库存物资管理系统代码，详细过程和总结

其他 2018-12-14 00:08:02 阅读次数: 0
库存物资管理系统实验要求如下：
1.背景资料
1、有一个存放商品的仓库，每天都有商品出库和入库。
2、每种商品都有名称、生产厂家、型号、规格等。
3、出入库时必须填写出入库单据，单据包括商品名称、生产厂家、型号、
规格、数量、日期、时间、入库单位（或出库单位）名称、送货（或提货）人
姓名。
2.系统要求与功能设计
2.1页面要求
（1）能够在Tomcat服务器中正确部署，并通过浏览器查看；（1分）
（2）网站页面整体风格统一；
2.2设计要求
1、设计出入库单据的录入。
2、实现按商品名称、出入库日期的查询。
 3.评分标准：
1、A类：完全实现上述功能，达到A类标准的同学可以免于参加期末上机考试，
期末上机考试成绩按满分计算。
2、B类：实现出入库单据记录的添加。
3、C类：实现数据库的连接。
4、D类：不满足上述要求的。
 

详细过程：1.刚拿到题目，觉得貌似比上次的简单，因为看题目要求的篇幅并不多，但看完题后，思考编写的过程发现并不简单，题目能给的关键信息点太少；

2.首先编写必要的jsp界面，自己懒得写，是课前在网上见过的类似界面代码修改而成的，想省下点时间写关键的方法代码；

3.商品信息的录入和查询通过上次实验的学习已经基本掌握了，但是也费了半天时间弄，主要是不太熟悉，有些东西也是修改代码完成的；

4.接下来就是最头疼的那个出库，有点懵，我一开始想是不是还用考虑往外取物资的系统，瞎编了半天没结果，马上就快下机了，然后听说是没那么复杂，就是相当于上次学生管理系统的修改步骤，想着A标已经无妄了，就回宿舍参考了上次的那个系统又改了快一个多小时，终于磕磕巴巴的做出了个粗糙的程序。

总结：上次靠学长的代码完完全全的实现了功能，觉得下一次做系统应该差不多了，没想到只是按照人家的思路可以做下来，自己做一个新的系统，一些类似的死的东西道是没问题，出了个出库就直接懵了，还是缺乏自己的独立思考，不过这次就是同学提醒了一下思路就自己完成了，还算有进步了，时间花费比较多，以后要加快速度。

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
    .a{
        margin-top: 20px;
    }
    .b{
        font-size: 20px;
        width: 160px;
        color: white;
        background-color: greenyellow;
    }
</style>
</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: red;">商品入库</h1>
        <a href="index.jsp">返回主页</a>
        <form action="UserServlet?method=add" method="post" onsubmit="return check()">
            <div class="a">
                分类名<input type="text" name="name" />
            </div>
            <div class="a">    
                                厂家<input type="text" name="changjia" />
            </div>
            <div class="a">
                型号<input type="text" name="xinghao"/>
            </div>
            <div class="a">
                规格<input type="text" name="guige"/>
            </div>
            <div class="a">
                数量<input type="text" name="shuliang" />
            </div>
            <div class="a">
                日期<input type="text" name="riqi" />
            </div>
            <div class="a">
                单位名称<input type="text" name="danwei" />
            </div>
            <div class="a">
                人名<input type="text" name="xingming"/>
            </div>
            <div class="a">
                操作<input type="text" name="caozuo"/>
            </div>
            <div class="a">
                <input type="submit" value="添加" onClick="delcfm1()" />
            </div>
        </form>
    </div>
     <script language="javascript"> 
    function delcfm1() { 
        if (!confirm("确认要添加？")) { 
            window.event.returnValue = false; 
        } 
    } 
   </script>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
    .a{
        margin-top: 20px;
    }
    .b{
        font-size: 20px;
        width: 160px;
        color: white;
        background-color: greenyellow;
    }
</style>
</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: red;">删除</h1>
        <a href="index.jsp">返回主页</a>
        <form action="UserServlet?method=getuserbyname" method="post" onsubmit="return check()">
            <div class="a">
                商品名称<input type="text" name="name" />
            </div>
            <div class="a">
                <button type="submit" class="b">查&nbsp;&nbsp;&nbsp;找</button>
            </div>
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            var name = document.getElementByName("name");;
            
            //非空
            if(name.value == '') {
                alert('商品名称为空');
                name.focus();
                return false;
            }
        }
    </script>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta 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: red;"></h1>
        <a href="index.jsp">返回主页</a>
        <table class="tb">
            <tr>
                <td>商品名称</td>
                <td>${user.name}</td>
            </tr>
            <tr>
                <td>商品厂家</td>
                <td>${user.changjia}</td>
            </tr>
            <tr>
                <td>商品型号</td>
                <td>${user.xinghao}</td>
            </tr>
                        <tr>
                <td>商品规格</td>
                <td>${user.guige}</td>
            </tr>            
                        <tr>
                <td>商品数量</td>
                <td>${user.shuliang}</td>
            </tr>            
                        <tr>
                <td>日期</td>
                <td>${user.riqi}</td>
            </tr>            
                        <tr>
                <td>单位</td>
                <td>${user.danwei}</td>
            </tr>
                        <tr>
                <td>姓名</td>
                <td>${user.xingming}</td>
            </tr>            
            <tr>
                <td>操作</td>
                <td>${user.caozuo}</td>
            </tr>        
        </table>
        <div class="a">
            <a onclick="return check()" href="UserServlet?method=del&name=${user.name}">删&nbsp;&nbsp;&nbsp;除</a>
        </div>
    </div>
    <script type="text/javascript">
        function check() {
            if (confirm("真的要删除吗？")){
                return true;
            }else{
                return false;
            }
        }
    </script>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>首页</title>
<style>
    .a{
        font-size: 26px;
        margin-top: 20px;
    }
</style>
</head>
<body>
    <div align="center">
        <h1 style="color: red;">库存物资管理</h1>
        <div class="a">
            <a href="add.jsp">商品出入库</a>
        </div>
        <div class="a">
            <a href="del.jsp">商品的删除</a>
        </div>
        <div class="a">
            <a href="search.jsp">查询</a>
        </div>
    </div>
</body>
</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>
<html>
<head>
<meta 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>
    <%
         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: red;">商品信息列表</h1>
        <a href="index.jsp">返回主页</a>
            <form action="UserServlet?method=getuserbyname" method="post" onsubmit="return check()">
            <div class="a">
                商品名称<input type="text" name="name" />
            </div>
            <div class="a">
                <button type="submit" class="b">查&nbsp;&nbsp;&nbsp;找</button>
            </div>
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            var name = document.getElementById("name");;
            
            //非空
            if(name.value == '') {
                alert('商品名称为空');
                name.focus();
                return false;
            }
        }
    </script>
</body>
</html>
package com.jaovo.msg.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.jaovo.msg.model.User;
import com.jaovo.msg.Util.DBUtil;
public class Dao {

    public boolean add(User user) {
        String sql = "insert into user( name, changjia,xinghao,guige,shuliang,riqi,danwei,xingming,caozuo) values('" + user.getName() + "','" + user.getChangjia() + "','" + user.getXinghao() + "','" + user.getGuige() + "','" + user.getShuliang() + "','" + user.getRiqi() +"','" + user.getDanwei() +"','" + user.getXingming()  +"','" + user.getCaozuo()+"')";
        Connection conn = DBUtil.getConn();
        Statement state = null;
        boolean f = false;
        int a = 0;
        try {
            state = conn.createStatement();
            state.executeUpdate(sql);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(state, conn);
        }
        
        if (a > 0) {
            f = true;
        }
        return f;
    }

    public boolean delete (String name) {
        boolean f = false;
        String sql = "delete from user where name='" + name + "'";
        Connection conn = DBUtil.getConn();
        Statement state = null;
        int a = 0;
        try {
            state = conn.createStatement();
            a = state.executeUpdate(sql);
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(state, conn);
        }
        
        if (a > 0) {
            f = true;
        }
        return f;
    }

    public boolean update(User user) {
        String sql = "update user set guige='"+user.getGuige()+ "', changjia='" + user.getChangjia() + "', xinghao='" + user.getXinghao()+ "', shuliang='" + user.getShuliang() +"', riqi='" + user.getRiqi() +"', danwei='" + user.getDanwei()+"', xingming='" + user.getXingming()  +"', caozuo='" + user.getCaozuo() +"'where name='" + user.getName() + "'";
        Connection conn = DBUtil.getConn();
        Statement state = null;
        boolean f = false;
        int a = 0;

        try {
            state = conn.createStatement();
            a = state.executeUpdate(sql);
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(state, conn);
        }
        
        if (a > 0) {
            f = true;
        }
        return f;
    }

    public boolean name(String name) {
        boolean flag = false;
        String sql = "select name from user where name = '" + name + "'";
        Connection conn = DBUtil.getConn();
        Statement state = null;
        ResultSet rs = null;
        
        try {
            state = conn.createStatement();
            rs = state.executeQuery(sql);
            while (rs.next()) {
                flag = true;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(rs, state, conn);
        }
        return flag;
    }
    
    public User getUserByName(String name) {
        String sql = "select * from user where name ='" + name + "'";
        Connection conn = DBUtil.getConn();
        Statement state = null;
        ResultSet rs = null;
        User user= null;
        
        try {
            state = conn.createStatement();
            rs = state.executeQuery(sql);
            while (rs.next()) {
                String name1 = rs.getString("name");
                String changjia= rs.getString("changjia");
                String xinghao= rs.getString("xinghao");
                String guige =rs.getString("guige");
                String shuliang=rs.getString("shuliang");
                String riqi=rs.getString("riqi");
                String danwei=rs.getString("danwei");
                 String xingming=rs.getString("xingming");
                 String caozuo=rs.getString("caozuo");
                user = new User(name1,changjia,xinghao,guige,shuliang,riqi,danwei,xingming,caozuo);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(rs, state, conn);
        }
        
        return user;
    }
    
    public List<User> search(String name,String changjia,String xinghao,String guige,String shuliang,String riqi,String danwei,String xingming ) {
        String sql = "select * from user where ";
        if (name != "") {
            sql += "name like '%" + name + "%'";
        }
        if (changjia!= "") {
            sql += "changjia like '%" + changjia + "%'";
        }
        if (xinghao != "") {
            sql += "xinghao like '%" + xinghao+ "%'";
        }
        if (guige != "") {
            sql += "guige like '%" + guige+ "%'";
        }
        if (shuliang != "") {
            sql += "shuliang like '%" + shuliang + "%'";
        }
        if (riqi != "") {
            sql += "riqi like '%" + riqi + "%'";
        }
        if (danwei != "") {
            sql += "danwei like '%" + danwei+ "%'";
        }
        if (xingming != "") {
            sql += "xingming like '%" + xingming + "%'";
        }
        List<User> list = new ArrayList<>();
        Connection conn = DBUtil.getConn();
        Statement state = null;
        ResultSet rs = null;

        try {
            state = conn.createStatement();
            rs = state.executeQuery(sql);
            User bean = null;
            while (rs.next()) {
                String name1 = rs.getString("name");
                String changjia1= rs.getString("changjia");
                String xinghao1= rs.getString("xinghao");
                String guige1 =rs.getString("guige");
                String shuliang1=rs.getString("shuliang");
                String riqi1=rs.getString("riqi");
                String danwei1=rs.getString("danwei");
                 String xingming1=rs.getString("xingming");
                 String caozuo=rs.getString("caozuo");
                bean = new User(name1,changjia1,xinghao1,guige1,shuliang1,riqi1,danwei1,xingming1,caozuo);
                list.add(bean);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(rs, state, conn);
        }
        
        return list;
    }

    public List<User> list() {
        String sql = "select * from user";
        List<User> list = new ArrayList<>();
        Connection conn = DBUtil.getConn();
        Statement state = null;
        ResultSet rs = null;

        try {
            state = conn.createStatement();
            rs = state.executeQuery(sql);
            User bean = null;
            while (rs.next()) {
                String name = rs.getString("name");
                String changjia= rs.getString("changjia");
                String xinghao= rs.getString("xinghao");
                String guige =rs.getString("guige");
                String shuliang=rs.getString("shuliang");
                String riqi=rs.getString("riqi");
                String danwei=rs.getString("danwei");
                String xingming=rs.getString("xingming");
                 String caozuo=rs.getString("caozuo");
                bean= new User(name,changjia,xinghao,guige,shuliang,riqi,danwei,xingming,caozuo);
                list.add(bean);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(rs, state, conn);
        }
        
        return list;
    }


}
package com.jaovo.msg.model;
import java.sql.Connection;
public class User {
    private String name;
    private String changjia;
    private String xinghao;
    private String guige;
    private String shuliang;
    private String riqi;
    private String danwei;
    private String xingming;
    private String caozuo;
    public void setName(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }
    public String getChangjia() {
        return changjia;
    }
    public void setChangjia(String changjia) {
        this.changjia = changjia;
    }
    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 getShuliang() {
        return shuliang;
    }
    public void setShuliang(String shuliang) {
        this.shuliang = shuliang;
    }
    public String getRiqi() {
        return riqi;
    }
    public void setRiqi(String riqi) {
        this.riqi = riqi;
    }
    public String getDanwei() {
        return danwei;
    }
    public void setDanwei(String danwei) {
        this.danwei = danwei;
    }
    public String getXingming() {
        return xingming;
    }
    public void setXingming(String xingming) {
        this.xingming = xingming;
    }
    public User(String name,String changjia,String xinghao,String guige,String shuliang,String riqi,String danwei,String xingming ,String caozuo) {
        this.name = name;
        this.changjia = changjia;
        this.xinghao = xinghao;
        this.guige = guige;
        this.shuliang = shuliang;
        this.riqi = riqi;
        this.danwei = danwei;
        this.xingming = xingming;
        this.setCaozuo(caozuo);
    }
    public User() {
        // TODO Auto-generated constructor stub
    }
    public String getCaozuo() {
        return caozuo;
    }
    public void setCaozuo(String caozuo) {
        this.caozuo = caozuo;
    }
    
}
package com.jaovo.msg.service;
import java.util.List;
import com.jaovo.msg.dao.Dao;
import com.jaovo.msg.model.User;
public class UserService {
    Dao cDao = new Dao();
    public boolean add(User user) {
        boolean f = false;
        if(!cDao.name(user.getName())) {
            cDao.add(user);
            f = true;
        }
        return f;
    }
    public void del(String  name) {
        cDao.delete(name);
    }
    public void update(User user) {
        cDao.update(user);
    }
    public User getUserByName(String name) {
        return cDao.getUserByName(name);
    }

    public List<User> search(String name ) {
        return (List<User>) cDao.getUserByName(name);
    }
    public List<User> list() {
        return cDao.list();
    }
}
package com.jaovo.msg.severlet;
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.jaovo.msg.model.User;
import com.jaovo.msg.service.UserService;
@WebServlet("/UserServlet")
public class UserServlet extends HttpServlet {
    
    private static final long serialVersionUID = 1L;

    UserService service = new UserService();
    
    /**
     * 鏂规硶閫夋嫨
     */
    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 ("getuserbyname".equals(method)) {
            getUserByName(req, resp);
        } else if ("list".equals(method)) {
            list(req, resp);
        }
    }

    /**
     * 娣诲姞
     * @param <service>
     * @param req
     * @param resp
     * @throws IOException 
     * @throws ServletException 
     */
    private <service> void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        String changjia= req.getParameter("changjia");
        String xinghao=req.getParameter("xinghao");
        String guige =req.getParameter("guige");
        String shuliang=req.getParameter("shuliang");
        String riqi=req.getParameter("riqi");
        String danwei=req.getParameter("danwei");
        String xingming=req.getParameter("xingming");
        String caozuo=req.getParameter("caozuo");
        User user = new User(name,changjia,xinghao,guige,shuliang,riqi,danwei,xingming,caozuo);
        
        //娣诲姞鍚庢秷鎭樉绀�
        if(service.add(user)) {
            req.setAttribute("message", "娣诲姞鎴愬姛");
            req.getRequestDispatcher("add.jsp").forward(req,resp);
        } else {
            req.setAttribute("message", "鍟嗗搧鍚嶇О閲嶅锛岃閲嶆柊褰曞叆");
            req.getRequestDispatcher("add.jsp").forward(req,resp);
        }
    }
    
    /**
     * 鍏ㄩ儴
     * @param req
     * @param resp
     * @throws ServletException 
     */
    private void list(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        List<User> users = service.list();
        req.setAttribute("users", users);
        req.getRequestDispatcher("list.jsp").forward(req,resp);
    }

    /**
     * 閫氳繃鍚嶅瓧鏌ユ壘
     * 璺宠浆鑷冲垹闄�
     * @param req
     * @param resp
     * @throws IOException
     * @throws ServletException 
     */
    private void getUserByName(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        User user = service.getUserByName(name);
        if(user == null) {
            req.setAttribute("message", "鏌ユ棤姝ゅ晢鍝侊紒");
            req.getRequestDispatcher("del.jsp").forward(req,resp);
        } else {
            req.setAttribute("user", user);
            req.getRequestDispatcher("detail.jsp").forward(req,resp);
        }
    }
    /**
     * 鍒犻櫎
     * @param req
     * @param resp
     * @throws IOException
     * @throws ServletException 
     */
    private void del(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        service.del(name);
        req.setAttribute("message", "鍒犻櫎鎴愬姛锛�");
        req.getRequestDispatcher("del.jsp").forward(req,resp);
    }
    
    /**
     * 淇敼
     * @param req
     * @param resp
     * @throws IOException
     * @throws ServletException 
     */
    private void update(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        String changjia= req.getParameter("changjia");
        String xinghao=req.getParameter("xinghao");
        String guige =req.getParameter("guige");
        String shuliang=req.getParameter("shuliang");
        String riqi=req.getParameter("riqi");
        String danwei=req.getParameter("danwei");
        String xingming=req.getParameter("xingming");
        String caozuo=req.getParameter("caozuo");
        User user = new User(name,changjia,xinghao,guige,shuliang,riqi,danwei,xingming,caozuo);
        service.update(user);
        req.setAttribute("message", "淇敼鎴愬姛");
        req.getRequestDispatcher("").forward(req,resp);
    }
    
    /**
     * 鏌ユ壘
     * @param req
     * @param resp
     * @throws ServletException 
     */
    private void search(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        String changjia= req.getParameter("changjia");
        String xinghao= req.getParameter("xinghao");
        String guige =req.getParameter("guige");
        String shuliang=req.getParameter("shuliang");
        String riqi=req.getParameter("riqi");
        String danwei=req.getParameter("danwei");
        String xingming=req.getParameter("xingming");
        List<User> users = service.search(name);
        req.setAttribute("users", users);
        req.getRequestDispatcher("searchlist.jsp").forward(req,resp);
    }
}
package com.jaovo.msg.Util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

/**
 * 鏁版嵁搴撹繛鎺ュ伐鍏�
 * @author Hu
 *
 */
public class DBUtil {
    
    public static String db_url = "jdbc:mysql://localhost:3306/runoob?useUnicode=true&characterEncoding=utf-8";
    public static String db_user = "root";
    public static String db_pass = "root";
    
    public static Connection getConn () {
        Connection conn = null;
        
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");//鍔犺浇椹卞姩
            conn = DriverManager.getConnection(db_url, db_user, db_pass);
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return conn;
    }
    
    /**
     * 鍏抽棴杩炴帴
     * @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();
            }
        }
    }

}

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