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SpringMVC：整合SSM

news 来源：原创 2024/5/10 3:36:40

文章目录

一、整合SSM
- 1.1 开发环境
- - 1.1.1 运行环境
  - 1.1.2 数据库环境
  - 1.1.3 框架Maven环境
  - 1.1.4 MyBatis层环境+代码
  - 1.1.5 Spring层环境
  - 1.1.6 SpringMVC层环境
- 1.2 代码编写
- - 1.2.1 查询全部书籍
  - 1.2.2 添加书籍
  - 1.2.3 删除书籍
  - 1.2.4 修改书籍
  - 1.2.5 搜索书籍

学习视频来自于：秦疆（遇见狂神说）Bilibili地址
他的自学网站：kuangstudy

保持热爱、奔赴山河

一、整合SSM

1.1 开发环境

1.1.1 运行环境

IDEA：2022.2.1 (Ultimate Edition)
MySQL：8.0.29
Tomcat：8.5.81
Maven：3.8.6
JDK：1.8

知识要求
需要熟练掌握MySQL数据库（建表+CRUD），Spring、SpringMVC、JavaWeb、MyBatis、html、css、JavaScript、Jquery。

1.1.2 数据库环境

创建一个存放书籍数据的数据库表

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');

1.1.3 框架Maven环境

新建一Maven项目！ssmbuild ，添加web的支持。
导入相关的pom依赖。

<dependencies>
    <!--单元测试-->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
    <!--mybatis-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.10</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>2.0.7</version>
    </dependency>
    <!--数据库驱动-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.29</version>
    </dependency>
    <!--数据库连接池-->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.2.11</version>
    </dependency>
    <!--spring-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.3.22</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.3.22</version>
    </dependency>
    <!--aop织入-->
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.9.9.1</version>
    </dependency>
    <!--servlet、jsp、jstl-->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>4.0.1</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>javax.servlet.jsp-api</artifactId>
        <version>2.3.3</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>
</dependencies>

Maven资源过滤设置

<build>
    <!--静态资源导出问题    -->
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>
</build>

项目基本结构

pers.tianyu.pojo
pers.tianyu.dao
pers.tianyu.service
pers.tianyu.controller

1.1.4 MyBatis层环境+代码

数据库配置文件：database.properties

druid.driverClassName=com.mysql.cj.jdbc.Driver
druid.url=jdbc:mysql://localhost:3306/ssmbuild?userUnicode=true&characterEncoding=utf8&useSSL=true&serverTime=GMT%2B8
druid.username=root
druid.password=root

IDEA关联数据库（关联后写mapper方便一些，不关联也能开发）
编写MyBatis的核心配置文件：mybatis-config.xml

<?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>
    <!--    日志-->
    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
    <!--    实体类别名-->
    <typeAliases>
        <package name="pers.tianyu.pojo"/>
    </typeAliases>
    <!--    mapper映射-->
    <mappers>
        <package name="pers.tianyu.dao"/>
    </mappers>
</configuration>

编写数据库对应的实体类 pers.tianyu.pojo.Books

package pers.tianyu.pojo;

public class Books {
    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;
/**
*有参/无参构造方法
*set/get方法
*toString方法
**/
}

编写Dao层的Mapper接口 pers.tianyu.dao.BookMapper

package pers.tianyu.dao;

import pers.tianyu.pojo.Books;

import java.util.List;

public interface BookMapper {

    //    增加一个Book
    int addBook(Books book);

    //    根据id删除一个Book,@Param("id"):可以为参数指别名
    int deleteBookById(@Param("bookID") int id);

    //    更新Book
    int updateBook(Books book);

    //    根据id查询，返回Books
    Books queryBookById(@Param("bookID") int id);

    //    查询全部Book，返回list集合
    List<Books> queryAllBook();

    // 根据名字查询书籍
    List<Books> queryBookByName(@Param("bookName") String bookName);
}

编写接口对应的 Mapper.xml 文件。（需要导入MyBatis的包）
pers.tianyu.dao.BookMapper.xml（如果没有在pom.xml写静态资源导出,这里运行会出错）

<?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="pers.tianyu.dao.BookMapper">
    <!--    增加一个Book-->
    <insert id="addBook" parameterType="books">
        insert into ssmbuild.books(bookName, bookCounts, detail)
        VALUES (#{bookName}, #{bookCounts}, #{detail})
    </insert>
    <!--    根据id删除一个Book-->
    <delete id="deleteBookById" parameterType="_int">
        delete
        from ssmbuild.books
        where bookID = #{bookID}
    </delete>
    <!--    更新Book-->
    <update id="updateBook" parameterType="books">
        update ssmbuild.books
        set bookName   = #{bookName},
            bookCounts = #{bookCounts},
            detail     = #{detail}
        where bookID = #{bookID}
    </update>
    <!--    根据id查询，返回Books-->
    <select id="queryBookById" resultType="books" parameterType="_int">
        select bookID, bookName, bookCounts, detail
        from ssmbuild.books
        where bookID = #{bookID}
    </select>
    <!--    查询全部Book，返回list集合-->
    <select id="queryAllBook" resultType="books">
        select bookID, bookName, bookCounts, detail
        from ssmbuild.books
    </select>

    <!--    根据名字查询书籍-->
    <select id="queryBookByName" resultType="books">
        select bookID, bookName, bookCounts, detail
        from ssmbuild.books
        where bookName like "%"#{bookName}"%"
    </select>
</mapper>

编写Service层的接口和实现类
接口：pers.tianyu.service.BookService

package pers.tianyu.service;

import pers.tianyu.pojo.Books;

import java.util.List;

public interface BookService {
    //    增加一个Book
    int addBook(Books book);

    //    根据id删除一个Book
    int deleteBookById(int id);

    //    更新Book
    int updateBook(Books book);

    //    根据id查询，返回Books
    Books queryBookById(int id);

    //    查询全部Book，返回list集合
    List<Books> queryAllBook();

    // 根据名字查询书籍
    List<Books> queryBookByName(String bookName);
}

实现类：pers.tianyu.service.BookServiceImpl

package pers.tianyu.service;

import pers.tianyu.dao.BookMapper;
import pers.tianyu.pojo.Books;

import java.util.List;

public class BookServiceImpl implements BookService {

    // 调用dao层的操作，设置一个set接口，方便调用
    private BookMapper bookMapper;

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

    @Override
    public int addBook(Books book) {
        return bookMapper.addBook(book);
    }

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

    @Override
    public int updateBook(Books book) {
        return bookMapper.updateBook(book);
    }

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

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

    @Override
    public List<Books> queryBookByName(String bookName) {
        return bookMapper.queryBookByName(bookName);
    }
}

1.1.5 Spring层环境

配置Spring整合MyBatis，数据源使用druid连接池。
编写Spring整合Mybatis的相关的配置文件：spring-dao.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

    <!--配置整合mybatis-->
    <!--    1.关联数据库配置文件-->
    <context:property-placeholder location="classpath:database.properties"/>
    <!--    2.数据库连接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
    <!--    配置连接池属性-->
        <property name="driverClassName" value="${druid.driverClassName}"/>
        <property name="url" value="${druid.url}"/>
        <property name="username" value="${druid.username}"/>
        <property name="password" value="${druid.password}"/>
    </bean>
    <!--    3.配置SqlSessionFactory对象-->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactory">
        <!--        注入数据库连接池-->
        <property name="dataSource" ref="dataSource"/>
        <!--        配置mybatis全局配置文件：mybatis-config.xml-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>
    <!--    4.配置扫面dao接口包，动态实现Dao接口注入到Spring容器中-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--        注入sqlSessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--        扫描Dao接口包-->
        <property name="basePackage" value="pers.tianyu.dao"/>
    </bean>
</beans>

Spring整合service层：spring-service.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:aop="http://www.springframework.org/schema/aop" 
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://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/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd 
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!--    1.扫描service相关bean-->
    <context:component-scan base-package="pers.tianyu.service"/>
    <!--    2.BookServiceImpl注入容器-->
    <bean class="pers.tianyu.service.BookServiceImpl" id="bookService">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>
    <!--    3.事务管理器-->
    <bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager" id="transactionManager">
        <!--       注入数据库连接池-->
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--    4.aop事务支持-->
    <tx:advice transaction-manager="transactionManager" id="txAdvice">
        <!--        给那些方法配置事务，配置事务的传播特性-->
        <tx:attributes>
            <tx:method name="*" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>
    <!--    5.配置事务切入-->
    <aop:config>
        <aop:pointcut id="txPointCut" expression="execution(* pers.tianyu.service.*.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
    </aop:config>
</beans>

1.1.6 SpringMVC层环境

web.xml
如果项目还没有添加框架支持，就添加Web应用程序版本4.0
项目右键—>添加框架支持—>Web应用程序版本4.0

<?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">
    <!--    1.注册DispatcherServlet-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--        关联一个spring的配置文件
					这里加载的是总spring配置文件，spring-dao.xml、spring-service.xml、springmvc-servlet.xml都被引入这个配置文件
		-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <!--        启动级别-->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!--    2.SpringMVC乱码过滤器-->
    <filter>
        <filter-name>encoding</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>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!--    Session过期时间-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>

springmvc-servlet.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SpringMVC-->
    <!--    1.支持mvc注解驱动-->
    <mvc:annotation-driven/>
    <!--    2.让SpringMVC不处理静态资源(静态资源默认servlet配置)-->
    <mvc:default-servlet-handler/>
    <!--    3.自动扫描包,让指定包下的注解生效,由IOC容器统一管理-->
    <context:component-scan base-package="pers.tianyu.controller"/>
    <!--    4.视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver">
        <!--        前缀：自己的页面放哪里，地址就写哪里，不要照抄-->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!--        后缀-->
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

Spring配置整合文件：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"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

    <!--引入配置文件-->
    <import resource="classpath:spring-dao.xml"/>
    <import resource="classpath:spring-service.xml"/>
    <import resource="classpath:springmvc-servlet.xml"/>
</beans>

1.2 代码编写

项目结构
在这里插入图片描述

1.2.1 查询全部书籍

控制器：pers.tianyu.controller.BookController

package pers.tianyu.controller;

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.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import pers.tianyu.pojo.Books;
import pers.tianyu.service.BookService;

import java.util.List;

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

    private BookService bookService;

    @Autowired
    @Qualifier(value = "bookService")
    public void setBookService(BookService bookService) {
        this.bookService = bookService;
    }

}

BookController 类编写，查询全部书籍

//查询全部书籍信息，并返回到一个书记展示页面
@RequestMapping("/allBook")
public String list(Model model) {
    List<Books> list = bookService.queryAllBook();
    model.addAttribute("list", list);
    return "allBook";
}

首页index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE HTML>
<head>
    <title>首页</title>
    <style>
    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
    </a>
</h3>
</body>
</html>

书籍列表页面 allBook.jsp（目录：WEB-INF\jsp\allBook.jsp）

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<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>
        <%--row clearfix表示不受其他样式控制,清除浮动--%>
        <div class="container">
            <div class="row clearfix">
                <div class="clo-md-12 column">
                    <div class="page-header">
                        <h1>
                            <small>书籍列表</small>
                        </h1>
                    </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 class="col-md-4 column">
		                <%--查询书籍--%>
		                <span style="color: red";font-weight:bold>
		                    	${msg}
		                </span>
		                <form class="form-inline" action="${pageContext.request.contextPath}/book/queryBook" method="post">
		                    <input type="text" name="queryBookName" class="form-control" placeholder="请输入要查询书籍的名称">
		                    <input type="submit" value="查询" class="btn btn-primary">
		                </form>
		            </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>
                            <th>书籍操作</th>
                        </tr>
                        </thead>
                        <%--书籍从数据库中查询出来,从这个List中遍历出来: foreach--%>
                        <tbody>
                        <c:forEach var="book" items="${list}">
                            <tr>
                                <td>${book.bookID}</td>
                                <td>${book.bookName}</td>
                                <td>${book.bookCounts}</td>
                                <td>${book.detail}</td>
                                <td>
                                    <a href="${pageContext.request.contextPath}/book/toUpdateBook/${book.bookID}">修改</a><br>
                                    <a href="${pageContext.request.contextPath}/book/del/${book.bookID}">删除</a>
                                </td>
                            </tr>
                        </c:forEach>
                        </tbody>
                    </table>
                </div>
            </div>
        </div>
    </body>
</html>

1.2.2 添加书籍

BookController 类编写，添加书籍

//跳转添加页面
@RequestMapping("/toAddBook")
public String toAddPaper(){
    return "addBook";
}

//添加书籍信息
@RequestMapping("/addBook")
public String addPage(Books books){
    bookService.addBook(books);
    return "redirect:/book/allBook";
}

添加书籍页面：addBook.jsp（目录：WEB-INF\jsp\addBook.jsp）

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<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">
       <div class="form-group">
         <label for="bkname">书籍名称:</label>
         <input type="text" name="bookName" id="bkname" required /><br><br><br>
       </div>
       <div class="form-group">
         <label for="bkcounts">书记数量:</label>
         <input type="text" name="bookCounts" id="bkcounts" required /><br><br><br>
       </div>
       <div class="form-group">
         <label for="bkdetail">书记详情:</label>
         <input type="text" name="detail" id="bkdetail" required /><br><br><br>
       </div>
       <input type="submit" value="添加">
     </form>
    </div>
  </body>
</html>

1.2.3 删除书籍

BookController 类编写，删除书籍

//删除书籍 RestFull风格
@RequestMapping("/del/{bookID}")
private String deleteBook(@PathVariable("bookID") int id){
    bookService.deleteBookById(id);
    return "redirect:/book/allBook";
}

1.2.4 修改书籍

BookController 类编写，修改书籍

//修改前信息回显 RestFull风格
@RequestMapping("/toUpdateBook/{bookID}")
public String toUpdateBook(Model model,@PathVariable("bookID") int id){
    Books books = bookService.queryBookById(id);
    model.addAttribute("book",books);
    return "updateBook";
}

//修改书籍信息
@RequestMapping("/updateBook")
public String updateBook(Model model,Books books){
    bookService.updateBook(books);
    return "redirect:/book/allBook";
}

修改书籍页面 updateBook.jsp（目录：WEB-INF\jsp\updateBook.jsp）

<%@ 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>修改书籍</small>
                        </h1>
                    </div>
                </div>
            </div>
            <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
                <input type="hidden" name="bookID" value="${book.getBookID()}"/>
                <div class="form-group">
                    <label for="bkname">书籍名称:</label>
                    <input type="text" name="bookName" id="bkname" value="${book.getBookName()}" required /><br><br><br>
                </div>
                <div class="form-group">
                    <label for="bkcounts">书记数量:</label>
                    <input type="text" name="bookCounts" id="bkcounts" value="${book.getBookCounts()}" required /><br><br><br>
                </div>
                <div class="form-group">
                    <label for="bkdetail">书记详情:</label>
                    <input type="text" name="detail" id="bkdetail"  value="${book.getDetail()}" required /><br><br><br>
                </div>
                <input type="submit" value="保存"/>
            </form>
        </div>
    </body>
</html>

1.2.5 搜索书籍

BookController 类编写，搜索书籍

// 查询书籍
@RequestMapping("/queryBook")
public String queryBook(String queryBookName,Model model){
    List<Books> list = bookService.queryBookByName(queryBookName);
    if(list.isEmpty()){
        model.addAttribute("msg","未查到");
    }else {
        model.addAttribute("list",list);
    }
    return "allBook";
}