zoukankan html css js c++ java

库存管理系统

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>库存商品管理系统</title>
 8 </head>
 9 <body>
10 <h2 align="center">库存商品管理系统</h2>
11 <div align="center">
12         
13         <div class="a">
14             <a href="add.jsp">商品信息添加</a>
15         </div>
16         <div class="a">
17             <a href="ProductServlet?method=list">商品信息修改</a>
18         </div>
19         <div class="a">
20             <a href="del.jsp">商品信息删除</a>
21         </div>
22         <div class="a">
23             <a href="search.jsp">商品信息查询</a>
24         </div>
25         
26     </div>
27 
28 </body>
29 </html>

主页面

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>添加物资页面</title>
 8 </head>
 9 <body>
10 <%
11          Object message = request.getAttribute("message");//放置一个字符串，并取出
12          if(message!=null && !"".equals(message)){
13      
14     %>
15          <script type="text/javascript">
16               alert("<%=request.getAttribute("message")%>");
17          </script>
18     <%} %>
19     <div align="center">
20         <h1 style="color: black;">商品信息录入</h1>
21         <a href="index.jsp">返回主页</a>
22         <form action="ProductServlet?method=add" method="post" onsubmit="return check()">
23             <div class="a">
24                 商品名称<input type="text" id="spmc" name="spmc"/>
25             </div>
26             <div class="a">
27                 生产厂家<input type="text" id="sccj" name="sccj" />
28             </div>
29             <div class="a">
30                 型号<input type="text" id="xh" name="xh" />
31             </div>
32             <div class="a">
33                 规格<input type="text" id="gg" name="gg" />
34             </div>
35             <div class="a">
36                 <button type="submit" class="b">保&nbsp;&nbsp;&nbsp;存</button>
37             </div>
38         </form>
39     </div>
40     <script type="text/javascript">
41         function check() {
42             var spmc = document.getElementById("spmc");;
43             var sccj = document.getElementById("sccj");
44             var xh = document.getElementById("xh");
45             var gg = document.getElementById("gg");
46             //非空
47             if(spmc.value == '') {
48                 alert('商品名称不能为空');
49                 spmc.focus();
50                 return false;
51             }
52             if(sccj.value == '') {
53                 alert('生产厂家不能为空');
54                 sccj.focus();
55                 return false;
56             }
57             if(xh.value == 0) {
58                 alert('型号不能为空');
59                 xh.focus();
60                 return false;
61             }    
62             if(gg.value == '') {
63                 alert('规格不能为空');
64                 gg.focus();
65                 return false;
66             }
67         }
68     </script>
69 </body>
70 </html>

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 <%
11          Object message = request.getAttribute("message");
12          if(message!=null && !"".equals(message)){
13      
14     %>
15          <script type="text/javascript">
16               alert("<%=request.getAttribute("message")%>");
17          </script>
18     <%} %>
19     <div align="center">
20         <h1 style="color: black;">物资信息删除</h1>
21         <a href="index.jsp">返回主页</a>
22         <form action="ProductServlet?method=getproductbyname" method="post" onsubmit="return check()">
23             <div class="a">
24                 商品名称<input type="text" id="spmc" name="spmc"/>
25             </div>
26             <div class="a">
27                 <button type="submit" class="b">查&nbsp;&nbsp;&nbsp;找</button>
28             </div>
29         </form>
30     </div>
31     <script type="text/javascript">
32         function check() {
33             var spmc = document.getElementById("spmc");;
34             
35             //非空
36             if(spmc.value == '') {
37                 alert('商品名称不能为空');
38                 spmc.focus();
39                 return false;
40             }
41         }
42     </script>
43 </body>
44 </html>

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 <style>
 9     .a{
10         margin-top: 20px;
11     }
12     .b{
13         font-size: 20px;
14         width: 160px;
15         color: white;
16         background-color: greenyellow;
17     }
18     .tb, td {
19         border: 1px solid black;
20         font-size: 22px;
21     }
22 </style>
23 </head>
24 <body>
25 <div align="center">
26         <h1 style="color: black;">商品信息删除</h1>
27         <a href="index.jsp">返回主页</a>
28         <table class="tb">
29             <tr>
30                 <td>商品名称</td>
31                 <td>${product.spmc}</td>
32             </tr>
33             <tr>
34                 <td>生产厂家</td>
35                 <td>${product.sccj}</td>
36             </tr>
37             <tr>
38                 <td>型号</td>
39                 <td>${product.xh}</td>
40             </tr>
41             <tr>
42                 <td>规格</td>
43                 <td>${product.gg}</td>
44             </tr>
45         </table>
46         <div class="a">
47             <a onclick="return check()" href="ProductServlet?method=del&id=${product.id}">删&nbsp;&nbsp;&nbsp;除</a>
48         </div>
49     </div>
50     <script type="text/javascript">
51         function check() {
52             if (confirm("确定删除吗？")){
53                 return true;
54             }else{
55                 return false;
56             }
57         }
58     </script>
59 
60 </body>
61 </html>

<%@ 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>
<style>
    .a{
        margin-top: 20px;
    }
    .b{
        font-size: 20px;
        width: 160px;
        color: white;
        background-color: greenyellow;
    }
    .tb, td {
        border: 1px solid black;
        font-size: 22px;
    }
</style>
</head>
<body>
<div align="center">
        <h1 style="color: black;">商品信息删除</h1>
        <a href="index.jsp">返回主页</a>
        <table class="tb">
            <tr>
                <td>商品名称</td>
                <td>${product.spmc}</td>
            </tr>
            <tr>
                <td>生产厂家</td>
                <td>${product.sccj}</td>
            </tr>
            <tr>
                <td>型号</td>
                <td>${product.xh}</td>
            </tr>
            <tr>
                <td>规格</td>
                <td>${product.gg}</td>
            </tr>
        </table>
        <div class="a">
            <a onclick="return check()" href="ProductServlet?method=del&id=${product.id}">删&nbsp;&nbsp;&nbsp;除</a>
        </div>
    </div>
    <script type="text/javascript">
        function check() {
            if (confirm("确定删除吗？")){
                return true;
            }else{
                return false;
            }
        }
    </script>

</body>
</html>

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3     <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 5 <html>
 6 <head>
 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 8 <title>Insert title here</title>
 9 </head>
10 <body>
11 <%
12          Object message = request.getAttribute("message");
13          if(message!=null && !"".equals(message)){
14      
15     %>
16          <script type="text/javascript">
17               alert("<%=request.getAttribute("message")%>");
18          </script>
19     <%} %>
20     <div align="center">
21         <h1 style="color: black;">商品信息列表</h1>
22         <a href="index.jsp">返回主页</a>
23         <table class="tb">
24             <tr>
25                 <td>id</td>
26                 <td>商品名称</td>
27                 <td>生产厂家</td>
28                 <td>型号</td>
29                 <td>规格</td>
30                 <td align="center" colspan="2">操作</td>
31             </tr>
32             <c:forEach items="${products}" var="item">
33             
34                 <tr>
35                     <td>${item.id}</td>
36                     <td>${item.spmc}</td>
37                     <td>${item.sccj}</td>
38                     <td>${item.xh}</td>
39                     <td>${item.gg}</td>
40                     <td><a href="ProductServlet?method=getproductbyid&id=${item.id}">修改</a></td>
41                 </tr>
42             </c:forEach>
43         </table>
44     </div>
45 </body>
46 </html>

<%@ 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>
<%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
     
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: black;">商品信息列表</h1>
        <a href="index.jsp">返回主页</a>
        <table class="tb">
            <tr>
                <td>id</td>
                <td>商品名称</td>
                <td>生产厂家</td>
                <td>型号</td>
                <td>规格</td>
                <td align="center" colspan="2">操作</td>
            </tr>
            <c:forEach items="${products}" var="item">
            
                <tr>
                    <td>${item.id}</td>
                    <td>${item.spmc}</td>
                    <td>${item.sccj}</td>
                    <td>${item.xh}</td>
                    <td>${item.gg}</td>
                    <td><a href="ProductServlet?method=getproductbyid&id=${item.id}">修改</a></td>
                </tr>
            </c:forEach>
        </table>
    </div>
</body>
</html>

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3     <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 5 <html>
 6 <head>
 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 8 <title>Insert title here</title>
 9 </head>
10 <body>
11 <%
12          Object message = request.getAttribute("message");
13          if(message!=null && !"".equals(message)){
14      
15     %>
16          <script type="text/javascript">
17               alert("<%=request.getAttribute("message")%>");
18          </script>
19     <%} %>
20     <div align="center">
21         <h1 style="color: black;">商品信息列表</h1>
22         <a href="index.jsp">返回主页</a>
23         <table class="tb">
24             <tr>
25                 <td>id</td>
26                 <td>商品名称</td>
27                 <td>生产厂家</td>
28                 <td>型号</td>
29                 <td>规格</td>
30                 <td align="center" colspan="2">操作</td>
31             </tr>
32             <c:forEach items="${products}" var="item">
33             
34                 <tr>
35                     <td>${item.id}</td>
36                     <td>${item.spmc}</td>
37                     <td>${item.sccj}</td>
38                     <td>${item.xh}</td>
39                     <td>${item.gg}</td>
40                     <td><a href="ProductServlet?method=getproductbyid&id=${item.id}">修改</a></td>
41                 </tr>
42             </c:forEach>
43         </table>
44     </div>
45 </body>
46 </html>

package com.demo.DB;

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

public class DB {
    public static String db_url = "jdbc:mysql://localhost:3307/kucunguanli";
    public static String db_user = "root";
    public static String db_pass = "320775mxlxjbfl";
    
    public static Connection getConn () {
        Connection conn = null;
        
        try {
            Class.forName("com.mysql.jdbc.Driver");//加载驱动
            conn = DriverManager.getConnection(db_url, db_user, db_pass);
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return conn;
    }
    
    /**
     * 关闭连接
     * @param state
     * @param conn
     */
    public static 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 static 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();
            }
        }
    }


}

package com.demo.entity;

public class Product {
    int id;
    private String spmc;
    private String sccj;
    private String xh;
    private String gg;
    public String getspmc() {
        return spmc;
    }
    public void setspmc(String spmc) {
        this.spmc = spmc;
    }
    public String getsccj() {
        return sccj;
    }
    public void setsccj(String sccj) {
        this.sccj = sccj;
    }
    public String getxh() {
        return xh;
    }
    public void setxh(String xh) {
        this.xh = xh;
    }
    public String getgg() {
        return gg;
    }
    public void setgg(String gg) {
        this.gg = gg;
    }
    public void setId(int id) {
        this.id = id;
    }
    public int getId() {
        return id;
    }
    public Product(int id, String spmc, String sccj, String xh,String gg) {
        this.id = id;
        this.spmc = spmc;
        this.sccj = sccj;
        this.xh = xh;
        this.gg = gg;
    }
    
    public Product(String spmc, String  sccj, String xh,String gg) {
        this.spmc = spmc;
        this.sccj = sccj;
        this.xh = xh;
        this.gg = gg;
    }

}

package com.demo.servlet;

import java.io.IOException;
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.demo.Dao.ProductDao;
import com.demo.entity.Product;


/**
 * Servlet implementation class ProductServlet
 */
@WebServlet("/ProductServlet")
public class ProductServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
     ProductDao dao = new ProductDao();
        /**
         * @see HttpServlet#HttpServlet()
         */
        public ProductServlet() {
            super();
            // TODO Auto-generated constructor stub
        }
        protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
            req.setCharacterEncoding("utf-8");
            String method = req.getParameter("method");
            if ("add".equals(method)) {
                add(req, resp);
            } else if ("del".equals(method)) {
                del(req, resp);
            } else if ("update".equals(method)) {
                update(req, resp);
            } else if ("search".equals(method)) {
                search(req, resp);
            } else if ("getproductbyid".equals(method)) {
                getProductById(req, resp);
            } else if ("getproductbyname".equals(method)) {
                getProductByName(req, resp);
            } else if ("list".equals(method)) {
                list(req, resp);
            }
        }
        private void list(HttpServletRequest req, HttpServletResponse resp)throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            List<Product> products = dao.list();
            req.setAttribute("products", products);
            req.getRequestDispatcher("list.jsp").forward(req, resp);
            
            
        }
        private void getProductByName(HttpServletRequest req, HttpServletResponse resp)throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            String spmc = req.getParameter("spmc");
            Product product = dao.getProductByName(spmc);
            if(product == null) {
                req.setAttribute("message", "查无此商品！");
                req.getRequestDispatcher("del.jsp").forward(req,resp);
            } else {
                req.setAttribute("product",product);
                req.getRequestDispatcher("detail.jsp").forward(req,resp);
            }
            
        }
        private void getProductById(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            int id = Integer.parseInt(req.getParameter("id"));
            Product product = dao.getProductById(id);
            req.setAttribute("product", product);
            req.getRequestDispatcher("detail2.jsp").forward(req,resp);
            
        }
        private void search(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            String spmc = req.getParameter("spmc");
            String sccj = req.getParameter("sccj");
            String xh = req.getParameter("xh");
            String gg = req.getParameter("gg");
            
            List<Product> products = dao.search(spmc,sccj, xh,gg);
            if(products!=null) {
                req.setAttribute("products", products);
                req.getRequestDispatcher("searchlist.jsp").forward(req,resp);
            }
            else {
                req.setAttribute("message", "查无此商品信息！");
            }
            
        }
        private void update(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            int id = Integer.parseInt(req.getParameter("id"));
            String spmc = req.getParameter("spmc");
            String sccj = req.getParameter("sccj");
            String xh = req.getParameter("xh");
            String gg = req.getParameter("gg");
            Product product = new Product(id, spmc, sccj,xh,gg);
            
            dao.update(product);
            req.setAttribute("message", "修改成功");
            req.getRequestDispatcher("ProductServlet?method=list").forward(req,resp);
            
        }
        private void del(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            int id = Integer.parseInt(req.getParameter("id"));
            dao.delete(id);
            req.setAttribute("message", "删除成功！");
            req.getRequestDispatcher("del.jsp").forward(req,resp);
            
            
            
        }
        private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
            // TODO Auto-generated method stub
            String spmc = req.getParameter("spmc");
            String sccj = req.getParameter("sccj");
            String xh = req.getParameter("xh");
            String gg = req.getParameter("gg");
            Product product = new Product(spmc,sccj, xh,gg);
            if(dao.add(product)) {
                req.setAttribute("message", "添加成功!");
                req.getRequestDispatcher("add.jsp").forward(req, resp);
            }else {
                req.setAttribute("message", "添加失败!");
                req.getRequestDispatcher("add.jsp").forward(req, resp);
            }
        }


    }

package com.demo.servlet;

import java.io.IOException;
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.demo.Dao.ProductDao;
import com.demo.entity.Product;


/**
 * Servlet implementation class ProductServlet
 */
@WebServlet("/ProductServlet")
public class ProductServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
     ProductDao dao = new ProductDao();
        /**
         * @see HttpServlet#HttpServlet()
         */
        public ProductServlet() {
            super();
            // TODO Auto-generated constructor stub
        }
        protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
            req.setCharacterEncoding("utf-8");
            String method = req.getParameter("method");
            if ("add".equals(method)) {
                add(req, resp);
            } else if ("del".equals(method)) {
                del(req, resp);
            } else if ("update".equals(method)) {
                update(req, resp);
            } else if ("search".equals(method)) {
                search(req, resp);
            } else if ("getproductbyid".equals(method)) {
                getProductById(req, resp);
            } else if ("getproductbyname".equals(method)) {
                getProductByName(req, resp);
            } else if ("list".equals(method)) {
                list(req, resp);
            }
        }
        private void list(HttpServletRequest req, HttpServletResponse resp)throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            List<Product> products = dao.list();
            req.setAttribute("products", products);
            req.getRequestDispatcher("list.jsp").forward(req, resp);
            
            
        }
        private void getProductByName(HttpServletRequest req, HttpServletResponse resp)throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            String spmc = req.getParameter("spmc");
            Product product = dao.getProductByName(spmc);
            if(product == null) {
                req.setAttribute("message", "查无此商品！");
                req.getRequestDispatcher("del.jsp").forward(req,resp);
            } else {
                req.setAttribute("product",product);
                req.getRequestDispatcher("detail.jsp").forward(req,resp);
            }
            
        }
        private void getProductById(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            int id = Integer.parseInt(req.getParameter("id"));
            Product product = dao.getProductById(id);
            req.setAttribute("product", product);
            req.getRequestDispatcher("detail2.jsp").forward(req,resp);
            
        }
        private void search(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            String spmc = req.getParameter("spmc");
            String sccj = req.getParameter("sccj");
            String xh = req.getParameter("xh");
            String gg = req.getParameter("gg");
            
            List<Product> products = dao.search(spmc,sccj, xh,gg);
            if(products!=null) {
                req.setAttribute("products", products);
                req.getRequestDispatcher("searchlist.jsp").forward(req,resp);
            }
            else {
                req.setAttribute("message", "查无此商品信息！");
            }
            
        }
        private void update(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            int id = Integer.parseInt(req.getParameter("id"));
            String spmc = req.getParameter("spmc");
            String sccj = req.getParameter("sccj");
            String xh = req.getParameter("xh");
            String gg = req.getParameter("gg");
            Product product = new Product(id, spmc, sccj,xh,gg);
            
            dao.update(product);
            req.setAttribute("message", "修改成功");
            req.getRequestDispatcher("ProductServlet?method=list").forward(req,resp);
            
        }
        private void del(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
            // TODO Auto-generated method stub
            req.setCharacterEncoding("utf-8");
            int id = Integer.parseInt(req.getParameter("id"));
            dao.delete(id);
            req.setAttribute("message", "删除成功！");
            req.getRequestDispatcher("del.jsp").forward(req,resp);
            
            
            
        }
        private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
            // TODO Auto-generated method stub
            String spmc = req.getParameter("spmc");
            String sccj = req.getParameter("sccj");
            String xh = req.getParameter("xh");
            String gg = req.getParameter("gg");
            Product product = new Product(spmc,sccj, xh,gg);
            if(dao.add(product)) {
                req.setAttribute("message", "添加成功!");
                req.getRequestDispatcher("add.jsp").forward(req, resp);
            }else {
                req.setAttribute("message", "添加失败!");
                req.getRequestDispatcher("add.jsp").forward(req, resp);
            }
        }


    }

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原文地址：https://www.cnblogs.com/liuxiaojieqqq/p/10117626.html