整合SSM

Posted lmx-181028

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编写Controller层和视图层

bookController类编写

1、方法一：查询全部书籍

package com.star.controller;

import com.star.pojo.books;
import com.star.service.bookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

@Controller
@RequestMapping("/book")
public class bookController {

    @Autowired
    @Qualifier("bookServiceImpl")
    private bookService bookService;

    @RequestMapping("/allBook")
    public String allBook(Model model){
        List<books> books = bookService.queryAllBooks();
        model.addAttribute("books",books);
        return "allBook";
    }
    
}

2、编写index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>首页</title>
    <style type="text/css">
      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: 4px;
      }
    </style>

  </head>
  <body>
  <h3>
    <a href="${pageContext.request.contextPath}/book/allBook">点击进入列表页</a>
  </h3>
  </body>
</html>

3、书籍列表页面

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>书籍列表</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 Bootstrap -->
    <link href="https://cdn.bootcss.com/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">
        <div class="col-md-4 column">
            <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增</a>
        </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>书籍名字</th>
                    <th>书籍数量</th>
                    <th>书籍详情</th>
                    <th>操作</th>
                </tr>
                </thead>

                <tbody>
                <c:forEach var="book" items="${requestScope.get('books')}">
                    <tr>
                        <td>${book.getBookID()}</td>
                        <td>${book.getBookName()}</td>
                        <td>${book.getBookCounts()}</td>
                        <td>${book.getDetail()}</td>
                        <td>
                            <a class="btn btn-success" href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}">更改</a>
                            <a class="btn btn-danger" href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>
</div>

</body>
</html>

4、编写方法二：添加书籍

    @RequestMapping("/toAddBook")
    public String toAdd(){
        //跳转到添加书籍的页面
        return "toAddBook";
    }

    @PostMapping("/addBook")
    public String addBook(books book){
        //接收添加书籍页面提交来的books并添加到数据库
        bookService.addBook(book);
        return "redirect:/book/allBook";//重定向到展示页面
    }

5、添加书籍页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>添加页面</title>

    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.bootcss.com/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>新增书籍</small>
                </h1>
            </div>
        </div>
    </div>

    <form action="${pageContext.request.contextPath}/book/addBook" method="post">
        书名：<input type="text" name="bookName"><br><br><br>
        数量：<input type="text" name="bookCounts"><br><br><br>
        描述：<input type="text" name="detail"><br><br><br>
        <input type="submit" value="添加">
    </form>

</div>

</body>
</html>

6、方法三：修改书籍

    @RequestMapping("/toUpdateBook")
    public String toUpdateBook(int id,Model model){
        //通过传过来的id查找书籍并传给前端
        books book = bookService.queryBookById(id);
        model.addAttribute("book",book);
        return "toUpdateBook";
    }

    @PostMapping("/UpdateBook")
    public String UpdateBook(books book){
        bookService.updateBook(book);
        return "redirect:/book/allBook";
    }

7、修改页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>修改页面</title>

    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 Bootstrap -->
    <link href="https://cdn.bootcss.com/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>修改书籍</small>
                </h1>
            </div>
        </div>
    </div>

    <form action="${pageContext.request.contextPath}/book/UpdateBook" method="post">
        <input type="hidden" name="bookID" value="${book.getBookID()}">
        书名：<input type="text" name="bookName" value="${book.getBookName()}"><br><br><br>
        数量：<input type="text" name="bookCounts" value="${book.getBookCounts()}"><br><br><br>
        描述：<input type="text" name="detail" value="${book.getDetail()}"><br><br><br>
        <input type="submit" value="修改">
    </form>

</div>

</body>
</html>

8、方法四：删除书籍

    @RequestMapping("/del/{bookID}")
    public String deleteBook(@PathVariable("bookID") int id){
        //通过页面传递的id删除对应的书籍
        bookService.deleteBookByID(id);
        return "redirect:/book/allBook";
    }

新增搜索功能

我们添加一个根据书籍名字查找书籍的功能

1、接口及xml编写

    // 模糊查询
    public List<books> selectBook(@Param("name") String name);
    <select id="selectBook" parameterType="String" resultType="books">
        select * from ssmbuild.books
        where bookName like CONCAT ('%',#{name},'%')
        -- 采用模糊查询
    </select>

2、service层编写

bookService

    // 模糊查询
    public List<books> selectBook(@Param("name") String name);

bookServiceImpl

    public List<books> selectBook(String name) {
        return bookMapper.selectBook(name);
    }

3、controller层编写

    @PostMapping("/select")
    public String selectBook(String bookName,Model model){
        List<books> books = bookService.selectBook(bookName);
        if(books.size()==0){//如果没找到就返回错误信息并展示所有的书籍
            books = bookService.queryAllBooks();
            model.addAttribute("error","未查到！");
        }
        model.addAttribute("books",books);
        return "allBook";
    }

4、给页面中添加搜索框错误信息标签

这两个div都写在row的div里面，与新增在同一行

        <%--在新增帮加一个显示所有书籍的链接--%>
        <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBook">显示全部书籍</a>

        <div class="col-md-4 column">
            <span style="color:red;font-weight: bold;font-size: 20px;">
                 ${error}
            </span>
        </div>

        <div class="col-lg-4">
            <form action="${pageContext.request.contextPath}/book/select" method="post">
                <div class="input-group">
                    <input type="text" class="form-control" name="bookName" placeholder="请输入要查找的书籍名称">
                    <span class="input-group-btn">
                        <button class="btn btn-primary" type="submit">查找</button>
                    </span>
                </div>
            </form>
        </div>

效果展示：

技术图片

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