【SSM整合】

项目介绍

• 使用SSM框架搭建出一套简单的CRUD项目示例

技术点

• 基础框架-SSM（Spring+SpringMVC+Mybatis）
• 数据库-MySQL
• 前端框架-Bootstrap
• 依赖管理-Maven

环境搭建

数据库

CREATE DATABASE `ssmbuild`;

USE `ssmbuild`;

DROP TABLE IF EXISTS `books`;

CREATE TABLE `books` (
`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',
`bookName` VARCHAR(100) NOT NULL COMMENT '书名',
`bookCounts` INT(11) NOT NULL COMMENT '数量',
`detail` VARCHAR(200) NOT NULL COMMENT '描述',
KEY `bookID` (`bookID`)
) ENGINE=INNODB DEFAULT CHARSET=utf8

INSERT  INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES
(1,'Java',1,'从入门到放弃'),
(2,'MySQL',10,'从删库到跑路'),
(3,'Linux',5,'从进门到进牢');

meavn工程

• 设置打包方式为war

• 设置meavn为本地仓库

• 设置web.xml

• 导入jar包

  <dependencies>
          <!--Junit-->
          <dependency>
              <groupId>junit</groupId>
              <artifactId>junit</artifactId>
              <version>4.12</version>
          </dependency>
      
          <!--数据库驱动-->
          <dependency>
              <groupId>mysql</groupId>
              <artifactId>mysql-connector-java</artifactId>
              <version>5.1.47</version>
          </dependency>
      
          <!-- 数据库连接池 -->
          <dependency>
              <groupId>com.mchange</groupId>
              <artifactId>c3p0</artifactId>
              <version>0.9.5.2</version>
          </dependency>
      
          <!--Servlet - JSP -->
          <dependency>
              <groupId>javax.servlet</groupId>
              <artifactId>servlet-api</artifactId>
              <version>2.5</version>
          </dependency>
          <dependency>
              <groupId>javax.servlet.jsp</groupId>
              <artifactId>jsp-api</artifactId>
              <version>2.2</version>
          </dependency>
          <dependency>
              <groupId>javax.servlet</groupId>
              <artifactId>jstl</artifactId>
              <version>1.2</version>
          </dependency>
  
          <!--Mybatis-->
          <dependency>
              <groupId>org.mybatis</groupId>
              <artifactId>mybatis</artifactId>
              <version>3.5.2</version>
          </dependency>
          <dependency>
              <groupId>org.mybatis</groupId>
              <artifactId>mybatis-spring</artifactId>
              <version>2.0.2</version>
          </dependency>
  
          <!--Spring-->
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-webmvc</artifactId>
              <version>5.1.9.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-jdbc</artifactId>
              <version>5.1.9.RELEASE</version>
          </dependency>
          <!-- Spring5和Thymeleaf整合包 -->
      
          <dependency>
              <groupId>org.thymeleaf</groupId>
              <artifactId>thymeleaf-spring5</artifactId>
              <version>3.0.12.RELEASE</version>
          </dependency>
          <!--日志文件-->
      
          <dependency>
              <groupId>ch.qos.logback</groupId>
              <artifactId>logback-classic</artifactId>
              <version>1.2.3</version>
          </dependency>
  </dependencies>

• 基本框架结构

  • dao
  • service
  • pojo
  • controller

配置文件

web.xml

• 配置dispatcherServlet 配置路径选择为spring也就是最大的配置文件域
• 配置字符编码过滤器
• session时间等等

<?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">
<!--    dispatcherServlet注意初始化的时候绑定一个更大的，因为配置文件分开了只有mvc的话是没有bean的-->
    <servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
<!--    乱码过滤-->
    <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>
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
<!--    session过期时间-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>

</web-app>

数据库配置

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123456

mybatis-config

• 设置别名
• 引入mapper

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!--设置连接数据库的环境交给Spring处理-->

    <typeAliases>
        <package name="com.me.pojo"/>
    </typeAliases>

    <!--引入映射文件-->
    <mappers>
        <mapper resource="com/me/dao/BookMapper.xml"/>
    </mappers>
</configuration>

配置bean的时候注意id小写

spring-dao

• 连接数据库信息
• 数据库连接池
• SqlSessionFactory
• 扫描dao包下的类，交给spring来管理

<?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"
       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">

<!--1.关联数据库文件-->
    <context:property-placeholder location="classpath:database.properties"/>
<!--2.连接池-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"></property>
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>

        <!-- c3p0连接池的私有属性 -->
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <!-- 关闭连接后不自动commit -->
        <property name="autoCommitOnClose" value="false"/>
        <!-- 获取连接超时时间 -->
        <property name="checkoutTimeout" value="10000"/>
        <!-- 当获取连接失败重试次数 -->
        <property name="acquireRetryAttempts" value="2"/>

    </bean>

<!--3.SqlSessionFactory-->

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!-- 4.配置扫描Dao接口包，动态实现Dao接口注入到spring容器中 -->
    <!--解释 ：https://www.cnblogs.com/jpfss/p/7799806.html-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 给出需要扫描Dao接口包 -->
        <property name="basePackage" value="com.me.dao"/>
    </bean>

</beans>

spring-service

• 扫描service包的类，交给spring来管理
• 事务相关配置（暂时没有配）

<?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"
       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">

<!--    扫描service下的类-->
    <context:component-scan base-package="com.me.service"/>
<!--       注入属性-->
    <bean id="bookServiceImpl" class="com.me.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>

    </bean>
<!--声明式事务配置-->
<!--    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">-->
<!--        <property name="dataSource" value="dataSource"/>-->
<!--    </bean>-->
</beans>

spring-mvc

• 开启注解驱动
• 静态资源过滤
• 扫描controller下的类，交给spring来管理
• 视图解析器

<?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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc
       https://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

    <!--    1.注解驱动-->
    <mvc:annotation-driven/>
    <!--    2.静态资源过滤-->
    <mvc:default-servlet-handler/>
    <!--    3.扫描包-->
    <context:component-scan base-package="com.me.controller"/>
    <!--    4.视图解析器-->
    <!-- 配置Thymeleaf视图解析器 -->
    <bean id="viewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
        <property name="order" value="1"/>
        <property name="characterEncoding" value="UTF-8"/>
        <property name="templateEngine">
            <bean class="org.thymeleaf.spring5.SpringTemplateEngine">
                <property name="templateResolver">
                    <bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">

                        <!-- 视图前缀 -->
                        <property name="prefix" value="/WEB-INF/templates/"/>

                        <!-- 视图后缀 -->
                        <property name="suffix" value=".html"/>
                        <property name="templateMode" value="HTML5"/>
                        <property name="characterEncoding" value="UTF-8" />
                    </bean>
                </property>
            </bean>
        </property>
    </bean>
</beans>

spring（总配置文件）

• applicationContext.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

<!--    注意项目结构是否正确，导入的是否正确-->
    <import resource="classpath:spring-service.xml"></import>
    <import resource="classpath:spirng-dao.xml"></import>
    <import resource="classpath:spring-mvc.xml"></import>

</beans>

• 配置文件除了web.xml全部放在resource目录下交给spring来处理

编写实体类

package com.me.pojo;

/**
 * @Author Maple
 * @Date 2022/5/31 18:45
 * @Version 1.0
 */
public class Books {

    private Integer bookID;

    private String bookName;

    private Integer bookCounts;

    private String detail;

    public Books() {
    }

    public Books(Integer bookID, String bookName, Integer bookCounts, String detail) {
        this.bookID = bookID;
        this.bookName = bookName;
        this.bookCounts = bookCounts;
        this.detail = detail;
    }

    public Integer getBookID() {
        return bookID;
    }

    public void setBookID(Integer bookID) {
        this.bookID = bookID;
    }

    public String getBookName() {
        return bookName;
    }

    public void setBookName(String bookName) {
        this.bookName = bookName;
    }

    public Integer getBookCounts() {
        return bookCounts;
    }

    public void setBookCounts(Integer bookCounts) {
        this.bookCounts = bookCounts;
    }

    public String getDetail() {
        return detail;
    }

    public void setDetail(String detail) {
        this.detail = detail;
    }

    @Override
    public String toString() {
        return "Books{" +
                "bookID=" + bookID +
                ", bookName='" + bookName + '\'' +
                ", bookCounts=" + bookCounts +
                ", detail='" + detail + '\'' +
                '}';
    }
}

编写DAO

接口

• 注意@Param注解与sql对应

public interface BookMapper {
	//增加一本书
    int addBook(Books books);
    //通过id删除一本书
    int deleteBookById(@Param("bookId") int id);
    //更新一本书
    int updateBook(Books books);
    //通过id查询一本书
    Books queryBookById(@Param("bookId") int id);
    //查询全部书籍
    List<Books> queryAllBook();
    //通过名称查询
    Books queryBookByName(@Param("bookName") String bookName);   
}

实现类（mapper）

• 注意namespace与接口对应
• 注意sql的id与方法名对应
• 返回值

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.me.dao.BookMapper">

<!--    int addBook(Books books);-->
    <insert id="addBook" parameterType="Books">
        insert into ssmbuild.books(bookName, bookCounts, detail)
        values (#{bookName},#{bookCounts},#{detail})
    </insert>
<!--    int deleteBookById(int id);-->
    <delete id="deleteBookById" parameterType="int">
        delete from ssmbuild.books where bookID=#{bookId}
    </delete>

<!--    int updateBook(Books books);-->
    <update id="updateBook" parameterType="Books">
        update ssmbuild.books
        set bookName = #{bookName},bookCounts=#{bookCounts},detail=#{detail}
        where bookID=#{bookID};
    </update>
<!--    Books queryBookById(int id);-->
    <select id="queryBookById" resultType="Books">
        select * from ssmbuild.books where bookID=#{bookId}
    </select>
<!--    List<Books> queryAllBook();-->
    <select id="queryAllBook" resultType="Books">
        select * from ssmbuild.books
    </select>
<!--    Books queryBookByName(@Param("bookName") String bookName);-->
    <select id="queryBookByName" resultType="Books">
        select * from ssmbuild.books where bookName=#{bookName}
    </select>
</mapper>

编写Service

接口

public interface BookService {
    //C
    int addBook(Books books);
    //D
    int deleteBookById(int id);
    //U
    int updateBook(Books books);
    //R
    Books queryBookById(int id);
    //R
    List<Books> queryAllBook();

    Books queryBookByName(String bookName);
}

实现类

• service调用dao也就是mapper

public class BookServiceImpl implements BookService{

    private BookMapper bookMapper;

    public void setBookMapper(BookMapper bookMapper) {
        this.bookMapper = bookMapper;
    }

    public int addBook(Books books) {
        return bookMapper.addBook(books);
    }

    public int deleteBookById(int id) {
        return bookMapper.deleteBookById(id);
    }

    public int updateBook(Books books) {
        return bookMapper.updateBook(books);
    }

    public Books queryBookById(int id) {
        return bookMapper.queryBookById(id);
    }

    public List<Books> queryAllBook() {
        return bookMapper.queryAllBook();
    }

    public Books queryBookByName(String bookName) {
        return bookMapper.queryBookByName(bookName);
    }
}

编写前端页面和控制器

• 注意html引入Thymeleaf

<html lang="en" xmlns:th="http://www.thymeleaf.org">

• @Autowired：根据属性类型进行自动装配
• @Qualifier：根据名称进行注入 这个@Qualifier 注解的使用，和上面@Autowired 一起使用

首页

页面

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
    <style>
        a{
            text-decoration: none;
            color: black;
            font-size: 18px;
        }
    </style>
<body>
<h1>你好</h1>

<a th:href="@{/allBook}">查询所有书籍</a>

</body>
</html>

控制器

@Controller
public class BookController {

    @Autowired
    @Qualifier("bookServiceImpl")
    private BookService bookService;
    
    //返回首页
    @RequestMapping("/")
    public String index(){
        return "index";
    }

}

书籍显示

• 包含了以下跳转连接或按钮
  • 添加书籍
  • 删除书籍
  • 修改书籍
  • 查询书籍
  • 显示书籍

页面

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>全部书籍</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----显示所有书籍</small>
                    </h1>
                </div>
            </div>
            <div class="row">
                <div class="col-md-4 column">
                    <a class="btn btn-primary" th:href="@{/toAddBook}">新增书籍</a>
                    <a class="btn btn-primary" th:href="@{/allBook}">显示全部书籍</a>
                </div>
                <div class="col-md-4 column"></div>
                <div class="col-md-4 column">
                    <form th:action="@{/queryBook}" method="post" style="float: right">
                        <input type="text"  name="theBookName" class="form-control" placeholder="请输入查询书籍的名称" required>
                        <input type="submit" class="btn btn-primary" value="查询">
                    </form>
                </div>
            </div>
        </div>
    </div>

        <div class="row clearfix">
            <div class="col-md-12 column">
                <table class="table table-hover table-striped">
                    <thead>
                        <th>书籍编号</th>
                        <th>书籍名称</th>
                        <th>书籍数量</th>
                        <th>书籍详情</th>
                        <th>具体操作</th>
                    </thead>

                    <tbody>
                        <tr th:each="allbook: ${bookList}">
                            <td th:text="${allbook.bookID}"></td>
                            <td th:text="${allbook.bookName}"></td>
                            <td th:text="${allbook.bookCounts}"></td>
                            <td th:text="${allbook.detail}"></td>
                            <td>
                                <a th:href="@{/toUpdateBook/}+${allbook.bookID}">修改</a> &nbsp;|&nbsp;
                                <a th:href="@{/deleteBook/}+${allbook.bookID}">删除</a>
                            </td>
                        </tr>
                    </tbody>
                </table>

            </div>
        </div>

</body>
</html>

控制器

//查询全部书籍，并且返回到一个书籍展示页面
    @RequestMapping("/allBook")
    public String list(Model model){
        List<Books> books = bookService.queryAllBook();
        model.addAttribute("bookList", books);
        return "books";
    }

添加书籍

• 跳转过来的页面

页面

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>添加书籍</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>新增书籍</small>
                    </h1>
                </div>
            </div>
        </div>
    </div>

    <form th:action="@{/addOneBook}" method="post">
        <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>

</body>
</html>

控制器

//增加书籍
    @RequestMapping("/addOneBook")
    public String addBook(Books books){
        System.out.println("add->"+books.toString());
        bookService.addBook(books);
        return "redirect:/allBook";
    }

删除书籍

控制器

@RequestMapping("/deleteBook/{id}")
    public String deleteTheBook(@PathVariable("id") Integer bookId){
        bookService.deleteBookById(bookId);
        return "redirect:/allBook";
    }

修改书籍

• 跳转过来时注意回显数据

• 注意标签设置为 disabled时候是不能传递参数的,需要用隐藏域来传输

页面

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <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>修改书籍</small>
                    </h1>
                </div>
            </div>
        </div>
    </div>
    
    <form th:action="@{/updateOneBook}" method="post">

<!--        使用隐藏域来传递-->
        <input type="hidden" name="BookID" th:value="${theBook.bookID}">
        <div class="form-group">
            <label >书籍ID</label>
<!--            设置为disable时无法传递值-->
            <input type="text" name="showBookID" class="form-control" th:value="${theBook.bookID}" disabled>
        </div>
        <div class="form-group">
            <label >书籍名称</label>
            <input type="text" name="bookName" class="form-control" th:value="${theBook.bookName}">
        </div>
        <div class="form-group">
            <label >书籍数量</label>
            <input type="text" name="bookCounts" class="form-control" th:value="${theBook.bookCounts}">
        </div>
        <div class="form-group">
            <label >书籍描述</label>
            <input type="text" name="detail" class="form-control" th:value="${theBook.detail}">
        </div>
        <div class="form-group">
            <input type="submit" class="form-control" value="修改" >
        </div>
    </form>
</body>
</html>

控制器

//更新书籍
    @RequestMapping("/updateOneBook")
    public String updateBook(Books theBook){
        System.out.println("save->"+theBook.toString());
        bookService.updateBook(theBook);
        return "redirect:/allBook";
    }

通过名称查询书籍

控制器

@RequestMapping("/queryBook")
    public String queryBook(@RequestParam(value = "theBookName") String queryBookName , Model model){
        Books book = bookService.queryBookByName(queryBookName);

        if (book!=null){
            List<Books> books =new ArrayList<Books>();
            books.add(book);
            model.addAttribute("bookList", books);
        }
        return "books";
    }

总控制器

@Controller
public class BookController {

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

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

    //查询全部书籍，并且返回到一个书籍展示页面
    @RequestMapping("/allBook")
    public String list(Model model){
        List<Books> books = bookService.queryAllBook();
        model.addAttribute("bookList", books);
        return "books";
    }

    //跳转到增加书籍页面
    @RequestMapping("/toAddBook")
    public String toAddPage(){
        return "addBook";
    }

    //增加书籍
    @RequestMapping("/addOneBook")
    public String addBook(Books books){
        System.out.println("add->"+books.toString());
        bookService.addBook(books);
        return "redirect:/allBook";
    }

    //跳转到修改书籍页面
    @RequestMapping("/toUpdateBook/{id}")
    public String toUpdatePage(@PathVariable("id") Integer bookId,Model model){
        Books books=bookService.queryBookById(bookId);
        model.addAttribute("theBook", books);
        return "updateBook";
    }

    //更新书籍
    @RequestMapping("/updateOneBook")
    public String updateBook(Books theBook){
        System.out.println("save->"+theBook.toString());
        bookService.updateBook(theBook);
        return "redirect:/allBook";
    }

    //删除书籍
    @RequestMapping("/deleteBook/{id}")
    public String deleteTheBook(@PathVariable("id") Integer bookId){
        bookService.deleteBookById(bookId);
        return "redirect:/allBook";
    }

    @RequestMapping("/queryBook")
    public String queryBook(@RequestParam(value = "theBookName") String queryBookName , Model model){
        Books book = bookService.queryBookByName(queryBookName);

        if (book!=null){
            List<Books> books =new ArrayList<Books>();
            books.add(book);
            model.addAttribute("bookList", books);
        }
        return "books";
    }

}