maven教程5(聚合工程)

所谓聚合项目，实际上就是对项目分模块，互联网项目一般来说按照业务分（订单模块、VIP模块、支付模块、CMS模块...），传统的软件项目，大多采用分层的方式(Dao、Serivce、Controller)：

一、多模块结构

bobo-parent       pom  管理 
	|-- bobo-manager   pom 管理
		|-- bobo-manager-dao     jar
		|-- bobo-manager-service jar
		|-- bobo-manager-model   jar
		|-- bobo-manager-commons jar
		|-- bobo-manager-controller war

二、创建项目

1.创建bobo-parent

pom文件不需要写代码，只是起管理作用

2.创建bobo-manager项目

指定bobo-parent为其父项目

3.分别创建四个jar项目

项目类型为 maven model

相同的步骤创建其他3个jar项目

4.创建bobo-manager-controller项目

<dependencies> 
	<!-- 因为是web项目所以需要servlet --> <!-- https://mvnrepository.com/artifact/javax.servlet/servlet-api -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>2.5</version>
			<scope>provided</scope>
		</dependency>
	</dependencies>
	<build>
		<plugins> <!-- tomcat插件 -->
			<plugin>
				<groupId>org.apache.tomcat.maven</groupId>
				<artifactId>tomcat7-maven-plugin</artifactId>
				<version>2.2</version>
				<configuration> <!-- 端口号 -->
					<port>8082</port> <!-- /表示访问路径 省略项目名 -->
					<path>/</path> <!-- 设置编码方式 -->
					<uriEncoding>utf-8</uriEncoding>
				</configuration>
			</plugin>
		</plugins>
	</build>

三、设置相互依赖

1.依赖关系介绍

完整依赖关系

graph LR A[controller] --依赖 --> B[service] B --依赖--> C[dao] C --依赖--> D[model] C--依赖-->E[commons]

控制层的依赖关系

graph LR A[controller] --依赖 --> B[service] A --依赖--> C[dao] A --依赖--> D[model] A--依赖-->E[commons]

service层的依赖关系

graph LR B[service] --依赖--> C[dao] B --依赖--> D[model] B--依赖-->E[commons]

dao层的依赖关系

graph LR C[dao] --依赖--> D[model] C--依赖-->E[commons]

2.实现依赖关系

2.1项目打包

1.先对bobo-parent项目打包

本地仓库就会生成打包的内容

2.再对bobo-manager项目打包

成功后本地仓库

2.2添加依赖关系

1.controller依赖service

<!-- 配置依赖的service坐标 -->
<dependency>
	<groupId>com.dpb</groupId>
    <artifactId>bobo-manager-service</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</dependency>

2.service依赖dao

<!-- 配置依赖的Dao坐标 -->
<dependency>
	<groupId>com.dpb</groupId>
    <artifactId>bobo-manager-dao</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</dependency>

同时controller也会依赖dao，间接依赖

3.dao依赖model和Commons

 <dependencies>
 	<!-- 配置依赖的model和Commons的坐标 -->
	<dependency>
		<groupId>com.dpb</groupId>
	    <artifactId>bobo-manager-model</artifactId>
	    <version>0.0.1-SNAPSHOT</version>
	</dependency>
	<dependency>
		<groupId>com.dpb</groupId>
	    <artifactId>bobo-manager-commons</artifactId>
	    <version>0.0.1-SNAPSHOT</version>
	</dependency>
 </dependencies>

3.Spring和SpringMVC整合

3.1在dao中引入spring

<properties>
		<spirng.version>4.3.3.RELEASE</spirng.version>
	</properties>
	<dependencies>
		<!-- 配置依赖的model和Commons的坐标 -->
		<dependency>
			<groupId>com.dpb</groupId>
			<artifactId>bobo-manager-model</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>
		<dependency>
			<groupId>com.dpb</groupId>
			<artifactId>bobo-manager-commons</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>

		<!-- 1.spring相关的jar包 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spirng.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${spirng.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spirng.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>${spirng.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spirng.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-expression</artifactId>
			<version>${spirng.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId>
			<version>${spirng.version}</version>
		</dependency>
		
		<!-- https://mvnrepository.com/artifact/log4j/log4j -->
	<dependency>
	    <groupId>log4j</groupId>
	    <artifactId>log4j</artifactId>
	    <version>1.2.17</version>
	</dependency>
		<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core -->
	<dependency>
	    <groupId>org.apache.logging.log4j</groupId>
	    <artifactId>log4j-core</artifactId>
	    <version>2.6.2</version>
	</dependency>
	<!-- 数据库驱动包 这个是从私服上关联的-->
	<dependency>
	  <groupId>com.dpb.oracle</groupId>
	  <artifactId>ojdbc6-dpb</artifactId>
	  <version>1.0.0</version>
	</dependency>
	</dependencies>

3.2在controller中引入springmvc

在controller中添加的是其他项目不需要用的jar包，比如servlet。

	<properties>
		<spirng.version>4.3.3.RELEASE</spirng.version>
	</properties>

	<dependencies>
		<!-- 因为是web项目所以需要servlet -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>2.5</version>
			<scope>provided</scope>
		</dependency>
		<!-- 配置依赖的service坐标 -->
		<dependency>
			<groupId>com.dpb</groupId>
			<artifactId>bobo-manager-service</artifactId>
			<version>0.0.1-SNAPSHOT</version>
		</dependency>

		<!-- 2.和springMvc相关的jar包 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spirng.version}</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/jstl/jstl -->
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
	</dependencies>

spring配置文件

<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"
	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-4.3.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

	<!-- 开启扫描 -->
	<context:component-scan base-package="com.dpb.service.impl,com.dpb.dao.impl">
		<!-- 扫描的时候显示的排除controller注解 -->
		<context:exclude-filter type="annotation"
			expression="org.springframework.stereotype.Controller" />
	</context:component-scan>

	<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource"
		id="ds">
		<property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl" />
		<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
		<property name="username" value="pms" />
		<property name="password" value="pms" />
	</bean>
	<bean class="org.springframework.jdbc.core.JdbcTemplate" id="jdbcTemplate">
		<constructor-arg name="dataSource" ref="ds"/>
	</bean>
</beans>

SpringMVC的配置文件

<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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
		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-4.3.xsd">

	<!-- 开启注解 -->
	<mvc:annotation-driven ></mvc:annotation-driven>
	<!-- 开启扫描 -->
	<context:component-scan base-package="com.dpb.controller">
		<!-- 只扫描指定路径下的controller注解 -->
		<context:include-filter type="annotation" 
		expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>
</beans>

3.3在controller中配置web.xml文件

<?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"
	id="WebApp_ID" version="2.5" >
	
	<!-- 这里配置Spring配置文件的位置，param-name是固定的， param-value是文件位置 这个配置可以省略，
	如果省略， 系统默认去/WEB-INF/目录下查找applicationContext.xml作为Spring的配置文件 -->
	<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>

	<!-- 前端控制器 -->
	<servlet>
		<servlet-name>spring-mvc</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>spring-mvc</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	<filter>
		<filter-name>encodingFilter</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>encodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	<servlet-mapping>
		<servlet-name>default</servlet-name>
		<url-pattern>*.jpg</url-pattern>
	</servlet-mapping>
	<servlet-mapping>
		<servlet-name>default</servlet-name>
		<url-pattern>*.js</url-pattern>
	</servlet-mapping>
	<servlet-mapping>
		<servlet-name>default</servlet-name>
		<url-pattern>*.css</url-pattern>
	</servlet-mapping>
</web-app>	

3.4实现查询操作

1.在bobo-manager-model中创建User对象

public class User {

	private int id;
	
	private String uname;
	
	private String nickname;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getUname() {
		return uname;
	}

	public void setUname(String uname) {
		this.uname = uname;
	}

	public String getNickname() {
		return nickname;
	}

	public void setNickname(String nickname) {
		this.nickname = nickname;
	}
}

2.在bobo-manager-dao实现数据库操作

public interface IUserDao {

	public List<User> query();
}

@Repository
public class UserDaoImpl implements IUserDao {
	
	@Resource
	JdbcTemplate jdbcTemplate;

	@Override
	public List<User> query() {
		String sql = "select * from t_sysuser";
		return jdbcTemplate.query(sql, new BeanPropertyRowMapper<User>(User.class));
	}

}

3.在bobo-manager-service中操作Dao

public interface IUserService {
	
	public List<User> query();
	
}

@Service
public class UserServiceImpl implements IUserService {
	
	@Resource
	private IUserDao dao;

	@Override
	public List<User> query() {
		// TODO Auto-generated method stub
		return dao.query();
	}

}

4.在bobo-manager-controller中处理请求响应

@Controller
public class UserController {

	@Resource
	private IUserService userService;
	
	@RequestMapping("/query")
	public String query(Model m){
		m.addAttribute("list", userService.query());
		return "/user.jsp";
	}
}

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<c:forEach items="${list }" var="u">
		${u.id } --${u.uname }--${u.nickname }<br>
	</c:forEach>
</body>
</html>

5.测试

对bobo-manager打包

然后启动 bobo-manager-controller项目

成功!!!