Java程序如何合并本地集合与远端接口数据？

<code class="java">import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class DataMerger {

    public static void main(String[] args) throws Exception {
        // 1. 获取本地数据
        Map<String, String> localData = fetchLocalData();

        // 2. 获取远程数据
        Map<String, String> remoteData = fetchRemoteData();

        // 3. 合并数据
        List<MergedData> mergedData = mergeData(localData, remoteData);

        // 4. 打印合并结果
        System.out.println(mergedData);
    }

    // 模拟本地数据获取
    private static Map<String, String> fetchLocalData() {
        Map<String, String> data = new HashMap<>();
        data.put("id", "1");
        data.put("name", "John Doe");
        return data;
    }

    // 模拟远程数据获取
    private static Map<String, String> fetchRemoteData() {
        Map<String, String> data = new HashMap<>();
        data.put("id", "1");
        data.put("address", "123 Main St");
        return data;
    }

    // 数据合并函数
    private static List<MergedData> mergeData(Map<String, String> local, Map<String, String> remote) {
        return local.entrySet().stream()
                .filter(entry -> remote.containsKey(entry.getKey()))
                .map(entry -> new MergedData(entry.getKey(), entry.getValue(), remote.get(entry.getKey())))
                .collect(Collectors.toList());
    }

    // 合并后的数据结构
    static class MergedData {
        String id;
        String name;
        String address;

        MergedData(String id, String name, String address) {
            this.id = id;
            this.name = name;
            this.address = address;
        }

        @Override
        public String toString() {
            return "{" +
                    "id='" + id + '\'' +
                    ", name='" + name + '\'' +
                    ", address='" + address + '\'' +
                    '}';
        }
    }
}</code>