wordpress后台运行速度慢,seo优化策略,网站返回500错误,阳泉营销型网站建设#xff08;一#xff09;Maven简介 Apache Maven是一个项目管理和构建的工具#xff0c;它基于项目对象模型#xff08;POM#xff09;的概念。通过一小段描述信息来管理项目的构建#xff0c;报告和文档。○ 项目对象模型○ 依赖管理模型○ 插件• 仓库分类#xff1a…一Maven简介 Apache Maven是一个项目管理和构建的工具它基于项目对象模型POM的概念。通过一小段描述信息来管理项目的构建报告和文档。○ 项目对象模型○ 依赖管理模型○ 插件• 仓库分类本地仓库自己计算机上的一个目录中央仓库有Maven团队维护的全球唯一的仓库地址https://repo1.maven.org/maven2/远程仓库私服一般由公司团队搭建的私有仓库
• 当项目中使用坐标引入对应依赖的jar包后首先会查找本地仓库中是否有对应的jar包如果有则在项目直接引用如果没有则去中央仓库中下载对应的jar包到本地仓库
• 还可以搭建远程仓库将来jar包的查找顺序则变为本地仓库--远程仓库--中央仓库Maven是专门用于管理和构建Java项目的工具它的主要功能有□ 提供了一套标准化的项目结构□ 提供了一套标准化的构建流程编译测试打包发布…□ 提供了一套依赖管理机制二Maven下载与配置 1、 Maven下载[链接](https://maven.apache.org/download.cgi)2、下载完成之后选择一个你认为合适的路径解压。3、 配置环境变量 右键点击 此电脑 -- 属性 --高级系统设置(在弹出的页面中系统变量点击新建)4、配置conf/Settings.xml
Settings的配置具体如下但是注意本地仓库的路径根据自己情况设定。?xml version1.0 encodingUTF-8?!--
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--!--| 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 theyre all using the same Maven| installation). Its 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 xmlnshttp://maven.apache.org/SETTINGS/1.2.0xmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://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/repositorylocalRepository/path/to/local/repo/localRepository--localRepositoryD:\SoftwareTools\Maven\MavenSoftware\mvn_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: trueinteractiveModetrue/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: falseofflinefalse/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.pluginGroupcom.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.|proxyidoptional/idactivetrue/activeprotocolhttp/protocolusernameproxyuser/usernamepasswordproxypass/passwordhostproxy.host.net/hostport80/portnonProxyHostslocal.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.|serveriddeploymentRepo/idusernamerepouser/usernamepasswordrepopwd/password/server--!-- Another sample, using keys to authenticate.serveridsiteServer/idprivateKey/path/to/private/key/privateKeypassphraseoptional; 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.|--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.|mirroridmirrorId/idmirrorOfrepositoryId/mirrorOfnameHuman Readable Name for this Mirror./nameurlhttp://my.repository.com/repo/path/url/mirror--mirroridalimaven/idnamealiyun maven/nameurlhttp://maven.aliyun.com/nexus/content/groups/public//urlmirrorOfcentral/mirrorOf/mirrormirroridmaven-default-http-blocker/idmirrorOfexternal:http:*/mirrorOfnamePseudo repository to mirror external repositories initially using HTTP./nameurlhttp://0.0.0.0//urlblockedtrue/blocked/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.||--profiles!-- profile| 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 ids for debug.|| This profile example uses the JDK version to trigger activation, and provides a JDK-specific repo.profileidjdk-1.4/idactivationjdk1.4/jdk/activationrepositoriesrepositoryidjdk14/idnameRepository for JDK 1.4 builds/nameurlhttp://www.myhost.com/maven/jdk14/urllayoutdefault/layoutsnapshotPolicyalways/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| groupIdorg.myco.myplugins/groupId| artifactIdmyplugin/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.|profileidenv-dev/idactivationpropertynametarget-env/namevaluedev/value/property/activationpropertiestomcatPath/path/to/tomcat/instance/tomcatPath/properties/profile--profileidjdk-17/idactivationactiveByDefaulttrue/activeByDefaultjdk17/jdk/activationpropertiesproject.build.sourceEncodingUTF-8/project.build.sourceEncodingmaven.compiler.source17/maven.compiler.sourcemaven.compiler.target17/maven.compiler.targetmaven.compiler.compilerVersion17/maven.compiler.compilerVersion/properties/profile/profiles!-- activeProfiles| List of profiles that are active for all builds.|activeProfilesactiveProfilealwaysActiveProfile/activeProfileactiveProfileanotherAlwaysActiveProfile/activeProfile/activeProfiles--
/settings 1、Maven生命周期w Maven构建项目生命周期描述的是一次构建过程经历经历了多少个事件w Maven对项目构建的生命周期划分为3套Ø clean清理工作Ø default核心工作例如编译、测试、打包和安装等Ø site产生报告、发布站点等w 同一生命周期内执行后面的命令前面的所有命令会自动执行。三IDEA配置Maven IDEA配置Maven环境的步骤1) 选择IDEA中File--Settings2) 搜索maven3) 设置IDEA使用本地安装的Maven并修改配置文件路径Maven坐标详解什么是坐标Ø Maven中的坐标是资源的唯一标识Ø 使用坐标来定义项目或引入项目中需要的依赖§ Maven坐标主要组成Ø groupId定义当前Maven项目隶属组织名称通常是域名的反写如com.itheimaØ artifactId定义当前Maven项目名称通常是模块名称例如order-servicegoods-serviceØ version定义当前项目版本号项目坐标如groupIdcom.itheima/groupIdartifactIdmaven-demo/artifactIdversion1.0-SNAPSHOT/version– IDEA配置Maven-Helper插件1) 选择IDEA中File--Settings2) 选择plugins3) 搜索Maven选择第一个Maven Helper点击install安装弹出面板中4) 重启IDEA
