目录

  1. Java 环境配置
    1. 下载 JDK
    2. 服务器配置
  2. gradle 配置
    1. 下载 gradle
    2. 配置
    3. 配置下载加速

Java 环境配置

Java 的环境配置主要分为两步：下载 Java 开发环境（JDK）以及配置 JAVA_HOME 环境变量

下载 JDK

由于现在下载 JDK 需要验证，所以只能先下载到本地，然后上传到服务器

前往Oracle 官网，下载 JDK8，根据自己的系统位数，选择相应的版本下载

系统位数下载版本
32 位jdk-8u45-linux-i586.tar.gz
64 位jdk-8u45-linux-x64.tar.gz

服务器配置

将 JDK 上传到服务器之后，距离使用 Java 还有以下几步（以JDK8为例）

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# 创建 jdk 目录
mkdir -p /usr/java
# 解压安装包
tar zxvf jdk-8u45-linux-x64.tar.gz
# 增加到环境变量中
vim /etc/profile
-----------------
export JAVA_HOME=/usr/java/jdk1.8.0_291
export PATH=${JAVA_HOME}/bin:$PATH
-----------------
# 测试
java -version

gradle 配置

gradle 是部分 Java 项目构建工作，因此本文介绍 Gradle 如何下载并配置

下载 gradle

📖前往gradle 官网下载到本地，并解压

配置

需要配置三个参数GRADLE_HOME，path，GRADLE_USER_HOME

参数含义
GRADLE_HOMEgradle 的基本路径
path命令执行时查找路径
GRADLE_USER_HOMEgradle 仓库

配置下载加速

✨Gradle 还是从 maven 仓库下载的，给 gradle 安装目录下 init.d 文件夹，放一个 init.gradle 文件即可完成加速

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gradle.projectsLoaded {
    rootProject.allprojects {
        buildscript {
            repositories {
                def JCENTER_URL = 'https://maven.aliyun.com/repository/jcenter'
                def GOOGLE_URL = 'https://maven.aliyun.com/repository/google'
                def NEXUS_URL = 'http://maven.aliyun.com/nexus/content/repositories/jcenter'
                all { ArtifactRepository repo ->
                    if (repo instanceof MavenArtifactRepository) {
                        def url = repo.url.toString()
                        if (url.startsWith('https://jcenter.bintray.com/')) {
                            project.logger.lifecycle "Repository ${repo.url} replaced by $JCENTER_URL."
                            println("buildscript ${repo.url} replaced by $JCENTER_URL.")
                            remove repo
                        }
                        else if (url.startsWith('https://dl.google.com/dl/android/maven2/')) {
                            project.logger.lifecycle "Repository ${repo.url} replaced by $GOOGLE_URL."
                            println("buildscript ${repo.url} replaced by $GOOGLE_URL.")
                            remove repo
                        }
                        else if (url.startsWith('https://repo1.maven.org/maven2')) {
                            project.logger.lifecycle "Repository ${repo.url} replaced by $REPOSITORY_URL."
                            println("buildscript ${repo.url} replaced by $REPOSITORY_URL.")
                            remove repo
                        }
                    }
                }
                jcenter {
                    url JCENTER_URL
                }
                google {
                    url GOOGLE_URL
                }
                maven {
                    url NEXUS_URL
                }
            }
        }
        repositories {
            def JCENTER_URL = 'https://maven.aliyun.com/repository/jcenter'
            def GOOGLE_URL = 'https://maven.aliyun.com/repository/google'
            def NEXUS_URL = 'http://maven.aliyun.com/nexus/content/repositories/jcenter'
            all { ArtifactRepository repo ->
                if (repo instanceof MavenArtifactRepository) {
                    def url = repo.url.toString()
                    if (url.startsWith('https://jcenter.bintray.com/')) {
                        project.logger.lifecycle "Repository ${repo.url} replaced by $JCENTER_URL."
                        println("buildscript ${repo.url} replaced by $JCENTER_URL.")
                        remove repo
                    }
                    else if (url.startsWith('https://dl.google.com/dl/android/maven2/')) {
                        project.logger.lifecycle "Repository ${repo.url} replaced by $GOOGLE_URL."
                        println("buildscript ${repo.url} replaced by $GOOGLE_URL.")
                        remove repo
                    }
                    else if (url.startsWith('https://repo1.maven.org/maven2')) {
                        project.logger.lifecycle "Repository ${repo.url} replaced by $REPOSITORY_URL."
                        println("buildscript ${repo.url} replaced by $REPOSITORY_URL.")
                        remove repo
                    }
                }
            }
            jcenter {
                url JCENTER_URL
            }
            google {
                url GOOGLE_URL
            }
            maven {
                url NEXUS_URL
            }
        }
    }
}