如何在java.util.Map<String，Object>中转换google.protobuf.Struct字段？

<dependency>
    <groupId>com.google.protobuf</groupId>
    <artifactId>protobuf-java-util</artifactId>
    <version>3.18.0</version>
</dependency>

implementation 'com.google.protobuf:protobuf-java-util:3.18.0'

import com.google.protobuf.Struct;
import com.google.protobuf.util.JsonFormat;

import java.util.HashMap;
import java.util.Map;

public class MapStructConverter {
    public static void main(String[] args) throws Exception {
        // 创建一个Map对象
        Map<String, Object> map = new HashMap<>();
        map.put("name", "John");
        map.put("age", 25);

        // 将Map转换为google.protobuf.Struct
        Struct struct = Struct.newBuilder().putAllFields(map).build();

        // 将google.protobuf.Struct转换为JSON字符串
        String json = JsonFormat.printer().print(struct);
        System.out.println("JSON: " + json);

        // 将JSON字符串转换为google.protobuf.Struct
        Struct.Builder structBuilder = Struct.newBuilder();
        JsonFormat.parser().merge(json, structBuilder);
        Struct convertedStruct = structBuilder.build();

        // 将google.protobuf.Struct转换为Map
        Map<String, Object> convertedMap = convertedStruct.getFieldsMap();
        System.out.println("Converted Map: " + convertedMap);
    }
}