一、工具使用杂记

1、使用maven 创建新springboot项目时，因为https://start.spring.io/ 连接不上项目无法创建。直接把脚手架地址换为国内的

http://start.aliyun.com

2、maven 依赖包下载过慢

问题原因：Maven下载依赖包需要请求到国外镜像仓库，响应比较慢，遂会造成等待时间久、相应报错的问题。

在当前maven的配置文件 settings.xml中，mirrors使用以下内容

<mirrors>
 
<!--    <mirror>-->
<!--      <id>mirrorId</id>-->
<!--      <mirrorOf>repositoryId</mirrorOf>-->
<!--      <name>Human Readable Name for this Mirror.</name>-->
<!--      <url>http://my.repository.com/repo/path</url>-->
<!--    </mirror>-->
 
    <mirror>
        <id>alimaven</id>
        <name>aliyun maven</name>
        <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
 
    <mirror>
        <id>uk</id>
        <mirrorOf>central</mirrorOf>
        <name>Human Readable Name for this Mirror.</name>
        <url>http://uk.maven.org/maven2/</url>
    </mirror>
 
    <mirror>
        <id>CN</id>
        <name>OSChina Central</name>
        <url>http://maven.oschina.net/content/groups/public/</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
 
    <mirror>
        <id>nexus</id>
        <name>internal nexus repository</name>
        <url>http://repo.maven.apache.org/maven2</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
 
    <!-- junit镜像地址 -->
    <mirror>
        <id>junit</id>
        <name>junit Address/</name>
        <url>http://jcenter.bintray.com/</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
 
<!--    <mirrors>-->
        <!-- mirror
         | Specifies a repository mirror site to use instead of a given repository. The repository that
         | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
         | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
         |
        <mirror>
          <id>mirrorId</id>
          <mirrorOf>repositoryId</mirrorOf>
          <name>Human Readable Name for this Mirror.</name>
          <url>http://my.repository.com/repo/path</url>
        </mirror>
         -->
 
        <mirror>
            <!--This sends everything else to /public -->
            <id>nexus-aliyun</id>
            <mirrorOf>*</mirrorOf>
            <name>Nexus aliyun</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
        </mirror>
 
        <mirror>
            <id>osc</id>
            <mirrorOf>*</mirrorOf>
            <url>http://maven.oschina.net/content/groups/public/</url>
        </mirror>
 
        <mirror>
            <id>repo2</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://repo2.maven.org/maven2/</url>
        </mirror>
 
        <mirror>
            <id>net-cn</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://maven.net.cn/content/groups/public/</url>
        </mirror>
 
        <mirror>
            <id>ui</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://uk.maven.org/maven2/</url>
        </mirror>
 
        <mirror>
            <id>ibiblio</id>
            <mirrorOf>central</mirrorOf>
            <name>Human Readable Name for this Mirror.</name>
            <url>http://mirrors.ibiblio.org/pub/mirrors/maven2/</url>
        </mirror>
 
        <mirror>
            <id>jboss-public-repository-group</id>
            <mirrorOf>central</mirrorOf>
            <name>JBoss Public Repository Group</name>
            <url>http://repository.jboss.org/nexus/content/groups/public</url>
        </mirror>
 
        <mirror>
            <id>JBossJBPM</id>
            <mirrorOf>central</mirrorOf>
            <name>JBossJBPM Repository</name>
            <url>https://repository.jboss.org/nexus/content/repositories/releases/</url>
        </mirror>
 
    </mirrors>

 maven的jar包默认是在C盘，可以更改settings.xml的本地仓库：

<settings xmlns="http://maven.apache.org/SETTINGS/1.2.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.2.0 https://maven.apache.org/xsd/settings-1.2.0.xsd">
  <!-- localRepository
   | The path to the local repository maven will use to store artifacts.
   |
   | Default: ${user.home}/.m2/repository
  <localRepository>/path/to/local/repo</localRepository>
  -->
#把这个指向非C盘的位置
<localRepository>E:\softInstall\java\maven\repository</localRepository>

3、IDEA，设置所有新项目都使用指定maven配置

File -> New Projects Settings ->Settings for New Projects

3.1 搜索“maven”

Maven home path：本机中Maven的安装目录
User settings file：Maven安装目录下的配置文件