Maven、Nexus学习2

一、前提

1.1 创建了4个Maven工程,add,sub工程中分别有一个类实现了加减法，mix则去调用其他三个工程的方法，来实现计算。

add-AddClass
Sub-Substract
mix-Mix

1.2 AddClass:

package add;
public classAddClass {
    public int add(int x,int y){
        return(x+y);
    }
}

Add：pom.xml

<project 
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.a</groupId>
   <artifactId>add</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <name>Add</name>
   <description>加法</description>
</project>

1.3 Substract:

package sub;
public classSubstract {
  public int subStrace(intx,inty){
    return (x-y);
   }
}

Sub:pom.xml

<project 
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.a</groupId>
   <artifactId>sub</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <name>Sub</name>
</project>

1.4 Mix：

package mix;
import sub.Substract;
public classMix {
 //Substractsub=new Substract();
 //Multiply mix=new Multiply();
  public int mix(int x,int y ,int z){
    return x-y*z;
   }
}

Mix：pom.xml

<project 
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.a</groupId>
   <artifactId>mix</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <name>Mix</name>
</project>

1.5 nexus私服搭建

将下载的nexus bundle包解压到本地磁盘下面，然后进入路径：

psb.png

1.6 eclipse中设置maven的setting.xml

搭建好nexus私服后，需要在setting.xml设置远程仓库地址
Setting.xml内容如下：

<?xml version="1.0"encoding="UTF-8"?>
<settings>
   <mirrors>
      <mirror>
         <id>nexus</id>
         <mirrorOf>central</mirrorOf>
         <url>http://127.0.0.1:8081/nexus/content/groups/public</url>;
      </mirror>
   </mirrors>
   <profiles>
      <profile>
         <id>dev</id>
         <repositories>
            <repository>
                <id>releases</id>
                <url>http://127.0.0.1:8081/nexus/content/repositories/releases
               </url>
                <releases>
                   <enabled>true</enabled>
                </releases>
                <snapshots>
                   <enabled>true</enabled>
                </snapshots>
            </repository>
            <repository>
                <id>snapshots</id>
                <url>http://127.0.0.1:8081/nexus/content/repositories/snapshots
                </url>
                <releases>
                   <enabled>true</enabled>
                </releases>
                <snapshots>
                   <enabled>true</enabled>
                </snapshots>
            </repository>
            <repository>
                <id>thirdparty</id>
                <url>http://127.0.0.1:8081/nexus/content/repositories/thirdparty
                </url>
                <releases>
                   <enabled>true</enabled>
                </releases>
                <snapshots>
                   <enabled>true</enabled>
                </snapshots>
            </repository>
            <repository>
                <id>public</id>
                <url>http://127.0.0.1:8081/nexus/content/group/public
                </url>
                <releases>
                   <enabled>true</enabled>
                </releases>
                <snapshots>
                   <enabled>true</enabled>
                </snapshots>
            </repository>
         </repositories>
      </profile>
   </profiles>
   <activeProfiles>
      <activeProfile>dev</activeProfile>
   </activeProfiles>

 
   <!--<distributionManagement>
      <repository>
         <id>releases</id>
         <name>NexusRelease Repository</name>
         <url>http://127.0.0.1:8081/nexus/content/repositories/releases/
         </url>
      </repository>
      <snapshotRepository>
         <id>snapshots</id>
         <name>NexusSnapshot Repository</name>
         <url>http://127.0.0.1:8081/nexus/content/repositories/snapshots/
         </url>
      </snapshotRepository>
   </distributionManagement>
   -->
   
   <servers>
      <server>
         <id>snapshots</id>
         <username>admin</username>
         <password>admin123</password>
      </server>

      <server>
         <id>releases</id>
         <username>admin</username>
         <password>admin123</password>
      </server>

   </servers>
   <localRepository>D:\maven\mvnRespo</localRepository>
</settings>

二、实验

2.1 maven install操作

选择sub项目右键run as->maven install，查看控制台，当成功执行后看到结果:
Maven install会将sub项目打包，然后把jar包和pom.xml安装到本地仓库路径下面

psb[2].png

2.2 maven deploy

我想执行maven deploy，把项目jar包或者war包上传到私服，让大家共享，所以我选择sub项目右键run as -> runconfigurations->maven build 右键new ，创建如下图所示sub，填写图中标红的地方。

然后点击run，查看控制台，发现报错，查找后发现我pom.xml中没有上传到私服的配置

psb[1].png

修改sub 的pom.xml如下，其中distributionManagement即为添加的配置，然后在重新run就发现已经deploy到私服了，并且会重新install到本地仓库：

<project 
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.a</groupId>
   <artifactId>sub</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <name>Sub</name>
   <distributionManagement>
      <repository>
         <id>releases</id>
         <name>Nexus Release Repository</name>
         <url>http://127.0.0.1:8081/nexus/content/repositories/releases/</url>
      </repository>
      <snapshotRepository>
         <id>snapshots</id>
         <name>Nexus Snapshot Repository</name>
         <url>http://127.0.0.1:8081/nexus/content/repositories/snapshots/</url>
      </snapshotRepository>
   </distributionManagement>
</project>

2.3在mix中访问工程sub方法

首先修改工程mix的类Mix如下，发现无法识别Substract,

只需要很简单一步就可以在mix工程中引用sub工程中方法了

修改mix的pom.xml文件如下即可：

<project 
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.a</groupId>
   <artifactId>mix</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <name>Mix</name>
   <dependencies>
   <dependency>
   <groupId>com.a</groupId>
   <artifactId>sub</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   </dependency>
   </dependencies>
</project>