maven聚合ssm

如果没有写过ssm项目请移步SSM后端框架搭建（有图有真相）-CSDN博客

数据库准备

create table `user` (`id` int (11),`uid` varchar (60),`name` varchar (60),`age` int (11),`sex` varchar (12)
); 
insert into `user` (`id`, `uid`, `name`, `age`, `sex`) values('10','20240909','张三丰','9999','男');
insert into `user` (`id`, `uid`, `name`, `age`, `sex`) values('11','20240907','张无忌','111','男');
insert into `user` (`id`, `uid`, `name`, `age`, `sex`) values('12','12010909','郭靖','11','男');
insert into `user` (`id`, `uid`, `name`, `age`, `sex`) values('13','22222222','黄蓉','18','女');
insert into `user` (`id`, `uid`, `name`, `age`, `sex`) values('14','43215678','赵敏','18','女');
insert into `user` (`id`, `uid`, `name`, `age`, `sex`) values('15','78787878','杨过','22','男');
insert into `user` (`id`, `uid`, `name`, `age`, `sex`) values('18','12344321','小龙女','18','女');

1.创建父项目

首先创建一个空项目

删除src目录，并整理pom.xml文件

在标签中引入项目所需的所有依赖（如下）并刷新

<!--mysql-->
<dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId><version>8.0.32</version>
</dependency><!--德鲁伊-->
<dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.9</version>
</dependency><!--mybatis-->
<dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.5</version>
</dependency><!--单元测试-->
<dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.13.1</version>
</dependency><!--补充实体类-->
<dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.30</version>
</dependency><!--spring上下文核心-->
<dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.3.20</version>
</dependency><!--代替单元测试-->
<dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>5.3.20</version>
</dependency><!--spring 事务-->
<dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>5.3.20</version>
</dependency><!--spring切面-->
<dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.9.9</version>
</dependency><!--springtemplate-->
<dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.3.20</version>
</dependency><!--mybatis整合spring坐标-->
<dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.1</version>
</dependency>
<!--springmvc-->
<dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.3.20</version>
</dependency>
<!--servlet-->
<dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>4.0.1</version>
</dependency>
<!--支持jsp-->
<dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.2</version>
</dependency>
<!--标准标签库-->
<dependency><groupId>jstl</groupId><artifactId>jstl</artifactId><version>1.2</version>
</dependency>
<!--日志-->
<dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>1.7.36</version>
</dependency>
<dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>1.7.36</version>
</dependency>
<!--支持web-->
<dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>5.3.20</version>
</dependency>
<!--解析xml-->
<dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.9.6</version>
</dependency>
<!--文件上传-->
<dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.3</version>
</dependency>
<dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.6</version>
</dependency>
<!--分页助手-->
<dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper</artifactId><version>5.2.0</version>
</dependency>
<dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.76</version>
</dependency>

2.创建mapper层

在父模块下新建子模块

整理pom.xml文件

构建mapper模块的结构

在resources创建spring配置文件applicationContext-mapper.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:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsd"><!--注解组件扫描--><context:component-scan base-package="com.myself.mapper"/><!--spring整合mybatis--><context:property-placeholder location="classpath:druid.properties"/><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"><property name="driverClassName" value="${jdbc.driverClassName}"/><property name="url" value="${jdbc.url}"/><property name="username" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/></bean><!--SqlSessionFactory创建交给spring的IOC容器--><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><!--数据库环境配置--><property name="dataSource" ref="dataSource"/><!--类型别名配置--><property name="typeAliasesPackage" value="com.myself.pojo"/><!--如果要引入mybatis主配置文件，可以通过如下配置--><!--<property name="configLocation" value="classpath:SqlMapConfig.xml"/>--></bean><!--映射接口扫描配置，由spring创建代理对象，交给IOC容器--><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="com.myself.mapper"/></bean><!--事务管理器--><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource"></property></bean><!--开启事务注解支持--><tx:annotation-driven/>
</beans>

在resources创建数据库连接文件

jdbc.driverClassName=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db1?serverTimezone=UTC&characterEncoding=utf8&useUnicode=true&useSSL=false
jdbc.username=root
jdbc.password=123456initialSize=5
maxActive=10
maxWait=3000

创建User对象

@Data
public class User {private int id;private String uid;private String name;private int age;private String sex;
}

在UserMapper创建接口

在其对应的映射文件中实现

<?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.myself.mapper.UserMapper"><select id="findAll" resultType="com.myself.pojo.User">select * from user;</select>
</mapper>

在test中创建测试类

3.创建service层

在父模块下创建子模块

整理pom.xml文件

创建service模块结构

在resources文件下创建spring配置文件applicationContext-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"xmlns:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsd"><!--注解组件扫描--><context:component-scan base-package="com.myself.service"/><import resource="classpath:applicationContext-mapper.xml"/>
</beans>

在UserService 创建接口 并实现

创建测试类

4.创建web层

在父模块下创建子模块

整理pom.xml文件

构建web子模块结构

在resources下创建springmvc配置文件

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><!--组件扫描--><context:component-scan base-package="com.myself.controller"/><!--mvc注解增强--><mvc:annotation-driven/><!--视图解析器 如果前后端分离则不需要--><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/"/><property name="suffix" value=".jsp"/></bean><!--实现静态资源映射--><mvc:default-servlet-handler/>
</beans>

在resources文件下创建spring配置文件applicationContext-web.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:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsd"><import resource="classpath:applicationContext-service.xml"/></beans>

在web.xml配置文件中加入配置

<!--前端控制器-->
<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>2</load-on-startup>
</servlet>
<servlet-mapping><servlet-name>DispatcherServlet</servlet-name><url-pattern>/</url-pattern>
</servlet-mapping>
<!--post中文处理-->
<filter><filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name><url-pattern>/*</url-pattern>
</filter-mapping><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext-web.xml</param-value>
</context-param>

在UserController中写入

配置tomcat

测试运行