JSON.CN让代码更轻
JSON 结构对比可运行案例

备份清单：解释 backups 首部插入导致的多处差异

数组按下标逐项比较。在 backups 开头插入记录后，后续元素位置移动，会产生多处修改和一个尾部新增；这不等于多条业务记录都发生了真实字段变更。需要按 ID 配对时应先在自己的业务逻辑中处理。

浏览器本地处理合成数据同场景 32 个案例 ↗
试一试

示例工作台

在完整工具中打开 ↗
JSON 结构对比修改下方数据后重新运行
运行结果
[
  {
    "op": "replace",
    "path": "/data/backups/0/backupId",
    "oldValue": "demo-backups-1",
    "value": "demo-inserted"
  },
  {
    "op": "replace",
    "path": "/data/backups/0/fileName",
    "oldValue": "demo-database.json",
    "value": "新增演示记录"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/backupId",
    "oldValue": "demo-backups-2",
    "value": "demo-backups-1"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/fileName",
    "oldValue": "demo-assets.tar",
    "value": "demo-database.json"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/bytes",
    "oldValue": 16384,
    "value": 4096
  },
  {
    "op": "replace",
    "path": "/data/backups/1/verified",
    "oldValue": false,
    "value": true
  },
  {
    "op": "replace",
    "path": "/data/backups/1/storageClass",
    "oldValue": "archive",
    "value": "local"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/manifest/parts/0",
    "oldValue": "images",
    "value": "schema"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/manifest/parts/1",
    "oldValue": "styles",
    "value": "rows"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/manifest/checksum",
    "oldValue": "demo-checksum-b",
    "value": "demo-checksum-a"
  },
  {
    "op": "add",
    "path": "/data/backups/2",
    "value": {
      "backupId": "demo-backups-2",
      "fileName": "demo-assets.tar",
      "bytes": 16384,
      "verified": false,
      "storageClass": "archive",
      "manifest": {
        "parts": [
          "images",
          "styles"
        ],
        "checksum": "demo-checksum-b"
      }
    }
  }
]

原例已核验，可修改输入后重新运行。

⌘ / Ctrl + Enter 运行
01

场景与操作说明

备份清单同时记录文件标识、大小、存储类别和分片清单。下面用数据库与资源归档两条记录，练习提取备份文件名、检查字节数和比较校验标记；恢复能力仍需单独验证。

bytes 为示例文件字节数，压缩前后大小应分开记录。

  1. 核对 备份清单 的字段层级，保留 backupId 的字符串类型。
  2. 修改一项输入并运行，观察结果中的值或路径如何变化。
  3. 载入对照样本，复现下面的变化；恢复原例会替换当前输入。
02

对照样本

对照样本交换 A 与 B。观察新增与删除的方向、修改前后值如何反转；没有差异时交换仍无差异。

查看对照输入
{
  "ok": true,
  "data": {
    "backups": [
      {
        "backupId": "demo-inserted",
        "fileName": "新增演示记录",
        "bytes": 4096,
        "verified": true,
        "storageClass": "local",
        "manifest": {
          "parts": [
            "schema",
            "rows"
          ],
          "checksum": "demo-checksum-a"
        }
      },
      {
        "backupId": "demo-backups-1",
        "fileName": "demo-database.json",
        "bytes": 4096,
        "verified": true,
        "storageClass": "local",
        "manifest": {
          "parts": [
            "schema",
            "rows"
          ],
          "checksum": "demo-checksum-a"
        }
      },
      {
        "backupId": "demo-backups-2",
        "fileName": "demo-assets.tar",
        "bytes": 16384,
        "verified": false,
        "storageClass": "archive",
        "manifest": {
          "parts": [
            "images",
            "styles"
          ],
          "checksum": "demo-checksum-b"
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}
{
  "ok": true,
  "data": {
    "backups": [
      {
        "backupId": "demo-backups-1",
        "fileName": "demo-database.json",
        "bytes": 4096,
        "verified": true,
        "storageClass": "local",
        "manifest": {
          "parts": [
            "schema",
            "rows"
          ],
          "checksum": "demo-checksum-a"
        }
      },
      {
        "backupId": "demo-backups-2",
        "fileName": "demo-assets.tar",
        "bytes": 16384,
        "verified": false,
        "storageClass": "archive",
        "manifest": {
          "parts": [
            "images",
            "styles"
          ],
          "checksum": "demo-checksum-b"
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}

对照样本的实际结果

[
  {
    "op": "replace",
    "path": "/data/backups/0/backupId",
    "oldValue": "demo-inserted",
    "value": "demo-backups-1"
  },
  {
    "op": "replace",
    "path": "/data/backups/0/fileName",
    "oldValue": "新增演示记录",
    "value": "demo-database.json"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/backupId",
    "oldValue": "demo-backups-1",
    "value": "demo-backups-2"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/fileName",
    "oldValue": "demo-database.json",
    "value": "demo-assets.tar"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/bytes",
    "oldValue": 4096,
    "value": 16384
  },
  {
    "op": "replace",
    "path": "/data/backups/1/verified",
    "oldValue": true,
    "value": false
  },
  {
    "op": "replace",
    "path": "/data/backups/1/storageClass",
    "oldValue": "local",
    "value": "archive"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/manifest/parts/0",
    "oldValue": "schema",
    "value": "images"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/manifest/parts/1",
    "oldValue": "rows",
    "value": "styles"
  },
  {
    "op": "replace",
    "path": "/data/backups/1/manifest/checksum",
    "oldValue": "demo-checksum-a",
    "value": "demo-checksum-b"
  },
  {
    "op": "remove",
    "path": "/data/backups/2",
    "oldValue": {
      "backupId": "demo-backups-2",
      "fileName": "demo-assets.tar",
      "bytes": 16384,
      "verified": false,
      "storageClass": "archive",
      "manifest": {
        "parts": [
          "images",
          "styles"
        ],
        "checksum": "demo-checksum-b"
      }
    }
  }
]