库存物资管理系统

话不多说，上代码

GoodBean.java

package bean;

public class GoodBean {
    private String name;
    private String manufacturer;
    private String type;
    private String spec;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getManufacturer() {
        return manufacturer;
    }
    public void setManufacturer(String manufacturer) {
        this.manufacturer = manufacturer;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    public String getSpec() {
        return spec;
    }
    public void setSpec(String spec) {
        this.spec = spec;
    }
}

FormBean.java:

package bean;

public class FormBean extends GoodBean{
    private int number;
    private String date;
    private String time;
    private String name1;
    private String name2;
    private String formType;
    public int getNumber() {
        return number;
    }
    public void setNumber(int number) {
        this.number = number;
    }
    public String getDate() {
        return date;
    }
    public void setDate(String date) {
        this.date = date;
    }
    public String getTime() {
        return time;
    }
    public void setTime(String time) {
        this.time = time;
    }
    public String getName1() {
        return name1;
    }
    public void setName1(String name1) {
        this.name1 = name1;
    }
    public String getName2() {
        return name2;
    }
    public void setName2(String name2) {
        this.name2 = name2;
    }
    public String getFormType() {
        return formType;
    }
    public void setFormType(String formType) {
        this.formType = formType;
    }
}

GoodDao.java:

package dao;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
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 javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import bean.FormBean;
import bean.GoodBean;
import util.DBUtil;

public class GoodDao extends HttpServlet {
    private static final long serialVersionUID = 1L;
    protected void service(HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException{
        request.setCharacterEncoding("UTF-8");
        String method = request.getParameter("method");
        if("insert".equals(method))
            insert(request, response);
        else if("delete".equals(method))
            delete(request, response);else if("query".equals(method))
            query(request, response);
    }
    private void insert(HttpServletRequest request, HttpServletResponse response) {
        try {
            request.setCharacterEncoding("UTF-8");
            String name = request.getParameter("name");
            String manufacturer = request.getParameter("manufacturer");
            String type = request.getParameter("type");
            String spec = request.getParameter("spec");
            if(name==""||manufacturer==""||type==""||spec=="")
                response.sendRedirect(request.getContextPath() + "/admin/Insert2.jsp?status=0");  //0代表某些信息为空
            else {
                Connection conn = DBUtil.getConn();
                Statement st = conn.createStatement();
                String sql = "select * from good where name='"+ name + "'and manufacturer='" + manufacturer + "'and type='" + type + "'and spec='" + spec + "'";
                ResultSet i = st.executeQuery(sql);
                if(!i.next()) {
                    sql = "insert into good values('"+ name + "','" + manufacturer + "','" + type + "','" + spec + "')";
                    st.executeUpdate(sql);
                    response.sendRedirect(request.getContextPath() + "/admin/Insert2.jsp?status=1");  //1代表录入成功
                }
                else
                    response.sendRedirect(request.getContextPath() + "/admin/Insert2.jsp?status=2");  //2代表该信息已存在
                DBUtil.close(st, conn);
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
    private void delete(HttpServletRequest request, HttpServletResponse response) {
        String i = request.getParameter("i");
        List<GoodBean> list = (List<GoodBean>) request.getSession().getAttribute("l");
        String sql = "delete from good where ";
        sql += "name='" + list.get(Integer.parseInt(i)).getName() + "' and ";
        sql += "manufacturer='" + list.get(Integer.parseInt(i)).getManufacturer() + "' and ";
        sql += "type='" + list.get(Integer.parseInt(i)).getType() + "' and ";
        sql += "spec='" + list.get(Integer.parseInt(i)).getSpec() + "'";
        System.out.println(i);
        System.out.println(sql);
        Connection conn = DBUtil.getConn();
        try {
            Statement st = conn.createStatement();
            st.executeUpdate(sql);
            response.sendRedirect(request.getContextPath() + "/admin/Query2.jsp?status=3");  //3代表删除成功
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    private void modify(HttpServletRequest request, HttpServletResponse response) {
        
    }
    private void query(HttpServletRequest request, HttpServletResponse response) {
        try {
            request.setCharacterEncoding("UTF-8");
            Connection conn = DBUtil.getConn();
            Statement st = conn.createStatement();
            HttpSession session = request.getSession();
            List<GoodBean> list = new ArrayList<>();
            ResultSet rs = null;
            GoodBean gb = null;
            String name = request.getParameter("name");
            String manufacturer = request.getParameter("manufacturer");
            String type = request.getParameter("type");
            String spec = request.getParameter("spec");
            String sql = "select * from good where ";
            if(name!="")
                sql += "name='" + name + "'";
            if(manufacturer!="") {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "manufacturer='" + manufacturer + "'";
            }
            if(type!="") {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "type='" + type + "'";
            }
            if(spec!="") {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "spec='" + spec + "'";
            }
            System.out.println(sql);
            if(sql.indexOf("=")==-1)
                response.sendRedirect(request.getContextPath() + "/admin/Query2.jsp?status=0");   //0代表所有项均为空
            rs = st.executeQuery(sql);
            while(rs.next()) {
                gb = new GoodBean();
                gb.setName(rs.getString("name"));
                gb.setManufacturer(rs.getString("manufacturer"));
                gb.setType(rs.getString("type"));
                gb.setSpec(rs.getString("spec"));
                list.add(gb);
            }
            DBUtil.close(st, conn);
            session.setAttribute("list",list);
            if(list.size()==0)
                response.sendRedirect(request.getContextPath() + "/admin/Query2.jsp?status=1");   //1代表不存在该信息
            else
                response.sendRedirect(request.getContextPath() + "/admin/Query2.jsp?status=2");   //2代表查询到信息
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

FormDao.java:

package dao;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
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 javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import bean.FormBean;
import util.DBUtil;

public class FormDao extends HttpServlet {
    private static final long serialVersionUID = 1L;
    protected void service(HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException{
        request.setCharacterEncoding("UTF-8");
        String method = request.getParameter("method");
        if("insert".equals(method))
            insert(request, response);
        else if("delete".equals(method))
            delete(request, response);
        else if("query".equals(method))
            query(request, response);
    }
    private void insert(HttpServletRequest request, HttpServletResponse response) {
        try {
            request.setCharacterEncoding("UTF-8");
            String name = request.getParameter("name");
            String manufacturer = request.getParameter("manufacturer");
            String type = request.getParameter("type");
            String spec = request.getParameter("spec");
            String number = request.getParameter("number");
            String date = request.getParameter("date");
            String time = request.getParameter("time");
            String name1 = request.getParameter("name1");
            String name2 = request.getParameter("name2");
            String formType = request.getParameter("formType");
            if(name==""||manufacturer==""||type==""||spec==""||number==""||date==""||time==""||name1==""||name2==""||formType=="")
                response.sendRedirect(request.getContextPath() + "/admin/Insert.jsp?status=0");  //0代表某些信息为空
            else if(number.matches("[^0-9]+"))
                response.sendRedirect(request.getContextPath() + "/admin/Insert.jsp?status=1");  //1代表数量不对
            else {
                Connection conn = DBUtil.getConn();
                Statement st = conn.createStatement();
                String sql = "select * from good where name='"+ name + "'and manufacturer='" + manufacturer + "'and type='" + type + "'and spec='" + spec + "'";
                ResultSet i = st.executeQuery(sql);
                if(!i.next()) {
                    sql = "insert into good values('"+ name + "','" + manufacturer + "','" + type + "','" + spec + "')";
                    st.executeUpdate(sql);
                }
                sql = "insert into form values('"+ name + "','" + manufacturer + "','" + type + "','" + spec + "','" + number + "','" + date + "','" + time + "','" + name1 + "','" + name2 + "','" + formType + "')";
                st.executeUpdate(sql);
                DBUtil.close(st, conn);
                response.sendRedirect(request.getContextPath() + "/admin/Insert.jsp?status=2");  //2代表录入成功
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
    private void delete(HttpServletRequest request, HttpServletResponse response) {
        String i = request.getParameter("i");
        List<FormBean> list = (List<FormBean>) request.getSession().getAttribute("l");
        String sql = "delete from form where ";
        sql += "name='" + list.get(Integer.parseInt(i)).getName() + "' and ";
        sql += "manufacturer='" + list.get(Integer.parseInt(i)).getManufacturer() + "' and ";
        sql += "type='" + list.get(Integer.parseInt(i)).getType() + "' and ";
        sql += "spec='" + list.get(Integer.parseInt(i)).getSpec() + "' and ";
        sql += "number=" + list.get(Integer.parseInt(i)).getNumber() + " and ";
        sql += "date='" + list.get(Integer.parseInt(i)).getDate() + "' and ";
        sql += "time='" + list.get(Integer.parseInt(i)).getTime() + "' and ";
        sql += "name1='" + list.get(Integer.parseInt(i)).getName1() + "' and ";
        sql += "name2='" + list.get(Integer.parseInt(i)).getName2() + "' and ";
        sql += "formType='" + list.get(Integer.parseInt(i)).getFormType() + "'";
        Connection conn = DBUtil.getConn();
        try {
            Statement st = conn.createStatement();
            st.executeUpdate(sql);
            response.sendRedirect(request.getContextPath() + "/admin/Query.jsp?status=4");  //4代表删除成功
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    private void query(HttpServletRequest request, HttpServletResponse response) {
        try {
            request.setCharacterEncoding("UTF-8");
            Connection conn = DBUtil.getConn();
            Statement st = conn.createStatement();
            HttpSession session = request.getSession();
            List<FormBean> list = new ArrayList<>();
            ResultSet rs = null;
            FormBean fb = null;
            String name = request.getParameter("name");
            String manufacturer = request.getParameter("manufacturer");
            String type = request.getParameter("type");
            String spec = request.getParameter("spec");
            String number = request.getParameter("number");
            String date = request.getParameter("date");
            String time = request.getParameter("time");
            String name1 = request.getParameter("name1");
            String name2 = request.getParameter("name2");
            String formType = request.getParameter("formType");
            String sql = "select * from form where ";
            if(number!="" && number.matches("[^0-9]+"))
                response.sendRedirect(request.getContextPath() + "/admin/Query.jsp?status=0");  //0代表数量不对
            if(name!="")
                sql += "name='" + name + "'";
            if(manufacturer!="") {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "manufacturer='" + manufacturer + "'";
            }
            if(type!="") {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "type='" + type + "'";
            }
            if(spec!="") {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "spec='" + spec + "'";
            }
            if(number!="") {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "number=" + number;
            }
            if(date!="") {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "date='" + date + "'";
            }
            if(time!="") {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "time='" + time + "'";
            }
            if(name1!="") {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "name1='" + name1 + "'";
            }
            if(name2!="") {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "name2='" + name2 + "'";
            }
            if(formType!=null) {
                if(sql.indexOf("=")!=-1)
                    sql += " and ";
                sql += "formType='" + formType + "'";
            }
            if(sql.indexOf("=")==-1)
                response.sendRedirect(request.getContextPath() + "/admin/Query.jsp?status=1");   //1代表所有项均为空
            rs = st.executeQuery(sql);
            while(rs.next()) {
                fb = new FormBean();
                fb.setName(rs.getString("name"));
                fb.setManufacturer(rs.getString("manufacturer"));
                fb.setType(rs.getString("type"));
                fb.setSpec(rs.getString("spec"));
                fb.setNumber(rs.getInt("number"));
                fb.setDate(rs.getString("date"));
                fb.setTime(rs.getString("time"));
                fb.setName1(rs.getString("name1"));
                fb.setName2(rs.getString("name2"));
                fb.setFormType(rs.getString("formType"));
                list.add(fb);
            }
            DBUtil.close(st, conn);
            session.setAttribute("list",list);
            if(list.size()==0)
                response.sendRedirect(request.getContextPath() + "/admin/Query.jsp?status=2");   //2代表不存在该信息
            else
                response.sendRedirect(request.getContextPath() + "/admin/Query.jsp?status=3");   //3代表查询到信息
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

DBUtil.java:

package util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DBUtil {
    public static String DBDRIVER = "com.mysql.cj.jdbc.Driver";
    public static String DBURL = "jdbc:mysql://localhost/test" +  "?serverTimezone=GMT%2B8";
    public static String DBUSER = "root";
    public static String DBPASSWORD = "WJL.991018";
    public static Connection getConn() {
        Connection conn = null;
        try {
            Class.forName(DBDRIVER);
            conn = DriverManager.getConnection(DBURL, DBUSER, DBPASSWORD);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return conn;
    }
    public static void close(Statement state, Connection conn) {
        try {
            if(state!=null)
                state.close();
            if(conn!=null) 
                conn.close();
        } catch (SQLException e) {
                e.printStackTrace();
        }
    }
    public static void close(ResultSet rs, Statement state, Connection conn) {
        try {
            if(rs!=null)
                rs.close();
            if(state!=null)
                state.close();
            if(conn!=null) 
                conn.close();
        } catch (SQLException e) {
                e.printStackTrace();
        }
    }
}

HomePage.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>
<html>
<head>
<meta charset="UTF-8">
<title>主页面</title>
</head>
<body>
<ul class="topmenu">
    <li><a href="Insert.jsp" target="iframe_a">商品出(入)库登记</a></li>
    <li><a href="Query.jsp" target="iframe_a">删除/修改/查询出(入)库单据</a></li>
    <li><a href="Insert2.jsp" target="iframe_a">增加商品</a></li>
    <li><a href="Query2.jsp" target="iframe_a">删除/修改/查询商品信息</a></li>
    <li><a href="ShowAll.jsp" target="iframe_a">显示全部信息</a></li>
</ul>
<iframe src="" width="1800" height="1000" name="iframe_a" frameborder="0" id="iframe_a">
  <p>该浏览器不支持iframe标签，请更换浏览器。</p>
</iframe>
</body>
<style type="text/css">
html {
    font-size:large;
    font-weight:600;
    width:1000px;
    overflow-x:auto;
}
body {
    margin:0;
    background-color: #C6E2FE;
}
.topmenu {
    list-style-type: none;
    height:40px;
    width:100%;
    margin: 0;
    padding: 0;
    background-color: #777;
    position: absolute;
    top:0px;
}
.topmenu li {
    float: left;
}
.topmenu li a {
    border-color:#777;
    color: white;
    padding: 8px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
}
.topmenu li a:hover {
    background-color: #222;
}
.topmenu li a:active {
    color: white;
    background-color: #4CAF50;
}
#iframe_a{
    position: absolute;
    top:50px;
}
#iframe_b{
    position: absolute;
    left:1100px;
    top:50px;
}
</style>
</html>

Insert.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>
<html>
<head>
<meta charset="UTF-8">
<title>商品出(入)库登记</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/servlet/FormDao?method=insert" method="post" id="insert">
<table border='1'>
<tr align='center'>
    <td colspan='2'><h2>商品出(入)库登记</h2></td>
</tr>
<tr align='center'>
    <td>商品名称</td>
    <td><input name="name" type="text" placeholder="商品名称"/></td>
</tr>
<tr align='center'>
    <td>生产厂家</td>
    <td><input name="manufacturer" type="text" placeholder="生产厂家"/></td>
</tr>
<tr align='center'>
    <td>型号</td>
    <td><input name="type" type="text" placeholder="型号"/></td>
</tr>
<tr align='center'>
    <td>规格</td>
    <td><input name="spec" type="text" placeholder="规格"/></td>
</tr>
<tr align='center'>
    <td>数量</td>
    <td><input name="number" type="text" placeholder="数量，必须为整数！"/></td>
</tr>
<tr align='center'>
    <td>日期</td>
    <td><input name="date" type="text" placeholder="日期，格式：1970/01/01"/></td>
</tr>
<tr align='center'>
    <td>时间</td>
    <td><input name="time" type="text" placeholder="时间，格式：12：00"/></td>
</tr>
<tr align='center'>
    <td>出（入）库单位名称</td>
    <td><input name="name1" type="text" placeholder="出（入）库单位名称"/></td>
</tr>
<tr align='center'>
    <td>取（送）货人姓名</td>
    <td><input name="name2" type="text" placeholder="取（送）货人姓名"/></td>
</tr>
<tr align='center'>
    <td>表单类型</td>
    <td><input type="radio" name="formType" value="入库"/>入库<br/>
        <input type="radio" name="formType" value="出库"/>出库</td>
</tr>
<tr align='center'>
    <td colspan='2'><input type="submit" value="保存" /></td>
</tr>
</table>
    <c:if test="${param.status.equals('0')}">
    <br/><br/><br/>
        <div>所有项信息均不能为空，请重新填写！</div>
    </c:if>
    <c:if test="${param.status.equals('1')}">
    <br/><br/><br/>
        <div>数量非整数，请重新填写！</div>
    </c:if>
    <c:if test="${param.status.equals('2')}">
    <br/><br/><br/>
        <div>商品出（入）库表单录入成功！</div>
    </c:if>
</form>
</body>
</html>

Insert2.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>
<html>
<head>
<meta charset="UTF-8">
<title>增加商品</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/servlet/GoodDao?method=insert" method="post" id="insert">
<table border='1'>
<tr align='center'>
    <td colspan='2'><h2>增加商品</h2></td>
</tr>
<tr align='center'>
    <td>商品名称</td>
    <td><input name="name" type="text" placeholder="商品名称"/></td>
</tr>
<tr align='center'>
    <td>生产厂家</td>
    <td><input name="manufacturer" type="text" placeholder="生产厂家"/></td>
</tr>
<tr align='center'>
    <td>型号</td>
    <td><input name="type" type="text" placeholder="型号"/></td>
</tr>
<tr align='center'>
    <td>规格</td>
    <td><input name="spec" type="text" placeholder="规格"/></td>
</tr>
<tr align='center'>
    <td colspan='2'><input type="submit" value="保存" /></td>
</tr>
</table>
    <c:if test="${param.status.equals('0')}">
    <br/><br/><br/>
        <div>所有项信息均不能为空，请重新填写！</div>
    </c:if>
    <c:if test="${param.status.equals('1')}">
    <br/><br/><br/>
        <div>商品增加成功！</div>
    </c:if>
    <c:if test="${param.status.equals('2')}">
    <br/><br/><br/>
        <div>该商品信息已存在，无需添加！</div>
    </c:if>
</form>
</body>
</html>

Query.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page import="util.*,java.sql.*,java.util.*,bean.FormBean" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>查询/删除出(入)库单据</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/servlet/FormDao?method=query" method="post" id="query">
<table border='1'>
<tr align='center'>
    <td colspan='2'><h2>查询/删除出(入)库单据</h2></td>
</tr>
<tr align='center'>
    <td>商品名称</td>
    <td><input name="name" type="text" placeholder="商品名称"/></td>
</tr>
<tr align='center'>
    <td>生产厂家</td>
    <td><input name="manufacturer" type="text" placeholder="生产厂家"/></td>
</tr>
<tr align='center'>
    <td>型号</td>
    <td><input name="type" type="text" placeholder="型号"/></td>
</tr>
<tr align='center'>
    <td>规格</td>
    <td><input name="spec" type="text" placeholder="规格"/></td>
</tr>
<tr align='center'>
    <td>数量</td>
    <td><input name="number" type="text" placeholder="数量，必须为整数！"/></td>
</tr>
<tr align='center'>
    <td>日期</td>
    <td><input name="date" type="text" placeholder="日期，格式：1970/01/01"/></td>
</tr>
<tr align='center'>
    <td>时间</td>
    <td><input name="time" type="text" placeholder="时间，格式：12：00"/></td>
</tr>
<tr align='center'>
    <td>出（入）库单位名称</td>
    <td><input name="name1" type="text" placeholder="出（入）库单位名称"/></td>
</tr>
<tr align='center'>
    <td>取（送）货人姓名</td>
    <td><input name="name2" type="text" placeholder="取（送）货人姓名"/></td>
</tr>
<tr align='center'>
    <td>表单类型</td>
    <td><input type="radio" name="formType" value="入库"/>入库<br/>
        <input type="radio" name="formType" value="出库"/>出库</td>
</tr>
<tr align='center'>
    <td colspan='2'><input type="submit" value="查询" /></td>
</tr>
</table>
    <c:if test="${param.status.equals('0')}">
    <br/><br/><br/>
        <div>数量非整数，请重新填写！</div>
    </c:if>
    <c:if test="${param.status.equals('1')}">
    <br/><br/><br/>
        <div>请填写信息！</div>
    </c:if>
    <c:if test="${param.status.equals('2')}">
    <br/><br/><br/>
        <div>未找到出入库单据信息！</div>
    </c:if>
    <c:if test="${param.status.equals('3')}">
    <br/><br/><br/>
<table border='1'>
    <tr>
    <td>商品名称</td>
    <td>生产厂家</td>
    <td>型号</td>
    <td>规格</td>
    <td>数量</td>
    <td>日期</td>
    <td>时间</td>
    <td>入（出）库单位名称</td>
    <td>送（取）货人姓名</td>
    <td>表单类型</td>
    <td>操作</td>
    </tr>
    <%List<FormBean> l = (List<FormBean>)session.getAttribute("list");
    session.setAttribute("l",l);
    for(int i=0;i<l.size();i++){%>
    <tr>
    <td><%=l.get(i).getName()%></td>
    <td><%=l.get(i).getManufacturer()%></td>
    <td><%=l.get(i).getType()%></td>
    <td><%=l.get(i).getSpec()%></td>
    <td><%=l.get(i).getNumber()%></td>
    <td><%=l.get(i).getDate()%></td>
    <td><%=l.get(i).getTime()%></td>
    <td><%=l.get(i).getName1()%></td>
    <td><%=l.get(i).getName2()%></td>
    <td><%=l.get(i).getFormType()%></td>
    <td><a href="${pageContext.request.contextPath}/servlet/FormDao?method=delete&i=<%=i%>">删除</a></td>
    <%}%>
    </tr>
</table>
</c:if>
    <c:if test="${param.status.equals('4')}">
    <br/><br/><br/>
        <div>删除成功！</div>
    </c:if>
</form>
</body>
</html>

Query2.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page import="util.*,java.sql.*,java.util.*,bean.GoodBean" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>查询/删除商品信息</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/servlet/GoodDao?method=query" method="post" id="query">
<table border='1'>
<tr align='center'>
    <td colspan='2'><h2>查询/删除商品信息</h2></td>
</tr>
<tr align='center'>
    <td>商品名称</td>
    <td><input name="name" type="text" placeholder="商品名称"/></td>
</tr>
<tr align='center'>
    <td>生产厂家</td>
    <td><input name="manufacturer" type="text" placeholder="生产厂家"/></td>
</tr>
<tr align='center'>
    <td>型号</td>
    <td><input name="type" type="text" placeholder="型号"/></td>
</tr>
<tr align='center'>
    <td>规格</td>
    <td><input name="spec" type="text" placeholder="规格"/></td>
</tr>
<tr align='center'>
    <td colspan='2'><input type="submit" value="查询" /></td>
</tr>
</table>
    <c:if test="${param.status.equals('0')}">
    <br/><br/><br/>
        <div>请填写信息！</div>
    </c:if>
    <c:if test="${param.status.equals('1')}">
    <br/><br/><br/>
        <div>未找到商品信息！</div>
    </c:if>
    <c:if test="${param.status.equals('2')}">
    <br/><br/><br/>
<table border='1'>
    <tr>
    <td>商品名称</td>
    <td>生产厂家</td>
    <td>型号</td>
    <td>规格</td>
    <td>操作</td>
    </tr>
    <%List<GoodBean> l = (List<GoodBean>)session.getAttribute("list");
    session.setAttribute("l",l);
    for(int i=0;i<l.size();i++){%>
    <tr>
    <td><%=l.get(i).getName()%></td>
    <td><%=l.get(i).getManufacturer()%></td>
    <td><%=l.get(i).getType()%></td>
    <td><%=l.get(i).getSpec()%></td>
    <td><a href="${pageContext.request.contextPath}/servlet/GoodDao?method=delete&i=<%=i%>">删除</a></td>
    <%}%>
    </tr>
</table>
</c:if>
    <c:if test="${param.status.equals('3')}">
    <br/><br/><br/>
        <div>删除成功！</div>
    </c:if>
</form>
</body>
</html>

ShowAll.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="util.*,java.sql.*" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>显示全部课程</title>
</head>
<body>
<%
    Connection conn = DBUtil.getConn();
    Statement st = conn.createStatement();
    ResultSet rs = st.executeQuery("select * from good");
%>
<table border=1>
    <tr>
    <td>商品名称</td>
    <td>生产厂家</td>
    <td>型号</td>
    <td>规格</td>
    </tr>
    <%while(rs.next()) {%>
    <tr>
    <td><%=rs.getString("name")%></td>
    <td><%=rs.getString("manufacturer")%></td>
    <td><%=rs.getString("type")%></td>
    <td><%=rs.getString("spec")%></td>
    </tr>
    <%}%>
</table> <br><br>
<% rs = st.executeQuery("select * from form"); %>
<table border=1>
<tr>
<td>商品名称</td>
    <td>生产厂家</td>
    <td>型号</td>
    <td>规格</td>
    <td>数量</td>
    <td>日期</td>
    <td>时间</td>
    <td>入（出）库单位名称</td>
    <td>送（取）货人姓名</td>
    <td>表单类型</td>
</tr>
<%while(rs.next()) {%>
    <tr>
    <td><%=rs.getString("name")%></td>
    <td><%=rs.getString("manufacturer")%></td>
    <td><%=rs.getString("type")%></td>
    <td><%=rs.getString("spec")%></td>
    <td><%=rs.getInt("number")%></td>
    <td><%=rs.getString("date")%></td>
    <td><%=rs.getString("time")%></td>
    <td><%=rs.getString("name1")%></td>
    <td><%=rs.getString("name2")%></td>
    <td><%=rs.getString("formType")%></td>
    </tr>
    <%}%>
</table>
<% DBUtil.close(rs, st, conn); %>
</body>
</html>

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0">
  <display-name>InventoryManage</display-name>
  <servlet>
    <servlet-name>FormDao</servlet-name>
    <servlet-class>dao.FormDao</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>FormDao</servlet-name>
    <url-pattern>/servlet/FormDao</url-pattern>
  </servlet-mapping>
  <servlet>
    <servlet-name>GoodDao</servlet-name>
    <servlet-class>dao.GoodDao</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>GoodDao</servlet-name>
    <url-pattern>/servlet/GoodDao</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>