怎么安裝參見CentOS6.9安裝Nexus3.19 ，接下來就是如何配置。打開我們安裝后的nexus界面，用admin賬號登陸，點擊Server administration and configuration按鈕：
點擊Repository
我們可以看到nexus默認給我建好了一些倉庫，其中包括3類：代理proxy，倉庫組group和宿主host。
代理用來指向遠程倉庫的，如中央倉庫，但畢竟國內的阿里雲倉庫比國外要快許多，所以我們自己建一個新的代理倉庫。點擊Create Repository：
選擇maven2（proxy）：
輸入倉庫名和阿里雲的遠程倉庫地址（http://maven.aliyun.com/nexus/content/groups/public）：
拉到最下面點擊Create Repository，返回上一層界面： 
接着我們創建宿主倉庫，宿主倉庫跟我們的項目相關，用於上傳我們打出來的包，分發布Release和快照Snapshot兩種，所以我們就建兩個宿主倉庫，過程同上：
最后我們再創建一個倉庫組，倉庫組就像數據庫的視圖一樣，能把多個倉庫聚合起來用，記得把aliyun放在maven-central上面，這樣才能優先找阿里雲的構件：
ok，現在我要的倉庫都弄好了，接着配置maven的全局設置setting.xml文件。在這之前，還得新建一個用戶給開發用。nexus3.19的默認用戶有兩種：admin（能配置倉庫、查詢和上傳構件）和anonymous（只能查構件）：
我們新增一個角色deployment用於構建查詢和上傳，剝離admin的倉庫管理能力，免得開發人員瞎搞。先新增角色：
再回去用戶那里新增一個deployment用戶：
最后，我們在setting中添加我們新加的宿主倉庫的認證（我設置deployment用戶的密碼就是deployment123），配置鏡像，讓所有maven構建都走到鏡像，經由鏡像去請求倉庫組，最后請求到我們配置的宿主倉庫和代理倉庫，大概脈絡如下：
+---------------aliyun(proxy) ：下載開源jar包
maven -> nexus(group) -> |---------------nexus-releases(host) ：項目上傳release的jar包，下載本地上傳的jar包
+---------------nexus-snapshots(host)：項目上傳snapshot的jar包，下載本地上傳的jar包
新建一個setting文件setting_nexus.xml文件：
<?xml version="1.0" encoding="UTF-8"?> <settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd"> <localRepository>E:/Users/wulf/.m2/repository</localRepository> <mirrors> <mirror> <id>nexus</id> <name>nexus repository</name> <url>http://111.11.11.11/repository/nexus-group</url> <mirrorOf>*</mirrorOf> </mirror> </mirrors> <!-- 激活配置 --> <activeProfiles> <activeProfile>nexus</activeProfile> </activeProfiles> <profiles> <profile> <id>nexus</id> <repositories> <repository> <id>central</id> <url>http://111.11.11.11:17407/repository/aliyun</url> <releases><enabled>true</enabled></releases> <snapshots><enabled>true</enabled></snapshots> </repository> </repositories> <pluginRepositories> <pluginRepository> <id>central</id> <url>http://111.11.11.11:17407/repository/aliyun</url> <releases><enabled>true</enabled></releases> <snapshots><enabled>true</enabled></snapshots> </pluginRepository> </pluginRepositories> </profile> </profiles> <servers> <server> <id>nexus-releases</id> <username>deployment</username> <password>deployment123</password> </server> <server> <id>nexus-snapshots</id> <username>deployment</username> <password>deployment123</password> </server> </servers> </settings>
新建一個maven項目（spring boot項目），指定我們新增setting文件：
只需要往按默認生成的pom文件中加入上傳jar包的宿主倉庫即可：
<?xml version="1.0" encoding="UTF-8"?> <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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.4.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.wlf</groupId> <artifactId>spring-cloud-plugin</artifactId> <version>0.0.1-SNAPSHOT</version> <name>spring-cloud-plugin</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <distributionManagement> <repository> <id>nexus-releases</id> <url>http://111.11.11.11:17407/repository/nexus-releases/</url> </repository> <snapshotRepository> <id>nexus-snapshots</id> <url>http://111.11.11.11:17407/repository/nexus-snapshots/</url> </snapshotRepository> </distributionManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
跑一個deploy，看下maven執行日志：
Downloading: http://111.11.11.11:17407/repository/nexus-snapshots/com/wlf/spring-cloud-plugin/0.0.1-SNAPSHOT/maven-metadata.xml
Uploading: http://111.11.11.11:17407/repository/nexus-snapshots/com/wlf/spring-cloud-plugin/0.0.1-SNAPSHOT/spring-cloud-plugin-0.0.1-20201017.010507-1.jar
Uploaded: http://111.11.11.11:17407/repository/nexus-snapshots/com/wlf/spring-cloud-plugin/0.0.1-SNAPSHOT/spring-cloud-plugin-0.0.1-20201017.010507-1.jar (8033 KB at 1523.3 KB/sec)
Uploading: http://111.11.11.11:17407/repository/nexus-snapshots/com/wlf/spring-cloud-plugin/0.0.1-SNAPSHOT/spring-cloud-plugin-0.0.1-20201017.010507-1.pom
Uploaded: http://111.11.11.11:17407/repository/nexus-snapshots/com/wlf/spring-cloud-plugin/0.0.1-SNAPSHOT/spring-cloud-plugin-0.0.1-20201017.010507-1.pom (3 KB at 4.9 KB/sec)
Downloading: http://111.11.11.11:17407/repository/nexus-snapshots/com/wlf/spring-cloud-plugin/maven-metadata.xml
Uploading: http://111.11.11.11:17407/repository/nexus-snapshots/com/wlf/spring-cloud-plugin/0.0.1-SNAPSHOT/maven-metadata.xml
Uploaded: http://111.11.11.11:17407/repository/nexus-snapshots/com/wlf/spring-cloud-plugin/0.0.1-SNAPSHOT/maven-metadata.xml (776 B at 2.9 KB/sec)
Uploading: http://111.11.11.11:17407/repository/nexus-snapshots/com/wlf/spring-cloud-plugin/maven-metadata.xml
Uploaded: http://111.11.11.11:17407/repository/nexus-snapshots/com/wlf/spring-cloud-plugin/maven-metadata.xml (286 B at 1.4 KB/sec)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 27.136 s
[INFO] Finished at: 2020-10-17T09:05:13+08:00
[INFO] Final Memory: 25M/210M
[INFO] ------------------------------------------------------------------------
去看一眼nexus的界面，nexus-snapshots的包成功打上去了：
