OkHttp工具类

<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>4.10.0</version>
</dependency>

<!-- 如果需要解析JSON响应，可以添加Gson库 -->
<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.9</version>
</dependency>

import com.google.gson.Gson;
import okhttp3.*;

import java.io.IOException;
import java.lang.reflect.Type;
import java.util.Map;

public class OkHttpUtil {

    private static final OkHttpClient client = new OkHttpClient();
    private static final Gson gson = new Gson();

    // 发送GET请求并返回指定类型对象
    public static <T> T sendGet(String url, Map<String, String> headers, Class<T> clazz,Type type) throws IOException {
        Request.Builder requestBuilder = new Request.Builder().url(url);

        // 添加请求头
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.entrySet()) {
                requestBuilder.addHeader(entry.getKey(), entry.getValue());
            }
        }

        Request request = requestBuilder.build();

        try (Response response = client.newCall(request).execute()) {
            if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

            String responseBody = response.body().string();
            if(type!=null){
                return gson.fromJson(responseBody, type);
            }
            return gson.fromJson(responseBody, clazz);
        }
    }


    // 发送POST请求并返回指定类型对象（带JSON请求体）
    public static <T> T sendPostJson(String url, Object requestBodyObject, Map<String, String> headers, Class<T> clazz,Type type) throws IOException {
        String jsonInputString = gson.toJson(requestBodyObject);  // 将对象转换为JSON字符串
        MediaType JSON = MediaType.get("application/json; charset=utf-8");
        RequestBody body = RequestBody.create(jsonInputString, JSON);

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

        // 添加请求头
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.entrySet()) {
                requestBuilder.addHeader(entry.getKey(), entry.getValue());
            }
        }

        Request request = requestBuilder.build();

        try (Response response = client.newCall(request).execute()) {
            if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

            String responseBody = response.body().string();

            if(type!=null){
                return gson.fromJson(responseBody, type);
            }
            return gson.fromJson(responseBody, clazz);
        }
    }

    public static void main(String[] args) {
        // 示例：发送GET请求并返回对象
//            String getUrl = "http://example.com/api/resource";
//            Map<String, String> getHeaders = Map.of(
//                    "Authorization", "Bearer your_token_here",
//                    "Accept", "application/json"
//            );
//            MyResponse myGetResponse = sendGet(getUrl, getHeaders, MyResponse.class);
//            System.out.println(myGetResponse);
//
//            // 示例：发送POST请求并返回对象（带JSON请求体）
//            String postUrl = "http://example.com/api/resource";
//            MyRequest myRequest = new MyRequest("John", 30);
//            Map<String, String> postHeaders = Map.of(
//                    "Authorization", "Bearer your_token_here",
//                    "Content-Type", "application/json"
//            );
//            MyResponse myPostResponse = sendPostJson(postUrl, myRequest, postHeaders, MyResponse.class);
//            System.out.println(myPostResponse);

    }

}

<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>4.10.0</version>
</dependency>

<!-- 如果需要解析JSON响应，可以添加Gson库 -->
<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.9</version>
</dependency>

import com.google.gson.Gson;
import okhttp3.*;

import java.io.IOException;
import java.lang.reflect.Type;
import java.util.Map;

public class OkHttpUtil {

    private static final OkHttpClient client = new OkHttpClient();
    private static final Gson gson = new Gson();

    // 发送GET请求并返回指定类型对象
    public static <T> T sendGet(String url, Map<String, String> headers, Class<T> clazz,Type type) throws IOException {
        Request.Builder requestBuilder = new Request.Builder().url(url);

        // 添加请求头
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.entrySet()) {
                requestBuilder.addHeader(entry.getKey(), entry.getValue());
            }
        }

        Request request = requestBuilder.build();

        try (Response response = client.newCall(request).execute()) {
            if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

            String responseBody = response.body().string();
            if(type!=null){
                return gson.fromJson(responseBody, type);
            }
            return gson.fromJson(responseBody, clazz);
        }
    }


    // 发送POST请求并返回指定类型对象（带JSON请求体）
    public static <T> T sendPostJson(String url, Object requestBodyObject, Map<String, String> headers, Class<T> clazz,Type type) throws IOException {
        String jsonInputString = gson.toJson(requestBodyObject);  // 将对象转换为JSON字符串
        MediaType JSON = MediaType.get("application/json; charset=utf-8");
        RequestBody body = RequestBody.create(jsonInputString, JSON);

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

        // 添加请求头
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.entrySet()) {
                requestBuilder.addHeader(entry.getKey(), entry.getValue());
            }
        }

        Request request = requestBuilder.build();

        try (Response response = client.newCall(request).execute()) {
            if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

            String responseBody = response.body().string();

            if(type!=null){
                return gson.fromJson(responseBody, type);
            }
            return gson.fromJson(responseBody, clazz);
        }
    }

    public static void main(String[] args) {
        // 示例：发送GET请求并返回对象
//            String getUrl = "http://example.com/api/resource";
//            Map<String, String> getHeaders = Map.of(
//                    "Authorization", "Bearer your_token_here",
//                    "Accept", "application/json"
//            );
//            MyResponse myGetResponse = sendGet(getUrl, getHeaders, MyResponse.class);
//            System.out.println(myGetResponse);
//
//            // 示例：发送POST请求并返回对象（带JSON请求体）
//            String postUrl = "http://example.com/api/resource";
//            MyRequest myRequest = new MyRequest("John", 30);
//            Map<String, String> postHeaders = Map.of(
//                    "Authorization", "Bearer your_token_here",
//                    "Content-Type", "application/json"
//            );
//            MyResponse myPostResponse = sendPostJson(postUrl, myRequest, postHeaders, MyResponse.class);
//            System.out.println(myPostResponse);

    }

}