Maven心得二

其他 2018-10-30 23:21:14 阅读次数: 0
版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/LiuY521/article/details/80256448

1 回顾

1.1 Maven的好处

节省空间 对jar包做了统一管理 依赖管理

一键构建

可跨平台

应用在大型项目可提高开发效率

1.2 Maven安装部署配置

1.3 Maven的仓库

本地仓库

远程仓库（私服）

中央仓库

1.4 添加依赖

从网络上搜索

在本地重建索引，以索引的方式搜索

1.5 项目构建

1.6 依赖范围

Compile   struts2 框架jar

Provided   jsp-api.jar     重点

Runtime   数据库驱动包

Test   junit.jar

1.7 总结

<modelVersion>  

坐标  GAV

<groupId>cn.itcast</groupId>

<artifactId>ssh</artifactId>

<version>0.0.1-SNAPSHOT</version>

Packaging  打包方式  

Jar  war  pom

<dependencies>

 <dependency>

<build>  里面放的是插件

<plugins>

 <plugin>

2 整合ssh框架

2.1 依赖传递

只添加了一个struts2-core依赖，发现项目中出现了很多jar，

这种情况 叫 依赖传递

 

2.2 依赖版本冲突的解决

1、 第一声明优先原则

<dependencies>
  <!--   spring-beans-4.2.4 -->
  	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-context</artifactId>
  		<version>4.2.4.RELEASE</version>
  	</dependency>
  
  
<!--   spring-beans-3.0.5 -->
  	<dependency>
  		<groupId>org.apache.struts</groupId>
  		<artifactId>struts2-spring-plugin</artifactId>
  		<version>2.3.24</version>
  	</dependency>
 <!--   spring-beans-3.0.5 -->

  <dependency>

  <groupId>org.apache.struts</groupId>

  <artifactId>struts2-spring-plugin</artifactId>

  <version>2.3.24</version>

  </dependency>

2、 路径近者优先原则

自己添加jar包

	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-beans</artifactId>
  		<version>4.2.4.RELEASE</version>
  	</dependency>

3、 排除原则

<dependency>
  		<groupId>org.apache.struts</groupId>
  		<artifactId>struts2-spring-plugin</artifactId>
  		<version>2.3.24</version>
  		<exclusions>
  		  <exclusion>
  		    <groupId>org.springframework</groupId>
  		    <artifactId>spring-beans</artifactId>
  		  </exclusion>
  		</exclusions>
  	</dependency>

4、 版本锁定原则

<properties>
		<spring.version>4.2.4.RELEASE</spring.version>
		<hibernate.version>5.0.7.Final</hibernate.version>
		<struts.version>2.3.24</struts.version>
	</properties>

	<!-- 锁定版本，struts2-2.3.24、spring4.2.4、hibernate5.0.7 -->
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework</groupId>
				<artifactId>spring-context</artifactId>
				<version>${spring.version}</version>
			</dependency>
</dependencies>
</dependencyManagement>

需求：

传客户ID 页面上显示客户信息

准备数据库

2.3 构建项目

1、 创建数据库，

 

2、 执行准备好的sql脚本

Sql脚本的位置：

 

3、 完善pom.xml文件，把ssh相关的依赖都添加上去

 <!-- 属性 -->
	<properties>
		<spring.version>4.2.4.RELEASE</spring.version>
		<hibernate.version>5.0.7.Final</hibernate.version>
		<struts.version>2.3.24</struts.version>
	</properties>

	<!-- 锁定版本，struts2-2.3.24、spring4.2.4、hibernate5.0.7 -->
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework</groupId>
				<artifactId>spring-context</artifactId>
				<version>${spring.version}</version>
			</dependency>
			<dependency>
				<groupId>org.springframework</groupId>
				<artifactId>spring-aspects</artifactId>
				<version>${spring.version}</version>
			</dependency>
			<dependency>
				<groupId>org.springframework</groupId>
				<artifactId>spring-orm</artifactId>
				<version>${spring.version}</version>
			</dependency>
			<dependency>
				<groupId>org.springframework</groupId>
				<artifactId>spring-test</artifactId>
				<version>${spring.version}</version>
			</dependency>
			<dependency>
				<groupId>org.springframework</groupId>
				<artifactId>spring-web</artifactId>
				<version>${spring.version}</version>
			</dependency>
			<dependency>
				<groupId>org.hibernate</groupId>
				<artifactId>hibernate-core</artifactId>
				<version>${hibernate.version}</version>
			</dependency>
			<dependency>
				<groupId>org.apache.struts</groupId>
				<artifactId>struts2-core</artifactId>
				<version>${struts.version}</version>
			</dependency>
			<dependency>
				<groupId>org.apache.struts</groupId>
				<artifactId>struts2-spring-plugin</artifactId>
				<version>${struts.version}</version>
			</dependency>
		</dependencies>
	</dependencyManagement>
	<!-- 依赖管理 -->
	<dependencies>
		<!-- spring -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
		</dependency>
		<!-- hibernate -->
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
		</dependency>

		<!-- 数据库驱动 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.6</version>
			<scope>runtime</scope>
		</dependency>
		<!-- c3p0 -->

		<dependency>
			<groupId>c3p0</groupId>
			<artifactId>c3p0</artifactId>
			<version>0.9.1.2</version>
		</dependency>


		<!-- 导入 struts2 -->
		<dependency>
			<groupId>org.apache.struts</groupId>
			<artifactId>struts2-core</artifactId>
		</dependency>
		<dependency>
			<groupId>org.apache.struts</groupId>
			<artifactId>struts2-spring-plugin</artifactId>
		</dependency>

		<!-- servlet jsp -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>2.5</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jsp-api</artifactId>
			<version>2.0</version>
			<scope>provided</scope>
		</dependency>
		<!-- 日志 -->
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>1.7.2</version>
		</dependency>
		<!-- junit -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.9</version>
			<scope>test</scope>
		</dependency>
		<!-- jstl -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<!-- 设置编译版本为1.7 -->
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<configuration>
					<source>1.7</source>
					<target>1.7</target>
					<encoding>UTF-8</encoding>
				</configuration>
			</plugin>

			<!-- maven内置 的tomcat6插件 -->
			<plugin>
				<groupId>org.codehaus.mojo</groupId>
				<artifactId>tomcat-maven-plugin</artifactId>
				<version>1.1</version>
				<configuration>
					<!-- 可以灵活配置工程路径 -->
					<path>/ssh</path>
					<!-- 可以灵活配置端口号 -->
					<port>8080</port>
				</configuration>
			</plugin>
		</plugins>
	</build>

4、 完成实体类代码

 

5、 完成dao代码

接口

package cn.itcast.dao;

import cn.itcast.entity.Customer;

public interface CustomerDao {
	
	public Customer getById(Long id);

}

实现类

package com.itcast.dao.impl;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import cn.itcast.dao.CustomerDao;
import cn.itcast.entity.Customer;
public class CustomerDaoImpl extends HibernateDaoSupport implements CustomerDao {
	@Override
	public Customer getById(Long id) {
		return this.getHibernateTemplate().get(Customer.class, id);
	}
}

 6、 完成service代码

接口

package com.itcast.service;

import cn.itcast.entity.Customer;

public interface CustomerService {

public Customer getById(Long id);

}

实现类

package com.itcast.service.impl;

import com.itcast.service.CustomerService; 

import cn.itcast.dao.CustomerDao;

import cn.itcast.entity.Customer;

public class CustomerServiceImpl implements CustomerService {

private CustomerDao  customerDao;

public void setCustomerDao(CustomerDao customerDao) {

this.customerDao = customerDao;

}

@Override

public Customer getById(Long id) {

return customerDao.getById(id);

}

}

 7、 完成action代码

package cn.itcast.action;

import com.itcast.service.CustomerService;

import com.opensymphony.xwork2.ActionSupport;

import cn.itcast.entity.Customer;

public class CutomerAction extends ActionSupport {

//两个成员变量

private Customer  customer;

private Long custId;

public Customer getCustomer() {

return customer;

}

public void setCustomer(Customer customer) {

this.customer = customer;

}

private CustomerService customerService;

public void setCustomerService(CustomerService customerService) {

this.customerService = customerService;

}

public Long getCustId() {

return custId;

}

public void setCustId(Long custId) {

this.custId = custId;

}

public String findById(){

customer = customerService.getById(custId);

return SUCCESS;

}

}

8、 拷贝配置文件并修改

从如下图位置拿到配置文件



放入到 src/main/resources目录中


修改内容 略

9、 修改web.xml 添加spring的监听 

<listener>

 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath:applicationContext.xml</param-value>

</context-param>

10、 运行项目

3 分模块开发

依赖范围对依赖传递造成的影响（了解）


父工程来管理   聚合

3.1 创建父工程：

1、

2、创建出的父工程如下

 

3、在pom.Xml中添加以下信息：

  <!-- 属性 -->

<properties>

<spring.version>4.2.4.RELEASE</spring.version>

<hibernate.version>5.0.7.Final</hibernate.version>

<struts.version>2.3.24</struts.version>

</properties>

 

<!-- 锁定版本，struts2-2.3.24、spring4.2.4、hibernate5.0.7 -->

<dependencyManagement>

<dependencies>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-context</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-aspects</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-orm</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-test</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-web</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.hibernate</groupId>

<artifactId>hibernate-core</artifactId>

<version>${hibernate.version}</version>

</dependency>

<dependency>

<groupId>org.apache.struts</groupId>

<artifactId>struts2-core</artifactId>

<version>${struts.version}</version>

</dependency>

<dependency>

<groupId>org.apache.struts</groupId>

<artifactId>struts2-spring-plugin</artifactId>

<version>${struts.version}</version>

</dependency>

</dependencies>

</dependencyManagement>

<!-- 依赖管理 -->

<dependencies>

<!-- spring -->

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-context</artifactId>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-aspects</artifactId>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-orm</artifactId>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-test</artifactId>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-web</artifactId>

</dependency>

<!-- hibernate -->

<dependency>

<groupId>org.hibernate</groupId>

<artifactId>hibernate-core</artifactId>

</dependency>

 

<!-- 数据库驱动 -->

<dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

<version>5.1.6</version>

<scope>runtime</scope>

</dependency>

<!-- c3p0 -->

 

<dependency>

<groupId>c3p0</groupId>

<artifactId>c3p0</artifactId>

<version>0.9.1.2</version>

</dependency>

 

 

<!-- 导入 struts2 -->

<dependency>

<groupId>org.apache.struts</groupId>

<artifactId>struts2-core</artifactId>

</dependency>

<dependency>

<groupId>org.apache.struts</groupId>

<artifactId>struts2-spring-plugin</artifactId>

</dependency>

 

<!-- servlet jsp -->

<dependency>

<groupId>javax.servlet</groupId>

<artifactId>servlet-api</artifactId>

<version>2.5</version>

<scope>provided</scope>

</dependency>

<dependency>

<groupId>javax.servlet</groupId>

<artifactId>jsp-api</artifactId>

<version>2.0</version>

<scope>provided</scope>

</dependency>

<!-- 日志 -->

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-log4j12</artifactId>

<version>1.7.2</version>

</dependency>

<!-- junit -->

<dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

<version>4.9</version>

<scope>test</scope>

</dependency>

<!-- jstl -->

<dependency>

<groupId>javax.servlet</groupId>

<artifactId>jstl</artifactId>

<version>1.2</version>

</dependency>

</dependencies>

 

<build>

<plugins>

<!-- 设置编译版本为1.7 -->

<plugin>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-compiler-plugin</artifactId>

<configuration>

<source>1.7</source>

<target>1.7</target>

<encoding>UTF-8</encoding>

</configuration>

</plugin>

 

<!-- maven内置 的tomcat6插件 -->

<plugin>

<groupId>org.codehaus.mojo</groupId>

<artifactId>tomcat-maven-plugin</artifactId>

<version>1.1</version>

<configuration>

<!-- 可以灵活配置工程路径 -->

<path>/ssh</path>

<!-- 可以灵活配置端口号 -->

<port>8080</port>

</configuration>

</plugin>

 

</plugins>

</build>

4、发布到本地仓库

  dao  service  web

3.2 创建dao子模块

1、在ssh-parent项目上右击 ，创建时选择 Maven Module

 

2、填写子模块名称ssh-dao

 

3、把属于dao的代码拷贝到 该模块中：

 

4、完成后发布到本地仓库中

3.3 创建service子模块

1、创建方式如上：

2、把属于service的代码拷贝到该工程中

 

3、发布到本地仓库中

3.4 创建Action子模块

1、选择war的打包方式

 

5、 拷贝属于action的代码和配置文件

 

6、 修改web.xml  添加spring监听

<listener>
 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>	
	
<context-param>
 <param-name>contextConfigLocation</param-name>
 <param-value>classpath*:applicationContext-*.xml</param-value>
</context-param>

4、添加页面：

 

4 私服 nexus

安装nexus

 

启动服务

 

启动失败的解决方法：

 

 


登录nexus

用户名/密码  admin/admin123

仓库类型

 

Virtual   虚拟仓库

Proxy  代理仓库

Hosted  宿主仓库  本地仓库

Group 组

需求：

把dao放到私服上，然后service从私服上下载

需求 ：将ssh_dao的这个工程打成jar包，并放入到私服上去.

4.1 上传dao

第一步： 需要在客户端即部署dao工程的电脑上配置 maven环境，并修改 settings.xml 文件，配置连接私服的用户和密码 。

此用户名和密码用于私服校验，因为私服需要知道上传都 的账号和密码 是否和私服中的账号和密码 一致。

    <server>

      <id>releases</id>

      <username>admin</username>

      <password>admin123</password>

    </server>

<server>

      <id>snapshots</id>

      <username>admin</username>

      <password>admin123</password>

    </server>

第二步： 配置项目pom.xml

配置私服仓库的地址，本公司的自己的jar包会上传到私服的宿主仓库，根据工程的版本号决定上传到哪个宿主仓库，如果版本为release则上传到私服的release仓库，如果版本为snapshot则上传到私服的snapshot仓库

  <distributionManagement>
  	<repository>
  		<id>releases</id>
	<url>http://localhost:8081/nexus/content/repositories/releases/</url>
  	</repository> 
  	<snapshotRepository>
  		<id>snapshots</id>
	<url>http://localhost:8081/nexus/content/repositories/snapshots/</url>
  	</snapshotRepository> 
  </distributionManagement>

注意：pom.xml这里<id> 和 settings.xml 配置 <id> 对应！

第三步：执行deploy命令发布到私服

4.2 下载dao

第一步 修改settings.xml

<profile>   

<!--profile的id-->

    <id>dev</id>   

    <repositories>   

      <repository>  

<!--仓库id，repositories可以配置多个仓库，保证id不重复-->

        <id>nexus</id>   

<!--仓库地址，即nexus仓库组的地址-->

        <url>http://localhost:8081/nexus/content/groups/public/</url>   

<!--是否下载releases构件-->

        <releases>   

          <enabled>true</enabled>   

        </releases>   

<!--是否下载snapshots构件-->

        <snapshots>   

          <enabled>true</enabled>   

        </snapshots>   

      </repository>   

    </repositories>  

 <pluginRepositories>  

    	<!-- 插件仓库，maven的运行依赖插件，也需要从私服下载插件 -->

        <pluginRepository>  

        	<!-- 插件仓库的id不允许重复，如果重复后边配置会覆盖前边 -->

            <id>public</id>  

            <name>Public Repositories</name>  

            <url>http://localhost:8081/nexus/content/groups/public/</url>  

        </pluginRepository>  

    </pluginRepositories>  

  </profile>  


  <activeProfiles>

    <activeProfile>dev</activeProfile>

  </activeProfiles>

第二步 删除本地仓库中的dao

第三步 update service工程，出现以下信息说明已经成功

 

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