android 图片上传到服务器

1、java后台

public  class MyAsync extends AsyncTask<String,String,String>{

@Override
protected String doInBackground(String... params) {
URL url = null;
try {
url = new URL(params[0]);
Log.e("url",params[0]);
// 发送POST请求必须设置如下两行
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "text/html");
conn.setRequestProperty("Content-Type", "multipart/form-data");
conn.setRequestProperty("Cache-Control", "no-cache");
conn.setRequestProperty("Charsert", "UTF-8");
conn.connect();
conn.setConnectTimeout(10000);
OutputStream out = conn.getOutputStream();

File file = new File(mFileName);

DataInputStream in = new DataInputStream(new FileInputStream(file));
int bytes = 0;
byte[] buffer = new byte[1024];
while ((bytes = in.read(buffer)) != -1) {
out.write(buffer, 0, bytes);
}
in.close();
out.flush();
out.close();
BufferedReader br = new BufferedReader(new InputStreamReader(conn
.getInputStream()));
String line = null;
StringBuffer sb = new StringBuffer();
while ((line = br.readLine()) != null) {
sb.append(line);
}
conn.disconnect();
return sb.toString();
} catch (MalformedURLException e1) {
e1.printStackTrace();
} catch (ProtocolException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
return null;

@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
try {
JSONObject jsonObject = new JSONObject(result);
String message = jsonObject.getString("message");

Toast.makeText(GatherMsgActivity.this,message,Toast.LENGTH_SHORT).show();

} catch (JSONException e) { e.printStackTrace(); } }}

2、php后台

public  class MyAsync extends AsyncTask<String,String,String>{@Overrideprotected String doInBackground(String... params) {

        String end = "\r\n";String twoHyphens = "--";String boundary = "*****";String fileName = "test.jpg";  //报文中的文件名参数try{URL url = new URL(Config.UPIMGURL);HttpURLConnection con = (HttpURLConnection) url.openConnection();/* Output to the connection. Default is false,set to true because post method must write something to the connection */con.setDoOutput(true);/* Read from the connection. Default is true.*/con.setDoInput(true);/* Post cannot use caches */con.setUseCaches(false);/* Set the post method. Default is GET*/con.setRequestMethod("POST");/* 设置请求属性 */con.setRequestProperty("Connection", "Keep-Alive");con.setRequestProperty("Charset", "UTF-8");con.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);/* 设置DataOutputStream，getOutputStream中默认调用connect()*/DataOutputStream ds = new DataOutputStream(con.getOutputStream());  //output to the connectionds.writeBytes(twoHyphens + boundary + end);ds.writeBytes("Content-Disposition: form-data; " + "name=\"file\";filename=\"" + fileName + "\"" + end);ds.writeBytes(end);/* 取得文件的FileInputStream  params[0]为图片保存绝对路径 */Log.e("xxxx",params[0]);FileInputStream fStream = new FileInputStream(params[0]);/* 设置每次写入8192bytes */int bufferSize = 8192;byte[] buffer = new byte[bufferSize];   //8kint length = -1;/* 从文件读取数据至缓冲区 */while ((length = fStream.read(buffer)) != -1){/* 将资料写入DataOutputStream中 */ds.write(buffer, 0, length);}ds.writeBytes(end);ds.writeBytes(twoHyphens + boundary + twoHyphens + end);/* 关闭流，写入的东西自动生成Http正文*/fStream.close();/* 关闭DataOutputStream */ds.close();/* 从返回的输入流读取响应信息 */InputStream is = con.getInputStream();  //input from the connection 正式建立HTTP连接int ch;StringBuffer b = new StringBuffer();while ((ch = is.read()) != -1){b.append((char) ch);}/* 显示网页响应内容 */return b.toString();} catch (Exception e){System.out.println( e.getMessage());}return null;}@Overrideprotected void onPostExecute(String result) {// TODO Auto-generated method stubsuper.onPostExecute(result);try {JSONObject jsonObject = new JSONObject(result);//   String message = jsonObject.getString("message");String res = jsonObject.getString("info");//成功上传一张图片后返回idmImgId = jsonObject.getInt("id");idList.add(mImgId+"");//所有图片都上传成功后if(imgList.size()==idList.size()){if(isUpdate){updateMonitorPoint();}else{submitMonitorPoint();}}//  Toast.makeText(GatherMsgActivity.this,message,Toast.LENGTH_SHORT).show();} catch (JSONException e) {e.printStackTrace();}}}