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  • SpringMVC:使用Restful完成简单的图书管理系统的增删改查

    一.  Rest风格的API与传统API的区别

    SpringMVC:使用Restful完成简单的图书管理系统的增删改查

    SpringMVC:使用Restful完成简单的图书管理系统的增删改查

    二.  添加依赖

    本项目共需要以下依赖:

    • commons-logging-1.2.jar

    • druid-1.1.6.jar

    • fastjson-1.2.47.jar

    • jstl.jar

    • mysql-connector-java-5.1.47.jar

    • spring-aop-5.1.8.RELEASE.jar

    • spring-beans-5.1.8.RELEASE.jar

    • spring-context-5.1.8.RELEASE.jar

    • spring-core-5.1.8.RELEASE.jar

    • spring-expression-5.1.8.RELEASE.jar

    • spring-jdbc-5.1.8.RELEASE.jar

    • spring-tx-5.1.8.RELEASE.jar

    • spring-web-5.1.8.RELEASE.jar

    • spring-webmvc-5.1.8.RELEASE.jar

    • standard.jar

    三.  Entity

    Book:

    package io.zhangjia.springmvc.entity;
    
    public class Book {
        private Integer bookId;
        private String name;
        private String author;
        private Double price;
    
        @Override
        public String toString() {
            return "Book{" +
                    "bookId=" + bookId +
                    ", name='" + name + '\'' +
                    ", author='" + author + '\'' +
                    ", price=" + price +
                    '}';
        }
    
        public Integer getBookId() {
            return bookId;
        }
    
        public void setBookId(Integer bookId) {
            this.bookId = bookId;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public String getAuthor() {
            return author;
        }
    
        public void setAuthor(String author) {
            this.author = author;
        }
    
        public Double getPrice() {
            return price;
        }
    
        public void setPrice(Double price) {
            this.price = price;
        }
    }

    四.  BookDao

    package io.zhangjia.springmvc.dao;   
    import io.zhangjia.springmvc.entity.Book;
    
    import java.util.List;
    
    public interface BookDao {
        int doInsert(Book book);
        int doDelete(Integer bookId);
        int doUpdate(Book book);
        List<Book> queryAll();
        Book queryById(Integer bookId);
    }}

    BookDaoImpl:

    这里不再使用xml文件配置,而是使用注解的方式

    package io.zhangjia.springmvc.dao.impl;
    
    import io.zhangjia.springmvc.dao.BookDao;
    import io.zhangjia.springmvc.entity.Book;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.jdbc.core.BeanPropertyRowMapper;
    import org.springframework.jdbc.core.JdbcTemplate;
    import org.springframework.stereotype.Repository;
    
    import java.util.List;
    
    @Repository("bookDao")
    public class BookDaoImpl implements BookDao {
    
        @Autowired
        private JdbcTemplate jdbcTemplate;
    
        @Override
        public int doInsert(Book book) {
            String sql = "INSERT INTO book (name, author, price) VALUES (?,?,?)";
            return jdbcTemplate.update(sql,book.getName(),book.getAuthor(),book.getPrice());
        }
    
        @Override
        public int doDelete(Integer bookId) {
            String sql = "DELETE FROM book WHERE book_id = ?";
            return jdbcTemplate.update(sql,bookId);
        }
    
        @Override
        public int doUpdate(Book book) {
            String sql = "UPDATE book SET name = ?, author = ?, price = ? WHERE book_id = ?";
            return jdbcTemplate.update(sql,book.getName(),book.getAuthor(),book.getPrice(),book.getBookId());
        }
    
        @Override
        public List<Book> queryAll() {
            String sql = "SELECT * FROM book";
            return jdbcTemplate.query(sql,new BeanPropertyRowMapper<>(Book.class));
        }
    
        @Override
        public Book queryById(Integer bookId) {
            String sql = "SELECT * FROM book WHERE book_id = ?";
            return jdbcTemplate.queryForObject(sql,new BeanPropertyRowMapper<>(Book.class),bookId);
        }
    }

    五.  Service

    BookService :

    package io.zhangjia.springmvc.service;
    
    import io.zhangjia.springmvc.entity.Book;
    
    import java.util.List;
    
    public interface BookService {
    
        List<Book> books();
    
        Book getBook(Integer bookId);
    
        boolean saveOrUpdate(Book book);
    
        boolean delete(Integer id);
    
    }

    BookServiceImpl :

    package io.zhangjia.springmvc.service.impl;
    
    import io.zhangjia.springmvc.dao.BookDao;
    import io.zhangjia.springmvc.entity.Book;
    import io.zhangjia.springmvc.service.BookService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import java.util.List;
    
    @Service("bookService")
    public class BookServiceImpl implements BookService {
    
        @Autowired
        private BookDao bookDao;
    
        @Override
        public List<Book> books() {
            return bookDao.queryAll();
        }
    
        @Override
        public Book getBook(Integer bookId) {
            return bookDao.queryById(bookId);
        }
    
        @Override
        public boolean saveOrUpdate(Book book) {
            int result = 0;
            if (book.getBookId() == null){
                //添加
                result = bookDao.doInsert(book);
            }else {
                //修改
                result = bookDao.doUpdate(book);
            }
            return result == 1;
        }
    
        @Override
        public boolean delete(Integer id) {
            return bookDao.doDelete(id) == 1;
        }
    }

    六.  Controller

    BookController :

    package io.zhangjia.springmvc.;
    
    import com.alibaba.fastjson.JSON;
    import io.zhangjia.springmvc.entity.Book;
    import io.zhangjia.springmvc.service.BookService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.*;
    
    import java.util.List;
    
    @Controller
    public class BookController {
    
        @Autowired
        private BookService bookService;
    
        @GetMapping("/books")
        public String books(Model model){
            List<Book> books = bookService.books();
            System.out.println(JSON.toJSONString(books));
            model.addAttribute("books",books);
            return "books";
        }
    
        @GetMapping("/book")
        public String addForm(){
            return "form";
        }
    
        @GetMapping("/book/{id}")
        public String editForm(@PathVariable Integer id, Model model){
            Book book = bookService.getBook(id);
            model.addAttribute("book",book);
            return "form";
        }
    
        @PostMapping(value = "/book",produces = "application/json;charset=utf-8")
        @ResponseBody
        public String save(Book book){
            boolean b = bookService.saveOrUpdate(book);
            return "{\"success\":"+b+"}";
        }
    
        @PutMapping(value = "/book",produces = "application/json;charset=utf-8")
        @ResponseBody
        public String update(Book book){
            System.out.println("put-book = " + book);
            boolean b = bookService.saveOrUpdate(book);
            return "{\"success\":"+b+"}";
        }
    
        @DeleteMapping(value = "/book/{id}",produces = "application/json;charset=utf-8")
        @ResponseBody
        public String delete(@PathVariable Integer id){
            boolean b = bookService.delete(id);
            return "{\"success\":"+b+"}";
        }
    
    }

    七.  spring-mvc.xml

    <?xml version="1.0" encoding="UTF-8"?>   
    <beans xmlns="http://www.springframework.org/schema/beans"   
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   
    xmlns:context="http://www.springframework.org/schema/context"   
    xmlns:mvc="http://www.springframework.org/schema/mvc"   
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">   
    
    <!--配置扫描组件-->
    <!--在XML中配置了这个标签后,spring可以自动扫描base-package下面或者子包下面的java文件,如果扫描有@Component @Service @Controller等这些注解的类,则把这些类注册为bean。
     https://www.cnblogs.com/vanl/p/5733655.html
     -->
    <context:component-scan base-package="io.zhangjia.springmvc"/>  
     
    <!--读取properties文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/> 
    
    
    <!--配置视图解析器-->  
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">   
    <property name="prefix" value="/WEB-INF/views/"/>   
    <property name="suffix" value=".jsp"/>   
    </bean>
    
    
    <!--静态资源的请求转由Web容器处理-->    
    <mvc:default-servlet-handler/>   
    
    
    <!--配置默认组件-->
        <mvc:annotation-driven/>  <!--如果不配置这个,那么静态资源可以访问,Controller无法访问-->
    
        
    <!--配置数据库连接池-->  
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">   
    <property name="driverClassName" value="${jdbc.driver}"/> <!--    OGNL-->    
    <property name="url" value="${jdbc.url}"/>   
    <property name="username" value="${jdbc.username}"/>   
    <property name="password" value="${jdbc.password}"/>   
    </bean>   
    
    <!--配置jdbcTemplate--> 
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">   
    <property name="dataSource" ref="dataSource"/>   
    </bean>   
    </beans>

    八.  web.xml

    web.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
             version="4.0">
            <!--解決中文乱码-->
        <filter>
            <filter-name>characterEncodingFilter</filter-name>
            <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
            <init-param>
                <param-name>encoding</param-name>
                <param-value>utf-8</param-value>
            </init-param>
        </filter>
        <filter-mapping>
            <filter-name>characterEncodingFilter</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
    
        
        <!--配置hiddenHttpMethodFilter-->
        <!--浏览器只支持Post和get的方式,想要实现delete和put的方式,需要使用过滤器HiddenHttpMethodFilter-->
        <filter>
            <filter-name>hiddenHttpMethodFilter</filter-name>
            <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
        </filter>
        <filter-mapping>
            <filter-name>hiddenHttpMethodFilter</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
    
        
        <!--配置请求分配器开始-->
        <servlet>
            <servlet-name>dispatcherServlet</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <!--配置SpringMVC配置文件的路径-->
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:spring-mvc.xml</param-value>
            </init-param>
            <!--在web容器启动时完成初始化-->
            <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
            <servlet-name>dispatcherServlet</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
    
    </web-app>

    九.  JSP

    books.jsp

    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <c:set var="path" value="${pageContext.request.contextPath}"/>
    <html>
    <head>
        <title>图书列表</title>
        <link rel="stylesheet" href="${path}/static/css/bootstrap.min.css"/>
        <script type="text/javascript" src="${path}/static/js/jquery-1.8.3.min.js"></script>
        <script type="text/javascript">
            function del(e) {
                var tr = $(e).parent().parent();
                var id = tr.children(":first").text();
                $.ajax({
                    url:"${path}/book/"+id,
                    type:"post",
                    data:{
                        _method:"delete"
                    },
                    success:function (res) {
                        if(res.success){
                            //删除tr
                            tr.remove();
                        }else {
                            alert("失败");
                        }
                    }
                });
            }
        </script>
    </head>
    <body class="container">
        <h1>图书列表</h1>
        <a href="${path}/book" class="btn btn-success mb-2">添加</a>
        <table class="table table-striped">
            <tr>
                <th>编号</th>
                <th>书名</th>
                <th>作者</th>
                <th>价格</th>
                <th>操作</th>
            </tr>
            <c:forEach items="${requestScope.books}" var="book">
                <tr>
                    <td>${book.bookId}</td>
                    <td>${book.name}</td>
                    <td>${book.author}</td>
                    <td>${book.price}</td>
                    <td>
                        <a class="btn btn-sm btn-primary" href="${path}/book/${book.bookId}">修改</a>
                        <a class="btn btn-sm btn-danger" href="javascript:void (0)" onclick="del(this)">删除</a>
                    </td>
                </tr>
            </c:forEach>
        </table>
    </body>
    </html>

    form.jsp:

    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <c:set var="path" value="${pageContext.request.contextPath}"/>
    <html>
    <head>
        <c:if test="${requestScope.book == null}">
            <title>添加图书</title>
        </c:if>
        <c:if test="${requestScope.book != null}">
            <title>修改图书</title>
        </c:if>
        <link rel="stylesheet" href="${path}/static/css/bootstrap.min.css"/>
        <script type="text/javascript" src="${path}/static/js/jquery-1.8.3.min.js"></script>
        <script type="text/javascript">
            $(function () {
                $(":submit").click(function () {
                    var data = $("#book-form").serialize();
                    $.ajax({
                        url:"${path}/book",
                        type:"post",
                        data:data,
                        success:function (res) {
                            if(res.success){
                                location = "${path}/books";
                            }else{
                                alert("失败");
                            }
                        }
                    });
                    return false;
                });
            });
        </script>
    </head>
    <body class="container">
        <c:if test="${requestScope.book == null}">
            <h1>添加图书</h1>
        </c:if>
        <c:if test="${requestScope.book != null}">
            <h1>修改图书</h1>
        </c:if>
        <form id="book-form" role="form" action="" method="post">
            <c:if test="${requestScope.book != null}">
                <input type="hidden" name="bookId" value="${requestScope.book.bookId}">
                <input type="hidden" name="_method" value="put">
            </c:if>
            <div class="form-group">
                <label for="name">名称</label>
                <input type="text" class="form-control" name="name" id="name" value="${requestScope.book.name}"
                       placeholder="请输入名称">
            </div>
            <div class="form-group">
                <label for="author">作者</label>
                <input type="text" class="form-control" name="author" value="${requestScope.book.author}"
                       id="author"
                       placeholder="请输入作者">
            </div>
            <div class="form-group">
                <label for="price">价格</label>
                <input type="text" class="form-control" name="price" id="price" value="${requestScope.book.price}"
                       placeholder="请输入价格">
            </div>
            <input class="btn btn-primary" type="submit" value="提交">
        </form>
    </body>
    </html>

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