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為什么不能使用 httpurlconnection 發布整個 base64 字符串？

Java

幕布斯6054654 2022-07-27 09:46:29

我想將圖像上傳到服務器。我得到了圖像的位圖并將其編碼為base64。我使用 encodeToString 方法將圖像的 base64 轉換為字符串。我使用 httpurlconnection 將字符串發布到 PHP。實際上，我從 PHP 獲得的字符串不是整個字符串。我沒有收到任何錯誤。請給我反饋！public String httpURLConnectionPost(final String urlString){ String result=""; try { URL url = new URL(urlString); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("POST"); connection.setDoOutput(true); connection.setDoInput(true); connection.setUseCaches(false); connection.connect(); Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.download); ByteArrayOutputStream baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos); byte[] imageBytes = baos.toByteArray(); String encodedImage = Base64.encodeToString(imageBytes, Base64.NO_CLOSE); String body= "image="+encodedImage; Log.d("serverPostData","body = " +body); BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(connection.getOutputStream(), "UTF-8")); writer.write(body); writer.close(); int responseCode = connection.getResponseCode(); if(responseCode == HttpURLConnection.HTTP_OK){ InputStream inputStream = connection.getInputStream(); StringBuilder stringBuilder = new StringBuilder(); String line; BufferedReader br = new BufferedReader(new InputStreamReader(inputStream)); while ((line = br.readLine()) != null) { stringBuilder .append(line); } result = stringBuilder .toString(); } } catch (Exception e) { e.printStackTrace(); } return result; }

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2 回答

HUH函數

TA貢獻1836條經驗獲得超4個贊

我解決了base64需要將空替換為“+”的問題。

<?php

include("mysqli_connect.php");

$image= $_POST['image'];

$change = str_replace(" ","+",$image);

$a = uniqid() ;

$ImagePath = "good/$a.JPEG";

$ServerURL = "https://172.30.10.1/$ImagePath";

$InsertSQL = "INSERT INTO Photoshop(photo) VALUES('$ServerURL')" ;

if(mysqli_query($connect, $InsertSQL)){

file_put_contents($ImagePath,base64_decode($change ));

echo $image;

}else{

echo "failed";

}

mysqli_close();

反對回復 2022-07-27

牛魔王的故事

TA貢獻1830條經驗獲得超3個贊

試試這個將圖像轉換為base64：

Uri uri = data.getData();

Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), uri);

String encodedImageData = getEncoded64ImageStringFromBitmap(bitmap);

現在在 API 中傳遞數據：

JsonObject data1 = new JsonObject();

data1.addProperty("imageData", "data:image/png;base64," + encodedImageData);

現在設置 ImageBitmap：

image.setImageBitmap(bitmap);

這是方法：

private String getEncoded64ImageStringFromBitmap(Bitmap bitmap) {

ByteArrayOutputStream stream = new ByteArrayOutputStream();

bitmap.compress(Bitmap.CompressFormat.JPEG, 70, stream);

byte[] byteFormat = stream.toByteArray();

// get the base 64 string

String imgString = Base64.encodeToString(byteFormat, Base64.NO_WRAP);

return imgString;

}

對于 HttpUrlConnection 試試這個......

jsonObject = new JSONObject();

jsonObject.put("imageString", encodedImage);

String data = jsonObject.toString();

String yourURL = "yourphpfileurl";

URL url = new URL(yourURL);

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

connection.setDoOutput(true);

connection.setDoInput(true);

connection.setRequestMethod("POST");

connection.setFixedLengthStreamingMode(data.getBytes().length);

connection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");

OutputStream out = new BufferedOutputStream(connection.getOutputStream());

BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, "UTF-8"));

writer.write(data);

writer.flush();

writer.close();

out.close();

connection.connect();

InputStream in = new BufferedInputStream(connection.getInputStream());

BufferedReader reader = new BufferedReader(new InputStreamReader(

in, "UTF-8"));

StringBuilder sb = new StringBuilder();

String line = null;

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

sb.append(line);

}

in.close();

String result = sb.toString();

connection.disconnect();

希望這個對你有用...

反對回復 2022-07-27

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為什么不能使用 httpurlconnection 發布整個 base64 字符串？

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為什么不能使用 httpurlconnection 發布整個 base64 字符串？

為什么不能使用 httpurlconnection 發布整個 base64 字符串？