圖書管理系統-添加管理員操作功能
一、操作系統
軟件環境
Operating System:Windows10
IDEA:2018.2
Java:jdk1.8
Mysql:8.0.13
Tomcat:8.5.23
本次更新添加了管理員的增刪改查,圖書管理員可以進行圖書的新增,修改,刪除,查詢。然後登錄部分添加了區分是普通用戶登錄還是管理登錄的功能。
下面是新增頁面之後的工程的截圖
二、系統展示
1.管理員主頁
2.管理員查詢圖書頁面
3.管理員圖書明細頁面
三、代碼實現
1.前端
admin.jsp
<%--
Created by IntelliJ IDEA.
User: shuijianshiqing
Date: 2020/5/24
Time: 10:50
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %>
<%@ page import="java.util.List" %>
<%@ page import="com.sjsq.po.Book" %>
<%@ page import="com.sjsq.service.impl.BookServiceImpl" %>
<%@ page import="com.sjsq.po.User" %>
<!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>查看圖書</title>
<style type="text/css">
h1{
text-align: center;
}
body{
background-color: antiquewhite;
}
#before{
text-align: center;
}
#head{
background: #eeeeee;height: 80px;
}
#headLink{
font-size: 20px;
}
#headWelLink{
font-size: 20px;
}
</style>
</head>
<body>
<%--頭部信息--%>
<%
User user =(User)session.getAttribute("user");
if(user == null){
response.sendRedirect("login.jsp");
}else {
%>
<div id="head">
<table width="100%">
<td id="headWelLink">歡迎您:<%=user.getName()%></td>
<td align="right" id="headLink">
<a href="logout.jsp">安全退出</a>
</td>
</table>
</div>
<%
}
%>
<%--圖書信息--%>
<%
// 設置獲取註冊時的編碼爲UTF-8
request.setCharacterEncoding("UTF-8");
Book book = new Book();
// 獲取上一個頁面傳過來的值
String boookname=request.getParameter("bookname");
book.setBookname(boookname);
BookServiceImpl service = new BookServiceImpl();
List<Book> list = service.select(book);
%>
<h1>圖書列表</h1>
<div id="before">
<form action="admin.jsp" method="post">
請輸入姓名:<input type="text" name="bookname" placeholder="輸入圖書名稱搜索">
<input type="submit" value="查詢" />
</form>
<a href="javascript: window.history.go(-1)">返回上一級</a>
</div>
<table align="center" cellpadding="10" cellspacing="10">
<tr bgcolor="green">
<td>編號</td>
<td>書名</td>
<td>價格</td>
<td>作者</td>
<td>封皮</td>
<td>出版社</td>
<td>操作圖書</td>
</tr>
<%
String bg = null;
for (int i = 0;i<list.size();i++){
Book b =list.get(i);
if(i%2 == 0){
bg = "pink";
}else{
bg = "yellow";
}
%>
<tr bgcolor="<%=bg%>">
<td><%=b.getBookid()%></td>
<td><a href="admin_do_info.jsp?bookid=<%=b.getBookid()%>"><%=b.getBookname()%></a></td>
<td><%=b.getPrice() %></td>
<td><%=b.getAuthor() %></td>
<td><%=b.getPicture() %></td>
<td><%=b.getPublish() %></td>
<td>
<a href="admin_update.jsp?bookid=<%=b.getBookid()%>">修改</a>
<a href="admin_delete.jsp?bookid=<%=b.getBookid()%>">刪除</a>
</td>
</tr>
<%
}
%>
</table>
<table align="center">
<tr>
<td><a href="admin_addbook.jsp">新增圖書</a></td>
</tr>
</table>
</body>
</html>
admin_addbook.jsp
<%@ page import="com.sjsq.po.User" %><%--
Created by IntelliJ IDEA.
User: shuijianshiqing
Date: 2020/5/21
Time: 23:14
To change this template use File | Settings | File Templates.
--%>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>新增圖書</title>
<style type="text/css">
h1{
text-align: center;
}
h4{
text-align: center;color: red;
}
body{
background-color: antiquewhite;
}
div{
text-align: center;
}
#before{
text-align: center;
}
#head{
background: #eeeeee;height: 80px;
}
#headLink{
font-size: 20px;
}
#headWelLink{
font-size: 20px;
}
</style>
</head>
<body>
<%--頭部信息--%>
<%
User user =(User)session.getAttribute("user");
if(user == null){
response.sendRedirect("login.jsp");
}else {
%>
<table width="100%" id="head">
<td id="headWelLink">歡迎您:<%=user.getName()%></td>
<td align="right" id="headLink">
<a href="logout.jsp">安全退出</a>
</td>
</table>
<%
}
%>
<h1>新增圖書</h1>
<hr/>
<div id="before">
<a href="javascript: window.history.go(-1)">返回上一級</a>
</div>
</br>
<form action="admin_do_addbook.jsp" method="post" name="registerForm">
<div>
<tr>
<label>圖書名稱:</label>
<input type="text" name="bookname" id="bookname" placeholder="圖書名稱" autofocus="autofocus">
</tr>
</div>
<div>
<tr>
<label>圖書價格:</label></td>
<input type="text" name="price" id="price" placeholder="圖書價格(數字)">
</tr>
</div>
<div>
<tr>
<label>圖書作者:</label>
<input type="text" name="author" id="author" placeholder="圖書作者">
</tr>
</div>
<div>
<tr>
<label>出版公司:</label>
<input type="text" name="publish" id="publish" placeholder="出版公司">
</tr>
</div>
<div id="submitbtn">
<tr>
<button type="submit" onclick="return checkForm()">添加</button>
<button type="reset">重置</button>
</tr>
</div>
</form>
<script type="text/javascript">
function checkForm() {
var bookname = registerForm.bookname.value;
var price = registerForm.price.value;
//alert(name + pwd + repwd);
if (bookname == "" || bookname == null) {
alert("請輸入圖書名稱");
registerForm.bookname.focus();
return false;
} else if (price == "" || price == null) {
alert("請輸入圖書價格");
registerForm.price.focus();
return false;
}
alert('添加成功!');
return true;
}
</script>
</body>
</html>
admin_delete.jsp
<%@ page import="com.sjsq.po.Book" %>
<%@ page import="com.sjsq.dao.impl.BookDaoImpl" %>
<%@ page import="com.sjsq.dao.BookDao" %>
<%@ page import="com.sjsq.po.User" %><%--
Created by IntelliJ IDEA.
User: shuijianshiqing
Date: 2020/6/10
Time: 22:45
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>刪除圖書</title>
<style type="text/css">
#before{
text-align: center;
}
body{
background-color: antiquewhite;
}
#head{
background: #eeeeee;height: 80px;
}
#headLink{
font-size: 20px;
}
#headWelLink{
font-size: 20px;
}
</style>
</head>
<body>
<%--頭部信息--%>
<%
User user =(User)session.getAttribute("user");
if(user == null){
response.sendRedirect("login.jsp");
}else {
%>
<div id="head">
<table width="100%">
<td id="headWelLink">歡迎您:<%=user.getName()%></td>
<td align="right" id="headLink">
<a href="logout.jsp">安全退出</a>
</td>
</table>
</div>
<%
}
%>
<%
// 設置獲取註冊時的編碼爲UTF-8
request.setCharacterEncoding("UTF-8");
//獲取admin.jsp頁面的bookid
Integer bookid=Integer.parseInt(request.getParameter("bookid"));
//引入數據交互層
BookDao dao=new BookDaoImpl();
Book book=new Book();
book = dao.getBook(bookid);
System.out.println("刪除的圖書信息:");
System.out.println(book);
boolean flag=dao.deleteBook(bookid);
if(flag){
response.sendRedirect("admin.jsp");
}else{
response.sendRedirect("error.jsp");
}
%>
</body>
</html>
admin_detail.jsp
<%--
Created by IntelliJ IDEA.
User: shuijianshiqing
Date: 2020/5/24
Time: 10:51
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %>
<%@ page import="com.sjsq.po.Book" %>
<%@ page import="com.sjsq.po.User" %>
<%
// 獲取絕對路徑路徑 ,開發項目一定要使用絕對路徑,不然肯定出錯
String path = request.getContextPath();
String basePath = request.getScheme() + "://" + request.getServerName() + ":"
+ request.getServerPort() + path + "/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<base href="<%=basePath %>" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>圖書詳情</title>
<style type="text/css">
h1{
text-align: center;
}
body{
background-color: antiquewhite;
}
a{
text-align:center;font-size: 24px;text-decoration: none;
}
a:hover{
text-decoration: underline;font-size: 20px;
}
#before{
text-align: center;
}
#head{
background: #eeeeee;height: 80px;
}
#headLink{
font-size: 20px;
}
#headWelLink{
font-size: 20px;
}
</style>
</head>
<body>
<%--頭部信息--%>
<%
User user =(User)session.getAttribute("user");
if(user == null){
response.sendRedirect("login.jsp");
}else {
%>
<div id="head">
<table width="100%">
<td id="headWelLink">歡迎您:<%=user.getName()%></td>
<td align="right" id="headLink">
<a href="logout.jsp">安全退出</a>
</td>
</table>
</div>
<%
}
%>
<h1>圖書詳情</h1>
<div id="before">
<a href="javascript: window.history.go(-1)">返回上一級</a>
</div>
<%
Book book = (Book)session.getAttribute("book");
%>
<table align="center" cellpadding="20" cellspacing="20">
<tr style="font-size: 20px">
<td>圖書編號</td>
<td>圖書名稱</td>
<td>圖書價格</td>
<td>圖書作者</td>
<td>圖書封皮</td>
<td>圖書出版社</td>
</tr>
<tr>
<td><%=book.getBookid()%></td>
<td><%=book.getBookname()%></td>
<td><%=book.getPrice()%></td>
<td><%=book.getAuthor()%></td>
<td><%=book.getPicture()%></td>
<td><%=book.getPublish()%></td>
</tr>
<tr>
<td colspan="3"></td>
<td></td>
<td colspan="2"></td>
</tr>
</table>
<div style="text-align:center;font-size: 36px;">
<a href="admin.jsp">圖書列表</a>
</div>
</body>
</html>
admin_do_addbook.jsp
<%--
Created by IntelliJ IDEA.
User: shuijianshiqing
Date: 2020/5/21
Time: 23:45
To change this template use File | Settings | File Templates.
--%>
<%@page import="com.sjsq.dao.impl.UserDaoImpl"%>
<%@page import="com.sjsq.dao.UserDao"%>
<%@page import="com.sjsq.po.User"%>
<%@ page import="com.sjsq.po.Book" %>
<%@ page import="com.sjsq.dao.BookDao" %>
<%@ page import="com.sjsq.dao.impl.BookDaoImpl" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" 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>處理新增圖書</title>
<style type="text/css">
#before{
text-align: center;
}
#head{
background: #eeeeee;height: 80px;
}
#headLink{
font-size: 20px;
}
#headWelLink{
font-size: 20px;
}
</style>
</head>
<body>
<%--頭部信息--%>
<%
User user =(User)session.getAttribute("user");
if(user == null){
response.sendRedirect("login.jsp");
}else {
%>
<div id="head">
<table width="100%">
<td id="headWelLink">歡迎您:<%=user.getName()%></td>
<td align="right" id="headLink">
<a href="logout.jsp">安全退出</a>
</td>
</table>
</div>
<%
}
%>
<%
// 設置獲取註冊時的編碼爲UTF-8
request.setCharacterEncoding("UTF-8");
Book book=new Book();
//獲取admin_addbook.jsp頁面提交的賬號和密碼
String bookname=request.getParameter("bookname");
Double price= Double.parseDouble(request.getParameter("price"));
String author=request.getParameter("author");
String publish=request.getParameter("publish");
//獲取admin_addbook.jsp頁面提交的賬號和密碼設置到實體類User中
book.setBookname(bookname);
book.setPrice(price);
book.setAuthor(author);
book.setPublish(publish);
System.out.println("添加的圖書信息");
System.out.println(book);
//引入數據交互層
BookDao dao=new BookDaoImpl();
boolean flag=dao.addBook(book);
if(flag){
response.sendRedirect("admin.jsp");
}else{
response.sendRedirect("error.jsp");
}
%>
</body>
</html>
admin_do_info.jsp
<%--
Created by IntelliJ IDEA.
User: shuijianshiqing
Date: 2020/5/24
Time: 10:51
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %>
<%@ page import="com.sjsq.po.Book" %>
<%@ page import="com.sjsq.service.BookService" %>
<%@ page import="com.sjsq.service.impl.BookServiceImpl" %>
<%
// 獲取絕對路徑路徑 ,開發項目一定要使用絕對路徑,不然肯定出錯
String path = request.getContextPath();
String basePath = request.getScheme() + "://" + request.getServerName() + ":"
+ request.getServerPort() + path + "/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<base href="<%=basePath %>" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>書籍信息</title>
</head>
<body>
<%
Book book = new Book();
String sid = request.getParameter("bookid");
Integer id = Integer.parseInt(sid);
BookService service = new BookServiceImpl();
book.setBookid(id);
Book bookCur = service.getBook(book);
// 控制檯打印出類的信息(日誌的前身)
System.out.print("admin_do_info.jsp的信息-->");
System.out.println(bookCur);
session.setAttribute("book", bookCur);
response.sendRedirect("admin_detail.jsp");
%>
</body>
</html>
admin_do_updatebook.jsp
<%--
Created by IntelliJ IDEA.
User: shuijianshiqing
Date: 2020/5/21
Time: 23:45
To change this template use File | Settings | File Templates.
--%>
<%@page import="com.sjsq.dao.impl.UserDaoImpl"%>
<%@page import="com.sjsq.dao.UserDao"%>
<%@page import="com.sjsq.po.User"%>
<%@ page import="com.sjsq.po.Book" %>
<%@ page import="com.sjsq.dao.BookDao" %>
<%@ page import="com.sjsq.dao.impl.BookDaoImpl" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" 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>處理修改圖書</title>
<style type="text/css">
#before{
text-align: center;
}
#head{
background: #eeeeee;height: 80px;
}
#headLink{
font-size: 20px;
}
#headWelLink{
font-size: 20px;
}
</style>
</head>
<body>
<%--頭部信息--%>
<%
User user =(User)session.getAttribute("user");
if(user == null){
response.sendRedirect("login.jsp");
}else {
%>
<div id="head">
<table width="100%">
<td id="headWelLink">歡迎您:<%=user.getName()%></td>
<td align="right" id="headLink">
<a href="logout.jsp">安全退出</a>
</td>
</table>
</div>
<%
}
%>
<%
// 設置獲取註冊時的編碼爲UTF-8
request.setCharacterEncoding("UTF-8");
//獲取admin_addbook.jsp頁面提交的賬號和密碼
Integer bookid=Integer.parseInt(request.getParameter("bookid"));
String bookname = request.getParameter("bookname");
Double price = Double.parseDouble(request.getParameter("price"));
String author=request.getParameter("author");
String publish=request.getParameter("publish");
//引入數據交互層
BookDao dao=new BookDaoImpl();
Book book=new Book();
book = dao.getBook(bookid);
book.setBookname(bookname);
book.setPrice(price);
book.setAuthor(author);
book.setPublish(publish);
System.out.println("修改的圖書信息");
System.out.println(book);
boolean flag=dao.updateBook(book);
if(flag){
response.sendRedirect("admin.jsp");
}else{
response.sendRedirect("error.jsp");
}
%>
</body>
</html>
admin_update.jsp
<%@ page import="com.sjsq.po.Book" %>
<%@ page import="com.sjsq.dao.impl.BookDaoImpl" %>
<%@ page import="com.sjsq.dao.BookDao" %>
<%@ page import="com.sjsq.po.User" %><%--
Created by IntelliJ IDEA.
User: shuijianshiqing
Date: 2020/5/21
Time: 23:14
To change this template use File | Settings | File Templates.
--%>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>修改圖書</title>
<style type="text/css">
h1{
text-align: center;
}
h4{
text-align: center;color: red;
}
body{
background-color: antiquewhite;
}
div{
text-align: center;
}
#before{
text-align: center;
}
#head{
background: #eeeeee;height: 80px;
}
#headLink{
font-size: 20px;
}
#headWelLink{
font-size: 20px;
}
</style>
</head>
<body>
<%--頭部信息--%>
<%
User user =(User)session.getAttribute("user");
if(user == null){
response.sendRedirect("login.jsp");
}
%>
<h1>修改圖書</h1>
<hr/>
<%
//獲取admin.jsp頁面的bookid
Integer bookid=Integer.parseInt(request.getParameter("bookid"));
BookDao dao=new BookDaoImpl();
Book book=new Book();
book = dao.getBook(bookid);
%>
<form action="admin_do_updatebook.jsp" method="post" name="registerForm">
<div>
<tr>
<input type="hidden" name="bookid" id="bookid" value="<%=book.getBookid()%>">
</tr>
</div>
<div>
<tr>
<label>圖書名稱:</label>
<input type="text" name="bookname" id="bookname" value="<%=book.getBookname()%>" autofocus="autofocus">
</tr>
</div>
<div>
<tr>
<label>圖書價格:</label></td>
<input type="text" name="price" id="price" value="<%=book.getPrice()%>">
</tr>
</div>
<div>
<tr>
<label>圖書作者:</label>
<input type="text" name="author" id="author" value="<%=book.getAuthor()%>">
</tr>
</div>
<div>
<tr>
<label>出版公司:</label>
<input type="text" name="publish" id="publish" value="<%=book.getPublish()%>">
</tr>
</div>
<div>
<tr>
<button type="submit" onclick="return checkForm()">修改</button>
<button type="reset">重置</button>
</tr>
</div>
</form>
<script type="text/javascript">
function checkForm() {
var bookname = registerForm.bookname.value;
var price = registerForm.price.value;
//alert(name + pwd + repwd);
if (bookname == "" || bookname == null) {
alert("請輸入圖書名稱");
registerForm.bookname.focus();
return false;
} else if (price == "" || price == null) {
alert("請輸入圖書價格");
registerForm.price.focus();
return false;
}
alert('修改成功!');
return true;
}
</script>
</body>
</html>
error.jsp
<%--
Created by IntelliJ IDEA.
User: shuijianshiqing
Date: 2020/6/10
Time: 22:28
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>錯誤頁面</title>
</head>
<body>
操作出錯,請回到上一個頁面!
</hr>
</body>
</html>
login.jsp
<%--
Created by IntelliJ IDEA.
User: shuijianshiqing
Date: 2020/5/19
Time: 22:44
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %>
<%
// 獲取絕對路徑路徑 ,開發項目一定要使用絕對路徑,不然肯定出錯
String path = request.getContextPath();
String basePath = request.getScheme() + "://" + request.getServerName() + ":"
+ request.getServerPort() + path + "/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<base href="<%=basePath %>" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>用戶登錄</title>
<style type="text/css">
h1{
text-align: center;
}
h4{
text-align: center;color: red;
}
body{
background-color: antiquewhite;
}
a{
text-decoration: none;font-size: 20px;color: black;
}
a:hover{
text-decoration: underline;font-size: 24px;color: red;
}
</style>
</head>
<body>
<form action="info.jsp" method="post">
<h1>用戶登錄</h1>
<h4>---正在美化中---</h4>
<hr/>
<table align="center">
<tr>
<td>賬號:</td>
<td><input type="text" name="name" id="name" placeholder="請輸入您的賬號" autofocus="autofocus"></td>
</tr>
<tr>
<td>密碼:</td>
<td><input type="password" name="password" id="password" placeholder="請輸入您的密碼"></td>
<td><a href="searchPassword.jsp">找回密碼</a></td>
</tr>
<tr>
<td colspan="1">
</td>
<td>
<input type="submit" value="登錄"/>
<input type="reset" value="重置"/>
<a href="register.jsp" target="_blank">註冊</a>
</td>
</tr>
</table>
</form>
</body>
</html>
2.後端
User
package com.sjsq.po;
import java.io.Serializable;
/**
* @author shuijianshiqing
* @date 2020/5/19 22:19
* 用戶的實體類
*/
public class User implements Serializable {
// 增加序列號,作用是反序列化的時候不會報錯,切能進行IO的持久化
public static final long serialVersionUID = 1L;
private Integer id;
private String name;
private String password;
private String email;
private String phone;
private Integer isadmin;
public static long getSerialVersionUID() {
return serialVersionUID;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public Integer getIsadmin() {
return isadmin;
}
public void setIsadmin(Integer isadmin) {
this.isadmin = isadmin;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", password='" + password + '\'' +
", email='" + email + '\'' +
", phone='" + phone + '\'' +
", isadmin=" + isadmin +
'}';
}
}
UserDaoImpl
package com.sjsq.dao.impl;
import com.sjsq.dao.UserDao;
import com.sjsq.po.User;
import com.sjsq.utils.BaseDao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
/**
* @author shuijianshiqing
* @date 2020/5/20 22:15
* 實現UserDao接口
*/
public class UserDaoImpl implements UserDao {
/**
* 用戶登錄
* @param user
* @return
*/
@Override
public User login(User user) {
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
// 1.獲取數據庫連接
con = BaseDao.getConnection();
// 2.寫sql
String sql = "select * from user where name = ? and password = ?";
// 3.預編譯
ps = con.prepareStatement(sql);
// 4.設置值
ps.setObject(1,user.getName());
ps.setObject(2,user.getPassword());
rs = ps.executeQuery();
User users = null;
if(rs.next()){
users = new User();
// 從數據庫中獲取值到實體類的setter方法中
users.setId(rs.getInt("id"));
users.setName(rs.getString("name"));
users.setPassword(rs.getString("password"));
users.setEmail(rs.getString("email"));
users.setPhone(rs.getString("phone"));
users.setIsadmin(rs.getInt("isadmin"));
// 返回的是你查詢出來的完整的對象
return users;
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}finally {
// 關閉資源,避免出現異常
BaseDao.close(con,ps,rs);
}
return null;
}
/**
* 用戶註冊
* @param user
* @return
*/
@Override
public boolean register(User user) {
String sql = "insert into user values (0,?,?,?,?,0)";
List<Object> list = new ArrayList<Object>();
list.add(user.getName());
list.add(user.getPassword());
list.add(user.getEmail());
list.add(user.getPhone());
boolean flag = BaseDao.addUpdateDelete(sql,list.toArray());
if(flag){
return true;
}else {
return false;
}
}
/**
* 查詢用戶信息
* @param sql
* @param arr
* @return
*/
@Override
public List<User> selectUser(String sql, Object[] arr) {
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
// 1.連接數據庫
con = BaseDao.getConnection();
// 2.預編譯
ps = con.prepareStatement(sql);
if(arr != null){
for (int i = 0; i < arr.length; i++) {
ps.setObject(i+1,arr[i]);
}
}
// 3.執行sql
rs = ps.executeQuery();
// 4.保存查詢出來的數據到list
List<User> list = new ArrayList<User>();
while(rs.next()){
User user = new User();
// 從數據庫中獲取值到實體類的setter方法中
user.setId(rs.getInt("id"));
user.setName(rs.getString("name"));
user.setPassword(rs.getString("password"));
user.setEmail(rs.getString("email"));
user.setPhone(rs.getString("phone"));
user.setIsadmin(rs.getInt("isadmin"));
// 測試數據
System.out.println("Dao層測試日誌,顯示用戶信息:");
System.out.println(user);
// 將對象保存到list中
list.add(user);
}
return list;
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}finally {
// 關閉資源,避免出現異常
BaseDao.close(con,ps,rs);
}
return null;
}
}
BookDao
package com.sjsq.dao;
import com.sjsq.po.Book;
import java.util.List;
/**
* @author shuijianshiqing
* @date 2020/5/20 23:13
* 圖書信息接口
*/
public interface BookDao {
/**
* 查詢圖書信息
* @param sql
* @param arr
* @return
*/
public List<Book> select(String sql,Object[] arr);
/**
* 根據圖書編號進行查詢
* @param id
* @return
*/
public Book getBook(Integer id);
/**
* 圖書新增
* @param book
* @return
*/
public boolean addBook(Book book);
/**
* 圖書修改
* @param book
* @return
*/
public boolean updateBook(Book book);
/**
* 刪除圖書
* @param bookid
* @return
*/
public boolean deleteBook(Integer bookid);
}
BookDaoImpl
package com.sjsq.dao.impl;
import com.sjsq.dao.BookDao;
import com.sjsq.po.Book;
import com.sjsq.utils.BaseDao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
/**
* @author shuijianshiqing
* @date 2020/5/20 23:15
*/
public class BookDaoImpl implements BookDao {
@Override
public List<Book> select(String sql, Object[] arr) {
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
// 1.連接數據庫
con = BaseDao.getConnection();
// 2.預編譯
ps = con.prepareStatement(sql);
if(arr != null){
for (int i = 0; i < arr.length; i++) {
// 傳入sql的參數
ps.setObject(i+1,arr[i]);
}
}
// 3.執行sql
rs = ps.executeQuery();
// 4.保存查詢出來的數據到list
List<Book> list = new ArrayList<Book>();
while (rs.next()){
Book book = new Book();
book.setBookid(rs.getInt("bookid"));
book.setBookname(rs.getString("bookname"));
book.setPrice(rs.getDouble("price"));
book.setAuthor(rs.getString("author"));
book.setPicture(rs.getString("picture"));
book.setPublish(rs.getString("publish"));
list.add(book);
}
return list;
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}finally {
// 關閉資源,避免出現異常
BaseDao.close(con,ps,rs);
}
return null;
}
@Override
public Book getBook(Integer id) {
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
// 1.連接數據庫
con = BaseDao.getConnection();
// 2.預編譯
String sql = "select * from book where bookid = ?";
ps = con.prepareStatement(sql);
ps.setInt(1,id);
// 3.執行sql
rs = ps.executeQuery();
while (rs.next()){
Book book = new Book();
book.setBookid(rs.getInt("bookid"));
book.setBookname(rs.getString("bookname"));
book.setPrice(rs.getDouble("price"));
book.setAuthor(rs.getString("author"));
book.setPicture(rs.getString("picture"));
book.setPublish(rs.getString("publish"));
return book;
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}finally {
// 關閉資源,避免出現異常
BaseDao.close(con,ps,rs);
}
return null;
}
/**
* 新增圖書
* @param book
* @return
*/
@Override
public boolean addBook(Book book) {
String sql = "insert into book values (0,?,?,?,null,?)";
List<Object> list = new ArrayList<Object>();
list.add(book.getBookname());
list.add(book.getPrice());
list.add(book.getAuthor());
list.add(book.getPublish());
boolean flag = BaseDao.addUpdateDelete(sql,list.toArray());
if(flag){
return true;
}else {
return false;
}
}
/**
* 更新圖書
* @param book
* @return
*/
@Override
public boolean updateBook(Book book) {
String sql = "update book set bookname=?,price=?,author=?,publish=? where bookid=?";
List<Object> list = new ArrayList<Object>();
list.add(book.getBookname());
list.add(book.getPrice());
list.add(book.getAuthor());
list.add(book.getPublish());
list.add(book.getBookid());
boolean flag = BaseDao.addUpdateDelete(sql,list.toArray());
if(flag){
return true;
}else {
return false;
}
}
/**
* 刪除圖書
* @param bookid
* @return
*/
@Override
public boolean deleteBook(Integer bookid) {
String sql = "delete from book where bookid=?";
List<Object> list = new ArrayList<Object>();
list.add(bookid);
boolean flag = BaseDao.addUpdateDelete(sql,list.toArray());
if(flag){
return true;
}else {
return false;
}
}
}
BookServiceImpl
package com.sjsq.service.impl;
import com.sjsq.dao.BookDao;
import com.sjsq.dao.impl.BookDaoImpl;
import com.sjsq.po.Book;
import com.sjsq.service.BookService;
import java.util.ArrayList;
import java.util.List;
/**
* @author shuijianshiqing
* @date 2020/5/20 23:42
* Book的Service實現層
*/
public class BookServiceImpl implements BookService {
private BookDao dao = new BookDaoImpl();
/**
* 查詢所有圖書信息
* @param book
* @return
*/
@Override
public List<Book> select(Book book) {
StringBuffer sql = new StringBuffer("select * from book where 1 = 1 ");
List<Object> list = new ArrayList<Object>();
if(book != null){
// 根據bookid來查找對應的書籍
if(book.getBookid() != null && book.getBookid() != 0){
sql.append(" and bookid = ?");
list.add(book.getBookid());
}
// 根據bookname來查找對應的書籍
if(book.getBookname() != null){
System.out.println("圖書名稱:"+book.getBookname());
sql.append(" and bookname = ?");
list.add(book.getBookname());
}
}
return dao.select(sql.toString(),list.toArray());
}
/**
* 根據圖書編號查詢信息
* @param book
* @return
*/
@Override
public Book getBook(Book book) {
if(book.getBookid() != null && book.getBookid() != 0){
return dao.getBook(book.getBookid());
}
return null;
}
}
四、感悟及商務合作
實現管理增刪改查用了一晚上時間,感覺代碼越寫越順了。
雞湯:勇敢走自己的路,相信自己的路。
備註1:這個項目是基於上個項目寫的,上個項目地址:
IDEA+Java+JSP+Mysql+Tomcat實現Web圖書管理系統
備註2:要是不知道IDEA如何搭建WEB項目,請移步:
IDEA創建Web項目詳細說明
備註3(商務合作):要是你自己對於本項目有定製化開發需求或者有什麼其他問題,可以聯繫博主QQ:3079118617,請備註:來源CSDN,有償服務。
備註4:要是你覺得本文對你有幫助,請多多支持博主。