配置spring-mvc.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4.        xmlns:context="http://www.springframework.org/schema/context"
  5.        xmlns:mvc="http://www.springframework.org/schema/mvc"
  6.        xsi:schemaLocation="http://www.springframework.org/schema/beans
  7.    http://www.springframework.org/schema/beans/spring-beans.xsd
  8.    http://www.springframework.org/schema/context
  9.    http://www.springframework.org/schema/context/spring-context.xsd
  10.    http://www.springframework.org/schema/mvc
  11.    https://www.springframework.org/schema/mvc/spring-mvc.xsd">
  13.     <!-- 1.开启SpringMVC注解驱动 -->
  14.     <mvc:annotation-driven/>
  15.     <!-- 2.静态资源默认servlet配置-->
  16.     <mvc:default-servlet-handler/>
  18.     <!-- 3.配置ViewResolver视图解析器 -->
  19.     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  20.         <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
  21.         <property name="prefix" value="/WEB-INF/jsp/"/>
  22.         <property name="suffix" value=".jsp"/>
  23.     </bean>
  25.     <!-- 4.扫描web相关的bean -->
  26.     <context:component-scan base-package="com.wjh.controller"/>
  28. </beans>

编写控制器

package com.wjh.controller;

import com.wjh.po.Book;
import com.wjh.service.BookService;
import com.wjh.service.BookServiceImpl;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

/**
 * @author wjh
 * @date 2021/7/21 19:10
 * @Package com.wjh.controller
 */
@Controller
@RequestMapping("/book")
public class BookController {
    private final BookService bookService;

    public BookController(BookServiceImpl bookService) {
        this.bookService = bookService;
    }

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

    @RequestMapping("/toAddBook")
    public String toAddBook() {
        return "addBook";
    }

    @RequestMapping("/addBook")
    public String addBook(Book book) {
        bookService.addBook(book);
        return "redirect:/book/allBooks";
    }

    @RequestMapping("/toUpdateBook")
    public String toUpdateBook(Model model, int id) {
        Book book = bookService.queryBookById(id);
        System.out.println(book);
        model.addAttribute("book", book);
        return "updateBook";
    }

    @RequestMapping("/updateBook")
    public String updateBook(Model model, Book book) {
        bookService.updateBook(book);
        Book books = bookService.queryBookById(book.getId());
        model.addAttribute("books", book);
        return "redirect:/book/allBooks";
    }

    @RequestMapping("/deleteBook/{bookId}")
    public String deleteBook(@PathVariable("bookId") int id) {
        bookService.deleteBookById(id);
        return "redirect:/book/allBooks";
    }
}

编写视图层（以JSP为例）

addBook.jsp

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

<html>
<head>
    <title>新增书籍</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>新增书籍</small>
                </h1>
            </div>
        </div>
    </div>
    <form action="${pageContext.request.contextPath}/book/addBook" method="post">
        书籍名称：<input type="text" name="bookName"><br><br><br>
        书籍数量：<input type="text" name="bookCounts"><br><br><br>
        书籍详情：<input type="text" name="detail"><br><br><br>
        <input type="submit" value="添加">
    </form>

</div>

queryBook.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="${books}">
                    <tr>
                        <td>${book.id}</td>
                        <td>${book.bookName}</td>
                        <td>${book.bookCounts}</td>
                        <td>${book.detail}</td>
                        <td>
                            <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.id}">更改</a> |
                            <a href="${pageContext.request.contextPath}/book/deleteBook/${book.id}">删除</a>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>
</div>

updateBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改信息</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>修改信息</small>
                </h1>
            </div>
        </div>
    </div>

    <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
        <input type="hidden" name="id" value="${book.id}"/>
        书籍名称：<input type="text" name="bookName" value="${book.bookName}"/>
        书籍数量：<input type="text" name="bookCounts" value="${book.bookCounts}"/>
        书籍详情：<input type="text" name="detail" value="${book.detail }"/>
        <input type="submit" value="提交"/>
    </form>

</div>

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>首页</title>
  </head>
  <body>
<h3>
  <a href="${pageContext.request.contextPath}/book/allBooks">进入书籍展示页面</a>
</h3>
  </body>
</html>