maven-聚合工程

亦凉 2022-04-24 11:30 296阅读 0赞

# 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、Service、Controller）

## 一、多模块结构 ##

![在这里插入图片描述][20190424210403489.png]  
![在这里插入图片描述][20190424210709835.png]

## 二、创建项目 ##

#### 1.创建sxt-parent ####

**pom文件不需要写代码，只是起管理作用** pom  
![在这里插入图片描述][20190424210823111.png]

#### 2.创建sxt-manager项目 ####

**指定sxt-parent为其父项目** pom  
![在这里插入图片描述][20190424211025514.png]

#### 3.分别创建四个jar项目 ####

**项目类型为：maven model** jar  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUwMjgwNA_size_16_color_FFFFFF_t_70]

#### 4.创建sxt-manager-web ####

**项目类型为：maven model** war  
![在这里插入图片描述][20190424211725454.png]

##### war项目有错误提示，需要在pom.xml中添加servlet 和Tomcat插件 #####

![在这里插入图片描述][20190424212021637.png]  
servlet:

<dependency>
    			<groupId>javax.servlet</groupId>
    			<artifactId>servlet-api</artifactId>
    			<version>2.5</version>
    			<scope>provided</scope>
    		</dependency>

Tomcat插件：

<build>
    		<plugins> 
    			<plugin>
    				<groupId>org.apache.tomcat.maven</groupId>
    				<artifactId>tomcat7-maven-plugin</artifactId>
    				<version>2.2</version>
    				<configuration> 
    					<port>8082</port> 
    					<path>/</path> 
    					<uriEncoding>utf-8</uriEncoding>
    				</configuration>
    			</plugin>
    		</plugins>
    	</build>

##### 添加web.xml文件： #####

![在这里插入图片描述][20190424212540543.png]

## 三：设置相互依赖 ##

### 1.依赖关系介绍： ###

**完整依赖关系：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUwMjgwNA_size_16_color_FFFFFF_t_70 1]  
**控制层的依赖关系：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUwMjgwNA_size_16_color_FFFFFF_t_70 2]  
**service层的依赖关系**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUwMjgwNA_size_16_color_FFFFFF_t_70 3]  
**dao层的依赖关系**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUwMjgwNA_size_16_color_FFFFFF_t_70 4]

### 2.实现依赖 ###

#### 2.1添加依赖关系 ####

**在各层的pom.xml中添加依赖**  
dao pom.xml：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUwMjgwNA_size_16_color_FFFFFF_t_70 5]

<dependencies>
      	<dependency>
      		<groupId>com.sxt</groupId>
        	<artifactId>sxt-manager-common</artifactId>
        	<version>0.0.1-SNAPSHOT</version>
      	</dependency>
      	<dependency>
      		<groupId>com.sxt</groupId>
        	<artifactId>sxt-manager-model</artifactId>
        	<version>0.0.1-SNAPSHOT</version>
      	</dependency>

service 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.sxt</groupId>
        <artifactId>sxt-manager</artifactId>
        <version>0.0.1-SNAPSHOT</version>
      </parent>
      <artifactId>sxt-manager-service</artifactId>
      
      
      <dependencies>
      	<dependency>
      		<groupId>com.sxt</groupId>
        	<artifactId>sxt-manager-dao</artifactId>
        	<version>0.0.1-SNAPSHOT</version>
      	</dependency>
      </dependencies>
    </project>

web pom.xml:

<dependencies>
      	<dependency>
      		<groupId>com.sxt</groupId>
        	<artifactId>sxt-manager-service</artifactId>
       	 	<version>0.0.1-SNAPSHOT</version>
      	</dependency>

#### 2.2 项目打包 ####

**先打包sxt-parent,再打包sxt-manager.  
注意打包sxt-manager的时候会一起打包它的五个子项目。能一起打包成功是最好的情况，但失败的话就一个一个打包没打包成功的子项目。**

项目打包：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUwMjgwNA_size_16_color_FFFFFF_t_70 6]  
打包成功：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUwMjgwNA_size_16_color_FFFFFF_t_70 7]  
打包成功后的本地仓库：  
![在这里插入图片描述][20190424215646550.png]  
打包成功的jar包：  
![在这里插入图片描述][20190424215741165.png]

### 3.Spring和SpringMVC整合 ###

#### 3.1在dao中引入spring ####

<dependency>
       	   <groupId>org.springframework</groupId>
      	   <artifactId>spring-context</artifactId>
       		<version>4.3.21.RELEASE</version>
    	</dependency>
    
      	
    	<dependency>
        	<groupId>mysql</groupId>
        	<artifactId>mysql-connector-java</artifactId>
       		 <version>5.1.47</version>
    	</dependency>
    	
    	<dependency>
        	<groupId>org.springframework</groupId>
       	 	<artifactId>spring-aop</artifactId>
        	<version>4.3.21.RELEASE</version>
    	</dependency>
    	
      	
    	<dependency>
        	<groupId>org.aspectj</groupId>
        	<artifactId>aspectjweaver</artifactId>
        	<version>1.8.9</version>
    	</dependency>
      	
      	
      	
    	<dependency>
        	<groupId>org.springframework</groupId>
       		 <artifactId>spring-orm</artifactId>
       		 <version>4.3.21.RELEASE</version>
    	</dependency>

#### 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

<dependency>
        	<groupId>org.springframework</groupId>
        	<artifactId>spring-webmvc</artifactId>
        	<version>4.3.21.RELEASE</version>
    	</dependency>
    		
    		
    	<dependency>
        	<groupId>javax.servlet.jsp.jstl</groupId>
        	<artifactId>jstl</artifactId>
       		 <version>1.2</version>
    	</dependency>
    		
    		
    	
    	<dependency>
        	<groupId>taglibs</groupId>
        	<artifactId>standard</artifactId>
        	<version>1.1.2</version>
    	</dependency>
    	
    	
    	<dependency>
       		 <groupId>com.alibaba</groupId>
       		 <artifactId>fastjson</artifactId>
      		  <version>1.2.47</version>
    	</dependency>

#### 3.3添加Spring和SpringMVC配置文件： ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUwMjgwNA_size_16_color_FFFFFF_t_70 8]

#### Spring配置文件： ####

<?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: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">
    
    	
    	<context:component-scan base-package="com.sxt.service.impl,com.sxt.dao.impl" use-default-filters="true">
    		<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    	</context:component-scan>
    
    	
    	
    	<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource"
    		id="dataSource">
    		
    		<property name="driverClassName" value="com.mysql.jdbc.Driver" />
    		<property name="url"
    			value="jdbc:mysql://localhost:3306/login?characterEncoding=utf-8" />
    		<property name="username" value="root" />
    		<property name="password" value="tang123" />
    	</bean>
    
    
    	
    	<bean class="org.springframework.jdbc.core.JdbcTemplate" id="template">
    		
    		<constructor-arg ref="dataSource"/>
    	</bean>
    	
    </beans>

#### SpringMVC: ####

#### 3.4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_3_0.xsd" id="WebApp_ID" version="3.0">
      <display-name>SpringMVC-01</display-name>
      <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
      </welcome-file-list>
      
      
    		 <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>
    	
      
      <servlet>
      	<servlet-name>SpringMVC</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>SpringMVC</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>
    		<init-param> 
    			<param-name>forceRequestEncoding</param-name>
    			<param-value>true</param-value>
    		</init-param>
    		<init-param>
    			<param-name>forceResponseEncoding</param-name>
    			<param-value>true</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>*.js</url-pattern>
    	</servlet-mapping>
    </web-app>

### 实现查询的操作： ###

#### 1.在sxt-manager-model中创建User对象 ####

![在这里插入图片描述][20190424221111972.png]  
User:

package com.sxt.pojo;
    
    public class User {
    	private int id;
    	private String username;
    	private String password;
    	public int getId() {
    		return id;
    	}
    	public void setId(int id) {
    		this.id = id;
    	}
    	public String getUsername() {
    		return username;
    	}
    	public void setUsername(String username) {
    		this.username = username;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {`在这里插入代码片`
    		this.password = password;
    	}
    	@Override
    	public String toString() {
    		return "User [id=" + id + ", username=" + username + ", password=" + password + "]";
    	}
    	
    }

#### 2.在sxt-manager-dao实现数据库操作 ####

![在这里插入图片描述][20190424221240463.png]  
dao:

package com.sxt.dao;
    
    import java.util.List;
    
    import com.sxt.pojo.User;
    
    public interface IUserDao {
    	public List<User> query();
    }

dao.impl:

package com.sxt.dao.impl;
    
    import java.util.List;
    
    import javax.annotation.Resource;
    
    import org.springframework.jdbc.core.BeanPropertyRowMapper;
    import org.springframework.jdbc.core.JdbcTemplate;
    import org.springframework.stereotype.Repository;
    
    import com.sxt.dao.IUserDao;
    import com.sxt.pojo.User;
    @Repository
    public class UserDaoImpl implements IUserDao {
    
    	@Resource
    	private JdbcTemplate jdbcTemplate;
    
    	@Override
    	public List<User> query() {
    		String sql = "select * from t_user";
    		return jdbcTemplate.query(sql, new BeanPropertyRowMapper<User>(User.class));
    	}
    
    }

#### 3.在sxt-manager-service中操作Dao ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUwMjgwNA_size_16_color_FFFFFF_t_70 9]  
service:

package com.sxt.service;
    
    import java.util.List;
    
    import com.sxt.pojo.User;
    
    public interface IUserService {
    	public List<User> query();
    }

service.impl:

package com.sxt.service.impl;
    
    import java.util.List;
    
    import javax.annotation.Resource;
    
    import org.springframework.stereotype.Service;
    
    import com.sxt.dao.IUserDao;
    import com.sxt.pojo.User;
    import com.sxt.service.IUserService;
    
    @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sxt-manager-web中处理请求响应 ####

![在这里插入图片描述][20190424221700125.png]  
controller:

package com.sxt.controller;
    
    import java.util.List;
    
    import javax.annotation.Resource;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.sxt.pojo.User;
    import com.sxt.service.IUserService;
    
    @RestController
    public class UserController {
    
    	@Resource
    	private IUserService userService;
    	
    	@RequestMapping("/query")
    	public List<User> query(){
    		return userService.query();
    	}
    }

#### 5.实现： ####

![在这里插入图片描述][2019042422182181.png]

[20190424210403489.png]: /images/20220215/46b09572f0f74dada5d1509de94bcdca.png
[20190424210709835.png]: /images/20220215/4b2c294f828c48a9b5639a13f77e3b94.png
[20190424210823111.png]: /images/20220215/a44190cbfd804e86838078eead5d3d3e.png
[20190424211025514.png]: /images/20220215/bdbf88d648ad477e8731fd6725fb3f46.png
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[20190424211725454.png]: /images/20220215/eaeebffb856348059dabe32dcc4eea01.png
[20190424212021637.png]: /images/20220215/8bb2c61ac60b4fab8fc79979ebf5dbbb.png
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[20190424215646550.png]: /images/20220215/564c80171328474ab2646df8f84d0682.png
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[20190424221111972.png]: /images/20220215/874d85690228448ca0f27c59d2aee727.png
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