查看所有商品

index.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
	<a href="${pageContext.request.contextPath}/find">查看所有商品</a>
</body>
</html>

product_list.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
	<table border="1" align="center">
		<tr>
			<td>id</td>
			<td>商品名称</td>
			<td>单价</td>
			<td>描述</td>
		
		</tr>
		<c:forEach items="${list}" var="p">
			<tr>
			<td>${p.id }</td>
			<td>${p.pname }</td>
			<td>${p.price }</td>
			<td>${p.pdesc }</td>
		
			</tr>
		
		
		</c:forEach>
	
	</table>
</body>
</html>

servlet

package com.xin.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.xin.bean.Product;
import com.xin.service.ProductService;

/**
 * 查看所有商品
 */
public class FindAllServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;


	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		//调用service返回list
		List<Product> list=null;
		list=new ProductService().findAll();
		//将list放入request域中
		request.setAttribute("list", list);
		//请求转发
		request.getRequestDispatcher("/product_list.jsp").forward(request,response);
	}

	
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

service

package com.xin.service;

import java.util.List;

import com.xin.bean.Product;
import com.xin.dao.ProductDao;

public class ProductService {
	public List<Product> findAll(){
		
		return new ProductDao().findAll();
	}
}

dao

package com.xin.dao;

import java.sql.SQLException;
import java.util.List;

import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import com.xin.bean.Product;
import com.xin.utils.DataSourceUtils;

public class ProductDao {
	public List<Product> findAll(){
		QueryRunner qr=new QueryRunner(DataSourceUtils.getDataSource());
		//编写sql
		String sql="select * from product";
		
		try {
			return qr.query(sql,new BeanListHandler<>(Product.class));
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
}

bean

package com.xin.bean;

public class Product {
	private int id;
	private String pname;
	private double price;
	private String pdesc;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getPname() {
		return pname;
	}
	public void setPname(String pname) {
		this.pname = pname;
	}
	public double getPrice() {
		return price;
	}
	public void setPrice(double price) {
		this.price = price;
	}
	public String getPdesc() {
		return pdesc;
	}
	public void setPdesc(String pdesc) {
		this.pdesc = pdesc;
	}
	
}

猜你喜欢