springboot2.5编译时对java程序的约定处理

	private void configureJavadocConventions(Project project) {
		project.getTasks().withType(Javadoc.class, (javadoc) -> {
			javadoc.getOptions().source("1.8").encoding("UTF-8");
			withOptionalBuildJavaHome(project, (javaHome) -> javadoc.setExecutable(javaHome + "/bin/javadoc"));
		});
	}

	private void configureJavaCompileConventions(Project project) {
		project.getTasks().withType(JavaCompile.class, (compile) -> {
			compile.getOptions().setEncoding("UTF-8");
			withOptionalBuildJavaHome(project, (javaHome) -> {
				compile.getOptions().setFork(true);
				compile.getOptions().getForkOptions().setJavaHome(new File(javaHome));
				compile.getOptions().getForkOptions().setExecutable(javaHome + "/bin/javac");
			});
			List args = compile.getOptions().getCompilerArgs();
			if (!args.contains("-parameters")) {
				args.add("-parameters");
			}
			if (JavaVersion.current() == JavaVersion.VERSION_1_8) {
				args.addAll(Arrays.asList("-Werror", "-Xlint:unchecked", "-Xlint:deprecation", "-Xlint:rawtypes",
						"-Xlint:varargs"));
			}
		});
	}

	private void withOptionalBuildJavaHome(Project project, Consumer consumer) {
		String buildJavaHome = (String) project.findProperty("buildJavaHome");// javahome取配置
		if (buildJavaHome != null && !buildJavaHome.isEmpty()) {
			consumer.accept(buildJavaHome);
		}
	}

	private void configureSpringJavaFormat(Project project) {
		project.getPlugins().apply(SpringJavaFormatPlugin.class);
		project.getTasks().withType(FormatTask.class, (formatTask) -> formatTask.setEncoding("UTF-8"));
		project.getPlugins().apply(CheckstylePlugin.class);
		CheckstyleExtension checkstyle = project.getExtensions().getByType(CheckstyleExtension.class);
		checkstyle.setToolVersion("8.29");// 设置checkstyle的版本为8.29
		checkstyle.getConfigDirectory().set(project.getRootProject().file("src/checkstyle"));
		String version = SpringJavaFormatPlugin.class.getPackage().getImplementationVersion();
		DependencySet checkstyleDependencies = project.getConfigurations().getByName("checkstyle").getDependencies();
		checkstyleDependencies
				.add(project.getDependencies().create("io.spring.javaformat:spring-javaformat-checkstyle:" + version));
	}

	private void configureDependencyManagement(Project project) {
		ConfigurationContainer configurations = project.getConfigurations();
		Configuration dependencyManagement = configurations.create("dependencyManagement", (configuration) -> {
			configuration.setVisible(false);
			configuration.setCanBeConsumed(false);
			configuration.setCanBeResolved(false);
		});
		configurations
				.matching((configuration) -> configuration.getName().endsWith("Classpath")
						|| JavaPlugin.ANNOTATION_PROCESSOR_CONFIGURATION_NAME.equals(configuration.getName()))
				.all((configuration) -> configuration.extendsFrom(dependencyManagement));
		Dependency springBootParent = project.getDependencies().enforcedPlatform(project.getDependencies()
				.project(Collections.singletonMap("path", ":spring-boot-project:spring-boot-parent")));
		dependencyManagement.getDependencies().add(springBootParent);
		// 通过项目插件容器配置可选依赖，这类依赖仅在该项目编译时生效，不会影响其他项目
		project.getPlugins().withType(OptionalDependenciesPlugin.class, (optionalDependencies) -> configurations
				.getByName(OptionalDependenciesPlugin.OPTIONAL_CONFIGURATION_NAME).extendsFrom(dependencyManagement));
	}

}

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