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  • SpringMVC-08-整合SSM之CRUD

    查询书籍功能

    1. 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";
    }

}

    2. 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 {
             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>

    3. 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

    1. 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>

    2. 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
}

    3. 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

    1. 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>

    2. 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>
    &nbsp;|&nbsp;
    <a href="${pageContext.request.contextPath}/book/deleteBook/${book.bookID}">删除</a>
</td>

    3. 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

    1. 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>

    2. BookService接口和BookServiceImpl

      //查询一本书
Books queryBookByName(String bookName);

      public Books queryBookByName(String bookName) {

    return bookMapper.queryBookByName(bookName);
}

    3. 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";
}

    4. 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

    在这里插入图片描述

    在这里插入图片描述

    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。
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  • 原文地址：https://www.cnblogs.com/CodeHuba/p/13664173.html
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