使用Okhttp服务器不支持缓存的解决办法

import okhttp3.Interceptor;
import okhttp3.Request;
import okhttp3.Response;
import java.io.IOException;
public class CacheInterceptor implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request = chain.request();
        // 先尝试从缓存中获取数据
        Response response = chain.proceed(request);
        // 设置缓存控制头
        int maxAge = 60; // 缓存有效期为60秒
        return response.newBuilder()
                .removeHeader("Pragma") // 清除头信息
                .removeHeader("Cache-Control")
                .header("Cache-Control", "public, max-age=" + maxAge)
                .build();
    }
}

import okhttp3.Cache;
import okhttp3.OkHttpClient;
import java.io.File;
import java.util.concurrent.TimeUnit;
public class HttpClient {
    private static final long DEFAULT_CACHE_SIZE = 10 * 1024 * 1024; // 10 MB
    public static OkHttpClient createClient() {
        // 设置缓存目录
        File cacheFile = new File(BaseApp.getInstance().getCacheDir(), "cacheData");
        Cache cache = new Cache(cacheFile, DEFAULT_CACHE_SIZE);
        // 创建 OkHttpClient
        return new OkHttpClient.Builder()
                .retryOnConnectionFailure(true) // 连接失败后是否重新连接
                .connectTimeout(15, TimeUnit.SECONDS) // 超时时间15秒
                .addNetworkInterceptor(new CacheInterceptor()) // 添加网络拦截器
                .cache(cache) // 设置缓存
                .build();
    }
}

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Request;
import okhttp3.Response;
import java.io.IOException;
public class NetworkRequest {
    public void fetchData(String url) {
        OkHttpClient client = HttpClient.createClient();
        Request request = new Request.Builder()
                .url(url)
                .build();
        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                // 处理请求失败
                e.printStackTrace();
            }
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                if (response.isSuccessful()) {
                    // 处理成功的响应
                    String responseData = response.body().string();
                    // 处理数据...
                } else {
                    // 处理错误响应
                }
            }
        });
    }
}