2022-08-20  阅读(384)

在上文中,我们演示了Spring MVC Maven单模块SSM整合,一些中大型项目,我希望采用Maven多模块构建方式来搭建SSM整合项目。下面在IDEA中演示如何使用Maven的多模块方式构建SSM项目。

Maven多模块构建SSH项目架构图:

202202131335197501.png

1 建立parent工程

1.1 建立父工程模块

202202131335203162.png

1.2 配置父工程的pom.xml

            
            <?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>
            
                <groupId>com.yiidian</groupId>
                <artifactId>yiidian-parent</artifactId>
                <version>1.0-SNAPSHOT</version>
            
                <!--
                 SSM整合的基础依赖
               -->
                <!-- 1.spring相关的依赖 -->
                <dependencies>
                    <!-- 1.1 ioc -->
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring-context</artifactId>
                        <version>5.0.2.RELEASE</version>
                    </dependency>
                    <!--1.2 aop -->
                    <dependency>
                        <groupId>org.aspectj</groupId>
                        <artifactId>aspectjweaver</artifactId>
                        <version>1.8.7</version>
                    </dependency>
                    <!-- 1.3 声明式事务-->
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring-tx</artifactId>
                        <version>5.0.2.RELEASE</version>
                    </dependency>
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring-jdbc</artifactId>
                        <version>5.0.2.RELEASE</version>
                    </dependency>
                    <!-- 1.4 test -->
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring-test</artifactId>
                        <version>5.0.2.RELEASE</version>
                    </dependency>
                    <dependency>
                        <groupId>junit</groupId>
                        <artifactId>junit</artifactId>
                        <version>4.12</version>
                    </dependency>
            
            
                    <!-- 2. mybatis相关依赖 -->
                    <!-- 2.1 mysql驱动-->
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.46</version>
                    </dependency>
                    <!-- 2.2 数据源 -->
                    <dependency>
                        <groupId>com.alibaba</groupId>
                        <artifactId>druid</artifactId>
                        <version>1.1.6</version>
                    </dependency>
                    <!-- 2.3 mybatis核心包 -->
                    <dependency>
                        <groupId>org.mybatis</groupId>
                        <artifactId>mybatis</artifactId>
                        <version>3.4.5</version>
                    </dependency>
            
                    <!-- 3. springmvc相关依赖-->
                    <!-- 3.1 springmvc核心包 -->
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring-webmvc</artifactId>
                        <version>5.0.2.RELEASE</version>
                    </dependency>
                    <!--3.2 servlet依赖 -->
                    <dependency>
                        <groupId>javax.servlet</groupId>
                        <artifactId>servlet-api</artifactId>
                        <version>2.5</version>
                    </dependency>
                    <!--3.3 jstl标签库-->
                    <dependency>
                        <groupId>jstl</groupId>
                        <artifactId>jstl</artifactId>
                        <version>1.2</version>
                    </dependency>
            
                    <!-- 4. log4j日志 -->
                    <dependency>
                        <groupId>log4j</groupId>
                        <artifactId>log4j</artifactId>
                        <version>1.2.17</version>
                    </dependency>
            
                    <!-- 5. spring与mybatis整合包 *** -->
                    <dependency>
                        <groupId>org.mybatis</groupId>
                        <artifactId>mybatis-spring</artifactId>
                        <version>1.3.1</version>
                    </dependency>
                </dependencies>
            </project>

2 建立Domain工程

2.1 建立子模块

点击父工程右键->Module

202202131335207193.png

2.2 编写Pojo类

            
            package com.yiidian.domain;
            
            import java.util.Date;
            
            /**
             * 实体类
             * 一点教程网 - www.yiidian.com
             */
            public class User {
                private Integer id;
                private String username;
                private Date birthday;
                private String sex;
                private String address;
            
                public Integer getId() {
                    return id;
                }
            
                public void setId(Integer id) {
                    this.id = id;
                }
            
                public String getUsername() {
                    return username;
                }
            
                public void setUsername(String username) {
                    this.username = username;
                }
            
                public Date getBirthday() {
                    return birthday;
                }
            
                public void setBirthday(Date birthday) {
                    this.birthday = birthday;
                }
            
                public String getSex() {
                    return sex;
                }
            
                public void setSex(String sex) {
                    this.sex = sex;
                }
            
                public String getAddress() {
                    return address;
                }
            
                public void setAddress(String address) {
                    this.address = address;
                }
            
                @Override
                public String toString() {
                    return "User{" +
                            "id=" + id +
                            ", username='" + username + '\'' +
                            ", birthday=" + birthday +
                            ", sex='" + sex + '\'' +
                            ", address='" + address + '\'' +
                            '}';
                }
            }

2.3 项目结构

202202131335211994.png

3 建立Dao工程

3.1 建立子模块

202202131335217895.png

3.2 依赖domain工程

            
            <dependencies>
                <dependency>
                     <groupId>com.yiidian</groupId>
                     <artifactId>yiidian-domain</artifactId>
                     <version>1.0-SNAPSHOT</version>
                </dependency>
            </dependencies>

3.3 编写Dao接口

            
            package com.yiidian.dao;
            import com.yiidian.domain.User;
            import org.apache.ibatis.annotations.Select;
            
            import java.util.List;
            
            /**
             * Dao接口
             */
            public interface UserDao {
                /**
                 * 查询所有账户
                 */
                @Select("select * from user")
                public List<User> findAll();
            }

3.4 编写Spring的Dao配置

202202131335222636.png

内容如下:

            
            <?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 http://www.springframework.org/schema/context/spring-context.xsd">
                
                <!-- 1. 创建数据源 -->
                <context:property-placeholder location="classpath:jdbc.properties"/>
            
                <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
                    <property name="url" value="${jdbc.url}"/>
                    <property name="driverClassName" value="${jdbc.driver}"/>
                    <property name="username" value="${jdbc.username}"/>
                    <property name="password" value="${jdbc.password}"/>
                </bean>
            
                <!-- 2. 为了创建Dao代理对象,先创建SqlSessionFactory对象 -->
                <!--  SqlSessionFactoryBean: 创建SqlSessionFactory对象的工具 -->
                <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
                    <!-- 注入数据源 -->
                    <property name="dataSource" ref="dataSource"/>
                </bean>
            
                <!-- 3. 扫描Dao接口所在包,扫描后用于创建Dao代理对象,把代理对象放入IOC容器 -->
                <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
                    <!-- Dao扫描目录 -->
                    <property name="basePackage" value="com.yiidian.dao"/>
                </bean>
            </beans>

applicationContext-dao.xml文件只存放与Dao有关的配置

3.5 准备jdbc.properties文件

            
            jdbc.driver=com.mysql.jdbc.Driver
            jdbc.url=jdbc:mysql://localhost:3306/ssm?characterEncoding=utf8
            jdbc.username=root
            jdbc.password=root
            jdbc.initialSize=3
            jdbc.maxActive=10

4 建立Service工程

4.1 建立子模块

202202131335227807.png

4.2 依赖Dao工程

            
            <dependencies>
                 <dependency>
                     <groupId>com.yiidian</groupId>
                     <artifactId>yiidian-dao</artifactId>
                     <version>1.0-SNAPSHOT</version>
                 </dependency>
            </dependencies>

4.3 编写Service接口和实现

Service接口

            
            package com.yiidian.service;
            
            import com.yiidian.domain.User;
            
            import java.util.List;
            
            /**
             * 业务层接口
             * 一点教程网 - www.yiidian.com
             */
            public interface UserService {
                /**
                 * 查询所有用户
                 */
                public List<User> findAll();
            }

Service实现类

            
            package com.yiidian.service.impl;
            
            import com.yiidian.dao.UserDao;
            import com.yiidian.domain.User;
            import com.yiidian.service.UserService;
            import org.springframework.beans.factory.annotation.Autowired;
            import org.springframework.stereotype.Service;
            
            import java.util.List;
            
            /**
             *业务层实现类
             * 一点教程网 - www.yiidian.com
             */
            @Service
            public class UserServiceImpl implements UserService{
                //注入Dao对象
                @Autowired
                private UserDao userDao;
                @Override
                public List<User> findAll() {
                    return userDao.findAll();
                }
            }

4.4 编写Spring的Service配置

202202131335232098.png

内容如下:

            
            <?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Service接口-->
                <context:component-scan base-package="com.yiidian.service"/>
            
                <!--Spring声明式事务-->
                <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
                    <property name="dataSource" ref="dataSource"/>
                </bean>
            
                <!--事务通知-->
                <tx:advice id="txAdvice" transaction-manager="transactionManager">
                    <tx:attributes>
                        <tx:method name="get*" isolation="DEFAULT" propagation="SUPPORTS" read-only="true"/>
                        <tx:method name="load*" isolation="DEFAULT" propagation="SUPPORTS" read-only="true"/>
                        <tx:method name="select*" isolation="DEFAULT" propagation="SUPPORTS" read-only="true"/>
                        <tx:method name="find*" isolation="DEFAULT" propagation="SUPPORTS" read-only="true"/>
                        <tx:method name="*" isolation="DEFAULT" propagation="REQUIRED"/>
                    </tx:attributes>
                </tx:advice>
            
                <!--事务切面-->
                <aop:config>
                    <!--切入点-->
                    <aop:pointcut id="pt" expression="execution(* com.yiidian.service.impl.*ServiceImpl.*(..))"/>
                    <!--切面-->
                    <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
                </aop:config>
            </beans>

该配置主要需要扫描Service实现类和配置Spring声明式事务。

5 建立Web工程

5.1 建立子模块

202202131335237149.png

5.2 依赖Service工程

            
            <dependencies>
                 <dependency>
                    <groupId>com.yiidian</groupId>
                    <artifactId>yiidian-service</artifactId>
                    <version>1.0-SNAPSHOT</version>
                 </dependency>
            </dependencies>

该项目为Web项目

2022021313352414310.png

5.3 配置监听器和核心控制器

            
            <?xml version="1.0" encoding="UTF-8"?>
            <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            		 xmlns="http://java.sun.com/xml/ns/javaee"
            		 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
            		 version="2.5">
            	
            	<context-param>
            		<param-name>contextConfigLocation</param-name>
            		<param-value>classpath*:applicationContext-*.xml</param-value>
            	</context-param>
            
            	<listener>
            		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
            	</listener>
            
            	<!-- 配置核心控制器 -->
            	<servlet>
            		<servlet-name>dispatcherServlet</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>dispatcherServlet</servlet-name>
            		<url-pattern>/</url-pattern>
            	</servlet-mapping>
            </web-app>

这里注意Spring监听器读取的路径为classpath*:,这个语法指加载当前项目及依赖工程的所有符合条件的文件。因为applicationContext.xml分布在不同的Maven工程,所以必须使用该语法加载!

5.4 springmvc.xml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: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 http://www.springframework.org/schema/mvc/spring-mvc.xsd">
            
                <!-- 1.扫描控制器 -->
                <context:component-scan base-package="com.yiidian.controller"/>
            
                <!-- 2.视图解析器 -->
                <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
                    <property name="prefix" value="/pages/"/>
                    <property name="suffix" value=".jsp"/>
                </bean>
            
                <!-- 3.创建处理器映射器和处理器适配器 -->
                <mvc:annotation-driven/>
            </beans>

5.5 编写UserController

            
            package com.yiidian.controller;
            
            import com.yiidian.domain.User;
            import com.yiidian.service.UserService;
            import org.springframework.beans.factory.annotation.Autowired;
            import org.springframework.stereotype.Controller;
            import org.springframework.ui.Model;
            import org.springframework.web.bind.annotation.RequestMapping;
            
            import java.util.List;
            
            /**
             * 控制器
             * 一点教程网 - www.yiidian.com
             */
            @Controller
            @RequestMapping("/user")
            public class UserController {
                @Autowired
                private UserService userService;
            
                /**
                 * 查询所有用户
                 */
                @RequestMapping("/list")
                public String list(Model model){
                    //调用业务层方法
                    List<User> list = userService.findAll();
            
                    //存入数据到request域
                    model.addAttribute("list",list);
                    //返回list.jsp页面
                    return "list";
                }
            }

5.6 编写JSP显示数据

            
            <%@ page contentType="text/html;charset=UTF-8" language="java" %>
            <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
            <html>
            <head>
                <title>一点教程网-显示用户数据</title>
            </head>
            <body>
            <h3>用户列表</h3>
            | 编号|用户名|生日|性别|地址|
        | :-----: | :-----: | :-----: | :-----: | :-----: | 
        | 编号 | 用户名 | 生日 | 性别 | 地址 | 
        | ${user.id} | ${user.username} | ${user.birthday} | ${user.sex} | ${user.address} | 
        
            </body>
            </html>

5.7 最终项目结构

2022021313352464611.png

5.8 运行Web项目,访问测试

2022021313352520612.png

源码下载:https://pan.baidu.com/s/1zvoP6pQAK9zADZRtSrEh4w

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