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02.maven分模块构建ssm

02.maven分模块构建ssm

作者: 哈哈大圣 | 来源:发表于2019-02-17 13:49 被阅读313次

    maven分模块构建ssm项目

    开发工具使用idea;由于内容有点多，很多地方就不用图文解释了；相信读者能选择看此篇文章，idea构建maven普通工程等知识肯定已经烂熟于胸了。

    一、数据库环境准备

    这里以MySQL数据库为例;

    -- 准备数据库环境
CREATE DATABASE maven;
USE maven;
SET FOREIGN_KEY_CHECKS=0;
DROP TABLE IF EXISTS `items`;
CREATE TABLE `items` (
  `id` INT(10) NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(20) DEFAULT NULL,
  `price` FLOAT(10,0) DEFAULT NULL,
  `pic` VARCHAR(40) DEFAULT NULL,
  `createtime` DATETIME DEFAULT NULL,
  `detail` VARCHAR(200) DEFAULT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=INNODB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8;

INSERT INTO `items` VALUES
    ('1', '面壁计划', '1000', NULL, '2018-03-13 09:29:30', '带我走上人生巅峰'),
    ('2', '程心', NULL, NULL, '2018-03-28 10:05:52', '插入测试'),
    ('3', '降维打击', '199', NULL, '2018-03-07 10:08:04', '插入测试'),
    ('7', '黑暗森林', NULL, NULL, NULL, NULL),
    ('8', '三体', NULL, NULL, NULL, NULL);
----------------------------------

    二、创建父工程

    1). 使用骨架创建maven工程/模块

    1. 骨架名: org.apache.maven.archetypes:maven-archetype-site
    2. GroupId: com.itheima 公司域名
    3. Artifactid: B_maven_ssm_parent 父工程项目名
    4. 注意maven的配置，使用本地仓库的配置 (建议配置阿里云镜像)
    5. 注意父工程的pom.xml中的打包方式为 pom
    6. 父工程只需要一个pom.xml文件，可以将其他文件夹删除掉 (千万别删 .imi 文件，这个是idea工具的配置文件，删了此工程就白建了)

    2). 父工程项目结构

    父工程结构.png

    3). 配置jar包坐标，锁定依赖，指定jdk编译版本以及tomcat7插件版本

    1.【注意】

    1. 实际生产时可以将下面的配置方式直接拷贝使用。
    2. 如果项目中需要使用到新技术需要导入新的坐标，一定要查看该 maven工程依赖关系图 看是否有jar包冲突，如果有要及时解决掉，否则项目可能会出现问题！

    2. 方式①: 【推荐】

    <?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <!--  @@@@@@@@@@@@ 开始：此部分要根据实际项目生成，不要盲目copy @@@@@@@@@@@@@@ -->
    <groupId>com.itheima</groupId>
    <artifactId>B_maven_ssm_parent</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>ssm_dao</module>
        <module>ssm_service</module>
        <module>ssm_web</module>
    </modules>
    <!--  @@@@@@@@@@@@ 结束：  @@@@@@@@@@@@@@ -->

    <!-- 统一管理jar包版本 -->
    <properties>
        <spring.version>5.0.2.RELEASE</spring.version>
        <slf4j.version>1.6.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
        <shiro.version>1.2.3</shiro.version>
        <mysql.version>5.1.6</mysql.version>
        <mybatis.version>3.4.5</mybatis.version>
        <spring.security.version>5.0.1.RELEASE</spring.security.version>
    </properties>

    <!-- 锁定jar包版本 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-web</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-tx</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>${mybatis.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <!-- 项目依赖jar包 -->
    <dependencies>
        <!-- spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.8</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- log start -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <!-- log end -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-web</artifactId>
            <version>${spring.security.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
            <version>${spring.security.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-core</artifactId>
            <version>${spring.security.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-taglibs</artifactId>
            <version>${spring.security.version}</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.9</version>
        </dependency>
    </dependencies>
    <!-- 添加tomcat7插件 -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.7.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

    3. 方式②: (参考) 值提供依赖

    <properties>
    <spring.version>5.0.2.RELEASE</spring.version>
    <springmvc.version>5.0.2.RELEASE</springmvc.version>
    <mybatis.version>3.4.5</mybatis.version>
</properties>
<dependencyManagement>
<dependencies>
<!-- Mybatis -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>${mybatis.version}</version>
</dependency>
<!-- springMVC -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>${springmvc.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${spring.version}</version>
</dependency>
<!-- spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-expression</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aspects</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context-support</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>${spring.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- Mybatis 和mybatis 与 spring 的整合 -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.3.1</version>
</dependency>
<!-- MySql驱动 -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.32</version>
</dependency>
<!-- druid数据库连接池 -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.0.9</version>
</dependency>
<!-- springMVC -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>${springmvc.version}</version>
</dependency>
<!-- spring 相关 -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-expression</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aspects</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context-support</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
</dependency>
<!-- spring 相关 事务相关 -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
</dependency>
<!-- junit测试 -->
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.0</version>
        <scope>provided</scope>
    </dependency>
    <!-- jstl -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <target>1.8</target>
                <source>1.8</source>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.tomcat.maven</groupId>
            <artifactId>tomcat7-maven-plugin</artifactId>
            <version>2.2</version>
        </plugin>
    </plugins>
</build>

    4). 发布

    父工程创建完成执 install 命令将父工程发布到仓库方便子工程继承：

    install.png

    三、创建ssm_dao层模块

    1). 不使用骨架创建ssm_dao层模块

    1. 在idea左侧项目结构父工程上右击创建maven模块
    2. 跳过骨架选择，直接next
    3. 默认继承父工程，别修改，填写模块名即可 ssm_dao next
    4. 注意目录结构，ssm_dao要在B_maven_ssm_parent下 finish

    2). 项目结构

    ssm_dao.png

    3). 代码以及配置文件

    1. 配置文件

    1. 配置ssm_dao的pom.xml

    注意，打包方式为jar包

    <artifactId>ssm_dao</artifactId>
<packaging>jar</packaging>

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
</dependencies>
    1. spring整合MyBatis的配置模块文件springContext-dao.xml
    <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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-4.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
        http://www.springframework.org/schema/util
        http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    <!-- @@@ 【整合MyBatis】 dao层@@@ %=开始=% -->
    <!-- 1. 配置数据源，使用阿里巴巴提供的数据连接池技术 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql:///maven"/>
        <property name="username" value="root"/>
        <property name="password" value="abc123"/>
    </bean>

     <!--2. 配置生产 多例线程安全的SqlSession对象 的工厂 【工厂模式】-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 配置数据源 -->
        <property name="dataSource" ref="dataSource"/>

        <!-- 配置需要扫描的pojo包，并给pojo对象起别名；就可以按照myBatis规
        定的别名取标识dao接口对应配置文件中需要使用的参数-->
        <property name="typeAliasesPackage" value="com.itheima.domain"/>
    </bean>

    <!-- 开启注解扫描，支持dao层注解开发，管理和dao -->
    <context:component-scan base-package="com.itheima.dao"/>
   
    <!-- 3. 配置接口的xml配置文件路径(发布环境下,接口和配置文件在同一个目录下),
     生成包下所有接口的代理对象，并且放入spring容器中
     -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.itheima.dao"/>
    </bean>
    <!-- @@@整合MyBatis dao层@@@ %=结束=% -->
</beans>

    1. 代码文件

    1. dao接口 ItemsDao
    package com.itheima.dao;
import com.itheima.domain.Items;
public interface ItemsDao {

    Items findById(Integer id);
}
    1. pojo Items: get/set/toString方法请自动补齐
    public class Items implements Serializable {

    private Integer id;
    private String name;
    private Double price;
    private String pic;
    private Date createtime;
    private String detail;

    ...
    1. dao接口代理配置文件 ItemsDao.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.itheima.dao.ItemsDao" >
    <select id="findById" parameterType="int" resultType="items">
        select * from items where id=#{id}
    </select>
</mapper>
    1. 单元测试文件
    @Test
public void testDao() {
    // 获取 spring 容器
    ApplicationContext ac = new ClassPathXmlApplicationContext(
            "classpath:spring/applicationContext-dao.xml");
    // 获取dao
    ItemsDao bean = ac.getBean(ItemsDao.class);
    // 调用方法测试
    System.out.println(bean.findById(1));
}

    4). 将ss_dao install到本地仓库

    四、创建ssm_service层模块

    1). 不使用骨架的方式创建ssm_service层模块

    1. 在idea左侧项目结构父工程上右击创建maven模块
    2. 跳过骨架选择，直接next
    3. 默认继承父工程，别修改，填写模块名即可 ssm_service next
    4. 注意目录结构，ssm_service要在B_maven_ssm_parent下 finish

    2). 项目结构

    ssm_service.png

    3). 代码以及配置文件

    1.配置文件

    1. pom.xml配置文件：

    注意，打包方式为 jar; ssm_service层依赖ssm_dao;需要导入坐标(之前已经install到本地仓库了)

    <artifactId>ssm_service</artifactId>
<packaging>jar</packaging>
<dependencies>
    <dependency>
        <groupId>com.itheima</groupId>
        <artifactId>ssm_dao</artifactId>
        <version>1.0-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
</dependencies>
    1. spring配置文件分支 applicationContext-service.xml
    <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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-4.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
        http://www.springframework.org/schema/util
        http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    <!-- service层配置文件 开始 -->
    <!-- 1. 组件扫描配置 -->
    <context:component-scan base-package="com.itheima.service"/>

    <!-- aop面向切面编程，切面就是切入点和通知的组合 -->
    <!-- 2. 配置事务管理器：增强过程函数 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
     </bean>

    <!-- 3. 配置事务通知 -->
    <tx:advice id="advice">
        <tx:attributes>
            <!-- 增删改都支持事务，以一下开头的方法执行， -->
            <tx:method name="save*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="delete*" propagation="REQUIRED"/>
            <tx:method name="find*" read-only="true"/>
            <!-- 其他方法以非find开头，也会使用事务 -->
            <tx:method name="*" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>

    <!-- 4. 配置切面 -->
    <aop:config>
        <aop:pointcut id="pointcut" expression="execution(* com.itheima.service.impl.*.*(..))"/>
        <aop:advisor advice-ref="advice" pointcut-ref="pointcut"/>
    </aop:config>
    <!-- service层配置文件 结束 -->

    <!-- 开始：下面语句是为了junit单元测试而引入的，测试时请打开注释；测试完毕后请删除！ -->
    <!--<import resource="classpath:spring/applicationContext-dao.xml"/>-->
    <!-- 结束： -->
</beans>

    2.代码文件

    1. service接口 ItemsService
    package com.itheima.service;
import com.itheima.domain.Items;
public interface ItemsService {
    public Items findById(Integer id);
}
    1. service层实现类
    package com.itheima.service.impl;
import com.itheima.dao.ItemsDao;
import com.itheima.domain.Items;
import com.itheima.service.ItemsService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class ItemsServiceImpl implements ItemsService {

    @Autowired
    private ItemsDao itemsDao;

    @Override
    public Items findById(Integer id) {
        return itemsDao.findById(id);
    }
}
    1. junit测试: 注意上一步中的注释说明！
    @Test
public void testService() {
    ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext(
            "classpath:spring/applicationContext-service.xml");
    ItemsService bean = ac.getBean(ItemsService.class);
    System.out.println(bean.findById(2));
}

    4). 将ss_service install 到本地仓库

    五、创建ssm_web层模块

    1). 选择骨架创建项目

    也可以使用非骨架方式创建

    1. 骨架名: org.apache.maven.archetypes:maven-archetype-webapp
    2. 填写工程名：ssm_web
    3. 创建src/main/java Make Directory as Sources Root
    4. 创建src/main/resources Make Directory as Resources Root

    2). 项目结构

    ssm_web.png

    3). 代码以及配置文件

    1. 配置文件

    1. pom.xml: 注意，web层打包方式为 war 
    <artifactId>ssm_web</artifactId>
<packaging>war</packaging>

<name>ssm_web Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<dependencies>
    <dependency>
        <groupId>com.itheima</groupId>
        <artifactId>ssm_service</artifactId>
        <version>1.0-SNAPSHOT</version>
    </dependency>
</dependencies>
    1. web.xml配置文件
    <?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">

  <!-- 配置编码过滤器 -->
  <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>

  <!-- 配置spring核心监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- 重新制定spring配置文件的路径 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

  <!-- springmvc核心servlet -->
  <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:springmvc.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>
    1. spring综合文件applicationContext.xml
    <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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-4.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
        http://www.springframework.org/schema/util
        http://www.springframework.org/schema/util/spring-util-4.0.xsd">


    <import resource="classpath:spring/applicationContext-service.xml"/>
    <import resource="classpath:spring/applicationContext-dao.xml"/>
</beans>
    1. SpringMVC配置文件springmvc.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"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd-4.0
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd-4.0
        http://www.springframework.org/schema/util
        http://www.springframework.org/schema/util/spring-util-4.0.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 组件扫描配置 -->
    <context:component-scan base-package="com.itheima.controller"/>

    <!-- 配置注解支持，会自动配置 处理器映射器，处理器适配器 -->
    <mvc:annotation-driven/>

    <!-- 视图解析器 -->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!-- 释放静态资源 -->
    <mvc:default-servlet-handler/>

</beans>
    1. log4j.properties日志配置文件
    # Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE            debug   info   warn error fatal
log4j.rootCategory=debug, CONSOLE, LOGFILE

# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE

# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=d:\axis.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

    2. 代码文件

    1. 控制器代码 ItemsController
    package com.itheima.controller;

import com.itheima.domain.Items;
import com.itheima.service.ItemsService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/items")
public class ItemsController {

    @Autowired
    private ItemsService itemsService;

    @RequestMapping("/findDetail/{id}")
    public String findDetail(Model model, @PathVariable Integer id) {
        Items item = itemsService.findById(id);
        model.addAttribute("item", item);
        return "itemDetail";
    }

}
    1. 首页测试代码index.jsp 核心
    <a href="${pageContext.request.contextPath}/items/findDetail/1">访问测试</a>
    1. 回馈页面 item.Detail.jsp 核心
    <form>
    <table width="100%" border=1>
        <tr>
            <td>商品名称</td>
            <td> ${item.name } </td>
        </tr>
        <tr>
            <td>商品价格</td>
            <td> ${item.price } </td>
        </tr>
        <tr>
            <td>生成日期</td>
            <td> <fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH:mm:ss"/> </td>
        </tr>
        <tr>
            <td>商品简介</td>
            <td>${item.detail} </td>
        </tr>
    </table>
</form>

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