下载安装
最新nexus下载地址：http://www.sonatype.org/nexus/go
解压后会在同级目录中，出现两个文件夹：nexus-oss-webapp-1.8.0和sonatype-work，前者包含了nexus的运行环境和应用程序，后者包含了你自己的配置和数据。
$ mkdir nexus
$ tar xzvf /home/jili/nexus-2.7.0-05-bundle.tar.gz
$ ls
nexus-2.7.0-05 sonatype-work
启动nexus
$ cd bin/
$ ls
jsw nexus nexus.bat
$ ./nexus
Usage: ./nexus { console | start | stop | restart | status | dump }
$ ./nexus start
Starting Nexus OSS...
Started Nexus OSS.
查看控制台：
$ ./nexus console
显示未启动成功，报错如下：
$ ./nexus console Running Nexus OSS... wrapper | --> Wrapper Started as Console wrapper | Launching a JVM... wrapper | JVM exited while loading the application. jvm 1 | Exception in thread "main" java.lang.UnsupportedClassVersionError: org/sonatype/nexus/bootstrap/jsw/JswLauncher : Unsupported major.minor version 51.0 jvm 1 | at java.lang.ClassLoader.defineClass1(Native Method) jvm 1 | at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632) jvm 1 | at java.lang.ClassLoader.defineClass(ClassLoader.java:616) jvm 1 | at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) jvm 1 | at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) jvm 1 | at java.net.URLClassLoader.access$000(URLClassLoader.java:58) jvm 1 | at java.net.URLClassLoader$1.run(URLClassLoader.java:197) jvm 1 | at java.security.AccessController.doPrivileged(Native Method) jvm 1 | at java.net.URLClassLoader.findClass(URLClassLoader.java:190) jvm 1 | at java.lang.ClassLoader.loadClass(ClassLoader.java:307) jvm 1 | at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) jvm 1 | at java.lang.ClassLoader.loadClass(ClassLoader.java:248) jvm 1 | Could not find the main class: org.sonatype.nexus.bootstrap.jsw.JswLauncher. Program will exit. wrapper | Reloading Wrapper configuration... wrapper | Launching a JVM... wrapper | JVM exited while loading the application. . . . jvm 5 | Exception in thread "main" java.lang.UnsupportedClassVersionError: org/sonatype/nexus/bootstrap/jsw/JswLauncher : Unsupported major.minor version 51.0 jvm 5 | at java.lang.ClassLoader.defineClass1(Native Method) jvm 5 | at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632) jvm 5 | at java.lang.ClassLoader.defineClass(ClassLoader.java:616) jvm 5 | at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) jvm 5 | at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) jvm 5 | at java.net.URLClassLoader.access$000(URLClassLoader.java:58) jvm 5 | at java.net.URLClassLoader$1.run(URLClassLoader.java:197) jvm 5 | at java.security.AccessController.doPrivileged(Native Method) jvm 5 | at java.net.URLClassLoader.findClass(URLClassLoader.java:190) jvm 5 | at java.lang.ClassLoader.loadClass(ClassLoader.java:307) jvm 5 | at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) jvm 5 | at java.lang.ClassLoader.loadClass(ClassLoader.java:248) jvm 5 | Could not find the main class: org.sonatype.nexus.bootstrap.jsw.JswLauncher. Program will exit. wrapper | There were 5 failed launches in a row, each lasting less than 300 seconds. Giving up. wrapper | There may be a configuration problem: please check the logs. wrapper | <-- Wrapper Stopped
原因：查找原因是JDK版本过低造成的，升级到最新的JDK7或者使用nexus-2.4-bundle.tar.gz版本JDK6会支持.
Nexus所有版本下载地址：http://www.sonatype.org/nexus/archived
下载Nexus2.4重来
$ ls
nexus-2.4.0-09 sonatype-work
$ cd nexus-2.4.0-09/bin/
$ ls
jsw nexus nexus.bat
$ ./nexus
Usage: ./nexus { console | start | stop | restart | status | dump }
$ ./nexus start
Starting Nexus OSS...
Started Nexus OSS.
$ ./nexus console
Running Nexus OSS...
Nexus OSS is already running.
控制台显示启动成功。
查看nexus日志：
$ cd nexus-2.4.0-09/logs
$ ls
wrapper.log
$ tail -f wrapper.log
配置nexus
访问网址：http://yourhostname:8081/nexus
右上角以admin登陆，默认用户名/密码：admin/admin123。
3rd party、Snapshots、Releases这三个，分别用来保存第三方jar、项目组内部的快照、项目组内部的发布版.
手动添加第三方jar
将第三方的jar上传到nexus上面：
点击Upload Artifact(s)按钮提交后即上传。
查看上传的jar包如下：
在项目中使用私服的jar包配置pom.xml如下：
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.vclk.mkt.crawler</groupId> <artifactId>MarketingCrawler</artifactId> <packaging>jar</packaging> <version>0.3</version> <name>MarketingCrawler</name> <url>http://maven.apache.org</url> <!-- 仓库地址 --> <repositories> <repository> <id>nexus</id> <name>Team Nexus Repository</name> <url>http://yourhostname:8081/nexus/content/groups/public</url> </repository> </repositories> <!-- 插件地址 --> <pluginRepositories> <pluginRepository> <id>nexus</id> <name>Team Nexus Repository</name> <url>http://yourhostname:8081/nexus/content/groups/public</url> </pluginRepository> </pluginRepositories> <!-- jar --> <dependencies> <dependency> <groupId>de.innosystec</groupId> <artifactId>java-unrar</artifactId> <version>0.5</version> </dependency> </dependencies> </project>
Maven在项目根目录下执行mvn eclipse:eclipse命令时，所依赖的jar包都会从私服中下载到本地并关联上项目，私服中没有就会从网络上下载到私服，本地再从私服下载。
自动发布构件到远程仓库
在工程的pom.xml中添加：
<distributionManagement> <repository> <id>nexus-releases</id> <url>http://yourhostname:8081/nexus/content/repositories/releases/</url> </repository> <snapshotRepository> <id>nexus-snapshots</id> <url>http://yourhostname:8081/nexus/content/repositories/snapshots/</url> </snapshotRepository> </distributionManagement>
进入maven的安装目录apache-maven-3.1.1\conf目录下，向settings.xml配置文件中的语句块中添加如下所示：
<servers> <server> <id>nexus-releases</id> <username>admin</username> <password>admin123</password> </server> <server> <id>nexus-snapshots</id> <username>admin</username> <password>admin123</password> </server> </servers> 进入windows命令行，在工程所在目录下执行 mvn deploy 所部署的包就自动上传到了nexus安装目录下的/maven/nexus/sonatype-work/nexus/storage/releases/com/vclk/mkt/crawler/MarketingCrawler/0.3目录
nexus仓库中各目录介绍
项目中的各种jar包和项目快照等都放在/nexus/sonatype-work/nexus/storage/目录下，在这个目录下包括以下各种目录和存放相应文件。
/nexus/sonatype-work/nexus/storage/central - 用于放置maven从中央仓库中下载下来的项目pom.xml中配置到的相关jar包；
/nexus/sonatype-work/nexus/storage/thirdparty - 用于放置自己手动上传的第三方jar包；
/nexus/sonatype-work/nexus/storage/releases - 用于放置项目deploy后的发布版。
