Gradle Build 构建 & Maven Repositories & Artifacts - 知名开源项目库、仓库POM文件 | Jib Plugin

综合/最新

新：
  Gradle 9.x 起：
    用 gradle -p subproject test 取代了 gradle -b subproject/build.gradle test；脚本文件名更改用 project(':subproject').buildFileName = 'custom.gradle'
    archivesBaseName 已改名为 archivesName
    必须加上 java. 前缀 java.sourceCompatibility = JavaVersion.VERSION_25

指定构建所用Java版本，不再沿用 Gradle 自身运行Java版本：
  java { toolchain { languageVersion = JavaLanguageVersion.of(17) } }
  settings.gradle.kts 指定JDK工具链下载配置 plugins { id("org.gradle.toolchains.foojay-resolver-convention").version("1.0.0") }

  字节码版本也能在 toolchain 基础上向下指定 tasks.withType().configureEach { options.release = 11 }

Kotlin变量声明：并非var而是 val k=v

数组追加：
  var cmd = arrayOf("echo", "1");
  if(org.gradle.internal.os.OperatingSystem.current().isWindows()){
    cmd += arrayOf("|","Get-Member");
  }
  println(cmd.joinToString())

Kotlin导入类：必须写在顶部 - import java.time.Instant 使用 - Instant.now().toString().replace(":", "_")

操作文件前判断是否存在：即Kotlin的三元表达式
  val txtFile=file("../../../../docs/cloud/project-123456.json")
  password = if (txtFile.exists()) txtFile.readText() else null

Gradle

目录：
  可无脑删 - .gradle/、.idea/、build/

installDist 任务只安装（./build/install/app/bin/app）不打包，assembleDist 则只打包（build/distributions/app.zip）不安装。

凭据从两处取得：
  credentials { username = "our"; password = System.getenv("ORG_GRADLE_PROJECT_OurMavenRepoPassword") }
  //credentials(PasswordCredentials::class) // 若只赋值 username 则 password 会初始化为 null，也不会从前缀型环境变量取值了。

构建容器镜像

build.gradle.kts
plugins {
    application
    id("com.google.cloud.tools.jib") version "3.4.5"
}
jib{
    from {
        // 打包后210MiB；默认 eclipse-temurin:21-jre；jlink 容器大小优化 - blog.csdn.net/zypqqgc/article/details/142070527
        image = "eclipse-temurin:24-jre-alpine"
    }
    to {
        /*
        tags = mutableSetOf(Instant.now().toString().replace(":", "_"))
        image = "asia-east1-docker.pkg.dev/project-123456/temp-repo/new-tech"
        auth {
            username = "_json_key"
            val txtFile=file("../../../../docs/cloud/project-123456-8ad030ce3d3e.json")
            password = if (txtFile.exists()) txtFile.readText() else null
        }
        */
        tags = mutableSetOf("new-tech-"+Instant.now().toString().replace(":", "_"))
        image = "dockerhubuser/private" // docker.io/dockerhubuser/private:new-tech-0.0.1b1
        auth {
            username = "dockerhubuser"
            password = System.getenv("DOCKER_PASSWORD")?:"" // ALIYUN_DOCKER_PASSWORD
        }

        containerizingMode = "packaged" // jar包目标路径 /app/classpath/main-class.jar、/app/libs/jetty-server-12.0.16.jar
    }
    container {
        jvmFlags = mutableListOf("-XX:MaxRAMPercentage=95","-XX:+UseZGC","-XX:+CrashOnOutOfMemoryError")
        mainClass = application.mainClass.get() // 多个主类时才需指定
    }
}

知名项目库

MySQL Connector/J

implementation("com.mysql:mysql-connector-j:9.1.0")

Jakarta Servlet

compileOnly("jakarta.servlet:jakarta.servlet-api:6.1.0")

JSON Web Token (JWT)

implementation("com.auth0:java-jwt:4.4.0")

Spring Authorization Server

implementation("org.springframework.boot:spring-boot-starter-oauth2-authorization-server:3.4.1")

Google Cloud Libraries Bill of Materials (BOM)

implementation(platform("com.google.cloud:libraries-bom:26.53.0"))

其他

hutool 读取 CSV 文件：
   // reader.read(isr, Info.class); public static class Info{ @Alias("My_Name") private String myName; } // getter/setter
  var data = CsvUtil.getReader().read(FileUtil.file("dir/x.csv")); // ResourceUtil.getUtf8Reader("dir/x.csv")
  var rows = data.getRows();
  for (var r : rows) { System.out.println(r.getRawList()); } // r.getByName("f")