如何使用Jolt更改大型Json中某个字段的名称

<dependency>
    <groupId>com.bazaarvoice.jolt</groupId>
    <artifactId>jolt-core</artifactId>
    <version>0.1.0</version>
</dependency>

[
  {
    "operation": "shift",
    "spec": {
      "oldFieldName": "newFieldName"
    }
  }
]

import com.bazaarvoice.jolt.Chainr;
import com.bazaarvoice.jolt.JsonUtils;

public class JoltExample {
    public static void main(String[] args) {
        // 读取JSON数据
        String jsonInput = "{\"oldFieldName\": \"value\"}";

        // 读取Jolt规范
        String joltSpec = "[{\"operation\": \"shift\", \"spec\": {\"oldFieldName\": \"newFieldName\"}}]";

        // 执行Jolt转换
        Chainr chainr = Chainr.fromSpec(JsonUtils.jsonToList(joltSpec));
        Object transformedOutput = chainr.transform(JsonUtils.jsonToObject(jsonInput));

        // 打印转换后的JSON数据
        System.out.println(JsonUtils.toJsonString(transformedOutput));
    }
}