java写一个http请求池化工具类

好的，这个我可以回答。Java中常用的HTTP请求工具有Apache HttpClient和OkHttp。我们可以通过封装这两个工具实现HTTP请求池化。具体实现可以通过使用线程池来管理多个Http请求，同时可以通过使用连接池等技术来优化HTTP请求性能。如果您需要更具体的实现细节，可以参考一些开源的HTTP请求池化项目。

相关问题

用java写一个OkHttp请求工具类

好的，下面是一个简单的用Java实现的OkHttp请求工具类。

import okhttp3.*;

import java.io.IOException;
import java.util.Map;

public class OkHttpUtil {
    private static OkHttpClient client = new OkHttpClient();

    /**
     * 同步GET请求
     * @param url 请求的URL
     * @param headers 请求头
     * @return 响应结果
     * @throws IOException
     */
    public static String get(String url, Map<String, String> headers) throws IOException {
        Request.Builder builder = new Request.Builder().url(url);
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.entrySet()) {
                builder.addHeader(entry.getKey(), entry.getValue());
            }
        }
        Request request = builder.build();
        Response response = client.newCall(request).execute();
        if (response.isSuccessful()) {
            return response.body().string();
        } else {
            throw new IOException("Unexpected code " + response);
        }
    }

    /**
     * 异步GET请求
     * @param url 请求的URL
     * @param headers 请求头
     * @param callback 响应回调
     */
    public static void getAsync(String url, Map<String, String> headers, Callback callback) {
        Request.Builder builder = new Request.Builder().url(url);
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.entrySet()) {
                builder.addHeader(entry.getKey(), entry.getValue());
            }
        }
        Request request = builder.build();
        client.newCall(request).enqueue(callback);
    }

    /**
     * 同步POST请求
     * @param url 请求的URL
     * @param headers 请求头
     * @param requestBody 请求体
     * @return 响应结果
     * @throws IOException
     */
    public static String post(String url, Map<String, String> headers, RequestBody requestBody) throws IOException {
        Request.Builder builder = new Request.Builder().url(url);
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.entrySet()) {
                builder.addHeader(entry.getKey(), entry.getValue());
            }
        }
        Request request = builder.post(requestBody).build();
        Response response = client.newCall(request).execute();
        if (response.isSuccessful()) {
            return response.body().string();
        } else {
            throw new IOException("Unexpected code " + response);
        }
    }

    /**
     * 异步POST请求
     * @param url 请求的URL
     * @param headers 请求头
     * @param requestBody 请求体
     * @param callback 响应回调
     */
    public static void postAsync(String url, Map<String, String> headers, RequestBody requestBody, Callback callback) {
        Request.Builder builder = new Request.Builder().url(url);
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.entrySet()) {
                builder.addHeader(entry.getKey(), entry.getValue());
            }
        }
        Request request = builder.post(requestBody).build();
        client.newCall(request).enqueue(callback);
    }
}

这里提供了四个方法分别可以同步和异步发送GET和POST请求，其中GET请求不需要请求体，而POST请求需要传入RequestBody对象。可以根据需要进行使用。

使用okhttp3写一个http请求工具类

好的，以下是一个简单的使用OkHttp3进行HTTP请求的工具类：

import okhttp3.*;

import java.io.IOException;
import java.util.Map;

public class HttpUtil {

    private static final MediaType JSON = MediaType.get("application/json; charset=utf-8");

    private static OkHttpClient client = new OkHttpClient();

    public static String get(String url) throws IOException {
        Request request = new Request.Builder()
                .url(url)
                .build();

        try (Response response = client.newCall(request).execute()) {
            return response.body().string();
        }
    }

    public static String post(String url, String json) throws IOException {
        RequestBody body = RequestBody.create(JSON, json);
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .build();
        try (Response response = client.newCall(request).execute()) {
            return response.body().string();
        }
    }

    public static String get(String url, Map<String, String> headers) throws IOException {
        Request.Builder builder = new Request.Builder()
                .url(url);

        for (Map.Entry<String, String> entry : headers.entrySet()) {
            builder.addHeader(entry.getKey(), entry.getValue());
        }

        Request request = builder.build();

        try (Response response = client.newCall(request).execute()) {
            return response.body().string();
        }
    }

    public static String post(String url, String json, Map<String, String> headers) throws IOException {
        RequestBody body = RequestBody.create(JSON, json);

        Request.Builder builder = new Request.Builder()
                .url(url)
                .post(body);

        for (Map.Entry<String, String> entry : headers.entrySet()) {
            builder.addHeader(entry.getKey(), entry.getValue());
        }

        Request request = builder.build();

        try (Response response = client.newCall(request).execute()) {
            return response.body().string();
        }
    }
}

这个工具类包含了四个方法：get，post，getWithHeaders和postWithHeaders。它们可以用于发送HTTP请求并返回响应。

注意：在实际使用中，我们应该根据实际情况调整OkHttpClient的配置。例如，可以设置连接超时时间、读取超时时间、写入超时时间等。