库存商品管理机试题

题目：添加更新库存
一、 语言和环境
a) 实现语言
java
b) 环境要求
eclipse,Oracle
二、 数据库设计
数据库名称：自定义
数据库表信息

表名 wareTable
主键 wareName
序号 字段名称 字段说明 类型 位数 属性 备注
1 wareName 商品名称 Varchar2 50 非空 主键
2 wareSort 商品类别 Number(4) 4 非空
3 wareAmount 库存量 Number(8) 8 非空

三、 要求
利用jsp、Javabean、JDBC技术，编写一个添加更新库存的web程序。要求根据输入商品名称，在数据库中查找该商品：
如果该商品为新增商品，则将商品信息添加如数据库表中；
如果该商品已经存在，则更新该商品的库存量，在原有库存量上增加输入的数量
1、 程序初始界面如图1所示：

图1：初始页面
2、 输入商品名称、选择类别和商品数量，点击“加入库存”按钮，根据具体情况给出相应提示信息，如图2、图3、图4、图5所示：

##1.创建数据库
CREATE TABLE waretable (
wareName varchar(50) NOT NULL,
wareSort int(11) NOT NULL,
wareAmount int(11) NOT NULL,
PRIMARY KEY (wareName)
)
##实体类

package com.neu.entity;

public class WareTable {
	private String wareName;
	private Integer wareSort;
	private Integer wareAmount;
	public WareTable() {
		super();
		// TODO 自动生成的构造函数存根
	}
	public WareTable(String wareName, Integer wareSort, Integer wareAmount) {
		super();
		this.wareName = wareName;
		this.wareSort = wareSort;
		this.wareAmount = wareAmount;
	}
	public String getWareName() {
		return wareName;
	}
	public void setWareName(String wareName) {
		this.wareName = wareName;
	}
	public Integer getWareSort() {
		return wareSort;
	}
	public void setWareSort(Integer wareSort) {
		this.wareSort = wareSort;
	}
	public Integer getWareAmount() {
		return wareAmount;
	}
	public void setWareAmount(Integer wareAmount) {
		this.wareAmount = wareAmount;
	}
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((wareAmount == null) ? 0 : wareAmount.hashCode());
		result = prime * result + ((wareName == null) ? 0 : wareName.hashCode());
		result = prime * result + ((wareSort == null) ? 0 : wareSort.hashCode());
		return result;
	}
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		WareTable other = (WareTable) obj;
		if (wareAmount == null) {
			if (other.wareAmount != null)
				return false;
		} else if (!wareAmount.equals(other.wareAmount))
			return false;
		if (wareName == null) {
			if (other.wareName != null)
				return false;
		} else if (!wareName.equals(other.wareName))
			return false;
		if (wareSort == null) {
			if (other.wareSort != null)
				return false;
		} else if (!wareSort.equals(other.wareSort))
			return false;
		return true;
	}
	@Override
	public String toString() {
		return "WareTable [wareName=" + wareName + ", wareSort=" + wareSort + ", wareAmount=" + wareAmount + "]";
	}
}

#wareTableDao的实现类

package com.neu.dao;

import java.sql.Connection;
import java.sql.ResultSet;

import com.neu.entity.WareTable;

public class WareTableDaoImpl implements WareTableDao {

	@Override
	public WareTable getByName(String wareName) throws Exception {
		Connection connection = JDBCUtil.getConnection();
		String sql = "select * from waretable where warename = ?";
		ResultSet rs = JDBCUtil.executeQuery(connection, sql, new Object[] {wareName});
		WareTable wareTable = null;
		if(rs.next()) {
			int wareSort = rs.getInt("wareSort");
			int wareAmount = rs.getInt("wareAmount");
			wareTable = new WareTable(wareName, wareSort, wareAmount);
		}
		JDBCUtil.closeConnection(connection);
		return wareTable;
	}

	@Override
	public int getInsert(WareTable wareTable) throws Exception {
		String sql= "insert into waretable values(?,?,?)";
		int n = JDBCUtil.executeUpdate(sql, new Object[] {wareTable.getWareName(),wareTable.getWareSort(),wareTable.getWareAmount()});
		return n;
	}

	@Override
	public int getUpdate(String wareName, int wareAmount) throws Exception {
		String sql = "update waretable set wareAmount = ? where wareName = ?";
		int n = JDBCUtil.executeUpdate(sql, new Object[] {wareAmount,wareName});
		return n;
	}
}

#1.

package com.neu.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 com.neu.entity.WareTable;
import com.neu.service.WareTableService;
import com.neu.service.WareTableServiceImpl;

/**
 * Servlet implementation class selectServlet
 */
@WebServlet("/selectServlet")
public class selectServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
    
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		
		String wareName = request.getParameter("wareName");
		int wareAmount =Integer.parseInt(request.getParameter("wareAmount"));
		int wareSort =Integer.parseInt(request.getParameter("wareSort"));
		
		WareTableService wareTableService = new WareTableServiceImpl();
		
		WareTable wareTable =null;
		try {
			wareTable = wareTableService.getByName(wareName);
		} catch (Exception e) {
			// TODO 自动生成的 catch 块
			e.printStackTrace();
		}
		
		 //查询信息
		String msg =null;
		if(wareTable !=null) {
			
			if(wareSort != wareTable.getWareSort()) {
				msg = "商品类别错误！\n请重新选择！";
				response.sendRedirect(request.getContextPath()+"/selware.jsp?msg="+msg);
				return;
			}
			//更改信息
			try {
				msg = "修改成功！";
				int n = wareTableService.getUpdate(wareName, (wareAmount+wareTable.getWareAmount()));
				response.sendRedirect(request.getContextPath()+"/selware.jsp?msg="+msg);
				
			} catch (Exception e) {
				// TODO 自动生成的 catch 块
				e.printStackTrace();
			}
		}else {
			msg = "无此商品，请添加！";
			request.getRequestDispatcher("/WEB-INF/ware/insware.jsp?msg="+msg).forward(request, response);
		}
		
	}

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

}

#2.

package com.neu.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 com.neu.entity.WareTable;
import com.neu.service.WareTableService;
import com.neu.service.WareTableServiceImpl;

/**
 * Servlet implementation class insertServlet
 */
@WebServlet("/insertServlet")
public class insertServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
    
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		
		String wareName = request.getParameter("wareName");
		int wareAmount =Integer.parseInt(request.getParameter("wareAmount"));
		int wareSort =Integer.parseInt(request.getParameter("wareSort"));
		
		WareTable wareTable = new WareTable(wareName, wareSort, wareAmount);
		WareTableService wareTableService = new WareTableServiceImpl();
		
		try {
			wareTableService.getInsert(wareTable);
			request.getRequestDispatcher("/selware.jsp").forward(request, response);
		} catch (Exception e) {
			// TODO 自动生成的 catch 块
			e.printStackTrace();
		}
	}

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

}

#3.selware.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>    
<!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>
	<c:if test="${!(empty param.msg) }">
		<script type="text/javascript">
			alert("${param.msg}");
		</script>
	</c:if>
	<form action="${pageContext.request.contextPath }/selectServlet" method="post">
		<table border="1" >
			<tr><th colspan="2"><h1>录入商品库存信息</h1></th></tr>
			<tr>
				<td>商品名称：</td>
				<td>
					<input type="text" name="wareName">
				</td>
			</tr>
			<tr>
				<td>商品类别：</td>
				<td>
					<input type="radio" name="wareSort" value="1">电器
					<input type="radio" name="wareSort" value="2">食品
					<input type="radio" name="wareSort" value="3">服装
				</td>
			</tr>
			<tr>
				<td>商品数量：</td>
				<td>
					<input type="text" name="wareAmount">
				</td>
			</tr>
			<tr>
				<td colspan="2">
					<input type="submit" value="加入库存">
					<input type="reset" value="重置">
				</td>
			</tr>
		</table>
	</form>
</body>
</html>

#4.insware.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>     
<!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>
	<c:if test="${!(empty param.msg) }">
		<script type="text/javascript">
			alert("${param.msg}");
		</script>
	</c:if>
	<form action="${pageContext.request.contextPath }/insertServlet" method="post">
		<table>
			<tr>
				<td>商品名称：</td>
				<td>
					<input type="text" name="wareName">
				</td>
			</tr>
			<tr>
				<td>商品类别：</td>
				<td>
					<input type="radio" name="wareSort" value="1">电器
					<input type="radio" name="wareSort" value="2">食品
					<input type="radio" name="wareSort" value="3">服装
				</td>
			</tr>
			<tr>
				<td>商品数量：</td>
				<td>
					<input type="text" name="wareAmount">
				</td>
			</tr>
			<tr>
				<td colspan="2">
					<input type="submit" value="添加">
					<input type="reset" value="重置">
				</td>
			</tr>
		</table>
	</form>
</body>
</html>