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jq：从 JSON 清单里找出想要的信息

先在官方在线练习页，用虚构任务清单学会筛选一条 JSON 数据。

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适合刚接触接口结果、配置文件或结构化数据的人。先看懂一个筛选表达式，再考虑在本机批量处理文件。

시작 전 준비

지원 환경: 跨平台
내용 업데이트: 2026-10-27

在线第一练习只需现代浏览器与虚构 JSON，不需要先安装编译工具。
需要本机处理文件时，从官方 releases 选择对应操作系统/架构的程序；Windows 的程序名与路径要核对。

本轮表达式填入官方练习页的筛选框；它不是 PowerShell 命令。命令行版另按所用终端处理引号。

흔한 문제

JSON 键名与字符串必须使用双引号；本练习的 true 是布尔值，不是带引号的字符串。
不要把访问令牌、客户记录或私人配置粘贴到在线练习页或分享链接；网页服务的运行与保存方式需按其说明核对。
批量处理前保留原件，不要把输出直接覆盖输入；JSON 大数字也需额外确认精度。
jq 主代码 MIT 不覆盖 docs/ 文档 CC BY 3.0，也不取代 COPYING 所列组件和网站依赖条款。

공식 설치 안내 ↗

전체 본문

【小目标】从两条 JSON 记录中找出已完成的姓名，并解释条件变化为何改变输出。

【开始前准备】在线第一练习只需现代浏览器与虚构 JSON，不需要先安装编译工具。
需要本机处理文件时，从官方 releases 选择对应操作系统/架构的程序；Windows 的程序名与路径要核对。

【三步尝试】1. 打开官方练习页：访问 play.jqlang.org，清楚区分输入 JSON、筛选表达式与输出区域。只放虚构内容。
2. 准备两条虚构数据：在 JSON 输入区填入 [{"name":"Xiaobu","done":true},{"name":"Aqing","done":false}]。确认括号、逗号和双引号成对。
3. 筛选并改变一个条件：输入 .[] | select(.done == true) | .name，预期只输出 "Xiaobu"。再把第二条 done 改为 true，观察为什么会多出一个结果。

【检查结果】初始数据对应的输出是 JSON 字符串 "Xiaobu"；修改第二条状态后应看到两个姓名。

【来源与许可】官方仓库 jqlang/jq；固定提交 34f7186b86743a083a589741b6cea95293524108，提交日期 2026-06-20（UTC）。2026-10-27 复核的稳定实用项目，不作为本轮实时热榜项目宣称。
jq 主代码为 MIT；本条保留完整 COPYING，不裁去其中的其他声明。COPYING 另将 docs/ 文档列为 CC BY 3.0，并列明 dtoa.c、decNumber、Heimdal、NetBSD 等组件条款与文档站依赖；主 MIT 不覆盖这些内容。本条为原创导览，不复制文档站或分发二进制。

本站只提供原创导览和官方入口，导览按 CC BY 4.0 分享；不捆绑上游源码、安装包、图标、模型或用户素材。项目许可不自动覆盖依赖、商标、模型服务或托管平台，具体分发产物须另行核对。

2026-10-27 已只读核对官方固定提交的资料、完整许可和适用声明，按资料编写这份练习；本站未安装、登录或运行上游项目，也未进行安全审计。预期结果是供你自行核对的目标，不是本站实机测试记录。

사용 방법

从两条 JSON 记录中找出已完成的姓名，并解释条件变化为何改变输出。

打开官方练习页
访问 play.jqlang.org，清楚区分输入 JSON、筛选表达式与输出区域。只放虚构内容。
准备两条虚构数据
在 JSON 输入区填入 [{"name":"Xiaobu","done":true},{"name":"Aqing","done":false}]。确认括号、逗号和双引号成对。
筛选并改变一个条件
输入 .[] | select(.done == true) | .name，预期只输出 "Xiaobu"。再把第二条 done 改为 true，观察为什么会多出一个结果。

예상 출력

初始数据对应的输出是 JSON 字符串 "Xiaobu"；修改第二条状态后应看到两个姓名。

2026-10-27 已只读核对官方固定提交的资料、完整许可和适用声明，按资料编写这份练习；本站未安装、登录或运行上游项目，也未进行安全审计。预期结果是供你自行核对的目标，不是本站实机测试记录。

적합한 용도

适合刚接触接口结果、配置文件或结构化数据的人。先看懂一个筛选表达式，再考虑在本机批量处理文件。

사용 전 주의

jq 主代码为 MIT；本条保留完整 COPYING，不裁去其中的其他声明。COPYING 另将 docs/ 文档列为 CC BY 3.0，并列明 dtoa.c、decNumber、Heimdal、NetBSD 等组件条款与文档站依赖；主 MIT 不覆盖这些内容。本条为原创导览，不复制文档站或分发二进制。
JSON 键名与字符串必须使用双引号；本练习的 true 是布尔值，不是带引号的字符串。
不要把访问令牌、客户记录或私人配置粘贴到在线练习页或分享链接；网页服务的运行与保存方式需按其说明核对。
批量处理前保留原件，不要把输出直接覆盖输入；JSON 大数字也需额外确认精度。
jq 主代码 MIT 不覆盖 docs/ 文档 CC BY 3.0，也不取代 COPYING 所列组件和网站依赖条款。

작성자와 출처

저작자 표시: 本站导览
원본 작성자: Stephen Dolan 与 jq 贡献者；COPYING 主代码版权：jq is copyright (C) 2012 Stephen Dolan
원본 저장소: https://github.com/jqlang/jq
원본 버전: 34f7186b86743a083a589741b6cea95293524108
라이선스 확인일: 2026-10-27

고지 및 수정 내용

官方仓库 jqlang/jq；固定提交 34f7186b86743a083a589741b6cea95293524108，提交日期 2026-06-20（UTC）。2026-10-27 复核的稳定实用项目，不作为本轮实时热榜项目宣称。

전체 라이선스

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jq incorporates David M. Gay's dtoa.c and g_fmt.c, which bear the
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jv_thread.h is copied from Heimdal's lib/base/heimbase.h and some code
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2026-10-27