我的架构梦：（十）手写并整合ssm框架（Spring+SpringMVC+MyBatis）
手写并整合ssm框架（Spring+SpringMVC+MyBatis）
- 一、前言
- 二、MyBatis整合Spring
- 三、 整合SpringMVC
- 四、代码仓库
一、前言
前面我们手写过Spring、SpringMVC、MyBatis框架了，没有看过的小伙伴可以点击下面的链接：
我的架构梦：（一）手写MyBatis框架
我的架构梦：（五）Spring框架中的IoC容器源码分析（上）
我的架构梦：（六）Spring框架中的IoC容器源码分析（下）
我的架构梦：（七）Spring框架中的AOP源码分析
我的架构梦：（八）手写SpringMVC框架
我们今天整合的策略如下：
SSM = Spring + SpringMVC + MyBatis = (Spring + MyBatis) + SpringMVC
先整合 Spring + MyBatis
然后再整合 SpringMVC
基于的需求：查询 Account 表的全部数据显示到前端⻚面
二、MyBatis整合Spring
1、整合目标
- 数据库连接池以及事务管理都交给
Spring容器来完成 SqlSessionFactory对象应该放到Spring容器中作为单例对象管理Mapper动态代理对象交给Spring管理，我们从Spring容器中直接获得Mapper的代理对象
2、整合所需 Jar 分析
- Junit测试jar(4.12版本)
- Mybatis的jar(3.4.5)
- Spring相关jar(spring-context、spring-test、spring-jdbc、spring-tx、spring-aop、 aspectjweaver)
- Mybatis/Spring整合包jar(mybatis-spring-xx.jar)
- Mysql数据库驱动jar
- Druid数据库连接池的jar
3、整合的pom文件
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.12version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.4.5version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>5.1.12.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<version>5.1.12.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>5.1.12.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-txartifactId>
<version>5.1.12.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aopartifactId>
<version>5.1.12.RELEASEversion>
dependency>
<dependency>
<groupId>org.aspectjgroupId>
<artifactId>aspectjweaverartifactId>
<version>1.8.9version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>2.0.3version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>8.0.19version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>1.1.21version>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<version>1.18.12version>
<scope>providedscope>
dependency>
4、jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring
jdbc.username=root
jdbc.password=root
5、Spring 配置文件 applicationContext.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
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
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
">
<context:component-scan base-package="com.riemann.service"/>
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="typeAliasesPackage" value="com.riemann.pojo"/>
<property name="dataSource" ref="dataSource"/>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.riemann.mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
bean>
beans>
6、AccountMapper接口
public interface AccountMapper {
// 定义dao层接口方法
List<Account> queryAccountList() throws Exception;
}
7、AccountMapper.xml
<mapper namespace="com.riemann.mapper.AccountMapper">
<select id="queryAccountList" resultType="com.riemann.pojo.Account">
select * from account;
select>
mapper>
8、测试程序
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath*:application*.xml"}) // 不用手动去启动一个容器了
public class MybatisSpringTest {
// 希望测试ioc容器中的哪个对象你注入即可。
@Autowired
private AccountService accountService;
@Test
public void testMybatisSpring() throws Exception{
List<Account> accounts = accountService.queryAccountList();
System.out.println(accounts);
}
}
查询的信息成功，这样一来，也就说明我们MyBatis整合Spring成功了，接下来在此基础上整合SpringMVC。
三、 整合SpringMVC
1、整合思路
把SpringMVC的入⻔案例整合进来即可(在已有工程基础之上开发一个SpringMVC入⻔案例)
2、pom.xml依赖
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>5.1.12.RELEASEversion>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>jsp-apiartifactId>
<version>2.0version>
<scope>providedscope>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>3.1.0version>
<scope>providedscope>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-coreartifactId>
<version>2.9.0version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>2.9.0version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-annotationsartifactId>
<version>2.9.0version>
dependency>
3、springmvc.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
">
<context:component-scan base-package="com.riemann.controller"/>
<mvc:annotation-driven/>
beans>
4、Controller类
@Controller
@RequestMapping("/account")
public class AccountController {
/**
* Spring容器和SpringMVC容器是有层次的(父子容器)
* Spring容器:service对象+dao对象
* SpringMVC容器:controller对象,可以引用到Spring容器中的对象。
*/
@Autowired
private AccountService accountService;
@RequestMapping("/queryAll")
@ResponseBody
public List<Account> queryAll() throws Exception {
return accountService.queryAccountList();
}
}
5、web.xml
<web-app>
<display-name>Archetype Created Web Applicationdisplay-name>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath*:applicationContext.xmlparam-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
<servlet>
<servlet-name>springmvcservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath*:springmvc.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>springmvcservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
web-app>
6、测试
插件启动成功后，访问 http://localhost:8888/account/queryAll
前端页面显示出相应的数据，这样一来我们手写并整合ssm成功！！！
四、代码仓库
https://github.com/riemannChow/perseverance/tree/master/handwriting-framework/ssm