SSM整合

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1. 创建web项目

创建maven工程

修改pom文件

<packaging>war</packaging>

完成maven工程web项目结构
添加web项目依赖

<dependencies>
    <!-- https://mvnrepository.com/artifact/javax.servlet/jsp-api -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.0</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>4.0.1</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

配置服务器运行环境（Tomcat）

2. 在项目中部署MyBatis

添加MyBatis依赖

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.31</version>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.5.5</version>
</dependency>
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.26</version>
    <scope>provided</scope>
</dependency>

创建MyBatis配置文件: resources下创建 mybatis-config.xml

3. 部署Spring、SpringMVC

3.1 添加依赖

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aspects</artifactId>
    <version>5.3.29</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>5.3.29</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.3.29</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>5.3.29</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>5.3.29</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.3.29</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.15.1</version>
</dependency>

3.2 创建Spring配置文件(多配置文件分开配置)

spring-context.xml 只配置注解声明,以及类的管理

<?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/context  
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans.xsd">
<!--    使用注解-->
    <context:annotation-config/>
<!--    注解扫描范围-->
    <context:component-scan base-package="com.xie"/>
</beans>

spring-mvc.xml进行mvc相关的配置，例如静态资源配置，拦截器配置等

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">
<!--    MVC使用注解配置-->
    <mvc:annotation-driven/>

    <mvc:resources mapping="/js/**" location="/js/"/>

</beans>

spring-mybatis.xml进行spring与MyBatis整合相关的配置

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

3.3 配置SpringMVC前端控制器

在web.xml配置，注意 classpath:spring-*.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">
    <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-*.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>
</web-app>

4. 整合配置

4.1 IoC整合配置

4.1.1 导入mybatis-spring依赖

<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>3.0.2</version>
</dependency>

4.1.2 配置 druid 连接池

添加druid依赖

<dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.2.16</version>
    </dependency>

创建druid.properties 并配置

druid.driver=com.mysql.cj.jdbc.Driver
druid.url=jdbc:mysql://localhost:3306/SSM?characterEncoding=utf-8&amp;useSSL=false
druid.username=user
druid.password=12345

druid.pool.init=1
druid.pool.minIdle=3
druid.pool.maxActive=20
druid.pool.timeout=30000

在 spring-mybatis.xml 配置数据源

    <contetx:property-placeholder location="classpath:druid.properties"/>
    <bean id="druidDataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${druid.driver}"></property>
        <property name="url" value="${druid.url}"></property>

        <property name="initialSize" value="${druid.pool.init}"></property>
        <property name="username" value="${druid.username}"></property>
        <property name="password" value="${druid.password}"></property>
        <property name="minIdle" value="${druid.pool.minIdle}"></property>
        <property name="maxActive" value="${druid.pool.maxActive}"></property>
        <property name="maxWait" value="${druid.pool.timeout}"></property>
    </bean>
</beans>

4.1.3 配置SqlSessionFactory

在 spring-mybatis.xml 中配置

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="druidDataSource"/>
    <property name="mapperLocations" value="classpath:mappers/*.xml"/>
    <property name="typeAliasesPackage" value="com.xie.bean"/>
    <property name="configLocation" value="classpath:mybatis-config.xml"/>
 </bean>

4.1.4 配置MapperScnnerConfigurer

在spring-mybatis.xml配置

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    <property name="basePackage" value="com.xie.dao"/>
</bean>

5. 整合配置（AOP）

使用Spring提供的事务管理完成DAO操作的事务管理

基于注解的事务管理配置

将Spring提供的事务管理切面类配置到Spring容器

xmlns:tx="http://www.springframework.org/schema/tx"
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="druidDataSource"/>
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>

6.单元测试（Dao，Service）

6.1 完成User的查询操作

创建实体类

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;

@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString
public class User {
    private int userId;
    private String userName;
    private String userPwd;
    private String userRealname;
    private String userImg;
}

在DAO包中创建接口

public interface UserDAO {
    public User queryUserByName(String name);
}

在Mappers目录下创建映射文件 UserMapper.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.xie.dao.UserDAO">

    <resultMap id="userMap" type="User">
        <id column="user_id" property="userId"/>
        <id column="user_name" property="userName"/>
        <id column="user_pwd" property="userPwd"/>
        <id column="user_realname" property="userRealname"/>
        <id column="user_img" property="userImg"/>
    </resultMap>

    <select id="queryUserByName" resultMap="userMap">
        select user_id, user_name, user_pwd, user_realname, user_img
        from users
        where user_name=#{userNmae}
    </select>
</mapper>

6.2 对DAO单元测试

添加对 junit 和 spring-test 依赖

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.13.1</version>
    <scope>test</scope>
</dependency>

创建测试类

<dependency>
    <groupId>javax.annotation</groupId>
    <artifactId>javax.annotation-api</artifactId>
    <version>1.3.2</version>
</dependency>

SSM--SSM整合

SSM整合

1. 创建web项目

2. 在项目中部署MyBatis

3. 部署Spring、SpringMVC

3.1 添加依赖

3.2 创建Spring配置文件(多配置文件分开配置)

3.3 配置SpringMVC前端控制器

4. 整合配置

4.1 IoC整合配置

4.1.1 导入mybatis-spring依赖

4.1.2 配置 druid 连接池

4.1.3 配置SqlSessionFactory

4.1.4 配置MapperScnnerConfigurer

5. 整合配置（AOP）

6.单元测试（Dao，Service）

6.1 完成User的查询操作

6.2 对DAO单元测试