okhttp上传MultipartFile

要使用OkHttp上传MultipartFile，你需要引入OkHttp库并编写相应的代码。首先，你需要在你的项目中引入OkHttp库。根据你的版本选择相关的依赖配置。如果你使用的是OkHttp3，你可以在你的pom.xml或build.gradle文件中添加如下依赖配置：

<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>4.0.0</version>
</dependency>

或者如果你使用的是OkHttp2，你可以添加如下依赖配置：

<!-- okhttp -->
<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>3.14.9</version>
</dependency>

然后，你可以使用以下代码来进行文件上传：

import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

import java.io.File;
import java.io.IOException;

public static String uploadFile(String url, String key, File file) {
    OkHttpClient client = new OkHttpClient();

    RequestBody requestBody = new MultipartBody.Builder()
            .setType(MultipartBody.FORM)
            .addFormDataPart(key, file.getName(),
                    RequestBody.create(MediaType.parse("multipart/form-data"), file))
            .build();

    Request request = new Request.Builder()
            .url(url)
            .post(requestBody)
            .build();

    try (Response response = client.newCall(request).execute()) {
        if (response.isSuccessful() && response.body() != null) {
            return response.body().string();
        }
    } catch (IOException e) {
        // TODO: handle exception
    }

    return null;
}

以上代码中，你需要提供上传的文件路径、URL和请求参数名称。这个方法将会返回上传结果的响应字符串。请确保在使用这段代码之前，你已经导入了正确的OkHttp库，并根据你的需求进行相应的修改和调整。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *3* [okhttp传输文件类型的参数](https://blog.csdn.net/skh2015java/article/details/121704772)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *2* [SpringBoot2.1.x，okhttp3网络请求之MultipartFile方式上传文件，multipart/form-data表单多文件+多参数](https://blog.csdn.net/p812438109/article/details/107943319)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
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