【MAVEN】maven项目下载更新pom jar包速度慢 解决方案

1·下载安装 最新版本的maven 

https://maven.apache.org/download.cgi

2·速度慢的主要原因是因为默认setting.xml里配置的国外的 maven 数据源

切换为阿里的数据源

需要在修改setting.xml 在 <mirrors> 节点下 的原 数据源替换为

1.  
   <mirror>
2.  
   <id>alimaven</id>
3.  
   <name>aliyun maven</name>
4.  
   <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
5.  
   <mirrorOf>central</mirrorOf>
6.  
   </mirror>

完整setting.xml

1.  
   <?xml version="1.0" encoding="UTF-8"?>
2.  
    
3.  
   <!--
4.  
   Licensed to the Apache Software Foundation (ASF) under one
5.  
   or more contributor license agreements. See the NOTICE file
6.  
   distributed with this work for additional information
7.  
   regarding copyright ownership. The ASF licenses this file
8.  
   to you under the Apache License, Version 2.0 (the
9.  
   "License"); you may not use this file except in compliance
10.  
    with the License. You may obtain a copy of the License at
11.  
     
12.  
    http://www.apache.org/licenses/LICENSE-2.0
13.  
     
14.  
    Unless required by applicable law or agreed to in writing,
15.  
    software distributed under the License is distributed on an
16.  
    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17.  
    KIND, either express or implied. See the License for the
18.  
    specific language governing permissions and limitations
19.  
    under the License.
20.  
    -->
21.  
     
22.  
    <!--
23.  
    | This is the configuration file for Maven. It can be specified at two levels:
24.  
    |
25.  
    | 1. User Level. This settings.xml file provides configuration for a single user,
26.  
    | and is normally provided in ${user.home}/.m2/settings.xml.
27.  
    |
28.  
    | NOTE: This location can be overridden with the CLI option:
29.  
    |
30.  
    | -s /path/to/user/settings.xml
31.  
    |
32.  
    | 2. Global Level. This settings.xml file provides configuration for all Maven
33.  
    | users on a machine (assuming they‘re all using the same Maven
34.  
    | installation). It‘s normally provided in
35.  
    | ${maven.home}/conf/settings.xml.
36.  
    |
37.  
    | NOTE: This location can be overridden with the CLI option:
38.  
    |
39.  
    | -gs /path/to/global/settings.xml
40.  
    |
41.  
    | The sections in this sample file are intended to give you a running start at
42.  
    | getting the most out of your Maven installation. Where appropriate, the default
43.  
    | values (values used when the setting is not specified) are provided.
44.  
    |
45.  
    |-->
46.  
    <settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
47.  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
48.  
    xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
49.  
    <!-- localRepository
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    | The path to the local repository maven will use to store artifacts.
51.  
    |
52.  
    | Default: ${user.home}/.m2/repository
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    <localRepository>/path/to/local/repo</localRepository>
54.  
    -->
55.  
     
56.  
    <!-- interactiveMode
57.  
    | This will determine whether maven prompts you when it needs input. If set to false,
58.  
    | maven will use a sensible default value, perhaps based on some other setting, for
59.  
    | the parameter in question.
60.  
    |
61.  
    | Default: true
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    <interactiveMode>true</interactiveMode>
63.  
    -->
64.  
     
65.  
    <!-- offline
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    | Determines whether maven should attempt to connect to the network when executing a build.
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    | This will have an effect on artifact downloads, artifact deployment, and others.
68.  
    |
69.  
    | Default: false
70.  
    <offline>false</offline>
71.  
    -->
72.  
     
73.  
    <!-- pluginGroups
74.  
    | This is a list of additional group identifiers that will be searched when resolving plugins by their prefix, i.e.
75.  
    | when invoking a command line like "mvn prefix:goal". Maven will automatically add the group identifiers
76.  
    | "org.apache.maven.plugins" and "org.codehaus.mojo" if these are not already contained in the list.
77.  
    |-->
78.  
    <pluginGroups>
79.  
    <!-- pluginGroup
80.  
    | Specifies a further group identifier to use for plugin lookup.
81.  
    <pluginGroup>com.your.plugins</pluginGroup>
82.  
    -->
83.  
    </pluginGroups>
84.  
     
85.  
    <!-- proxies
86.  
    | This is a list of proxies which can be used on this machine to connect to the network.
87.  
    | Unless otherwise specified (by system property or command-line switch), the first proxy
88.  
    | specification in this list marked as active will be used.
89.  
    |-->
90.  
    <proxies>
91.  
    <!-- proxy
92.  
    | Specification for one proxy, to be used in connecting to the network.
93.  
    |
94.  
    <proxy>
95.  
    <id>optional</id>
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    <active>true</active>
97.  
    <protocol>http</protocol>
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    <username>proxyuser</username>
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    <password>proxypass</password>
100.  
     <host>proxy.host.net</host>
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     <port>80</port>
102.  
     <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
103.  
     </proxy>
104.  
     -->
105.  
     </proxies>
106.  
      
107.  
     <!-- servers
108.  
     | This is a list of authentication profiles, keyed by the server-id used within the system.
109.  
     | Authentication profiles can be used whenever maven must make a connection to a remote server.
110.  
     |-->
111.  
     <servers>
112.  
     <!-- server
113.  
     | Specifies the authentication information to use when connecting to a particular server, identified by
114.  
     | a unique name within the system (referred to by the ‘id‘ attribute below).
115.  
     |
116.  
     | NOTE: You should either specify username/password OR privateKey/passphrase, since these pairings are
117.  
     | used together.
118.  
     |
119.  
     <server>
120.  
     <id>deploymentRepo</id>
121.  
     <username>repouser</username>
122.  
     <password>repopwd</password>
123.  
     </server>
124.  
     -->
125.  
      
126.  
     <!-- Another sample, using keys to authenticate.
127.  
     <server>
128.  
     <id>siteServer</id>
129.  
     <privateKey>/path/to/private/key</privateKey>
130.  
     <passphrase>optional; leave empty if not used.</passphrase>
131.  
     </server>
132.  
     -->
133.  
     </servers>
134.  
      
135.  
     <!-- mirrors
136.  
     | This is a list of mirrors to be used in downloading artifacts from remote repositories.
137.  
     |
138.  
     | It works like this: a POM may declare a repository to use in resolving certain artifacts.
139.  
     | However, this repository may have problems with heavy traffic at times, so people have mirrored
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     | it to several places.
141.  
     |
142.  
     | That repository definition will have a unique id, so we can create a mirror reference for that
143.  
     | repository, to be used as an alternate download site. The mirror site will be the preferred
144.  
     | server for that repository.
145.  
     |-->
146.  
     <mirrors>
147.  
     <!-- mirror
148.  
     | Specifies a repository mirror site to use instead of a given repository. The repository that
149.  
     | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
150.  
     | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
151.  
     |
152.  
     <mirror>
153.  
     <id>mirrorId</id>
154.  
     <mirrorOf>repositoryId</mirrorOf>
155.  
     <name>Human Readable Name for this Mirror.</name>
156.  
     <url>http://my.repository.com/repo/path</url>
157.  
     </mirror>
158.  
     -->
159.  
     <mirror>
160.  
     <id>alimaven</id>
161.  
     <name>aliyun maven</name>
162.  
     <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
163.  
     <mirrorOf>central</mirrorOf>
164.  
     </mirror>
165.  
     </mirrors>
166.  
      
167.  
     <!-- profiles
168.  
     | This is a list of profiles which can be activated in a variety of ways, and which can modify
169.  
     | the build process. Profiles provided in the settings.xml are intended to provide local machine-
170.  
     | specific paths and repository locations which allow the build to work in the local environment.
171.  
     |
172.  
     | For example, if you have an integration testing plugin - like cactus - that needs to know where
173.  
     | your Tomcat instance is installed, you can provide a variable here such that the variable is
174.  
     | dereferenced during the build process to configure the cactus plugin.
175.  
     |
176.  
     | As noted above, profiles can be activated in a variety of ways. One way - the activeProfiles
177.  
     | section of this document (settings.xml) - will be discussed later. Another way essentially
178.  
     | relies on the detection of a system property, either matching a particular value for the property,
179.  
     | or merely testing its existence. Profiles can also be activated by JDK version prefix, where a
180.  
     | value of ‘1.4‘ might activate a profile when the build is executed on a JDK version of ‘1.4.2_07‘.
181.  
     | Finally, the list of active profiles can be specified directly from the command line.
182.  
     |
183.  
     | NOTE: For profiles defined in the settings.xml, you are restricted to specifying only artifact
184.  
     | repositories, plugin repositories, and free-form properties to be used as configuration
185.  
     | variables for plugins in the POM.
186.  
     |
187.  
     |-->
188.  
     <profiles>
189.  
     <!-- profile
190.  
     | Specifies a set of introductions to the build process, to be activated using one or more of the
191.  
     | mechanisms described above. For inheritance purposes, and to activate profiles via <activatedProfiles/>
192.  
     | or the command line, profiles have to have an ID that is unique.
193.  
     |
194.  
     | An encouraged best practice for profile identification is to use a consistent naming convention
195.  
     | for profiles, such as ‘env-dev‘, ‘env-test‘, ‘env-production‘, ‘user-jdcasey‘, ‘user-brett‘, etc.
196.  
     | This will make it more intuitive to understand what the set of introduced profiles is attempting
197.  
     | to accomplish, particularly when you only have a list of profile id‘s for debug.
198.  
     |
199.  
     | This profile example uses the JDK version to trigger activation, and provides a JDK-specific repo.
200.  
     <profile>
201.  
     <id>jdk-1.4</id>
202.  
      
203.  
     <activation>
204.  
     <jdk>1.4</jdk>
205.  
     </activation>
206.  
      
207.  
     <repositories>
208.  
     <repository>
209.  
     <id>jdk14</id>
210.  
     <name>Repository for JDK 1.4 builds</name>
211.  
     <url>http://www.myhost.com/maven/jdk14</url>
212.  
     <layout>default</layout>
213.  
     <snapshotPolicy>always</snapshotPolicy>
214.  
     </repository>
215.  
     </repositories>
216.  
     </profile>
217.  
     -->
218.  
      
219.  
     <!--
220.  
     | Here is another profile, activated by the system property ‘target-env‘ with a value of ‘dev‘,
221.  
     | which provides a specific path to the Tomcat instance. To use this, your plugin configuration
222.  
     | might hypothetically look like:
223.  
     |
224.  
     | ...
225.  
     | <plugin>
226.  
     | <groupId>org.myco.myplugins</groupId>
227.  
     | <artifactId>myplugin</artifactId>
228.  
     |
229.  
     | <configuration>
230.  
     | <tomcatLocation>${tomcatPath}</tomcatLocation>
231.  
     | </configuration>
232.  
     | </plugin>
233.  
     | ...
234.  
     |
235.  
     | NOTE: If you just wanted to inject this configuration whenever someone set ‘target-env‘ to
236.  
     | anything, you could just leave off the <value/> inside the activation-property.
237.  
     |
238.  
     <profile>
239.  
     <id>env-dev</id>
240.  
      
241.  
     <activation>
242.  
     <property>
243.  
     <name>target-env</name>
244.  
     <value>dev</value>
245.  
     </property>
246.  
     </activation>
247.  
      
248.  
     <properties>
249.  
     <tomcatPath>/path/to/tomcat/instance</tomcatPath>
250.  
     </properties>
251.  
     </profile>
252.  
     -->
253.  
     </profiles>
254.  
      
255.  
     <!-- activeProfiles
256.  
     | List of profiles that are active for all builds.
257.  
     |
258.  
     <activeProfiles>
259.  
     <activeProfile>alwaysActiveProfile</activeProfile>
260.  
     <activeProfile>anotherAlwaysActiveProfile</activeProfile>
261.  
     </activeProfiles>
262.  
     -->
263.  
     </settings>

3·idea 设置阿里maven数据源方法

在如上图 处 设置为 我们 切换数据源的 setting.xml 即可

4·非idea方式 修复 maven config文件夹下的setting.xml

【MAVEN】maven项目下载更新pom jar包速度慢 解决方案

原文：https://www.cnblogs.com/roak/p/14191250.html