使用Volley自定义正文post请求上传文件

// 导入所需的类
import com.android.volley.AuthFailureError;
import com.android.volley.NetworkResponse;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyLog;
import com.android.volley.toolbox.HttpHeaderParser;
import com.android.volley.toolbox.StringRequest;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;

// 创建自定义的文件上传请求类
public class FileUploadRequest extends Request<String> {
    private static final String FILE_PART_NAME = "file";
    private static final String FILE_NAME = "example.jpg";
    private static final String FILE_MIME_TYPE = "image/jpeg";

    private final Response.Listener<String> mListener;
    private final File mFile;

    public FileUploadRequest(String url, File file, Response.Listener<String> listener,
                             Response.ErrorListener errorListener) {
        super(Method.POST, url, errorListener);
        mListener = listener;
        mFile = file;
    }

    @Override
    public String getBodyContentType() {
        return "multipart/form-data; boundary=" + BOUNDARY;
    }

    @Override
    public byte[] getBody() throws AuthFailureError {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        try {
            // 添加文件部分
            bos.write(("--" + BOUNDARY + "\r\n").getBytes());
            bos.write(("Content-Disposition: form-data; name=\"" + FILE_PART_NAME +
                    "\"; filename=\"" + FILE_NAME + "\"\r\n").getBytes());
            bos.write(("Content-Type: " + FILE_MIME_TYPE + "\r\n\r\n").getBytes());
            bos.write(FileUtils.readFileToByteArray(mFile)); // 使用FileUtils类读取文件内容
            bos.write("\r\n".getBytes());

            // 添加其他参数部分
            // bos.write(("--" + BOUNDARY + "\r\n").getBytes());
            // bos.write(("Content-Disposition: form-data; name=\"param1\"\r\n\r\n").getBytes());
            // bos.write("value1\r\n".getBytes());
            // bos.write(("--" + BOUNDARY + "--\r\n").getBytes());

            bos.write(("--" + BOUNDARY + "--\r\n").getBytes());
            return bos.toByteArray();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected Response<String> parseNetworkResponse(NetworkResponse response) {
        try {
            String jsonString = new String(response.data,
                    HttpHeaderParser.parseCharset(response.headers));
            return Response.success(jsonString,
                    HttpHeaderParser.parseCacheHeaders(response));
        } catch (UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        }
    }

    @Override
    protected void deliverResponse(String response) {
        mListener.onResponse(response);
    }
}

// 创建Volley请求队列
RequestQueue requestQueue = Volley.newRequestQueue(context);

// 创建文件上传请求
File file = new File("path/to/file");
String url = "http://example.com/upload";
FileUploadRequest request = new FileUploadRequest(url, file,
        new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                // 文件上传成功的处理逻辑
            }
        },
        new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                // 文件上传失败的处理逻辑
            }
        });

// 将请求添加到请求队列中
requestQueue.add(request);