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4 files changed

+75
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‎book/src/main/java/com/atguigu/utils/WebUtils.java‎

Lines changed: 16 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -28,4 +28,20 @@ public static <T> T copyParamTOBean(Map value, T bean){
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return bean;
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}
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31+
/**
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* 将字符串转为int类型
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*
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* @param strInt 接收传来的 字符串
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* @param defaultValue 默认值 (int)
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* @return 转成功就是 返回转换后的int值 ,失败 则返回 默认值
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*/
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public static int parseInt(String strInt,int defaultValue){
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try {
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return Integer.parseInt(strInt);
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} catch (Exception e) {
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e.printStackTrace();
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}
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return defaultValue;
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}
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}

‎book/src/main/java/com/atguigu/web/BookServlet.java‎

Lines changed: 27 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -19,7 +19,7 @@ public class BookServlet extends BaseServlet{
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protected void add(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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//1.获取请求参数 , 封装成 Book 对象
22-
Book book = WebUtils.copyParamTOBean(req.getParameterMap(), new Book());
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Book book = WebUtils.copyParamTOBean(req.getParameterMap(), new Book());//调用WebUtils工具类
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//2.调用BookServlet.add()方法 , 保存图书
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bookService.addBook(book);
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//3.请求重定向 到 图书列表 页面 /manager/bookServlet?action=list
@@ -28,19 +28,43 @@ protected void add(HttpServletRequest req, HttpServletResponse resp) throws Serv
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}
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protected void delete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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//1.获取请求参数id,图书编号
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int id = WebUtils.parseInt(req.getParameter("id"), 0);
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//2.调用bookService.deleteBookById(); 删除图书
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bookService.deleteBookById(id);
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//3.重定向 回图书管理页面
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// /manager/bookServlet?action=list
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resp.sendRedirect(req.getContextPath()+ "/manager/bookServlet?action=list");
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}
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34-
protected void update(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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42+
protected void getBook(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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//1.获取请求参数 id = 图书编号
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int id = WebUtils.parseInt(req.getParameter("id"), 0);
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//2.调用 bookService.queryBookById() 查询图书
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Book book = bookService.queryBookById(id);
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//3.保存图书到Request域中
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req.setAttribute("book",book);
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//4.请求转发到 /pages/manager/book_edit.jsp
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req.getRequestDispatcher("/pages/manager/book_edit.jsp").forward(req,resp);
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}
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protected void update(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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//1.获取请求参数 , 封装成Book对象
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Book book = WebUtils.copyParamTOBean(req.getParameterMap(), new Book());
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//2.调用bookService.updateBook(),将修改好的数据保存到数据库中
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bookService.updateBook(book);
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//3.重定向回 图书管理页面 list那个
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resp.sendRedirect(req.getContextPath()+"/manager/bookServlet?action=list");
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}
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protected void list(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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//1.通过BookService 查询全部图书
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List<Book> books = bookService.queryBooks();
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//2.把全部图书 保存到Request域
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req.setAttribute("books",books);
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//3.请求转发到 /pages/manager/book_manager.jsp
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//3.请求转发到 /pages/manager/book_edit.jsp
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req.getRequestDispatcher("/pages/manager/book_manager.jsp").forward(req,resp);
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}
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}

‎book/src/main/webapp/pages/manager/book_edit.jsp‎

Lines changed: 7 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -32,7 +32,8 @@
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<div id="main">
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<form action="manager/bookServlet" method="get">
35-
<input type="hidden" name="action" value="add">
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<input type="hidden" name="action" value="${param.method}">
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<input type="hidden" name="id" value="${requestScope.book.id}">
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<table>
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<tr>
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<td>名称</td>
@@ -43,11 +44,11 @@
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<td colspan="2">操作</td>
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</tr>
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<tr>
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<td><input name="name" type="text" value="时间简史"/></td>
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<td><input name="price" type="text" value="30.00"/></td>
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<td><input name="author" type="text" value="霍金"/></td>
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<td><input name="sales" type="text" value="200"/></td>
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<td><input name="stock" type="text" value="300"/></td>
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<td><input name="name" type="text" value="${requestScope.book.name}"/></td>
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<td><input name="price" type="text" value="${requestScope.book.price}"/></td>
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<td><input name="author" type="text" value="${requestScope.book.author}"/></td>
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<td><input name="sales" type="text" value="${requestScope.book.sales}"/></td>
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<td><input name="stock" type="text" value="${requestScope.book.stock}"/></td>
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<td><input type="submit" value="提交"/></td>
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</tr>
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</table>

‎book/src/main/webapp/pages/manager/book_manager.jsp‎

Lines changed: 25 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -7,6 +7,28 @@
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<title>图书管理</title>
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<%-- 静态包含 base标签/css样式/jQuery文件 --%>
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<%@include file="/pages/common/head.jsp"%></head>
10+
<script type="text/javascript">
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$(function (){
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//给删除的a标签 绑定单击事件, 用于确定删除
13+
$("a.deleteClass").click(function (){
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//在事件的function()函数中,有一个this对象,这个this对象,是对当前正在响应事件的dom对象
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/*
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confirm是确认提示框函数
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参数是它的内容
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有两个按钮一个是确认一个是取消
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返回true表示 点了,确认,返回false表示取消
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*/
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return confirm("你确定要删除["+ $(this).parent().parent().find("td:first").text() +"]?");
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//return false//阻止元素的默认行为==不提交请求
25+
26+
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})
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})
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</script>
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<body>
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<div id="header">
@@ -36,8 +58,8 @@
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<td>${book.author}</td>
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<td>${book.sales}</td>
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<td>${book.stock}</td>
39-
<td><a href="book_edit.jsp">修改</a></td>
40-
<td><a href="#">删除</a></td>
61+
<td><a href="manager/bookServlet?action=getBook&id=${book.id}&method=update">修改</a></td>
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<td><a class="deleteClass" href="manager/bookServlet?action=delete&id=${book.id}">删除</a></td>
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</tr>
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</c:forEach>
@@ -50,7 +72,7 @@
5072
<td></td>
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<td></td>
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<td></td>
53-
<td><a href="pages/manager/book_edit.jsp">添加图书</a></td>
75+
<td><a href="pages/manager/book_edit.jsp?method=add">添加图书</a></td>
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</tr>
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</table>
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</div>

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