store.product.domain.Product;
import com.yynh.store.product.service.ProductService;
import com.yynh.store.product.service.ProductServiceIml;
/**
* Servlet implementation class Update
*/
public class Update extends HttpServlet {
private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
// 修改页面的servlet
// 获取数据,封装实体
// 获取超链接中保存的pid
String pid = request.getParameter("pid");
Product product = new Product();
// 将pid封装到bean中
product.setPid(pid);
// 调用功能service处理
ProductService service = new ProductServiceIml();
// 调用功能方法,将封装好的bean传过去
Product result = service.showById(product);
request.setAttribute("product", result);
List clist = service.findClist();
// 回显数据
request.setAttribute("clist", clist);
// 请求转发到添加页面
request.getRequestDispatcher("/update.jsp").forward(request, response);
} catch (Exception e) {
// 防止乱码
response.setContentType("text/html;charset=utf-8");
// 出错时显示到浏览器中
response.getWriter().print("程序忙哦
");
}
}
}
8.service
package com.yynh.store.product.service;
import java.util.List;
import com.yynh.store.product.dao.ProductDao;
import com.yynh.store.product.dao.ProductDaoIml;
import com.yynh.store.product.domain.Category;
import com.yynh.store.product.domain.Product;
public class ProductServiceIml implements ProductService {
/**
* @author yynh_ 删除商品
*/
public void del(String pid) {
ProductDao pd = new ProductDaoIml();
pd.del(pid);
}
/**
* @author yynh_ 修改商品信息
*/
public void modify(Product product) {
ProductDao pd = new ProductDaoIml();
pd.modify(product);
}
/**
* @author yynh_ 根据id获取信息
*/
public Product showById(Product product) {
ProductDao pd = new ProductDaoIml();
Product p = pd.showById(product);
return p;
}
/**
* @author yynh_ 查询category的分类列表
*/
public List findClist() {
ProductDao pd = new ProductDaoIml();
List clist = pd.findClist();
return clist;
}
/**
* @author yynh_ 添加商品功能
*/
public void add(Product product) {
ProductDao pd = new ProductDaoIml();
pd.add(product);
}
/**
* @author yynh_ 查询全部商品功能
*/
public List showAll() {
ProductDao pd = new ProductDaoIml();
List plist = pd.showAll();
return plist;
}
}
9.dao
package com.yynh.store.product.dao;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.apache.commons.dbutils.handlers.MapHandler;
import com.yynh.store.product.domain.Category;
import com.yynh.store.product.domain.Product;
import com.yynh.store.product.utils.C3p0Utils;
public class ProductDaoIml implements ProductDao {
/**
* 删除商品
*/
public void del(String pid) {
QueryRunner run = new QueryRunner(C3p0Utils.getDataSource());
String sql = "delete from product where pid=?";
Object[] param = { pid };
try {
run.update(sql, param);
} catch (SQLException e) {
e.printStackTrace();
throw new RuntimeException();
}
}
/**
* 修改选中的商品信息
*/
public void modify(Product product) {
QueryRunner run = new QueryRunner(C3p0Utils.getDataSource());
String sql = "update product set pname=?,shop_price=?,pimage=?,pdesc=?,cid=? where pid=?";
Object[] param = { product.getPname(), product.getShop_price(), product.getPimage(), product.getPdesc(), product.getCategory().getCid(), product.getPid() };
try {
run.update(sql, param);
} catch (SQLException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
/**
* 获取选中的商品信息
*/
@Override
public Product showById(Product product) {
QueryRunner run = new QueryRunner(C3p0Utils.getDataSource());
String sql = "select * from product where pid=?";
Object[] param = { product.getPid() };
try {
// 为了能获取到produt中category的分类,必须要将所有的信息都获取到
Map map = run.query(sql, new MapHandler(), param);
Category category = new Category();
// 将category中的数据封装进去
BeanUtils.populate(category, map);
Product product2 = new Product();
// 将product中需要的数据封装进去
BeanUtils.populate(product2, map);
// 将category作为外键封装到product中
product2.setCategory(category);
return product2;
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
/**
* 获取category的分类信息
*/
public List findClist() {
List result = new ArrayList();
// 获取dbutils
QueryRunner run = new QueryRunner(C3p0Utils.getDataSource());
String sql = "select * from category";
try {
result = run.query(sql, new BeanListHandler(Category.class));
} catch (SQLException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
return result;
}
/**
* 添加商品
*
*/
public void add(Product product) {
// 获取dbutils的核心对象
QueryRunner run = new QueryRunner(C3p0Utils.getDataSource());
String sql = "insert into product values(?,?,?,?,?,?,?,?,?,?)";
// 设置属性
Object[] param = { product.getPid(), product.getPname(), null, product.getShop_price(), product.getPimage(), product.getPdate(), null, product.getPdesc(), null, product.getCategory().getCid() };
try {
run.update(sql, param);
} catch (SQLException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
public List showAll() {
/**
* 查询全部商品
*
*/
List result = new ArrayList();
// 获取dbutils
QueryRunner run = new QueryRunner(C3p0Utils.getDataSource());
// 排序
String sql = "select * from product order by pdate desc";
try {
result = run.query(sql, new BeanListHandler(Product.class));
} catch (SQLException e) {
// 将异常抛出去
throw new RuntimeException(e);
}
return result;
}
}