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unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["jsr385","unit"],"created_at":"2026-02-13T23:25:20.397Z","updated_at":"2026-02-13T23:25:20.979Z","avatar_url":"https://github.com/cooder-org.png","language":"Java","funding_links":[],"categories":[],"sub_categories":[],"readme":"\n# cooder-units\n\n![build](https://github.com/cooder-org/cooder-units/actions/workflows/maven.yml/badge.svg)\n[![codecov](https://codecov.io/gh/cooder-org/cooder-units/branch/main/graph/badge.svg?token=0L2AU184LV)](https://codecov.io/gh/cooder-org/cooder-units)\n[![Maven Central](https://img.shields.io/maven-central/v/org.cooder/cooder-units.svg?label=Maven%20Central)](https://search.maven.org/search?q=g:%22org.cooder%22%20AND%20a:%22cooder-units%22)\n\n带单位计算库。\n\n现实生活中的很多量都是带单位的，缺少单位时的数值本身没有任何含义，只进行数值运算后附加单位的做法非常容易导致bug。\n不难理解，对于带单位量的计算过程，也应该让单位参与运算。\n这个库通过封装jsr-385，提供了单位参与运算的能力，并内置了一些常见的非标准单位。\n\n## 依赖\n- 依赖 [jsr-385](https://jcp.org/aboutJava/communityprocess/mrel/jsr385/index.html)\n- 依赖 jsr-385's reference implementation: [indriya](https://github.com/unitsofmeasurement/indriya)\n\n## JDK版本\njdk1.8+\n\n## 如何使用\n\n0、引入依赖（Maven）  \n```xml\n\u003cdependency\u003e\n  \u003cgroupId\u003eorg.cooder\u003c/groupId\u003e\n  \u003cartifactId\u003ecooder-units\u003c/artifactId\u003e\n  \u003cversion\u003e${version}\u003c/version\u003e\n\u003c/dependency\u003e\n```\n\n1、初始化\n```java\n    Units.init()\n```\n\n2、创建带单位的量\n方法1: \n```java\n  UnitNumber\u003c?\u003e 规格 = UnitNumber.parse(\"5 kg/桶\");\n```\n\n方法2:\n```java\n  import static org.cooder.units.Units.*;\n  \n  UnitNumber\u003c?\u003e 规格 = new UnitNumber(5, 千克.divide(桶));\n```\n**建议优先使用方法2**\n\n3、带单位加法\n```java\n  UnitNumber\u003cLength\u003e length = UnitNumber.parse(\"10 m\").asType(Length.class);\n  UnitNumber\u003cLength\u003e width = UnitNumber.parse(\"20 cm\").asType(Length.class);\n  UnitNumber\u003cLength\u003e sum = length.add(width);\n```\n\n4、带单位减法\n```java\n  UnitNumber\u003cLength\u003e length = UnitNumber.parse(\"10 m\").asType(Length.class);\n  UnitNumber\u003cLength\u003e width = UnitNumber.parse(\"20 cm\").asType(Length.class);\n  UnitNumber\u003cLength\u003e sub = length.subtract(width);\n```\n\n5、带单位乘法\n```java\n  UnitNumber\u003cLength\u003e length = UnitNumber.parse(\"10 m\").asType(Length.class);\n  UnitNumber\u003cLength\u003e width = UnitNumber.parse(\"20 cm\").asType(Length.class);\n  UnitNumber\u003c?\u003e area = length.multipy(width);\n  \n  // 如果需要校验结果单位是否符合预期，可以这样：\n  area.assertMustBe(Units.平方米);\n  \n  // 或直接这样：\n  UnitNumber\u003c?\u003e area = length.multipy(width).assertMustBe(Units.平方米);\n\n```\n\n6、带单位除法\n```java\n  UnitNumber\u003c?\u003e 规格 = UnitNumber.parse(\"5 kg/桶\");\n  UnitNumber\u003c?\u003e 使用量 = UnitNumber.parse(\"500 千克\");\n  UnitNumber\u003c?\u003e 下单量 = 使用量.divide(规格).assertMustBe(symbolFor(\"桶\"));\n  Assert.assertTrue(下单量.getValue().equals(100));\n```\n\n7、查找单位实例\n```java\n  // 通过单位符号\n  Unit unit1 = Units.symbolFor(\"kg\");\n\t\n  // 通过单位别名\n  Unit unit2 = Units.nameFor(\"千克\");\n\n  // 组合单位时\n  Unit unit3 = Units.parse(\"千克/桶\");\n```\n\n8、单位转换\n```java\n  UnitNumber\u003cWorkTime\u003e m = parse(\"10 人时\").asType(WorkTime.class);\n  m = m.to(Units.人天);\n  Assert.assertTrue(\"1.25 人天\".equals(m.toString()));\n```\n\n## 提示\n乘法和除法时会将单位自动转化为国际单位制，如果需要转换为其他非标准单位，可以使用UnitNumber#to方法。\n\n其他更多用法请参考项目的java doc.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcooder-org%2Fcooder-units","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fcooder-org%2Fcooder-units","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcooder-org%2Fcooder-units/lists"}