一. SSM分层搭建
1. 项目拆分
将单模块工程项目拆分成 ssm、ssm_controller、ssm_service、ssm_dao、ssm_pojo 多模块工程项目，如下图：
2. ssm父层
新建1个普通的maven项目，删除多余的文件夹，仅保留pom.xml，后续用于统一构建和管理。
3. ssm_pojo层
(1). 新建1个普通的maven项目ssm_pojo，该层主要用来存放实体类。
(2). 在com.ypf.domain下创建User实体类。
4. ssm_dao层
(1). 新建普通的maven项目ssm_dao，该模块为仓储层，主要用来存放 仓储接口、SQL映射的xml文件、db的相关配置和核心配置文件，如下图：
(2). pom文件中引入相关坐标：ssm_pojo资源、spring、spring整合mybatis、druid、pagehelper分页插件
<dependencies> <!--导入资源文件pojo--> <dependency> <groupId>org.ypf</groupId> <artifactId>ssm_pojo</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <!--spring环境--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.2.9.RELEASE</version> </dependency> <!-- Spring整合mybatis相关坐标--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> <scope>runtime</scope> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.7</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.2.9.RELEASE</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.6</version> </dependency> <!--第三方资源配置(阿里数据源方案Druid)--> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.2.6</version> </dependency> <!--分页插件坐标--> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>5.2.1</version> </dependency> <dependency> <groupId>com.github.jsqlparser</groupId> <artifactId>jsqlparser</artifactId> <version>4.1</version> </dependency> </dependencies>
注意：
需要先在ssm_pojo模块中运行install指令，将其安装到本地仓库里，然后再在ssm_dao中引入，然后运行compile编译。
(3). 在com.ypf.dao下新建UserDao仓储接口、UserDao.xml的Sql配置文件
UserDao接口
public interface UserDao { /** * 添加用户 * @param user * @return */ public boolean save(User user); /** * 修改用户 * @param user * @return */ public boolean update(User user); /** * 删除用户 * @param uuid * @return */ public boolean delete(Integer uuid); /** * 查询单个用户信息 * @param uuid * @return */ public User get(Integer uuid); /** * 查询全部用户信息 * @return */ public List<User> getAll(); /** * 根据用户名密码查询个人信息 * @param userName 用户名 * @param password 密码信息 * @return */ //注意：数据层操作不要和业务层操作的名称混淆，通常数据层仅反映与数据库间的信息交换，不体现业务逻辑 public User getByUserNameAndPassword(@Param("userName") String userName,@Param("password") String password); }
UserDao.xml的SQL配置文件
<?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.ypf.dao.UserDao"> <!--添加--> <insert id="save" parameterType="user"> insert into user(userName,password,realName,gender,birthday)values(#{userName},#{password},#{realName},#{gender},#{birthday}) </insert> <!--删除--> <delete id="delete" parameterType="int"> delete from user where uuid = #{uuid} </delete> <!--修改--> <update id="update" parameterType="user"> update user set userName=#{userName},password=#{password},realName=#{realName},gender=#{gender},birthday=#{birthday} where uuid=#{uuid} </update> <!--查询单个--> <select id="get" resultType="user" parameterType="int"> select * from user where uuid = #{uuid} </select> <!--分页查询--> <select id="getAll" resultType="user"> select * from user </select> <!--登录--> <select id="getByUserNameAndPassword" resultType="user" > select * from user where userName=#{userName} and password=#{password} </select> </mapper>
(4). 新建 applicationContext-dao.xml核心配置文件 和 jdbc的配置文件
主要用来配置：开启bean的注解扫描、加载配置文件、数据源配置、整合Mybatis到Spring、整合分页插件、Sql文件扫描映射。
applicationContext-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: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"> <!--开启bean注解扫描--> <context:component-scan base-package="com.ypf"/> <!--加载properties文件--> <context:property-placeholder location="classpath*:jdbc.properties"/> <!--数据源--> <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> <!--整合mybatis到spring中--> <bean class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="typeAliasesPackage" value="com.ypf.domain"/> <!--分页插件--> <property name="plugins"> <array> <bean class="com.github.pagehelper.PageInterceptor"> <property name="properties"> <props> <prop key="helperDialect">mysql</prop> <prop key="reasonable">true</prop> </props> </property> </bean> </array> </property> </bean> <!--mybatis xml的sql文件映射扫描--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.ypf.dao"/> </bean> </beans>
注：
该层中删掉了开启注解事务 和 事务管理器(后面放到service层中)
jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://xxx:3306/ssm?useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true jdbc.username=root jdbc.password=xxx
5. ssm_service层
(1). 新建普通的maven项目ssm_service，该模块为业务层，主要用来编写业务接口、业务实现类、事务的配置。
(2). pom文件中引入相关坐标：ssm_dao、spring、spring整合Junit相关。（间接依赖ssm_pojo）
<?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>org.ypf</groupId> <artifactId>ssm_service</artifactId> <version>1.0-SNAPSHOT</version> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compiler.target> </properties> <dependencies> <!--导入资源文件ssm_dao--> <dependency> <groupId>org.ypf</groupId> <artifactId>ssm_dao</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <!--Spring 坐标--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.2.9.RELEASE</version> </dependency> <!-- Spring整合Junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.13.2</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>5.2.9.RELEASE</version> </dependency> </dependencies> </project>
注意：
需要先在ssm_dao模块中运行install指令，将其安装到本地仓库里，然后再在ssm_service中引入，然后运行compile编译。
(3). 新建核心配置文件applicationContext-service.xml，配置：开启bean扫描、开启注解式事务、事务管理器。
<?xml version="1.0" encoding="UTF-8"?> <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"> <!--开启bean注解扫描--> <context:component-scan base-package="com.ypf"/> <!--开启注解式事务--> <tx:annotation-driven transaction-manager="txManager"/> <!--事务管理器 注：下面的dataSource变红，只是个语法检查，并不是错误--> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"/> </bean> </beans>
(4). 编写业务接口和业务实现类。
UserService(配置事务)
package com.ypf.service; import com.github.pagehelper.PageInfo; import com.ypf.domain.User; import org.springframework.transaction.annotation.Transactional; @Transactional(readOnly = true) public interface UserService { /** * 添加用户 * @param user * @return */ @Transactional(readOnly = false) public boolean save(User user); /** * 修改用户 * @param user * @return */ @Transactional(readOnly = false) public boolean update(User user); /** * 删除用户 * @param uuid * @return */ @Transactional(readOnly = false) public boolean delete(Integer uuid); /** * 查询单个用户信息 * @param uuid * @return */ public User get(Integer uuid); /** * 查询全部用户信息 * @return */ public PageInfo<User> getAll(int page, int size); /** * 根据用户名密码进行登录 * @param userName * @param password * @return */ public User login(String userName,String password); }
UserServiceImpl
package com.ypf.service.impl; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.ypf.dao.UserDao; import com.ypf.domain.User; import com.ypf.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service //等价于@Component public class UserServiceImpl implements UserService { @Autowired private UserDao userDao; @Override public boolean save(User user) { return userDao.save(user); } @Override public boolean update(User user) { return userDao.update(user); } @Override public boolean delete(Integer uuid) { return userDao.delete(uuid); } @Override public User get(Integer uuid) { return userDao.get(uuid); } @Override public PageInfo<User> getAll(int page, int size) { PageHelper.startPage(page,size); List<User> all = userDao.getAll(); return new PageInfo<User>(all); } @Override public User login(String userName, String password) { return userDao.getByUserNameAndPassword(userName,password); } }
(5). 基于Junit进行测试
需要依赖application-dao.xml和application-service.xml两个配置文件。
@RunWith(SpringJUnit4ClassRunner.class) //注意下面测试的时候，必须要还要引入applicationContext-dao.xml @ContextConfiguration(locations = {"classpath:applicationContext-service.xml","classpath:applicationContext-dao.xml"}) public class MyTest1 { @Autowired private UserService userService; @Test public void testSave(){ User user = new User(); user.setUserName("Jock1"); user.setPassword("root1"); user.setRealName("Jockme1"); user.setGender(1); user.setBirthday(new Date(333333000000L)); userService.save(user); System.out.println("运行成功。。。。。。。"); } @Test public void testDelete(){ User user = new User(); userService.delete(1); System.out.println("运行成功。。。。。。。"); } @Test public void testUpdate(){ User user = new User(); user.setUuid(1); user.setUserName("Jock2"); user.setPassword("root2"); user.setRealName("JockIsMe2"); user.setGender(1); user.setBirthday(new Date(333333000000L)); userService.update(user); } @Test public void testGet(){ User user = userService.get(1); System.out.println(user); } @Test public void testGetAll(){ PageInfo<User> all = userService.getAll(2, 2); System.out.println(all); System.out.println(all.getList().get(0)); System.out.println(all.getList().get(1)); } @Test public void testLogin(){ User user = userService.login("Jockme", "root"); System.out.println(user); } }
部分运行结果：
6. ssm_controller层
(1). 新建1个maven的web项目ssm_controller，该层主要对外提供业务接口
(2). pom文件中修改打包类型为war，引入相关坐标：ssm_service、springmvc、servlet、json相关坐标，配置tomcat7插件
<?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>org.ypf</groupId> <artifactId>ssm_controller</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>ssm_controller Maven Webapp</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compiler.target> </properties> <dependencies> <!--导入资源文件ssm_service--> <dependency> <groupId>org.ypf</groupId> <artifactId>ssm_service</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <!--springmvc的坐标--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.9.RELEASE</version> </dependency> <!--servlet 4.0规范--> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> <scope>provided</scope> </dependency> <!--json相关坐标3个 仅导入1个即可--> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.9.9</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.9.9</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>2.9.9</version> </dependency> </dependencies> <build> <finalName>ssm_controller</finalName> <pluginManagement> <plugins> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> <configuration> <port>8888</port> </configuration> </plugin> </plugins> </pluginManagement> </build> </project>
注意：
需要先在ssm_service模块中运行install指令，将其安装到本地仓库里，然后再在ssm_controller中引入，然后运行compile编译。
(3). 新增spring-mvc.xml核心配置文件，用来：扫描加载类、开启springmvc注解驱动、解决全局乱码问题。
<?xml version="1.0" encoding="UTF-8"?> <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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 1.加载扫描类 --> <!--1.1 扫描加载所有的控制类--> <context:component-scan base-package="com.ypf.controller"/> <!--2开启springmvc注解驱动--> <mvc:annotation-driven> <!-- 全局解决中文乱码问题 --> <mvc:message-converters> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/> <bean class="org.springframework.http.converter.StringHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/plain;charset=utf-8</value> <value>text/html;charset=UTF-8</value> </list> </property> </bean> </mvc:message-converters> </mvc:annotation-driven> </beans>
(4). 配置web.xml核心文件
<?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_3_1.xsd" version="3.1"> <!--加载核心文件 --> <!--通过 applicationContext-* 匹配所有配置文件--> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:applicationContext-*.xml</param-value> </context-param> <!--启动服务器时，通过监听器加载spring运行环境--> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 请求模型 --> <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*:spring-mvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>DispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
(5). 全局异常过滤器和返回结果，详见前一节
(6). 新增UserController，编写对外接口
package com.ypf.controller; import com.github.pagehelper.PageInfo; import com.ypf.controller.results.Code; import com.ypf.controller.results.Result; import com.ypf.domain.User; import com.ypf.service.UserService; import com.ypf.system.exception.BusinessException; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; @RestController @RequestMapping("/user") public class UserController { @Autowired private UserService userService; @PostMapping public Result save(User user) { boolean flag = userService.save(user); return new Result(flag ? Code.SAVE_OK : Code.SAVE_ERROR); } @PutMapping public Result update(User user) { boolean flag = userService.update(user); return new Result(flag ? Code.UPDATE_OK : Code.UPDATE_ERROR); } @DeleteMapping("/{uuid}") public Result delete(@PathVariable Integer uuid) { boolean flag = userService.delete(uuid); return new Result(flag ? Code.DELETE_OK : Code.DELETE_ERROR); } @GetMapping("/{uuid}") //http://localhost:8888/ssm_controller/user/1 public Result get(@PathVariable Integer uuid) { User user = userService.get(uuid); return new Result(null != user ? Code.GET_OK : Code.GET_ERROR, user); } @GetMapping("/{page}/{size}") //http://localhost:8888/ssm_controller/user/1/2 public Result getAll(@PathVariable Integer page, @PathVariable Integer size) { PageInfo<User> all = userService.getAll(page, size); return new Result(null != all ? Code.GET_OK : Code.GET_ERROR, all); } @PostMapping("/login") public Result login(String userName, String password) { User user = userService.login(userName, password); return new Result(null != user ? Code.GET_OK : Code.GET_ERROR, user); } //测试全局异常处理器 //http://localhost:8888/ssm_controller/user/getError/10 @GetMapping("/getError/{uuid}") public Result getError(@PathVariable Integer uuid) { User user = userService.get(uuid); //模拟出现异常，使用条件控制，便于测试结果 if (uuid == 10) throw new BusinessException("查询出错啦，请重试！", Code.GET_ERROR); return new Result(null != user ? Code.GET_OK : Code.GET_ERROR, user); } }
二. 聚合和继承
1. 聚合
(1). 背景
多模块构建维护
(2). 作用
聚合用于快速构建maven工程，一次性构建多个项目/模块。
(3). 实操
A. 在ssm模块中修改打包类型为pom
<!--定义该工程用于进行构建管理--> <packaging>pom</packaging>
B. 定义当前模块进行构建操作时关联的其他模块名称
<!--管理的工程列表--> <modules> <!--具体的工程名称--> <module>../ssm_controller</module> <module>../ssm_service</module> <module>../ssm_dao</module> <module>../ssm_pojo</module> </modules>
C. 运行complise进行编译
2. 继承
(1). 作用
通过继承可以实现在子工程中沿用父工程中的配置。在子工程中定义依赖关系，无需声明依赖版本，版本参照父工程中依赖的版本。（如有特别需要，则在子工程中单独声明版本）
(2). 实操
A. 在ssm父工程中定义依赖包和依赖插件。
<?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>org.ypf</groupId> <artifactId>ssm</artifactId> <version>1.0-SNAPSHOT</version> <!--定义该工程用于进行构建管理--> <packaging>pom</packaging> <!--管理的工程列表--> <modules> <!--具体的工程名称--> <module>../ssm_controller</module> <module>../ssm_service</module> <module>../ssm_dao</module> <module>../ssm_pojo</module> </modules> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compiler.target> </properties> <!--定义父工程的依赖包--> <dependencyManagement> <dependencies> <!--一. 项目自身的模块--> <dependency> <groupId>org.ypf</groupId> <artifactId>ssm_pojo</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <dependency> <groupId>org.ypf</groupId> <artifactId>ssm_dao</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <dependency> <groupId>org.ypf</groupId> <artifactId>ssm_service</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <!--二. 第三方模块依赖--> <!--spring环境--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.2.9.RELEASE</version> </dependency> <!-- Spring整合Junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.13.2</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>5.2.9.RELEASE</version> </dependency> <!-- Spring整合mybatis相关坐标--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> <scope>runtime</scope> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.7</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.2.9.RELEASE</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.6</version> </dependency> <!--第三方资源配置(阿里数据源方案Druid)--> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.2.6</version> </dependency> <!--分页插件坐标--> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>5.2.1</version> </dependency> <dependency> <groupId>com.github.jsqlparser</groupId> <artifactId>jsqlparser</artifactId> <version>4.1</version> </dependency> <!--springmvc的坐标--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.9.RELEASE</version> </dependency> <!--servlet 4.0规范--> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> <scope>provided</scope> </dependency> <!--json相关坐标3个 仅导入1个即可--> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.9.9</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.9.9</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>2.9.9</version> </dependency> </dependencies> </dependencyManagement> <!--定义父工程的插件--> <build> <pluginManagement> <plugins> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> <configuration> <port>8888</port> </configuration> </plugin> </plugins> </pluginManagement> </build> </project>
B. 以ssm_controller层为例，编写继承用法
①定义父工程
<!--定义父工程--> <parent> <groupId>org.ypf</groupId> <artifactId>ssm</artifactId> <version>1.0-SNAPSHOT</version> <!--填写父工程的pom文件--> <relativePath>../ssm/pom.xml</relativePath> </parent>
②修改项目自身信息
<!--项目自身信息--> <modelVersion>4.0.0</modelVersion> <artifactId>ssm_controller</artifactId> <packaging>war</packaging>
③继承依赖坐标
<dependencies> <!--导入资源文件ssm_service--> <dependency> <groupId>org.ypf</groupId> <artifactId>ssm_service</artifactId> </dependency> <!--springmvc的坐标--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> </dependency> <!--servlet 4.0规范--> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <scope>provided</scope> </dependency> <!--json相关坐标3个 仅导入1个即可--> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> </dependency> </dependencies>
④继承依赖插件
<build> <finalName>ssm_controller</finalName> <pluginManagement> <plugins> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> </plugin> </plugins> </pluginManagement> </build>
C. ssm_service层如下
<?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"> <!--定义父工程--> <parent> <groupId>org.ypf</groupId> <artifactId>ssm</artifactId> <version>1.0-SNAPSHOT</version> <!--填写父工程的pom文件--> <relativePath>../ssm/pom.xml</relativePath> </parent> <!--项目自身信息--> <modelVersion>4.0.0</modelVersion> <artifactId>ssm_service</artifactId> <packaging>jar</packaging> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compiler.target> </properties> <dependencies> <!--导入资源文件ssm_dao--> <dependency> <groupId>org.ypf</groupId> <artifactId>ssm_dao</artifactId> </dependency> <!--Spring 坐标--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> </dependency> <!-- Spring整合Junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> </dependency> </dependencies> </project>
D. ssm_dao层如下
<?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"> <!--定义父工程--> <parent> <groupId>org.ypf</groupId> <artifactId>ssm</artifactId> <version>1.0-SNAPSHOT</version> <!--填写父工程的pom文件--> <relativePath>../ssm/pom.xml</relativePath> </parent> <!--项目自身信息--> <modelVersion>4.0.0</modelVersion> <artifactId>ssm_dao</artifactId> <packaging>jar</packaging> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compiler.target> </properties> <dependencies> <!--导入资源文件pojo--> <dependency> <groupId>org.ypf</groupId> <artifactId>ssm_pojo</artifactId> </dependency> <!--spring环境--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> </dependency> <!-- Spring整合mybatis相关坐标--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> </dependency> <!--第三方资源配置(阿里数据源方案Druid)--> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> </dependency> <!--分页插件坐标--> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> </dependency> <dependency> <groupId>com.github.jsqlparser</groupId> <artifactId>jsqlparser</artifactId> </dependency> </dependencies> </project>
E. ssm_pojo层如下
<?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"> <!--定义父工程--> <parent> <groupId>org.ypf</groupId> <artifactId>ssm</artifactId> <version>1.0-SNAPSHOT</version> <!--填写父工程的pom文件--> <relativePath>../ssm/pom.xml</relativePath> </parent> <!--项目自身信息--> <modelVersion>4.0.0</modelVersion> <artifactId>ssm_pojo</artifactId> <packaging>jar</packaging> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compiler.target> </properties> <dependencies> </dependencies> </project>
三. 属性、版本、资源配置、多环境、跳过测试
1. 属性配置
(1). 自定义属性
<!--项目构建版本--> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compiler.target> <!--自定义属性--> <spring.version>5.2.9.RELEASE</spring.version> <junit.version>4.13.2</junit.version> </properties>
调用：
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <!-- Spring整合Junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> </dependency>
(2). 内置属性
比如：
${basedir}
${version}
调用：
<dependency> <groupId>org.ypf</groupId> <artifactId>ssm_pojo</artifactId> <!--version是maven的内置属性，就是顶部那个值--> <version>${version}</version> </dependency>
2. 版本说明
(1). 工程版本
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项目开发过程中，为方便团队成员合作，解决模块间相互依赖和时时更新的问题，开发者对每个模块进行构建的时候，输出的临时性版本叫快照版本（测试阶段版本）
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u快照版本会随着开发的进展不断更新
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RELEASE（发布版本）
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(2). 版本号约定
约定规范：
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<主版本>.<次版本>.<增量版本>.<里程碑版本>
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主版本：表示项目重大架构的变更，如：spring5相较于spring4的迭代
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次版本：表示有较大的功能增加和变化，或者全面系统地修复漏洞
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增量版本：表示有重大漏洞的修复
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里程碑版本：表明一个版本的里程碑（版本内部）。这样的版本同下一个正式版本相比，相对来说不是很稳定，有待更多的测试
3. 资源配置
在任意模块中都可以加载ssm父模块中的pom.xml定义的属性。
自定义属性
<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compiler.target> <!--自定义属性--> <spring.version>5.2.9.RELEASE</spring.version> <junit.version>4.13.2</junit.version> <!--在jdbc.properties中可以直接使用 --> <mydb.url>jdbc:mysql://47.92.111.18:3306/ssm?useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true</mydb.url> </properties>
开启配置
<!--配置资源文件对应的信息--> <resources> <resource> <!--设定配置文件对应的位置目录，支持使用属性动态设定路径--> <directory>${project.basedir}/src/main/resources</directory> <!--开启对配置文件的资源加载过滤--> <filtering>true</filtering> </resource> </resources> <!--配置测试资源文件对应的信息--> <testResources> <testResource> <directory>${project.basedir}/src/test/resources</directory> <filtering>true</filtering> </testResource> </testResources>
在ssm_dao中的jdbc.properties中调用
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=${mydb.url} jdbc.username=root jdbc.password=ypf123456
4. 多环境
<profiles> <!--定义具体的环境：生产环境--> <profile> <!--定义环境对应的唯一名称--> <id>pro_env</id> <!--定义环境中换用的属性值--> <properties> <mydb.url>jdbc:mysql://47.93.122.38:3306/ssm?useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true</mydb.url> </properties> <!--设置默认启动--> <activation> <activeByDefault>false</activeByDefault> </activation> </profile> <!--定义具体的环境：开发环境--> <profile> <id>dep_env</id> <properties> <mydb.url>jdbc:mysql://47.92.123.111:3306/ssm?useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true</mydb.url> </properties> <!--设置默认启动--> <activation> <activeByDefault>true</activeByDefault> </activation> </profile> </profiles>
5. 跳过测试
!
- 作 者 : Yaopengfei(姚鹏飞)
- 博客地址 : http://www.cnblogs.com/yaopengfei/
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