Android基于OkHttp实现文件上传功能

implementation 'com.squareup.okhttp3:okhttp:3.10.0'
implementation 'com.squareup.okio:okio:1.12.0'

package com.example.clientapplication.utils;
 
import java.io.File;
import java.io.IOException;
import java.util.UUID;
 
import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;
 
public class UploadUtil {
    private OkHttpClient okHttpClient;
    private UploadUtil(){
        okHttpClient = new OkHttpClient();
    }
    /**
     * 使用静态内部类的方式实现单例模式
     */
    private static class UploadUtilInstance{
        private static final UploadUtil INSTANCE = new UploadUtil();
    }
    public static UploadUtil getInstance(){
        return UploadUtilInstance.INSTANCE;
    }
 
    /**
     * @param url   服务器地址
     * @param file  所要上传的文件
     * @return      响应结果
     * @throws IOException
     */
    public ResponseBody upload(String url, File file) throws IOException {
        OkHttpClient client = new OkHttpClient();
        RequestBody requestBody = new MultipartBody.Builder()
                .setType(MultipartBody.FORM)
                .addFormDataPart("file", file.getName(),
                        RequestBody.create(MediaType.parse("multipart/form-data"), file))
                .build();
        Request request = new Request.Builder()
                .header("Authorization", "ClientID" + UUID.randomUUID())
                .url(url)
                .post(requestBody)
                .build();
        Response response = client.newCall(request).execute();
        if (!response.isSuccessful())
            throw new IOException("Unexpected code " + response);
        return response.body();
    }
}

/**
     * 创建线程实现文件的上传
     * @param view
     */
    public void upload(View view){
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    UploadUtil.getInstance().upload(path,file);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }