maven分模組構建專案工程
分模組構建工程
基於上邊的三個工程分析,我們將持久層，業務層、控制器和試圖表現層可以分為三個不同的模組來處理，建立一個parent工程將通用的pom配置抽取出來，然後聚合多個模組執行。
3.1需求
3.1.1需求描述
將SSM工程拆分為多個模組開發：
Dao模組
Service模組
Web模組
3.1.2理解繼承和聚合
通常繼承和聚合同時使用。
- 何為繼承？
繼承是為了消除重複，如果將dao、service、web分開建立獨立的工程則每個工程的pom.xml檔案中的內容存在重複，如設定編譯版本、鎖定spring的版本的等，可以將這些重複的配置提取出來在父工程的pom.xml中定義。
- 何為聚合？
開發通常是分組分模組開發，每個模組開發完成要執行整個工程需要將每個模組聚合在一起執行，比如：dao、service、web三個工程最終會打一個獨立的war執行。
3.2案例實現
3.2.1 ssm-parent父模組
3.2.1.1建立父工程
這裡選擇“跳過骨架選擇”
定義座標：
3.2.1.2定義pom.xml
在父工程的pom.xml中抽取一些重複的配置的，比如：鎖定jar包的版本、設定編譯版本等。
| <project xmlns="http://maven.apache.org/POM/4.0.0" 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.igeekhome.ssm</groupId> < <version>0.0.1-SNAPSHOT</version> <packaging>pom</packaging>
<properties> <junit.version>4.12</junit.version> <servlet-api.version>3.0-alpha-1</servlet-api.version> <spring.version>4.3.6.RELEASE</spring.version> <mybatis.version>3.4.2</mybatis.version> <mybatis-spring.version>1.3.1</mybatis-spring.version> <mysql.version>5.1.19</mysql.version> <druid.version>1.0.28</druid.version> <aspectjweaver.version>1.8.10</aspectjweaver.version> <slf4j.version>1.7.24</slf4j.version> <log4j.version>1.2.17</log4j.version> <jstl.version>1.2</jstl.version> </properties>
<!-- 新增工程的依賴 --> <dependencyManagement> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> <scope>test</scope> </dependency> <!-- servlet-api JSP頁面編譯時需要的包 --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>${servlet-api.version}</version> <scope>provided</scope> </dependency> <!-- Spring 以及 SpringMVC需要引入的包，自動引入需要參照的包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <!-- 持久層的包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <!-- Spring 和 Mybatis的整合包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis-spring.version}</version> </dependency> <!-- Mysql驅動包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <!-- druid資料庫連線池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druid.version}</version> </dependency>
<dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>${aspectjweaver.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <!-- 打日誌的 --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> <scope>runtime</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>${slf4j.version}</version> <scope>runtime</scope> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> <scope>runtime</scope> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>${jstl.version}</version> <scope>provided</scope> </dependency> </dependencies> </dependencyManagement> <build> <finalName>ssm</finalName> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> <include>**/*.properties</include> </includes> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.xml</include> <include>**/*.properties</include> <include>**/*.ini</include> </includes> </resource> </resources> <pluginManagement> <plugins> <!-- 設定編譯版本為1.8 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin>
<!-- Jetty外掛，提供一種web容器 --> <plugin> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-maven-plugin</artifactId> <version>9.4.2.v20170220</version> <configuration> <httpConnector> <!-- 配置執行的埠號 --> <port>80</port> </httpConnector> <!-- 配置掃描的時間間隔 --> <scanIntervalSeconds>1</scanIntervalSeconds> <webApp> <!-- 配置上下文 --> <contextPath>/ssm</contextPath> </webApp> </configuration> </plugin> </plugins> </pluginManagement> </build> </project> |
3.2.1.3將父工程釋出至倉庫
父工程建立完成執行maven-install將父工程釋出到倉庫方便子工程繼承：
3.2.2ssm-dao子模組
3.2.2.1建立dao子模組
選擇ssm-parent工程新增模組
這裡指定模組名稱，選擇“跳過骨架選擇”，並設定模組名稱
3.2.2.2定義pom.xml
dao模組的pom.xml檔案中需要繼承父模組，新增持久層需要的依賴座標：
| <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> <parent> <groupId>com.igeekhome.ssm</groupId> <artifactId>ssm-parent</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <artifactId>ssm-dao</artifactId> <packaging>jar</packaging>
<dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <scope>test</scope> </dependency> <!-- 持久層的包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> </dependency> <!-- Spring 和 Mybatis的整合包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> </dependency> <!-- Mysql驅動包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <!-- druid資料庫連線池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> </dependency> </dependencies> </project> |
3.2.2.3dao
將ssm工程中的dao介面，mapper配置檔案及domain類拷貝到src/main/java中：
3.2.2.4配置檔案
拷貝ssm工程中如下配置檔案到dao工程：
3.2.2.5單元測試
| package com.igeekhome.ssm.tests;
import org.junit.Test; import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.igeekhome.ssm.dao.EmployeeMapper; import com.igeekhome.ssm.domain.Employee;
public class EmployeeTest {
@Test public void testFindEmployeeById(){ //載入配置檔案 ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(new String[]{"applicationContext.xml", "spring-mybatis.xml"}); //獲取dao EmployeeMapper employeeMapper = applicationContext.getBean(EmployeeMapper.class); //查詢資料 Employee employee = employeeMapper.selectByPrimaryKey(7369); //檢視資料 System.out.println(employee.getEname()); //關閉上下文 applicationContext.close(); } } |
3.2.3ssm-service子模組
3.2.3.1建立service子模組
方法同ssm-dao模組建立方法，模組名稱為ssm-service。
3.2.3.2定義pom.xml
service模組的pom.xml檔案中需要繼承父模組，service依賴dao模組：
| <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> <parent> <groupId>com.igeekhome.ssm</groupId> <artifactId>ssm-parent</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <artifactId>ssm-service</artifactId> <packaging>jar</packaging>
<dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>com.igeekhome.ssm</groupId> <artifactId>ssm-dao</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> </dependencies> </project> |
3.2.3.3service介面
將ssm工程中的service介面拷貝到src/main/java中：
3.2.3.4配置檔案
拷貝ssm工程中如下配置檔案到service工程：
3.2.3.5單元測試
| package com.igeekhome.ssm.tests;
import org.junit.Test; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.igeekhome.ssm.domain.Employee; import com.igeekhome.ssm.service.EmployeeService;
public class EmployeeTest {
@Test public void testFindEmployeeById(){ //載入配置檔案 ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(new String[]{"applicationContext.xml", "spring-mybatis.xml"}); //獲取dao EmployeeService employeeService = applicationContext.getBean(EmployeeService.class); //查詢資料 Employee employee = employeeService.selectByPrimaryKey(7369); //檢視資料 System.out.println(employee.getEname()); //關閉上下文 applicationContext.close(); } } |
3.2.4ssm-web子模組
3.2.4.1建立web子模組
方法同ssm-dao模組建立方法，模組名稱為ssm-web。
3.2.4.2定義pom.xml
| <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> <parent> <groupId>com.igeekhome.ssm</groupId> <artifactId>ssm-parent</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <artifactId>ssm-web</artifactId> <packaging>war</packaging> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <scope>test</scope> </dependency> <!-- servlet-api JSP頁面編譯時需要的包 --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <scope>provided</scope> </dependency> <!-- Sprin |