1. 下载Maven

官方地址：http://maven.apache.org/download.cgi

解压并新建一个本地仓库文件夹

2.配置本地仓库路径


3.配置maven环境变量





4.在IntelliJ IDEA中配置maven

打开-File-Settings

5.新建maven WEB项目

打开-File-New-Project

点击NEXT


点击NEXT


添加的配置为 archetypeCatalog=internal

点击NEXT


点击NEXT


点击Finish后项目开始创建

点击右下角查看进去

6.maven web模板项目结构




同样在main下新建test测试文件夹,再在此文件夹下新建java测试源码文件夹和resource测试资源文件夹


也可以右键项目-选择Open Module Settings打开项目配置页面更改

7.配置依赖jar包

jar包配置搜索

官方地址：http://mvnrepository.com/
其它推荐
Vue表单设计器

一、安装本地Maven

tips: 官网为外网，下载速度较慢，这里提供3.6.3版本的三方链接下载Maven下载



无视下载速度以及需要其他版本的伙伴点此进入Maven官网下载


选择左侧Download




点击箭头所指的链接进行下载




下载完成后，选择一个路径进行解压


然后配置path环境变量,如图



系统变量:MAVEN_HOME = F:\dev\apache-maven-3.6.1
系统变量:path = %MAVEN_HOME%\bin

MAVEN_HOME:




path:



然后win+R 运行cmd 输入 mvn -version，如图所示则配置成功


二、配置settings文件


在F:\dev\apache-maven-3.6.1\conf下可以找到settings文件，打开(嫌麻烦的直接看最后一步)


找到第52行，这里是maven默认的仓库




我们复制第53行


<localRepository>/path/to/local/repo</localRepository>

将它拿到注释外并将中间的内容改成你需要的路径，如图
<localRepository>F:/repository</localRepository>

这里的路径随便设置，注意这里是正斜杠



因为国外的服务器下载jar包很慢所以我们改为阿里云服务器（大约在150行左右），这两个仓库只用选一个(根据大家反馈建议使用第一个，第二个在有的版本可能会出现warning)

 <!-- 阿里云仓库 -->
        <mirror>
            <id>alimaven</id>
            <mirrorOf>central</mirrorOf>
            <name>aliyun maven</name>
            <url>http://maven.aliyun.com/nexus/content/repositories/central/</url>
        </mirror>
     或者
      <mirror>
		<id>nexus-aliyun</id>
		<mirrorOf>*</mirrorOf>
        <name>Nexus aliyun</name>
        <url>http://maven.aliyun.com/nexus/content/groups/public</url>
	 </mirror>




如图，要夹在两个mirrors标签之间




在最后配置jdk，也要夹在两个profiles标签之间(我这里使用的为jdk8)


<!-- java版本 --> 
<profile>
      <id>jdk-1.8</id>
      <activation>
	    <activeByDefault>true</activeByDefault>
        <jdk>1.8</jdk>
      </activation>

      <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
		<maven.compiler.target>1.8</maven.compiler.target>
		<maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
      </properties>
</profile>





配置完成，在命令行输入mvn help:system测试，看到下载链接里面是ailiyun的链接表示配置成功


嫌麻烦的直接复制配置文件的内容即可,不过路径还是要改(参考第3步)


<?xml version="1.0" encoding="UTF-8"?>

<!--
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
-->

<!--
 | This is the configuration file for Maven. It can be specified at two levels:
 |
 |  1. User Level. This settings.xml file provides configuration for a single user,
 |                 and is normally provided in ${user.home}/.m2/settings.xml.
 |
 |                 NOTE: This location can be overridden with the CLI option:
 |
 |                 -s /path/to/user/settings.xml
 |
 |  2. Global Level. This settings.xml file provides configuration for all Maven
 |                 users on a machine (assuming they're all using the same Maven
 |                 installation). It's normally provided in
 |                 ${maven.conf}/settings.xml.
 |
 |                 NOTE: This location can be overridden with the CLI option:
 |
 |                 -gs /path/to/global/settings.xml
 |
 | The sections in this sample file are intended to give you a running start at
 | getting the most out of your Maven installation. Where appropriate, the default
 | values (values used when the setting is not specified) are provided.
 |
 |-->
<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
   | The path to the local repository maven will use to store artifacts.
   |
   | Default: ${user.home}/.m2/repository
  <localRepository>/path/to/local/repo</localRepository>
  -->
<localRepository>F:/repository</localRepository>
  <!-- interactiveMode
   | This will determine whether maven prompts you when it needs input. If set to false,
   | maven will use a sensible default value, perhaps based on some other setting, for
   | the parameter in question.
   |
   | Default: true
  <interactiveMode>true</interactiveMode>
  -->

  <!-- offline
   | Determines whether maven should attempt to connect to the network when executing a build.
   | This will have an effect on artifact downloads, artifact deployment, and others.
   |
   | Default: false
  <offline>false</offline>
  -->

  <!-- pluginGroups
   | This is a list of additional group identifiers that will be searched when resolving plugins by their prefix, i.e.
   | when invoking a command line like "mvn prefix:goal". Maven will automatically add the group identifiers
   | "org.apache.maven.plugins" and "org.codehaus.mojo" if these are not already contained in the list.
   |-->
  <pluginGroups>
    <!-- pluginGroup
     | Specifies a further group identifier to use for plugin lookup.
    <pluginGroup>com.your.plugins</pluginGroup>
    -->
  </pluginGroups>

  <!-- proxies
   | This is a list of proxies which can be used on this machine to connect to the network.
   | Unless otherwise specified (by system property or command-line switch), the first proxy
   | specification in this list marked as active will be used.
   |-->
  <proxies>
    <!-- proxy
     | Specification for one proxy, to be used in connecting to the network.
     |
    <proxy>
      <id>optional</id>
      <active>true</active>
      <protocol>http</protocol>
      <username>proxyuser</username>
      <password>proxypass</password>
      <host>proxy.host.net</host>
      <port>80</port>
      <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
    </proxy>
    -->
  </proxies>

  <!-- servers
   | This is a list of authentication profiles, keyed by the server-id used within the system.
   | Authentication profiles can be used whenever maven must make a connection to a remote server.
   |-->
  <servers>
    <!-- server
     | Specifies the authentication information to use when connecting to a particular server, identified by
     | a unique name within the system (referred to by the 'id' attribute below).
     |
     | NOTE: You should either specify username/password OR privateKey/passphrase, since these pairings are
     |       used together.
     |
    <server>
      <id>deploymentRepo</id>
      <username>repouser</username>
      <password>repopwd</password>
    </server>
    -->

    <!-- Another sample, using keys to authenticate.
    <server>
      <id>siteServer</id>
      <privateKey>/path/to/private/key</privateKey>
      <passphrase>optional; leave empty if not used.</passphrase>
    </server>
    -->
  </servers>

  <!-- mirrors
   | This is a list of mirrors to be used in downloading artifacts from remote repositories.
   |
   | It works like this: a POM may declare a repository to use in resolving certain artifacts.
   | However, this repository may have problems with heavy traffic at times, so people have mirrored
   | it to several places.
   |
   | That repository definition will have a unique id, so we can create a mirror reference for that
   | repository, to be used as an alternate download site. The mirror site will be the preferred
   | server for that repository.
   |-->
  
    <!-- mirror
	<mirrors>
     | 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>
	 </mirrors>
     -->
     <!-- 阿里云仓库 -->
 <mirrors>
	 <mirror>
			<id>nexus-aliyun</id>
			<mirrorOf>*</mirrorOf>
			<name>Nexus aliyun</name>
			<url>http://maven.aliyun.com/nexus/content/groups/public</url>
	</mirror>
</mirrors>
  <!-- profiles
   | This is a list of profiles which can be activated in a variety of ways, and which can modify
   | the build process. Profiles provided in the settings.xml are intended to provide local machine-
   | specific paths and repository locations which allow the build to work in the local environment.
   |
   | For example, if you have an integration testing plugin - like cactus - that needs to know where
   | your Tomcat instance is installed, you can provide a variable here such that the variable is
   | dereferenced during the build process to configure the cactus plugin.
   |
   | As noted above, profiles can be activated in a variety of ways. One way - the activeProfiles
   | section of this document (settings.xml) - will be discussed later. Another way essentially
   | relies on the detection of a system property, either matching a particular value for the property,
   | or merely testing its existence. Profiles can also be activated by JDK version prefix, where a
   | value of '1.4' might activate a profile when the build is executed on a JDK version of '1.4.2_07'.
   | Finally, the list of active profiles can be specified directly from the command line.
   |
   | NOTE: For profiles defined in the settings.xml, you are restricted to specifying only artifact
   |       repositories, plugin repositories, and free-form properties to be used as configuration
   |       variables for plugins in the POM.
   |
   |-->
    <!-- profile
	<profiles>
     | Specifies a set of introductions to the build process, to be activated using one or more of the
     | mechanisms described above. For inheritance purposes, and to activate profiles via <activatedProfiles/>
     | or the command line, profiles have to have an ID that is unique.
     |
     | An encouraged best practice for profile identification is to use a consistent naming convention
     | for profiles, such as 'env-dev', 'env-test', 'env-production', 'user-jdcasey', 'user-brett', etc.
     | This will make it more intuitive to understand what the set of introduced profiles is attempting
     | to accomplish, particularly when you only have a list of profile id's for debug.
     |
     | This profile example uses the JDK version to trigger activation, and provides a JDK-specific repo.
    <profile>
      <id>jdk-1.4</id>

      <activation>
        <jdk>1.4</jdk>
      </activation>

      <repositories>
        <repository>
          <id>jdk14</id>
          <name>Repository for JDK 1.4 builds</name>
          <url>http://www.myhost.com/maven/jdk14</url>
          <layout>default</layout>
          <snapshotPolicy>always</snapshotPolicy>
        </repository>
      </repositories>
    </profile>
    -->

    <!--
     | Here is another profile, activated by the system property 'target-env' with a value of 'dev',
     | which provides a specific path to the Tomcat instance. To use this, your plugin configuration
     | might hypothetically look like:
     |
     | ...
     | <plugin>
     |   <groupId>org.myco.myplugins</groupId>
     |   <artifactId>myplugin</artifactId>
     |
     |   <configuration>
     |     <tomcatLocation>${tomcatPath}</tomcatLocation>
     |   </configuration>
     | </plugin>
     | ...
     |
     | NOTE: If you just wanted to inject this configuration whenever someone set 'target-env' to
     |       anything, you could just leave off the <value/> inside the activation-property.
     |
    <profile>
      <id>env-dev</id>

      <activation>
        <property>
          <name>target-env</name>
          <value>dev</value>
        </property>
      </activation>

      <properties>
        <tomcatPath>/path/to/tomcat/instance</tomcatPath>
      </properties>
    </profile>
	  
    -->
<profiles>
<profile>
      <id>jdk-1.8</id>
      <activation>
	    <activeByDefault>true</activeByDefault>
        <jdk>1.8</jdk>
      </activation>

      <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
		<maven.compiler.target>1.8</maven.compiler.target>
		<maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
      </properties>
</profile>
</profiles>



  <!-- activeProfiles
   | List of profiles that are active for all builds.
   |
  <activeProfiles>
    <activeProfile>alwaysActiveProfile</activeProfile>
    <activeProfile>anotherAlwaysActiveProfile</activeProfile>
  </activeProfiles>
  -->
</settings>

文章目录
1、什么是yum仓库?
2、yum仓库配置
2.1、配置 阿里镜像仓库
2.1.1、配置步骤
2.2、配置 清华大学镜像仓库（推荐）
3、epel源 安装和配置
3.1、查看yum源

1、什么是yum仓库?
yum仓库就是使用yum命令下载软件的镜像地址。
我们通常使用 yum install 命令来在线安装 linux系统的软件， 这种方式可以自动处理依赖性关系，并且一次安装所有依赖的软件包。众所周知，从国外下载软件速度非常慢，很多情况下都无法下载。国内一些大公司做镜像同步国外的软件， 那么我们可能使用国内的下载地址，就能下载我们需要的软件。
yum的配置文件

yum 的配置文件在 /etc/yum.repos.d 目录下, 其中有多个配置文件,每一个配置文件中都可以配置一个或多个repository, 但是最终会被合并为一个交给系统，所以多个文件只是为了方便管理。
2、yum仓库配置
下面提供了   阿里 和  清华大学    两个镜像仓库配置操作说明，实际使用时，选择其中一个配置即可
2.1、配置 阿里镜像仓库
进入   阿里巴巴开源镜像站


点击 centos ，进行配置说明页面，如下图所示：

2.1.1、配置步骤
根据官网的说明，分别有 CentOS 6、CentOS 7、CentOS 8等配置操作步骤。
（1）、备份，将 CentOS-Base.repo 为CentOS-Base.repo.backup
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

（2）、下载新的 http://mirrors.aliyun.com/repo/Centos-7.repo,并命名为CentOS-Base.repo
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
或者
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

（3）、清除缓存
yum clean all     # 清除系统所有的yum缓存
yum makecache     # 生成yum缓存

2.2、配置 清华大学镜像仓库（推荐）
地址： https://mirrors.cnnic.cn/


点击 ? 进入帮助说明页面 https://mirrors.cnnic.cn/help/centos/。

页面提供了 CentOS5，CentOS6、CentOS7 的镜像仓库配置，下面列出的是CentOS7的配置。
（1）、首先备份 CentOS-Base.repo
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

（2）、之后启用 TUNA 软件仓库， 将清华大学镜像仓库信息写入 /etc/yum.repos.d/CentOS-Base.repo
vim /etc/yum.repos.d/CentOS-Base.repo

将 CentOS-Base.repo 中的内容 更新为 下面的内容：
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#

[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

（3）、清除缓存
yum clean all     # 清除系统所有的yum缓存
yum makecache     # 生成yum缓存

3、epel源 安装和配置
（1）、查看可用的epel源
[java@localhost yum.repos.d]$ yum list | grep epel-release
epel-release.noarch                         7-11                       extras   
[java@localhost yum.repos.d]$ 

（2）、安装 epel
[java@localhost yum.repos.d]$ yum install -y epel-release
......省略.....

（3）、配置阿里镜像提供的epel源
wget -O /etc/yum.repos.d/epel-7.repo  http://mirrors.aliyun.com/repo/epel-7.repo

（4）、清除缓存
yum clean all     # 清除系统所有的yum缓存
yum makecache     # 生成yum缓存

3.1、查看yum源
查看所有的yum源：
yum repolist all

查看可用的yum源：
yum repolist enabled

1,首先要有oracle数据库或者有oracle服务器，才可以实现使用PLSQL Developer 工具连接到oracle数据库进行开发.

链接：https://pan.baidu.com/s/1QtMPpv8XxZohdKvUgw1GRQ 

提取码：lce6 

2,下载PLSQLDeveloper并解压





 

3,

配置环境变量

1) 变量名：ORACLE_HOME  变量值：E:\tool_01\PLSQL Developer\instantclient_11_2

2) 变量名：TNS_ADMIN  变量值：E:\tool_01\PLSQL Developer\instantclient_11_2

3) 变量名：NLS_LANG   变量值：SIMPLIFIED CHINESE_CHINA.ZHS16GBK

4) 修改Path变量，在后面添加 E:\tool_01\PLSQL Developer\instantclient_11_2



注意：根据自己的路径相应更改1）2）和4）的变量值，我是直接解压在E盘下的，路径就是上述路径了。3）照抄即可

4,

 

配置oracle监听文件

    找到E:\PLSQLDeveloper\PLSQL\instantclient_11_2路径下的tnsnames.ora文件，用编辑器打开（记事本也可以）。

    根据自己实际需要进行编辑，如下图所示。ORCL_27是显示的数据库名，HOST后面填的是所要连接的地址。编辑好以后保存。



5,打开E:\PLSQLDeveloper\PLSQL\PLSQL Developer文件夹下的plsqldev.exe文件，右击，以管理员身份运行。



6,填入你要连接的数据库的用户名和密码，并在数据库一栏的下拉列表中选择你要连接的数据库。若在此步无法显示数据库名称，则进行下述步骤



7,

点击工具-》首选项，如下图所示。

Oracle主目录名

 

E:\tool_01\PLSQL Developer\instantclient_11_2

 

OCI库

 

E:\tool_01\PLSQL Developer\instantclient_11_2\oci.dll



重新启动就可以啦~