一，项目搭建准备

1，准备数据库

2，基本环境搭建

导入相关的依赖

3，maven资源过滤

4，建立项目相关结构、包

pojo的实体类包 dao的数据库交互包 service的业务层包 controller的控制器包 mybatis的配置文件：mybatis-config.xml spring的配置文件：applicationContext.xml

二，mybatis层

1，编写数据库的配置文件database.properties

jdbc.driver=com.mysql.cj.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/user?serverTimezone=GMT%2B8 jdbc.username=root jdbc.password=root

2，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> <!--配置数据源，交给spring去做--> <typeAliases> <package name="com.star.pojo"/> </typeAliases> <mappers> <mapper class="com.star.dao.BookMapper"></mapper> </mappers> </configuration>

3，编写数据库对应的实体类

package com.kuang.pojo; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; @Data @AllArgsConstructor @NoArgsConstructor public class Books { private int bookID; private String bookName; private int bookCounts; private String detail; }

4，编写dao层的mapper接口

public interface BookMapper { //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 books); //根据id查询,返回一个Book Books queryBookById(int id); //查询全部Book,返回list集合 List<Books> queryAllBook(); }

5，编写dao层的mapper对应的配置文件

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.star.dao.BookMapper"> <insert id="addBook" parameterType="Books"> insert into ssmbuild.books (bookName,bookCounts,detail) values (#{bookName},#{bookCounts},#{detail}) </insert> <delete id="deleteBookById" parameterType="int"> delete from ssmbuild.books where bookId = #{bookId} </delete> <update id="updateBook" parameterType="Books"> update ssmbuild.books set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail} where bookID=#{bookID} </update> <select id="queryBookById" resultMap="Books"> select * from ssmbuild.books where bookID=#{bookId} </select> <select id="queryAllBook" resultMap="Books"> select * from ssmbuild.books </select> </mapper>

6，编写service层的接口和实现类

接口：

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

实现类：

package com.star.service; import com.star.dao.BookMapper; import com.star.pojo.Books; import java.util.List; public class BookServiceImpl implements BookService{ //service调dao : 组合dao 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(); } }

三，spring层

1，spring整合mybatis的配置文件

<?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，关联数据库配置文件--> <context:property-placeholder location="classpath:database.properties"></context:property-placeholder> <!--2，连接池 dbcp: 半自动化操作，不能自动连接， c3p0: 自动化操作，自动化的加载配置文件，自动设置到对象中 druid: hikari: --> <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="${jdbc.username}"></property> <property name="password" value="${jdbc.password}"></property> <!-- 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"> <property name="dataSource" ref="datasource"></property> <!--绑定mybatis的配置文件--> <property name="configLocation" value="classpath:mybatis-config.xml"></property> </bean> <!--配置dao接口扫描包，动态的实现了dao接口可以注入到spring容器中--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!--注入sqlSessionFactory--> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!--要扫描的包--> <property name="basePackage" value="com.star.dao"/> </bean> </beans>

2，spring整合service的配置文件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" 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下的包--> <context:component-scan base-package="com.star.service"/> <!--将我们的所有业务类注入到spring，可以通过配置或者注解实现--> <bean id="BookServiceImpl" class="com.star.service.BookServiceImpl"> <property name="bookMapper" ref="bookMapper"></property> </bean> <!--声明式事务控制--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="datasource"></property> </bean> </beans>

四，SpringMVC层

1，核心配置文件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"> <!--DispatchServlet--> <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:spring-mvc.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>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，配置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: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 http://www.springframework.org/schema/mvc/spring-cache.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <!--注解驱动--> <mvc:annotation-driven></mvc:annotation-driven> <!--静态资源过滤--> <mvc:default-servlet-handler></mvc:default-servlet-handler> <!--扫描包：controller--> <context:component-scan base-package="com.star.controller"></context:component-scan> <!--视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> </beans>

3，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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <import resource="spring-dao.xml"></import> <import resource="spring-service.xml"></import> <import resource="spring-mvc.xml"></import> </beans>