---

镇楼

本次整合做的是图书的增删改查

一、基本流程

二、ssm整合

1.数据库

1.1创建数据库

1创建数据库ssmbuild

//创建数据库
CREATE DATABASE ssmbuild
//切换数据库
USE ssmbuild;

1.2建表

//如果数据库中存在books表，就把它从数据库中drop掉。
DROP TABLE IF EXISTS books;

//CREATE TABLE 建表   not null不能为空  COMMENT 是备注、注释的意思
//auto_increment 自增   Engine =innodb default charset=utf8 默认编码字符集
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',
    -> PRIMARY KEY (bookId))
    -> Engine =innodb default charset=utf8;
//插入信息
 insert into books (bookId,bookName,bookCounts,detail) values
     (1,'java',1,'重入门到放弃'),
     (2,'mysql',10,'重删库到跑路'),
     (3,'javaScript',20,'从进门就出逃');

books表：

2.新建一Maven项目！

2.1、导入相关的pom依赖！

<dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
        </dependency>
        <!--数据库驱动-->
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.26</version>
        </dependency>
        <!-- 数据库连接池 -->
        <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.6</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-->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.7</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>
        <!--Spring-->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.10</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.10</version>
        </dependency>
    </dependencies>

2.2、查看链接数据库

根据字节的数据库来

测试成功：

选中创建的数据库，楼主已经建好就不建了。

查看我们建立的数据库表：记得刷新

2.3、Maven资源过滤设置

<build>
   <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>

2.4、搭建基本的框架

基本架构

2.4.1、资源文件

2.4.2、mybatis-config.xml(楼主自用模板)

楼主自用的模板：

<?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>

<!--settings：控制mybatis全局行为，还有其他设置-->
<settings>
    <!--设置mybatis输出日志-->
    <setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>

<!--设置别名-->
<typeAliases>
    <!--name:实体类所在的包名-->
    <package name="com.opnelab.pojo"/>
</typeAliases>

</configuration>

2.4.3、applicationContext.xml(楼主自用模板)

本模板包含spring-dao和spring-service。可以直接用这个，或分开，然后导入过来。
楼主自用的模板：东西都是配好的改改就行 数据库参数名字相同的话能够直接用

<?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:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"

       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
">

    <!-- 1.配置数据源 -->
    <!--    关联数据库配置文件-->
    <context:property-placeholder location="classpath:database.properties"></context:property-placeholder>
    <!-- 1.配置数据源 -->
    <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
        <!-- 数据库驱动 -->
        <property name="driverClassName" value="${jdbc.driverClassName}"></property>
        <!--连接数据库的url -->
        <property name="url" value="${jdbc.url}"></property>
        <!--连接数据库的用户名 -->
        <property name="username" value="${jdbc.username}"></property>
        <!--连接数据库的密码 -->
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--    声明的是mybatis中提供的SqlSessionFactoryBean类,这个给类内部创建SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--        mybatis主配置文件的位置
                configLocation是Resource类型,读取配置文件
                它的复制，使用value，指定文件路径，使用的是classpath:文件路径-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <property name="mapperLocations" value="classpath*:com/openlab/dao/BookMapper.xml"></property>
    </bean>

    <!--    创建dao对象,使用sqlSession的getMapper(UserDao.class)
             MapperScannerConfigurer:内部调用getMapper()生成每个Dao的代理对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--        指定qlSessionFactory对象的name-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--        指定包名,名字是dao接口所在的的包名
        MapperScannerConfigurer会扫描这个包所有的接口,把每个接口执行一次getMapper()方法得到每个dao对象.
        创建好的对象放入到Spring容器中-->
        <property name="basePackage" value="com.openlab.dao"/>
    </bean>
    <!--    扫描器:扫描指定的包-->
    <context:component-scan base-package="com.openlab"/>

    <!--    Spring事物 注解实现-->
    <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
    <bean id="transactionManager" class="org.springframework.jdbc.support.JdbcTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

</beans>

applicationContext.xml：这里没截图到就在网上找的：

2.4.4、database.properties(楼主自用模板)

jdbc.driverClassName=com.mysql.cj.jdbc.Driver
#//mysql8版本:  leopard?useUnicode=true&characterEncoding=UTF8&useSSL=false&serverTimezone=Asia/Shanghai
#//useSSL=true 安全连接   useUnicode=true&characterEncoding=utf8编码字符集
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root

2.5、创pojo

2.5.1、package com.openlab.pojo;

package com.openlab.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
    private int bookId;
    private String bookName;
    private String bookCount;
    private int detail;
}

在pom文件中添加了注解包：

<!--        注解-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>RELEASE</version>
            <scope>compile</scope>
        </dependency>

2.5.2、创建BookMapper

创建接口BookMapper

package com.openlab.dao;

import com.openlab.pojo.Books;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface BookMapper {
    //增加一本书
    int addBook(Books book);
    //删除一本书
    int deleteBookById(@Param("bookId") int id);
    //更新一本书
    int updateBooks(Books books);
    //查询一本书
    Books queryBookById(int id);
    //查询全部的书
    List<Books> queryAllBook();
}

2.5.3、创建对应的Mapper.xml

一个Mapper对应一个接口

楼主的Mapper.xml模板

<?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="">
</mapper>

楼主写的对应的BookMapper.xml

<?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.openlab.dao.BookMapper">
<!--添加一本书           parameterType参数类型-->
    <insert id="addBook" parameterType="com.openlab.pojo.Books">
        insert into ssmbuild.books (bookName, bookCounts, detail)
        values (#{bookName},#{bookCounts},#{detail};
    </insert>
<!--    删除一本书-->
    <delete id="deleteBookById" parameterType="java.lang.Integer">
        delete from ssmbuild.books where bookId=#{bookId};
    </delete>
<!--    //更新一本书-->
    <update id="updateBooks" parameterType="com.openlab.pojo.Books" >
        update ssmbuild.books
            set  bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}
        where bookId=#{bookId} ;
    </update>
<!--    //查询一本书 resultType="com.openlab.pojo.Books"  返回类型参数-->
    <select id="queryBookById"  resultType="com.openlab.pojo.Books" parameterType="java.lang.Integer">
        select * from ssmbuild.books where bookId=#{bookId};
    </select>
<!--    //查询全部的书-->
    <select id="queryAllBook"  resultType="com.openlab.pojo.Books" >
        select * from ssmbuild.books ;
    </select>
</mapper>

2.6、业务层Service

2.6.1、业务也是dao里面操作

package com.openlab.service;
import com.openlab.pojo.Books;
import java.util.List;
public interface BookServie {
    //增加一本书
    int addBook(Books book);
    //删除一本书
    int deleteBookById(int id);
    //更新一本书
    int updateBooks(Books book);
    //查询一本书
    Books queryBookById(int id);
    //查询全部的书
    List<Books> queryAllBook();
}

2.6.2、业务层的实现类

创建实现类的包

BookServiceImpl 类

package com.openlab.service.Impl;

import com.openlab.dao.BookMapper;
import com.openlab.pojo.Books;
import com.openlab.service.BookServie;
import lombok.Setter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
@Setter
@Service
public class BookServiceImpl implements BookServie {
//    用业务层掉dao层。
    @Autowired
    private  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 updateBooks(Books book) {
        return bookMapper.updateBooks(book);
    }

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

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

2.7、Spring层

2.7.1、配置Spring整合MyBatis，我们这里数据源使用druid连接池；

2.7.2、我们去编写Spring整合Mybatis的相关的配置文件；spring-dao.xml(楼主自用模板)

楼主给的模板都给你们配好了 改改参数就ok 楼主用的druid连接池。
也就是楼主给的applicationContext.xml模板

<?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:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"

       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
">

    <context:property-placeholder location="classpath:database.properties"></context:property-placeholder>
    <!-- 1.配置数据源 -->
    <!--    关联数据库配置文件-->
    <context:property-placeholder location="classpath:database.properties"></context:property-placeholder>
    <!-- 1.配置数据源 -->
    <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
        <!-- 数据库驱动 -->
        <property name="driverClassName" value="${jdbc.driverClassName}"></property>
        <!--连接数据库的url -->
        <property name="url" value="${jdbc.url}"></property>
        <!--连接数据库的用户名 -->
        <property name="username" value="${jdbc.name}"></property>
        <!--连接数据库的密码 -->
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--    声明的是mybatis中提供的SqlSessionFactoryBean类,这个给类内部创建SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--        mybatis主配置文件的位置
                configLocation是Resource类型,读取配置文件
                它的复制，使用value，指定文件路径，使用的是classpath:文件路径-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!--    创建dao对象,使用sqlSession的getMapper(UserDao.class)
             MapperScannerConfigurer:内部调用getMapper()生成每个Dao的代理对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--        指定qlSessionFactory对象的name-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--        指定包名,名字是dao接口所在的的包名
        MapperScannerConfigurer会扫描这个包所有的接口,把每个接口执行一次getMapper()方法得到每个dao对象.
        创建好的对象放入到Spring容器中-->
        <property name="basePackage" value="com.openlab.dao"/>
    </bean>
    <!--    扫描器:扫描指定的包-->
    <context:component-scan base-package="com.openlab"/>

    <!--    Spring事物 注解实现-->
    <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
    <bean id="transactionManager" class="org.springframework.jdbc.support.JdbcTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
</beans>

2.7.3、applicationContext.xml分离数据库链接spring-dao.xml以及Spring-servoice.xml

为了代码的可读性讲数据库链接分离出来 applicationContext.xml就为空

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"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"

       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
">

    <!-- 1.配置数据源 -->
    <!--    关联数据库配置文件-->
    <context:property-placeholder location="classpath:database.properties"></context:property-placeholder>
    <!-- 1.配置数据源 -->
    <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
        <!-- 数据库驱动 -->
        <property name="driverClassName" value="${jdbc.driverClassName}"></property>
        <!--连接数据库的url -->
        <property name="url" value="${jdbc.url}"></property>
        <!--连接数据库的用户名 -->
        <property name="username" value="${jdbc.username}"></property>
        <!--连接数据库的密码 -->
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--    声明的是mybatis中提供的SqlSessionFactoryBean类,这个给类内部创建SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--        mybatis主配置文件的位置
                configLocation是Resource类型,读取配置文件
                它的复制，使用value，指定文件路径，使用的是classpath:文件路径-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <property name="mapperLocations" value="classpath*:com/openlab/dao/BookMapper.xml"></property>
    </bean>

    <!--    创建dao对象,使用sqlSession的getMapper(UserDao.class)
             MapperScannerConfigurer:内部调用getMapper()生成每个Dao的代理对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--        指定qlSessionFactory对象的name-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--        指定包名,名字是dao接口所在的的包名
        MapperScannerConfigurer会扫描这个包所有的接口,把每个接口执行一次getMapper()方法得到每个dao对象.
        创建好的对象放入到Spring容器中-->
        <property name="basePackage" value="com.openlab.dao"/>
    </bean>
</beans>

Spring-servoice.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:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"

       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
">

    <!--    扫描器:扫描指定的包-->
    <context:component-scan base-package="com.openlab.service"/>

    <!--    Spring事物 注解实现-->
    <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
    <bean id="transactionManager" class="org.springframework.jdbc.support.JdbcTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>


</beans>

Spring-servoice.xml关联spring-dao.xml

爆红的话关联一下：

或者以下 能达到同样的效果

<import resource="Spring-dao.xml" />

BookServiceImpl中之前写的时候就可以直接注释,就不用在Spring-servoice.xml中导入

2.8、SpringMVC层

2.8.1、增加web支持

2.8.2、配置web.xml文件(楼主自用模板)

<?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">
    <!--    注册DispatcherServlet-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--        关联一个Springmvc的配置文件：-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc-servlet.xml</param-value>
        </init-param>
        <!--        启动级别  立即加载-->
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!--    匹配所有请求: /（不包括jsp）-->
    <!--    匹配所有请求: /*（包括jsp）-->
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

<!--    乱码过滤-->
    <filter>
        <filter-name>encodingFilter</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>encodingFilter</filter-name>
        <url-pattern>*</url-pattern>
    </filter-mapping>
<!--    session-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>

2.8.2、配置spring-mvc.xml文件(楼主自用模板)

<?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-->
    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！-->
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--encodingFilter-->
    <filter>
        <filter-name>encodingFilter</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>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--Session过期时间-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>

2.8.3、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">

    <import resource="classpath:spring/spring-dao.xml"/>
    <import resource="classpath:spring/spring-service.xml"/>
    <import resource="classpath:spring/springmvc-servlet.xml"/>

</beans>

2.8.4、创建jsp文件夹

2.8.5、Controller

Controller

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

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

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

2.8.5、index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE HTML>
<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>

2.8.6、allBook.jsp

<%@ page import="org.springframework.ui.Model" %><%--
  Created by IntelliJ IDEA.
  User: xiaoyaoge
  Date: 2021/9/21
  Time: 11:16
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    ${list}
</body>
</html>

运行结果

3、楼主模板：保存下 下次直接拿来改

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"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"

       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
">

    <!-- 1.配置数据源 -->
    <!--    关联数据库配置文件-->
    <context:property-placeholder location="classpath:database.properties"></context:property-placeholder>
    <!-- 1.配置数据源 -->
    <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
        <!-- 数据库驱动 -->
        <property name="driverClassName" value="${jdbc.driverClassName}"></property>
        <!--连接数据库的url -->
        <property name="url" value="${jdbc.url}"></property>
        <!--连接数据库的用户名 -->
        <property name="username" value="${jdbc.username}"></property>
        <!--连接数据库的密码 -->
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--    声明的是mybatis中提供的SqlSessionFactoryBean类,这个给类内部创建SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--        mybatis主配置文件的位置
                configLocation是Resource类型,读取配置文件
                它的复制，使用value，指定文件路径，使用的是classpath:文件路径-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <property name="mapperLocations" value="classpath*:com/openlab/dao/BookMapper.xml"></property>
    </bean>

    <!--    创建dao对象,使用sqlSession的getMapper(UserDao.class)
             MapperScannerConfigurer:内部调用getMapper()生成每个Dao的代理对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--        指定qlSessionFactory对象的name-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--        指定包名,名字是dao接口所在的的包名
        MapperScannerConfigurer会扫描这个包所有的接口,把每个接口执行一次getMapper()方法得到每个dao对象.
        创建好的对象放入到Spring容器中-->
        <property name="basePackage" value="com.openlab.dao"/>
    </bean>
</beans>

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:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"

       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
">

    <!--    扫描器:扫描指定的包-->
    <context:component-scan base-package="com.openlab.service"/>

    <!--    Spring事物 注解实现-->
    <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
    <bean id="transactionManager" class="org.springframework.jdbc.support.JdbcTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
</beans>

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
        http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!--不用注解导包-->
    <!--    <bean id="/hello" class="com.openlab.controller.HelloController" />-->
    <!--     处理器映射器 -->
    <!--    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" />-->
    <!--    Adapter适配    HandlerAdapter处理器适配器：适配相应的处理器-->
    <!--    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />-->


    <!--   注解     自动扫描包，让包下的注解生效，由IOC容器统一管理-->
    <context:component-scan base-package="com.openlab.controller"/>
    <!--    让SpringMVC不处理静态资源   .css .js .html .mp4-->
    <mvc:default-servlet-handler/>
    <!--    支持MVC注解驱动-->
    <!--            在Spring中一般采用@RequestMapping注解完成映射关系-->
    <!--            想要使@RequestMapping生效-->
    <!--            必须上下文中注册DefaultAnnotationHandlerMapping-->
    <!--            和一个AnnotationMethodHandlerAdaapter实例-->
    <!--            这两个是分别在类级别和方法级别处理-->
    <!--            而Annotation-driver配置帮助我们自动完成上述两个实例的注入-->
    <mvc:annotation-driven/>


    <!--    视图解析器DisplatcherServlet 给他的ModelAbdView-->
    <!--    获取了ModeAndeView是数据-->
    <!--    解析ModeAndView视图的名字-->
    <!--    拼接视图的名字找到相应的视图  hello-->
    <!--    将数据渲染到视图上-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <!--        前缀-->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!--        后缀-->
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

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">
</beans>

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>

<!--settings：控制mybatis全局行为，还有其他设置-->
<settings>
    <!--设置mybatis输出日志-->
    <setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>

<!--设置别名-->
<typeAliases>
    <!--name:实体类所在的包名-->
    <package name="com.opnelab.pojo"/>
</typeAliases>


</configuration>

database.properties

jdbc.driverClassName=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root

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">
    <!--DispatcherServlet-->
    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！-->
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--encodingFilter-->
    <filter>
        <filter-name>encodingFilter</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>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--Session过期时间-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>

！！！！看过来看过来！！！

看完觉得有用的大大们！！！！！