查询书籍功能
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完善Controller：
BookController@Controller @RequestMapping("/book") public class BookController { //coontroller层调service层 @Autowired @Qualifier("BookServiceImpl") private BookService bookService; //查询全部的书籍，并且返回到书籍展示也命啊 @RequestMapping("/allBook") public String list(Model model){ List<Books> books = bookService.queryAllBook(); model.addAttribute("list",books); return "allBook"; } } -
完善首页
index.jsp<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>首页</title> <style> a { text-decoration: none; color: black; font-size: 18px; } h3 { width: 180px; height: 38px; margin: 100px auto; text-align: center; line-height: 38px; background: deepskyblue; border-radius: 5px; } </style> </head> <body> <h3> <a href="${pageContext.request.contextPath}/book/allBook">进入书籍页面</a> </h3> </body> </html> -
完善查询书籍页面
allBook.jsp<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>书籍展示</title> <%--BookStrap美化界面--%> <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column" > <div class="page-header"> <h1> <small>书籍列表----显示所有书籍</small> </h1> </div> </div> </div> <div class="row clearfix"> <div class="col-md-12 column"> <table class="table table-hover table-striped"> <thead> <tr> <th>书籍编号</th> <th>书籍名称</th> <th>书籍数量</th> <th>书籍详情</th> </tr> </thead> <%--书籍从数据库中查询得到 books遍历出来：foreach--%> <tbody> <c:forEach var="book" items="${list}"> <tr> <td>${book.bookID}</td> <td>${book.bookName}</td> <td>${book.bookCounts}</td> <td>${book.detail}</td> </tr> </c:forEach> </tbody> </table> </div> </div> </div> </body> </html>
增加书籍功能
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在显示所有书籍页面添加 新增书籍按钮
allBook.jsp<div class="row"> <div class="col-md-4 column"> <%--toAddBook--%> <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a> </div> </div> -
新增跳转功能和添加书籍功能
BookController.java//跳转到增加书籍页面 @RequestMapping("/toAddBook") public String toAddPaper(){ return "addBook"; } //添加书籍的请求 @RequestMapping("/addBook") public String addBook(Books books){ System.out.println("addBook"+books); bookService.addBook(books); return "redirect:/book/allBook"; //重定向到@RequestMapping("/allBook")请求 } -
新增添加书籍页面及表单
addBook.jsp<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>增加书籍</title> <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1> <small>书籍列表----新增书籍</small> </h1> </div> </div> </div> <form action="${pageContext.request.contextPath}/book/addBook" method=""> <div class="form-group"> <label>书籍名称：</label> <input type="text" name="bookName" class="form-control" required> </div> <div class="form-group"> <label>书籍数量：</label> <input type="text" name="bookCounts" class="form-control" required> </div> <div class="form-group"> <label>书籍描述：</label> <input type="text" name="detail" class="form-control" required > </div> <div class="form-group"> <input type="submit" class="form-control" value="添加"> </div> </form> </div> </body> </html>
修改删除书籍
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修改页面
updateBook<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>修改书籍</title> <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1> <small>书籍列表----修改书籍</small> </h1> </div> </div> </div> <form action="${pageContext.request.contextPath}/book/updateBook" method="get"> <%--出现的问题，我们提交了sql请求，但是修改失败，看一下sql语句能否执行成功，前端没传id，前端应该传递隐藏域--%> <input type="hidden" name="bookID" value="${Qbooks.bookID}"> <div class="form-group"> <label>书籍名称：</label> <input type="text" name="bookName" class="form-control" value="${Qbooks.bookName}" required> </div> <div class="form-group"> <label>书籍数量：</label> <input type="text" name="bookCounts" class="form-control" value="${Qbooks.bookCounts}" required> </div> <div class="form-group"> <label>书籍描述：</label> <input type="text" name="detail" class="form-control" value="${Qbooks.detail}" required > </div> <div class="form-group"> <input type="submit" class="form-control" value="修改"> </div> </form> </div> </body> </html> -
增加修改和删除的链接
allBook.jsp<td> <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.bookID}">修改</a> | <a href="${pageContext.request.contextPath}/book/deleteBook/${book.bookID}">删除</a> </td> -
Controller新增修改和删除方法
//跳转到修改页面 @RequestMapping("/toUpdateBook") public String toUpdatePaper(int id,Model model){ Books books = bookService.queryBookById(id); model.addAttribute("Qbooks",books); return "updateBook"; } //修改书籍 @RequestMapping("/updateBook") public String updateBook(Books books){ System.out.println("updateBook:"+books); bookService.updateBook(books); return "redirect:/book/allBook"; } //删除书籍 @RequestMapping("/deleteBook/{bookId}") public String deleteBook(@PathVariable("bookId") int id){ bookService.deleteBookById(id); return "redirect:/book/allBook"; }
从零开始增加按书名查询功能
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BookMapper接口和BookMapper.xml
//查询一本书 Books queryBookByName(@Param("bookName")String bookName);<select id="queryBookByName" resultType="Books"> select * from ssmbuild.books where bookName=#{bookName}; </select> -
BookService接口和BookServiceImpl
//查询一本书 Books queryBookByName(String bookName);public Books queryBookByName(String bookName) { return bookMapper.queryBookByName(bookName); } -
Controller
//查询书籍 @RequestMapping("/queryBook") public String queryBook(String queryBookName,Model model){ Books books = bookService.queryBookByName(queryBookName); List<Books> list = new ArrayList<Books>(); list.add(books); if(books==null){ list = bookService.queryAllBook(); model.addAttribute("error","未查到"); } model.addAttribute("list",list); return "allBook"; } -
前台页面
allBook.jsp<div class="col-md-8 column"> <%--查询书籍--%> <form class="form-inline" action="${pageContext.request.contextPath}/book/queryBook" method="get" style="float:right"> <span style="color: red;font-weight: bold">${error}</span> <input type="text" name="queryBookName" class="form-control" placeholder="请输入要查询的书的名称"> <input type="submit" value="查询" class="btn btn-primary"> </form> </div>
项目结构
image-20200804170615454.png
image-20200804170635286.png
小结及展望
这是第一个SSM整合案例，一定要烂熟于心！
SSM框架的重要程度不言而喻。
