本类可以实现在安卓开发中在一个表单中同时提交参数、数据和上传多个文件，并可以自行制定字段名称。直接上代码：

package com.example.myuploadtest.utils;

import java.io.BufferedReader;

import java.io.DataOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import java.util.List;

import java.util.Map;

import java.util.UUID;

import com.example.myuploadtest.Log;//这行可以删了替换为系统自带的

public class HttpConnectionUtil {

private static final String TAG = HttpConnectionUtil.class.getSimpleName();

private static final int TIME_OUT = 10*10000000; //超时时间

private static final String CHARSET = "utf-8"; //设置编码

private static final String PREFIX = "--"; //前缀

private static final String LINE_END = "\r\n"; //换行

private static final String BOUNDARY = UUID.randomUUID().toString(); //边界标识 随机生成

private static final String CONTENT_TYPE = "multipart/form-data"; //内容类型

public static void postRequest(String strUrl, Map strParams, Map fileParams, FileUploadListener listener){

String strResult = null;

HttpURLConnection conn = null;

try {

URL url = new URL(strUrl);

conn = (HttpURLConnection) url.openConnection();

conn.setRequestMethod("POST"); //请求方式

conn.setReadTimeout(TIME_OUT);

conn.setConnectTimeout(TIME_OUT);

conn.setDoInput(true); //允许输入流

conn.setDoOutput(true); //允许输出流

conn.setUseCaches(false); //Post 请求不能使用缓存

//设置请求头参数

conn.setRequestProperty("Charset", CHARSET);//设置编码

conn.setRequestProperty("connection", "keep-alive");

conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);

//请求体

//提交参数

DataOutputStream dos = new DataOutputStream(conn.getOutputStream());

dos.writeBytes( getStrParams(strParams).toString() );

dos.flush();

//当文件不为空，把文件包装并且上传

if(fileParams.size() > 0) {

//文件上传

postFileParams(dos, fileParams, listener);

}

//请求结束标志

dos.writeBytes(PREFIX + BOUNDARY + PREFIX + LINE_END);

dos.flush();

dos.close();

Log.i(TAG, "postResponseCode() = "+conn.getResponseCode() );

//获取服务器响应码 200=成功, 当服务器响应成功，获取服务器响应的流

if (conn.getResponseCode() == 200) {

InputStream in = conn.getInputStream();

BufferedReader reader = new BufferedReader(new InputStreamReader(in));

String line = null;

StringBuilder response = new StringBuilder();

while ((line = reader.readLine()) != null) {

response.append(line);

}

Log.i(TAG, "run: " + response);

strResult = response.toString();

}

else{

Log.i(TAG, "postResponseCode() = "+conn.getResponseCode() );

strResult = null;

}

listener.onFinish(conn.getResponseCode(), strResult, conn.getHeaderFields());

} catch (MalformedURLException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}finally {

if (conn!=null){

conn.disconnect();

}

}

//return strResult;

}

public interface FileUploadListener{

public void onProgress(long pro, double precent);

public void onFinish(int code, String res, Map> headers);

}

/**

* 对post参数进行拼接编码处理，返回拼接后的结果

*/

private static StringBuilder getStrParams(Map strParams){

StringBuilder strSb = new StringBuilder();

for (Map.Entry entry : strParams.entrySet() ){

strSb.append(PREFIX)

.append(BOUNDARY)

.append(LINE_END)

.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINE_END)

.append("Content-Type: text/plain; charset=" + CHARSET + LINE_END)

.append("Content-Transfer-Encoding: 8bit" + LINE_END)

.append(LINE_END)// 参数头设置完以后需要两个换行，然后才是参数内容

.append(entry.getValue())

.append(LINE_END);

}

return strSb;

}

/**

* 对post文件进行拼接编码处理，直接上传

*/

private static void postFileParams(DataOutputStream dos, Map fileParams, FileUploadListener listener){

StringBuilder fileSb = new StringBuilder();

for (Map.Entry fileEntry: fileParams.entrySet()){

//写入文件参数

fileSb.append(PREFIX)

.append(BOUNDARY)

.append(LINE_END)

/**

* 这里重点注意： name里面的值为服务端需要的key 只有这个key 才可以得到对应的文件

* filename是文件的名字，包含后缀名的 比如:abc.png

*/

.append("Content-Disposition: form-data; name=\""+ fileEntry.getKey() + "\"; filename=\"" + fileEntry.getValue().getName() + "\"" + LINE_END)

.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINE_END) //此处的ContentType不同于 请求头 中Content-Type

.append("Content-Transfer-Encoding: 8bit" + LINE_END)

.append(LINE_END);// 参数头设置完以后需要两个换行，然后才是参数内容

//写入文件数据

try {

dos.writeBytes(fileSb.toString());

dos.flush();

InputStream is = new FileInputStream(fileEntry.getValue());

byte[] buffer = new byte[1024];

long totalbytes = fileEntry.getValue().length();

long curbytes = 0;

Log.i("cky","total="+totalbytes);

int len = 0;

while ((len = is.read(buffer)) != -1){

dos.write(buffer,0,len);

curbytes += len;

listener.onProgress(curbytes, 1.0d*curbytes/totalbytes);

}

is.close();

dos.writeBytes(LINE_END);

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

使用方式如下：

final String strUrl = "http://127.0.0.1/post/";

final HashMap strParams = new HashMap();

strParams.put("action", "uploadByAJAX");

strParams.put("imei", "A00123");

final HashMap fileParams = new HashMap();

fileParams.put("file", new File(picturePath));

//fileParams.put("file", new File(selectedImage.toString()));

new Thread(){

@Override

public void run() {

HttpConnectionUtil.postRequest(strUrl, strParams, fileParams, new FileUploadListener() {

@Override

public void onProgress(long pro, double precent) {

Log.i("cky", precent+"");

}

@Override

public void onFinish(int code, String res, Map> headers) {

Log.i("cky", res);

}

});

}

}.start();

主要参考了如下链接：