android 上传文件有几种方法,基于标准http实现Android多文件上传

实现多文件的上传，基于标准的http来实现。

1.多文件上传MyUploader类的实现：

/**

*

* 同步上传多个文件

* 基于标准的http实现，需要在非UI线程中调用，以免阻塞UI。

*

*/

public class MyUploader {

private static final String TAG = "MyUploader";

// 同步上传多个文件/

/**

* 同步上传File

*

* @param Url

* @param fullFileName

* : 全路径，ex. /sdcard/f/yh.jpg

* @param fileName

* : file name, ex. yh.jpg

* @return 服务器的响应结果(字符串形式)

*/

public String MyUploadMultiFileSync(String Url,

List fileList, Map params) {

String reulstCode = "";

String end = "\r\n";

String twoHyphens = "--";

String boundary = "--------boundary";

try {

URL url = new URL(actionUrl);

HttpURLConnection con = (HttpURLConnection) url.openConnection();

// 允许Input、Output，不使用Cache

con.setDoInput(true);

con.setDoOutput(true);

con.setUseCaches(false);

// 设置传送的method=POST

con.setRequestMethod("POST");

// setRequestProperty

con.setRequestProperty("Connection", "Keep-Alive");

con.setRequestProperty("Charset", "UTF-8");

// con.setRequestProperty("Content-Type",

// "application/x-www-form-urlencoded");

con.setRequestProperty("Content-Type",

"multipart/form-data;boundary=" + boundary);

StringBuffer s = new StringBuffer();

// 设置DataOutputStream

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

for (int i = 0; i < fileList.size(); i++) {

String filePath = fileList.get(i);

int endFileIndex = filePath.lastIndexOf("/");

String fileName = filePath.substring(endFileIndex + 1);

Log.i(TAG, "filename= " + fileName);

// set 头部

StringBuilder sb = new StringBuilder();

sb.append(twoHyphens);

sb.append(boundary);

sb.append(end);

sb.append("Content-Disposition: form-data; ");

sb.append("name=" + "\"" + "upload_file" +i + "\"");

sb.append(";filename=");

sb.append("\"" + fileName + "\"");

sb.append(end);

sb.append("Content-Type: ");

sb.append("image/jpeg");

sb.append(end);

sb.append(end);

// 1. write sb

dos.writeBytes(sb.toString());

// 取得文件的FileInputStream

FileInputStream fis = new FileInputStream(filePath);

// 设置每次写入1024bytes

int bufferSize = 1024;

byte[] buffer = new byte[bufferSize];

int length = -1;

// 从文件读取数据至缓冲区

while ((length = fis.read(buffer)) != -1) {

dos.write(buffer, 0, length);

}

dos.writeBytes(end);

fis.close();

dos.writeBytes(end);

dos.writeBytes(end);

//dos.writeBytes(end);

//dos.flush();

// close streams

//fis.close();

}

// set 尾部

StringBuilder sb2 = new StringBuilder();

if (params != null && !params.isEmpty()) {

for (String key : params.keySet()) {

String value = params.get(key);

sb2.append(twoHyphens);

sb2.append(boundary);

sb2.append(end);

sb2.append("Content-Disposition: form-data; ");

sb2.append("name=" + "\"");

sb2.append(key + "\"");

sb2.append(end);

sb2.append(end);

sb2.append(value);

sb2.append(end);

}

}

sb2.append(twoHyphens + boundary + end);

dos.writeBytes(sb2.toString());

dos.flush();

Log.i(TAG, "sb2:" + sb2.toString());

// 取得Response内容

InputStream is = con.getInputStream();

int ch;

StringBuffer b = new StringBuffer();

while ((ch = is.read()) != -1) {

b.append((char) ch);

}

reulstCode = b.toString().trim();

// 关闭

dos.close();

} catch (IOException e) {

Log.i(TAG, "IOException: " + e);

e.printStackTrace();

}

return reulstCode;

}

}

2. 调用方法：

由于MyUploader的MyUploadMultiFileSync本身是同步的函数请求，所以，这个函数需要在非UI线程中执行。本例采用Thread+Handler的方式来进行说明。

下面是activity的主要代码,功能是将cache目录中的的jpg文件上传到指定的服务器：

public void uploadThreadTest() {

new Thread(new Runnable() {

@Override

public void run() {

try {

upload();

} catch (Exception e) {

e.printStackTrace();

}

}

}).start();

}

private void upload() {

String url = "https://httpbin.org/post";

List fileList = getCacheFiles();

if (fileList == null) {

myHandler.sendEmptyMessage(-1);

}else {

MyUploader myUpload = new MyUploader();

//同步请求，直接返回结果，根据结果来判断是否成功。

String reulstCode = myUpload.MyUploadMultiFileSync(url, fileList, null);

Log.i(TAG, "upload reulstCode: " + reulstCode);

myHandler.sendEmptyMessage(0);

}

}

private List getCacheFiles() {

List fileList = new ArrayList();

File catchPath = mContext.getCacheDir();

if (catchPath!=null && catchPath.isDirectory()) {

File[] files = catchPath.listFiles();

if (files == null || files.length<1) {

return null;

}

for (int i = 0; i < files.length; i++) {

if (files[i].isFile() && files[i].getAbsolutePath().endsWith(".jpg")) {

fileList.add(files[i].getAbsolutePath());

}

}

return fileList;

}

return null;

}

handler/

private Handler myHandler = new Handler() {

@Override

public void handleMessage(Message msg) {

Log.i(TAG,"handleMessage msg===" + msg);

if (msg.what == -1) {

Toast.makeText(mContext, "not find file!", Toast.LENGTH_LONG).show();

return;

}else {

Toast.makeText(mContext, "upload success!", Toast.LENGTH_LONG).show();

}

}

};

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。