JSON在线对比指南：高效比较JSON文件的完整教程【2026】

// 预期响应
{
  "status": "success",
  "data": {
    "userId": 123,
    "name": "张三"
  }
}

// 实际响应
{
  "status": "success",
  "data": {
    "userId": 123,
    "name": "李四"
  }
}

// 版本1
{
  "database": {
    "host": "localhost",
    "port": 3306
  },
  "cache": {
    "enabled": false
  }
}

// 版本2
{
  "database": {
    "host": "production-db.example.com",
    "port": 3306
  },
  "cache": {
    "enabled": true,
    "ttl": 3600
  }
}

function compareJSON(obj1, obj2, path = '') {
  const diffs = [];
  const keys = new Set([...Object.keys(obj1 || {}), ...Object.keys(obj2 || {})]);
  
  for (const key of keys) {
    const currentPath = path ? `${path}.${key}` : key;
    const val1 = obj1?.[key];
    const val2 = obj2?.[key];
    
    if (val1 === undefined) {
      diffs.push({ type: 'added', path: currentPath, value: val2 });
    } else if (val2 === undefined) {
      diffs.push({ type: 'removed', path: currentPath, value: val1 });
    } else if (typeof val1 === 'object' && typeof val2 === 'object') {
      diffs.push(...compareJSON(val1, val2, currentPath));
    } else if (val1 !== val2) {
      diffs.push({ type: 'modified', path: currentPath, from: val1, to: val2 });
    }
  }
  
  return diffs;
}

const json1 = { name: "小明", age: 30, city: "北京" };
const json2 = { name: "小明", age: 31, country: "中国" };
console.log(compareJSON(json1, json2));

def compare_json(obj1, obj2, path=""):
    diffs = []
    keys = set(list(obj1.keys()) + list(obj2.keys()))
    
    for key in keys:
        current_path = f"{path}.{key}" if path else key
        val1 = obj1.get(key)
        val2 = obj2.get(key)
        
        if val1 is None and val2 is not None:
            diffs.append({"type": "added", "path": current_path, "value": val2})
        elif val2 is None and val1 is not None:
            diffs.append({"type": "removed", "path": current_path, "value": val1})
        elif isinstance(val1, dict) and isinstance(val2, dict):
            diffs.extend(compare_json(val1, val2, current_path))
        elif val1 != val2:
            diffs.append({"type": "modified", "path": current_path, "from": val1, "to": val2})
    
    return diffs

json1 = {"name": "小红", "settings": {"theme": "dark"}}
json2 = {"name": "小刚", "settings": {"theme": "light"}}
print(compare_json(json1, json2))

# 使用jq和diff
diff <(jq -S '.' file1.json) <(jq -S '.' file2.json)

# 使用Python的jsondiff库
pip install jsondiff
python -c "from jsondiff import diff; import json; print(diff(json.load(open('file1.json')), json.load(open('file2.json'))))"