搭建环境

• 拷贝HTML内容
  
  

• 工具类和c3p0配置文件
  
  

• 导入jar包
  
  

1.3.2 数据库及表

-- 创建数据库

drop database if exists `day20_db`;

create database `day20_db`;

-- 使用数据库

use day20_db;

-- 创建商品表

CREATE TABLE `product` (

  `pid` varchar(32) NOT NULL,

  `pname` varchar(50) DEFAULT NULL,  #商品名称

  `market_price` double DEFAULT NULL, #商场价

  `shop_price` double DEFAULT NULL,  #商城价

  `pimage` varchar(200) DEFAULT NULL, #商品图片路径

  `pdate` date DEFAULT NULL,   #上架时间

  `is_hot` int(11) DEFAULT NULL,  #是否热门：0=不热门,1=热门

  `pdesc` varchar(255) DEFAULT NULL, #商品描述

  `pflag` int(11) DEFAULT 0,   #商品标记：0=未下架(默认值),1=已经下架

  `cid` varchar(32) DEFAULT NULL,  #分类id

  PRIMARY KEY (`pid`)

) ;

1.3.3 JavaBean

• 分类：Category
  
  

public class Category {

private String cid;

private String cname;

• 商品：Product
  
  

public class Product {

private String pid;

private String pname;

private Double market_price;

private Double shop_price;

private String pimage;

private Date pdate;

private Integer is_hot; // 0 不是热门  1：热门

private String pdesc;

private Integer pflag; // 0 未下架    1：已经下架

// 分类

private String category_id;

1.3.4 修改JSP，确定入口

• 修改jsp页面，确定查询入口
  
  

1.3.5 编写servlet

• 编写servlet实现类
  
  

public class ProductFindAllServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

//1

//2 通知service，查询所有商品

ProductService productService = new ProductService();

List<Product> allProduct = productService.findAll();

//3 选择jsp

//3.1 将查询结果存放在request作用域

request.setAttribute("allProduct", allProduct);

//3.2 请求转发

request.getRequestDispatcher("/admin/product/product_list.jsp").forward(request, response);

}

• web.xml配置
  
  

<servlet>

<servlet-name>ProductFindAllServlet</servlet-name>

<servlet-class>cn.com.javahelp.web.servlet.ProductFindAllServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>ProductFindAllServlet</servlet-name>

<url-pattern>/productFindAllServlet</url-pattern>

</servlet-mapping>

1.3.6 service层

• 编写ProductService，添加findAll()方法
  
  

/**

* 查询所有

* @return

*/

public List<Product> findAll(){

return productDao.findAll();

}

1.3.7 dao层

• 编写ProductDao，添加findAll()方法
  
  

/**

* 查询所有

* @return

*/

public List<Product> findAll(){

try {

QueryRunner queryRunner = new QueryRunner(C3P0Utils.getDataSource());

String sql = "select * from product";

Object[] params = {};

return queryRunner.query(sql, new BeanListHandler<Product>(Product.class), params);

} catch (Exception e) {

throw new RuntimeException(e);

}

}

1.3.8 修改JSP，显示数据

• jsp页面数据显示
  
  

页面位置：/day13_findall/WebContent/admin/product/product_list.jsp

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<%--列表项 start --%>

<c:forEach items="${allProduct}" var="product">

<tr

onmouseout="this.style.backgroundColor = '#fff';">

<td style="CURSOR: hand; HEIGHT: 22px">

<img src="${pageContext.request.contextPath}/images/products/duanxue3.png" style="height: 140px;width:100px" />

</td>

<td style="CURSOR: hand; HEIGHT: 22px">

${product.category_id}

</td>

<td style="CURSOR: hand; HEIGHT: 22px">

${product.pname}

</td>

<td style="CURSOR: hand; HEIGHT: 22px">

${product.price}

</td>

<td style="CURSOR: hand; HEIGHT: 22px">

${product.description}

</td>

<td style="HEIGHT: 22px">

<a href="../user/edit.html?userID=15">

<img src="${pageContext.request.contextPath}/images/i_edit.gif" border="0" style="CURSOR: hand">

</a>

</td>

<td style="HEIGHT: 22px">

<a href="../user/view.html?userID=15">

<img src="${pageContext.request.contextPath}/images/button_view.gif" border="0" style="CURSOR: hand">

</a>

</td>

<td style="HEIGHT: 22px">

<a href="../user/list.html?userID=15">

<img src="${pageContext.request.contextPath}/images/i_del.gif" width="16" height="16" border="0" style="CURSOR: hand">

</a>

</td>

</tr>

</c:forEach>

<%--列表项 end --%>

搭建环境

• 拷贝HTML内容
  
  

• 工具类和c3p0配置文件
  
  

• 导入jar包
  
  

1.3.2 数据库及表

-- 创建数据库

drop database if exists `day20_db`;

create database `day20_db`;

-- 使用数据库

use day20_db;

-- 创建商品表

CREATE TABLE `product` (

  `pid` varchar(32) NOT NULL,

  `pname` varchar(50) DEFAULT NULL,  #商品名称

  `market_price` double DEFAULT NULL, #商场价

  `shop_price` double DEFAULT NULL,  #商城价

  `pimage` varchar(200) DEFAULT NULL, #商品图片路径

  `pdate` date DEFAULT NULL,   #上架时间

  `is_hot` int(11) DEFAULT NULL,  #是否热门：0=不热门,1=热门

  `pdesc` varchar(255) DEFAULT NULL, #商品描述

  `pflag` int(11) DEFAULT 0,   #商品标记：0=未下架(默认值),1=已经下架

  `cid` varchar(32) DEFAULT NULL,  #分类id

  PRIMARY KEY (`pid`)

) ;

1.3.3 JavaBean

• 分类：Category
  
  

public class Category {

private String cid;

private String cname;

• 商品：Product
  
  

public class Product {

private String pid;

private String pname;

private Double market_price;

private Double shop_price;

private String pimage;

private Date pdate;

private Integer is_hot; // 0 不是热门  1：热门

private String pdesc;

private Integer pflag; // 0 未下架    1：已经下架

// 分类

private String category_id;

1.3.4 修改JSP，确定入口

• 修改jsp页面，确定查询入口
  
  

1.3.5 编写servlet

• 编写servlet实现类
  
  

public class ProductFindAllServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

//1

//2 通知service，查询所有商品

ProductService productService = new ProductService();

List<Product> allProduct = productService.findAll();

//3 选择jsp

//3.1 将查询结果存放在request作用域

request.setAttribute("allProduct", allProduct);

//3.2 请求转发

request.getRequestDispatcher("/admin/product/product_list.jsp").forward(request, response);

}

• web.xml配置
  
  

<servlet>

<servlet-name>ProductFindAllServlet</servlet-name>

<servlet-class>cn.com.javahelp.web.servlet.ProductFindAllServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>ProductFindAllServlet</servlet-name>

<url-pattern>/productFindAllServlet</url-pattern>

</servlet-mapping>

1.3.6 service层

• 编写ProductService，添加findAll()方法
  
  

/**

* 查询所有

* @return

*/

public List<Product> findAll(){

return productDao.findAll();

}

1.3.7 dao层

• 编写ProductDao，添加findAll()方法
  
  

/**

* 查询所有

* @return

*/

public List<Product> findAll(){

try {

QueryRunner queryRunner = new QueryRunner(C3P0Utils.getDataSource());

String sql = "select * from product";

Object[] params = {};

return queryRunner.query(sql, new BeanListHandler<Product>(Product.class), params);

} catch (Exception e) {

throw new RuntimeException(e);

}

}

1.3.8 修改JSP，显示数据

• jsp页面数据显示
  
  

页面位置：/day13_findall/WebContent/admin/product/product_list.jsp

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<%--列表项 start --%>

<c:forEach items="${allProduct}" var="product">

<tr

onmouseout="this.style.backgroundColor = '#fff';">

<td style="CURSOR: hand; HEIGHT: 22px">

<img src="${pageContext.request.contextPath}/images/products/duanxue3.png" style="height: 140px;width:100px" />

</td>

<td style="CURSOR: hand; HEIGHT: 22px">

${product.category_id}

</td>

<td style="CURSOR: hand; HEIGHT: 22px">

${product.pname}

</td>

<td style="CURSOR: hand; HEIGHT: 22px">

${product.price}

</td>

<td style="CURSOR: hand; HEIGHT: 22px">

${product.description}

</td>

<td style="HEIGHT: 22px">

<a href="../user/edit.html?userID=15">

<img src="${pageContext.request.contextPath}/images/i_edit.gif" border="0" style="CURSOR: hand">

</a>

</td>

<td style="HEIGHT: 22px">

<a href="../user/view.html?userID=15">

<img src="${pageContext.request.contextPath}/images/button_view.gif" border="0" style="CURSOR: hand">

</a>

</td>

<td style="HEIGHT: 22px">

<a href="../user/list.html?userID=15">

<img src="${pageContext.request.contextPath}/images/i_del.gif" width="16" height="16" border="0" style="CURSOR: hand">

</a>

</td>

</tr>

</c:forEach>

<%--列表项 end --%>