java第十三周测试记录

今天课上遇到了问题，在我的上一篇随笔，这个阻碍了我很长时间，而且上一次也是这个问题，真的吃一堑不长一智，这次我应该就记住了，嗯。

设计思路：

俩个库：

1.一个库存商品，商品的基本属性和商品的数量（数量这个数据与后面的库里面数据会结合）被称为库存数量。

2.一个库存商品出入库信息，有取货和送货的信息。

①我用一个Int型（flag）来区分，flag=0为出库，flag=1为入库。

②也有一个数量，是挪动数量，这个数量与前面那个库的数量有一定的关联，就是取出货后，那个库存数量会减少，当存入货后，那个库存数量会增加。

③剩下的属性全用字符串类型。

我采用的是jsp+severlet+dao+bean模式：

代码：

jsp：

主要函数表的几个jsp：

main.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>

<style>

body{ text-align:center} 

/* css注释：为了观察效果设置宽度 边框 高度等样式 */

</style>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>main</title>

</head>

<body>

<br><br><br><br><br><br><br>//格式好看一点,下面同理

<div>

<input type="button" onclick="test1()" value="ru_ku" style="width:200px;height:50px" />

<script >

function test1(){

var url = "ru_ku.jsp";

window.location.href= url;

}

</script>

</div>

<br><br><br><br><br>

<div>

<input type="button" onclick="test2()" value="chu_ku" style="width:200px;height:50px"/>

<script >

function test2(){

var url = "chu_ku.jsp";

window.location.href= url;

}

</script>

</div>

<br><br><br><br><br>

<div>

<input type="button" onclick="test3()" value="cha_ku" style="width:200px;height:50px"/>

<script >

function test3(){

var url = "cha_ku.jsp";

window.location.href= url;

}

</script>

</div>

<br><br><br><br><br>

<div>

<input type="button" onclick="test4()" value="ku" style="width:200px;height:50px"/>

<script >

function test4(){

var url = "ku.jsp";

window.location.href= url;

}

</script>

</div>

</body>

</html>

chuku.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>

<style>

	.a{

		margin-top: 20px;

	}

	.b{

		font-size: 20px;

		width: 160px;

		color: white;

		background-color: greenyellow;

	}

</style>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>add</title>

</head>

<body>

<div align="center">

		<h1 style="color: red;">出库信息填表</h1>

		<a href="main.jsp">返回主页</a>

		<form action="TableServlet?method=chu_ku" method="post">

			<div class="a">

				商品名<input type="text" id="name" name="name"/>

			</div>

			<div class="a">

				厂家名<input type="text" id="changjia" name="changjia" />

			</div>

			<div class="a">

				型号<input type="text" id="xinghao" name="xinghao" />

			</div>

				<div class="a">

				规格<input type="text" id="guige" name="guige" />

			</div>

				<div class="a">

				数量<input type="text" id="shuliang" name="shuliang" />

			</div>

			<div class="a">

				日期<input type="text" id="date" name="date" />

			</div>

				<div class="a">

				单位<input type="text" id="danwei" name="danwei" />

			</div>

				<div class="a">

				提货人<input type="text" id="renming" name="renming" />

			</div>

			<div class="a">

				<button type="submit" class="b">保   存</button>

			</div>

		</form>

	</div>

</body>

</html>

ru_ku.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>

<style>

	.a{

		margin-top: 20px;

	}

	.b{

		font-size: 20px;

		width: 160px;

		color: white;

		background-color: greenyellow;

	}

</style>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>add</title>

</head>

<body>

<div align="center">

		<h1 style="color: red;">入库信息填表</h1>

		<a href="main.jsp">返回主页</a>

		<form  method="post" action="TableServlet?action=in"  >

			<div class="a">

				商品名<input type="text" id="name" name="name"/>

			</div>

			<div class="a">

				厂家名<input type="text" id="changjia" name="changjia" />

			</div>

			<div class="a">

				型号<input type="text" id="xinghao" name="xinghao" />

			</div>

				<div class="a">

				规格<input type="text" id="guige" name="guige" />

			</div>

				<div class="a">

				数量<input type="text" id="shuliang" name="shuliang" />

			</div>

			<div class="a">

				日期<input type="text" id="date" name="date" />

			</div>

				<div class="a">

				单位<input type="text" id="danwei" name="danwei" />

			</div>

				<div class="a">

				送货人<input type="text" id="renming" name="renming" />

			</div>

			<div class="a">

				<button type="submit" class="b">保   存</button>

			</div>

		</form>

	</div>

</body>

</html>

接下来是操作商品库的jsp

ku.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>

<style>

body{ text-align:center} 

/* css注释：为了观察效果设置宽度 边框 高度等样式 */

</style>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>cang_ku</title>

</head>

<body>

<body>

<br><br><br><br><br><br><br>

<div>

<input type="button" onclick="test1()" value="cha_ku" style="width:200px;height:50px" />

<script >

function test1(){

var url = "cha_ku.jsp";

window.location.href= url;

}

</script>

</div>

<br><br><br><br><br>

<div>

<input type="button" onclick="test2()" value="add_ku" style="width:200px;height:50px"/>

<script >

function test2(){

var url = "add_ku.jsp";

window.location.href= url;

}

</script>

</div>

<br><br><br><br><br>

<div>

<input type="button" onclick="test3()" value="delete_ku" style="width:200px;height:50px"/>

<script >

function test3(){

var url = "delete_ku.jsp";

window.location.href= url;

}

</script>

</div>

<br><br><br><br><br>

</body>

</html>

add_ku.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>

<style>

	.a{

		margin-top: 20px;

	}

	.b{

		font-size: 20px;

		width: 160px;

		color: white;

		background-color: greenyellow;

	}

	</style>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>add_ku</title>

</head>

<body>

<div align="center">

		<h1 style="color: red;">库内物品录入</h1>

		<a href="ku.jsp">返回主页</a>

		<form action="GoodServlet?action=add" method="post" >

			<div class="a">

				商品名<input type="text" id="name" name="name"/>

			</div>

			<div class="a">

				厂家名<input type="text" id="changjia" name="changjia" />

			</div>

			<div class="a">

				型号<input type="text" id="xinghao" name="xinghao" />

			</div>

				<div class="a">

				规格<input type="text" id="guige" name="guige" />

			</div>

				<div class="a">

				数量<input type="text" id="number" name="number" />

			</div>

			<div class="a">

				<button type="submit" class="b">保   存</button>

			</div>

		</form>

	</div>

</body>

</html>

delete.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>

<style>

	.a{

		margin-top: 20px;

	}

	.b{

		font-size: 20px;

		width: 160px;

		color: white;

		background-color: greenyellow;

	}

</style>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>delete_ku</title>

</head>

<body>

<div align="center">

		<h1 style="color: red;">库内物品删除</h1>

		<a href="ku.jsp">返回主页</a>

		<form action="GoodServlet?action=delete" method="post" >

			<div class="a">

				商品名<input type="text" id="name" name="name"/>

			</div>

			<div class="a">

				厂家名<input type="text" id="changjia" name="changjia" />

			</div>

			<div class="a">

				型号<input type="text" id="xinghao" name="xinghao" />

			</div>

				<div class="a">

				规格<input type="text" id="guige" name="guige" />

			</div>

		</form>

	</div>

</body>

</html>

　　cha_ku.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>chao_zhao</title>

</head>

<body>

<div align="center">

		<h1 style="color: red;">库内物品查询</h1>

		<a href="ku.jsp">返回主页</a>

		<form action="GoodServlet?action=cha_xun" method="post" >

			<br><br><br><br><br><br><br><br><br>

			<br><br><br><br>

			<div class="a">

				<button type="submit" class="b">保   存</button>

			</div>

		</form>

	</div>

</body>

</html>

java代码：

Bean：

package com.jsp.bean;

public class Good_Bean {

	int id;

	String name;

	String xinghao;

	String guige;

	String changjia;

	int number;

	public Good_Bean()

	{}

	public Good_Bean(int id, String name,String changjia ,String xinghao, String guige, int number) {

		// TODO 自动生成的构造函数存根

		this.id=id;

		this.xinghao=xinghao;

		this.guige=guige;

		this.changjia=changjia;

		this.number=number;

	}

	public Good_Bean(String name, String changjia,String xinghao, String guige, int number) {

		// TODO 自动生成的构造函数存根

		this.xinghao=xinghao;

		this.guige=guige;

		this.changjia=changjia;

		this.number=number;

	}

	public int getId() {

		return id;

	}

	public void setId(int id) {

		this.id = id;

	}

	public String getName() {

		return name;

	}

	public void setName(String name) {

		this.name = name;

	}

	public String getXinghao() {

		return xinghao;

	}

	public void setXinghao(String xinghao) {

		this.xinghao = xinghao;

	}

	public String getGuige() {

		return guige;

	}

	public void setGuige(String guige) {

		this.guige = guige;

	}

	public String getChangjia() {

		return changjia;

	}

	public void setChangjia(String changjia) {

		this.changjia = changjia;

	}

	public int getNumber() {

		return number;

	}

	public void setNumber(int number) {

		this.number = number;

	}

}

package com.jsp.bean;

public class Table_Bean {

	int id;

	String name;

	String xinghao;

	String guige;

	String changjia;

	int shuliang;

	String date;

	String danwei;

	String renming;

	int flag;

	public Table_Bean(int id, String name, String changjia, String xinghao, String guige, String date,

			String danwei, String renming, int shuliang, int flag) {

		this.id=id;

		this.name=name;

		this.changjia=changjia;

		this.xinghao=xinghao;

		this.guige=guige;

		this.date=date;

		this.danwei=danwei;

		this.renming=renming;

		this.shuliang=shuliang;

		this.flag=flag;

		// TODO 自动生成的构造函数存根

	}

	public Table_Bean( String name, String changjia, String xinghao, String guige, String date,

			String danwei, String renming, int shuliang, int flag) {

		this.name=name;

		this.changjia=changjia;

		this.xinghao=xinghao;

		this.guige=guige;

		this.date=date;

		this.danwei=danwei;

		this.renming=renming;

		this.shuliang=shuliang;

		this.flag=flag;

		// TODO 自动生成的构造函数存根

	}

	public int getId() {

		return id;

	}

	public void setId(int id) {

		this.id = id;

	}

	public String getName() {

		return name;

	}

	public void setName(String name) {

		this.name = name;

	}

	public String getXinghao() {

		return xinghao;

	}

	public void setXinghao(String xinghao) {

		this.xinghao = xinghao;

	}

	public String getGuige() {

		return guige;

	}

	public void setGuige(String guige) {

		this.guige = guige;

	}

	public String getChangjia() {

		return changjia;

	}

	public void setChangjia(String changjia) {

		this.changjia = changjia;

	}

	public int getShuliang() {

		return shuliang;

	}

	public void setShuliang(int shuliang) {

		this.shuliang = shuliang;

	}

	public String getDate() {

		return date;

	}

	public void setDate(String date) {

		this.date = date;

	}

	public String getDanwei() {

		return danwei;

	}

	public void setDanwei(String danwei) {

		this.danwei = danwei;

	}

	public String getRenming() {

		return renming;

	}

	public void setRenming(String renming) {

		this.renming = renming;

	}

	public int getFlag() {

		return flag;

	}

	public void setFlag(int flag) {

		this.flag = flag;

	}

}

　　Dao：

package com.jsp.dao;

import java.sql.Connection;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import java.util.ArrayList;

import java.util.List;

import com.jsp.bean.Good_Bean;

import com.jsp.util.*;

public class Good_Dao {

	/**

	 *

	 * 查看数据是否存在

	 * @param name

	 * @param xinghao

	 * @param guige

	 * @param changjia

	 * @return

	 */

	public  boolean  cha_xun (String name,String xinghao,String guige,String changjia)

	{

		DButil DB= new DButil();

		int i =0;

		Connection con =DB.getConn("ku");

		try {

			Statement state = con.createStatement();

			ResultSet rs = state.executeQuery("select * from goods where name='" + name + "'");

			if (rs.next())

			{

				if(rs.getString("guige").equals(guige))

				{

					i++;

				}

				if(rs.getString("changjia").equals(changjia))

				{

					i++;

				}

				if(rs.getString("xinghao").equals(xinghao))

				{

					i++;

				}

			}

		} catch (SQLException e) {

			// TODO 自动生成的 catch 块

			e.printStackTrace();

		}

		if(i==3)

		{

			return true;

		}

		else

		{

			return false;

		}

	}

	public  int cha__xun(String name,String xinghao,String guige,String changjia)

	{

		DButil DB= new DButil();

		int i =0;

		int id=0;

		Connection con =DB.getConn("ku");

		try {

			Statement state = con.createStatement();

			ResultSet rs = state.executeQuery("select * from goods where name='" + name + "'");

			if (rs.next())

			{

				if(rs.getString("guige").equals(guige))

				{

					i++;

				}

				if(rs.getString("changjia").equals(changjia))

				{

					i++;

				}

				if(rs.getString("xinghao").equals(xinghao))

				{

					i++;

				}

				if(i==3)

				{

					id=rs.getInt("id");

				}

			}

		} catch (SQLException e) {

			// TODO 自动生成的 catch 块

			e.printStackTrace();

		}

		return id;

	}

	/**

	 * 全显示商品数据

	 * @return

	 */

	public List<Good_Bean> list() {

		DButil DB =new DButil();

		String sql = "select * from goods";

		List<Good_Bean> list = new ArrayList<>();

		Connection conn = DB.getConn();

		Statement state = null;

		ResultSet rs = null;

		try {

			state = conn.createStatement();

			rs = state.executeQuery(sql);

			Good_Bean good_bean = null;

			while (rs.next()) {

				int id2 = rs.getInt("id");

				String name2 = rs.getString("name");

				String changjia2 = rs.getString("changjia");

				String xinghao2 = rs.getString("xinghao");

				String guige2 = rs.getString("guige");

				int  number2 =rs.getInt("number");

				good_bean = new Good_Bean();

				good_bean.setId(id2);

				good_bean.setName(name2);

				good_bean.setChangjia(changjia2);

				good_bean.setXinghao(xinghao2);

				good_bean.setGuige(guige2);

				good_bean.setNumber(number2);

				list.add(good_bean);

			}

		} catch (SQLException e) {

			e.printStackTrace();

		} finally {

			DB.close(rs, state, conn);

		}

		return list;

	}

	/**

	 * 增加

	 * @param good_bean

	 * @return

	 */

	public boolean add(Good_Bean good_bean) {

		DButil DB =new DButil();

		String sql = "insert into goods(name, changjia, xinghao,guige,number) values('" + good_bean.getName() + "','" + good_bean.getChangjia() + "','" + good_bean.getXinghao() + "','" + good_bean.getGuige()+"','" + good_bean.getNumber()+"')";

		Connection conn = DB.getConn();

		Statement state = null;

		boolean f = false;

		int a = 0;

		try {

			state = conn.createStatement();

			a=state.executeUpdate(sql);

		} catch (Exception e) {

			e.printStackTrace();

		} finally {

			DB.close(state, conn);

		}

		if (a > 0) {

			f = true;

		}

		return f;

	}

/**

 * 删除

 * @param

 * @return

 */

public boolean delete (String name) {

	boolean f = false;

	String sql = "delete from goods where name='" + name + "'";

	DButil DB =new DButil();

	Connection conn = DB.getConn("goods");

	Statement state = null;

	int a = 0;

	try {

		state = conn.createStatement();

		a = state.executeUpdate(sql);

	} catch (SQLException e) {

		e.printStackTrace();

	} finally {

		DB.close(state, conn);

	}

	if (a > 0) {

		f = true;

	}

	return f;

}

}

package com.jsp.dao;

import java.sql.Connection;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import java.util.ArrayList;

import java.util.List;

import com.jsp.bean.Table_Bean;

import com.jsp.util.*;

public class Table_Dao {

	public List<Table_Bean> list() {

		DButil DB =new DButil();

		String sql = "select * from tab";

		List<Table_Bean> list = new ArrayList<>();

		Connection conn = DB.getConn("ku");

		Statement state = null;

		ResultSet rs = null;

		try {

			state = conn.createStatement();

			rs = state.executeQuery(sql);

			Table_Bean table_bean = null;

			while (rs.next()) {

				int id2 = rs.getInt("id");

				String name2 = rs.getString("name");

				String xinghao2 = rs.getString("xinghao");

				String changjia2 = rs.getString("changjia");

				String guige2 = rs.getString("guige");

				String date2 = rs.getString("date");

				String danwei2 = rs.getString("danwei");

				String renming2 = rs.getString("renming");

				int flag =rs.getInt("flag");

				int  shuliang2 =rs.getInt("shuliang");

				table_bean = new Table_Bean(id2, name2, changjia2,xinghao2,guige2,date2,danwei2,renming2,shuliang2,flag);

				list.add(table_bean);

			}

		} catch (SQLException e) {

			e.printStackTrace();

		} finally {

			DB.close(rs, state, conn);

		}

		return list;

	}

	public boolean _ku(Table_Bean table_bean) throws SQLException

	{

		DButil DB =new DButil();

		Connection conn = DB.getConn();

		Statement state = null;

		String sql = "insert into tab(name,changjia,xinghao,guige,date,danwei,renming,shuliang,flag) values('" + table_bean.getName() + "','" + table_bean.getChangjia() + "','" + table_bean.getXinghao() + "','" + table_bean.getGuige()+"','" + table_bean.getDate()+"','"+table_bean.getDanwei()+"','" + table_bean.getRenming()+"','" +table_bean.getShuliang()+"','" + table_bean.getFlag()+ "')";

		boolean f = false;

		int a=0;

		try {

			state = conn.createStatement();

			state.execute(sql);

			a=1;

		} catch (Exception e) {

			e.printStackTrace();

		} finally {

			DB.close(state,conn);

		}

		DB.close(state,conn);

		if (a > 0) {

			f = true;

		}

		return f;

	}

}

　　Severlet：

package com.jsp.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.List;

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.jsp.bean.Good_Bean;

import com.jsp.bean.Table_Bean;

import com.jsp.dao.Good_Dao;

import com.jsp.dao.Table_Dao;

/**

 * Servlet implementation class GoodServlet

 */

@WebServlet("/GoodServlet")

public class GoodServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

    /**

     * @see HttpServlet#HttpServlet()

     */

    public GoodServlet() {

        super();

        // TODO Auto-generated constructor stub

    }

	/**

	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

	 */

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		// TODO Auto-generated method stub

		request.setCharacterEncoding("UTF-8");

		response.setContentType("text/html;charsetUTF-8");

		response.setCharacterEncoding("UTF-8");

		String action=request.getParameter("action");

		if (action.equals("add")) {

			add( request,  response);

			}

		else if (action.equals("delete")) {

			delete( request,  response);

			}

		else if (action.equals("cha_xun")) {

			cha_xun( request,  response);

		}

		else

		{}

	}

	private void cha_xun(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {

		// TODO 自动生成的方法存根

		Good_Dao good_dao =new Good_Dao();

		List<Good_Bean> list = new ArrayList<>();

		request.setAttribute("goods", list);

		list =good_dao.list();

		PrintWriter out= response.getWriter();

		out = response.getWriter();

		out.println("仓库详情");

		for(int i=0;i<list.size();i++)

		{

			out.print("                                 ");

			out.print(list.get(i).getId()+" ");

			out.print(list.get(i).getChangjia()+" ");

			out.print(list.get(i).getXinghao()+" ");

			out.print(list.get(i).getGuige()+" ");

			out.print(list.get(i).getNumber()+" ");

			out.println();

			out.println();

		}

		//request.getRequestDispatcher("cha_ku.jsp").forward(request,response);

	}

	private void delete(HttpServletRequest request, HttpServletResponse response) {

		// TODO 自动生成的方法存根

		Good_Dao good_dao =new Good_Dao();

		String name = request.getParameter("name");

		String changjia = request.getParameter("changjia");

		String xinghao = request.getParameter("xinghao");

		String guige = request.getParameter("guige");

		if(good_dao.cha_xun(name, xinghao, guige, changjia))

		{

			good_dao.delete(name);

		}

	}

	private void add(HttpServletRequest request, HttpServletResponse response) {

		// TODO 自动生成的方法存根

		Good_Dao good_dao =new Good_Dao();

		String name = request.getParameter("name");

		String changjia = request.getParameter("changjia");

		String xinghao = request.getParameter("xinghao");

		String guige = request.getParameter("guige");

		String number = request.getParameter("number");

		 int i_number=Integer.parseInt(number);

		Good_Bean good_bean= new Good_Bean(name, changjia,xinghao, guige,i_number );

		good_dao.add(good_bean);

	}

	/**

	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

	 */

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		// TODO Auto-generated method stub

		doGet(request, response);

	}

}

package com.jsp.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.List;

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.jsp.bean.Good_Bean;

import com.jsp.bean.Table_Bean;

import com.jsp.dao.Good_Dao;

import com.jsp.dao.Table_Dao;

/**

 * Servlet implementation class TableServlet

 */

@WebServlet("/TableServlet")

public class TableServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

    /**

     * @see HttpServlet#HttpServlet()

     */

    public TableServlet() {

        super();

        // TODO Auto-generated constructor stub

    }

	/**

	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

	 */

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		// TODO Auto-generated method stub

		request.setCharacterEncoding("UTF-8");

		response.setContentType("text/html;charsetUTF-8");

		response.setCharacterEncoding("UTF-8");

		String action=request.getParameter("action");

		xian_shi(request,response);

		if (action.equals("in")) {

			try {

				ru_ku(request, response);

			} catch (SQLException e) {

				// TODO 自动生成的 catch 块

				e.printStackTrace();

			}

		} else if (action.equals("out")) {

			try {

				chu_ku(request, response);

			} catch (SQLException e) {

				// TODO 自动生成的 catch 块

				e.printStackTrace();

			}

		}

		else

		{}

		response.getWriter().append("Served at: ").append(request.getContextPath());

	}

private void xian_shi(HttpServletRequest request, HttpServletResponse response) throws IOException {

		// TODO 自动生成的方法存根

	Table_Dao table_dao =new Table_Dao();

	List<Table_Bean> list = new ArrayList<>();

	request.setAttribute("goods", list);

	list =table_dao.list();

	PrintWriter out= response.getWriter();

	out = response.getWriter();

	out.println("仓库搬运详情");

	for(int i=0;i<list.size();i++)

	{

		out.print("                                 ");

		out.print(list.get(i).getId()+" ");

		out.print(list.get(i).getChangjia()+" ");

		out.print(list.get(i).getXinghao()+" ");

		out.print(list.get(i).getGuige()+" ");

		out.print(list.get(i).getDate()+" ");

		out.print(list.get(i).getDanwei()+" ");

		out.print(list.get(i).getRenming()+" ");

		out.print(list.get(i).getShuliang()+" ");

		out.print(list.get(i).getFlag()+" ");

		out.println();

		out.println();

	}

	}

/**

 * flag=0是出库

 * @param request

 * @param response

 * @throws SQLException

 */

	private void chu_ku(HttpServletRequest request, HttpServletResponse response) throws SQLException {

		// TODO 自动生成的方法存根

		Table_Dao table_dao =new Table_Dao();

		String name = request.getParameter("name");

		String changjia = request.getParameter("changjia");

		String xinghao = request.getParameter("xinghao");

		String guige = request.getParameter("guige");

		String danwei = request.getParameter("danwei");

		String renming = request.getParameter("renming");

		String shuliang = request.getParameter("shuliang");

		String date = request.getParameter("date");

	     int i_shuliang=Integer.parseInt(shuliang);

	     int flag =0;

	     Table_Bean table_bean= new Table_Bean(name, changjia,xinghao, guige, date, danwei, renming, i_shuliang, flag );

		table_dao._ku(table_bean);

	}

/**

 * flag=1是入库

 * @param request

 * @param response

 * @throws IOException

 * @throws ServletException

 * @throws SQLException

 */

	private void ru_ku(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException, SQLException {

		// TODO 自动生成的方法存根

		Table_Dao table_dao =new Table_Dao();

		String name = request.getParameter("name");

		String changjia = request.getParameter("changjia");

		String xinghao = request.getParameter("xinghao");

		String guige = request.getParameter("guige");

		String danwei = request.getParameter("danwei");

		String renming = request.getParameter("renming");

		String shuliang = request.getParameter("shuliang");

		String date = request.getParameter("date");

		 int i_shuliang=Integer.parseInt(shuliang);

	     int flag =1;

		PrintWriter out= response.getWriter();

			out = response.getWriter();

			out.println("入库成功");

			Table_Bean table_bean= new Table_Bean(name, changjia,xinghao, guige, date, danwei, renming, i_shuliang, flag );

			table_bean.setShuliang(i_shuliang);

			table_dao._ku(table_bean);

			out.println(table_bean.getName());

		request.getRequestDispatcher("ru_ku.jsp").forward(request,response);

	}

	/**

	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

	 */

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		// TODO Auto-generated method stub

		doGet(request, response);

	}

}

DB：

package com.jsp.util;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

/**

 * 数据库的工具类

 *

 * @author 达达超可爱

 *

 */

public final class DButil {

	/**

	 * 数据库的连接函数

	 * 库名    账号   密码

	 * @return 数据库的连接

	 *

	 */

	public  Connection getConn(String date_Base,String root,String password)

	{

		Connection connection =null;

		// student 为数据库名称  ？ 后面加的是条件

		String db_url1="jdbc:mysql://localhost:3306/";

		String db_url2="?serverTimezone=UTC";

		String db_url=db_url1+date_Base+db_url2;

		try {

			Class.forName("com.mysql.cj.jdbc.Driver");

			connection = DriverManager.getConnection(db_url, root, password);

			// System.out.println("Success connect MySql server!");  

		} catch (Exception e) {

		}

		return connection;

	}

	public  Connection getConn(String date_Base)

	{

		Connection connection =null;

		// student 为数据库名称  ？ 后面加的是条件

		String db_url1="jdbc:mysql://localhost:3306/";

		String db_url2="?serverTimezone=UTC";

		String db_url=db_url1+date_Base+db_url2;

		try {

			Class.forName("com.mysql.cj.jdbc.Driver");

			connection = DriverManager.getConnection(db_url, "root", "123456");

			// System.out.println("Success connect MySql server!");  

		} catch (Exception e) {

		}

		return connection;

	}

	/**

	 *  数据库的连接函数

	 *  可修改的

	 *

	 * @return 数据库的连接

	 */

	public  Connection getConn()

	{

		Connection connection =null;

		// student 为数据库名称  ？ 后面加的是条件

		String db_url="jdbc:mysql://localhost:3306/ku?serverTimezone=UTC";

		try {

			Class.forName("com.mysql.cj.jdbc.Driver");

			connection = DriverManager.getConnection(db_url, "root", "123456");

			// System.out.println("Success connect MySql server!");  

		} catch (Exception e) {

		}

		return connection;

	}

	public void close(Connection con)

	{

		if(con!=null)

		{

			try {

				con.close();

			} catch (SQLException e) {

				e.printStackTrace();

			}

		}

	}

	public  void close(Statement state, Connection conn) {

		if (state != null) {

			try {

				state.close();

			} catch (SQLException e) {

				e.printStackTrace();

			}

		}

		if (conn != null) {

			try {

				conn.close();

			} catch (SQLException e) {

				e.printStackTrace();

			}

		}

	}

	public  void close(ResultSet rs, Statement state, Connection conn) {

		if (rs != null) {

			try {

				rs.close();

			} catch (SQLException e) {

				e.printStackTrace();

			}

		}

		if (state != null) {

			try {

				state.close();

			} catch (SQLException e) {

				e.printStackTrace();

			}

		}

		if (conn != null) {

			try {

				conn.close();

			} catch (SQLException e) {

				e.printStackTrace();

			}

		}

	}

}

遇到的问题：

1.我上面说的问题

2.如何做到俩个库里面数量的关系

3.查询理解错误：我是把所有信息输出出来，而不是按照相关数据查找，我会在之后改正。

4.tomacat8080占用问题：打开任务管理器，把正在用的但是不给显示界面的关掉。

5.时间输入问题，我是把时间按照String输入，在网上查了怎样把Date改成String。

运行截图：

显示全部数据：

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