【发布时间】：2015-06-29 07:53:39
【问题描述】：
我目前有代码使用 URLEncoder 形成我发送到 api 的数据字符串。
它的 url 编码网络上的图像。
我想更改它，以便它在我的桌面上对图像进行 url 编码。
请问我该怎么做？我需要使用不同的语法，还是需要解析桌面上的路径以便 URLEncoder 可以读取？
代码如下。感谢阅读
url = new URL("https://api.imgur.com/3/image");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
String data = URLEncoder.encode("image", "UTF-8") + "="
//what i want but doesnt work
+ URLEncoder.encode("C:\\Users\\J\\Desktop\\test5.jpg", "UTF-8");
// what works but i dont want
+ URLEncoder.encode("http://i.imgur.com/FB9OZWQ.jpg", "UTF-8");
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Authorization", "Client-ID " + clientID);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
conn.connect();
StringBuilder stb = new StringBuilder();
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(data);
全班
public class UploadController {
public static String getImgurContent(String clientID) throws Exception {
// clientID = "b290a88ad882073";
URL url;
url = new URL("https://api.imgur.com/3/image");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
String data = URLEncoder.encode("image", "UTF-8") + "="
//what i want but doesnt work
+ URLEncoder.encode("C:\\Users\\J\\Desktop\\test5.jpg", "UTF-8");
// what works but i dont want
+ URLEncoder.encode("http://i.imgur.com/FB9OZWQ.jpg", "UTF-8");
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Authorization", "Client-ID " + clientID);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
conn.connect();
StringBuilder stb = new StringBuilder();
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(data);
wr.flush();
// Get the response
BufferedReader rd = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
stb.append(line).append("\n");
}
wr.close();
rd.close();
System.out.println(stb.toString());
return stb.toString();
}
}
感谢好心的回答者，我已将我的代码更新为以下内容。但是，我仍然得到 404。 base64 是这样的
_9j_4AAQSkZJRgABAQEASABIAAD_2wBDAAYEBQ
Imgur api 应该接受它https://api.imgur.com/endpoints/image 我认为
代码在这里：
public class UploadController {
public static String getImgurContent(String clientID) throws Exception {
// clientID = "b290a88ad882073";
URL url;
url = new URL("https://api.imgur.com/3/image");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
String file1 = "C:\\Users\\J\\Desktop\\test5.jpg";
// convert to base64
FileInputStream imageInFile = new FileInputStream(file1);
byte imageData[] = new byte[(int) file1.length()];
imageInFile.read(imageData);
String convertedImageData = Base64.encodeBase64URLSafeString(imageData);
System.out.println(convertedImageData);
// String data = "image/png" + "base64" + "=" + convertedImageData;
// sample data string
// data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==
// String data = URLEncoder.encode("image", "UTF-8") + "="
//what i want but doesnt work
// + URLEncoder.encode("C:\\Users\\J\\Desktop\\test5.jpg", "UTF-8");
// what works but i dont want
// + URLEncoder.encode("http://i.imgur.com/FB9OZWQ.jpg", "UTF-8");
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Authorization", "Client-ID " + clientID);
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
conn.connect();
StringBuilder stb = new StringBuilder();
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(convertedImageData);
wr.flush();
// Get the response
BufferedReader rd = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
stb.append(line).append("\n");
}
wr.close();
rd.close();
System.out.println(stb.toString());
return stb.toString();
}
返回信息：
Building g5 1.0-SNAPSHOT
------------------------------------------------------------------------
--- exec-maven-plugin:1.2.1:exec (default-cli) @ g5 ---
_9j_4AAQSkZJRgABAQEASABIAAD_2wBDAAYEBQ
Exception in thread "main" java.io.IOException: Server returned HTTP response code: 400 for URL: https://api.imgur.com/3/image
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1839)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1440)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
at main.UploadController.getImgurContent(UploadController.java:80)
at main.ImgurMainTest1.main(ImgurMainTest1.java:16)
------------------------------------------------------------------------
BUILD FAILURE
------------------------------------------------------------------------
Total time: 2.003s
Finished at: Wed Apr 22 01:17:49 BST 2015
Final Memory: 5M/109M
------------------------------------------------------------------------
Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:exec (default-cli) on project g5: Command execution failed. Process exited with an error: 1 (Exit value: 1) -> [Help 1]
To see the full stack trace of the errors, re-run Maven with the -e switch.
Re-run Maven using the -X switch to enable full debug logging.
For more information about the errors and possible solutions, please read the following articles:
[Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
【问题讨论】：
-
为什么？您不需要 URLEncode 文件名。您也不需要对 URL 进行 URLEncode。您要解决的真正问题是什么？
-
我正在使用（其他人的代码）将图像上传到 Imgur API。它按原样工作，但我想修改它以在我的桌面上上传图像，而不是在 url 上上传图像。您在上面看到的基本上是全部内容，但我将在整个课程中进行编辑
-
有效的代码不会上传图片，它只是发送一个已经在互联网上的图片的 URL。
-
您没有对图像进行 URL 编码。您正在对其 URL 进行 URLEncoding。并发送。以任何形式将本地文件名发送到另一台主机都行不通。其他主机看不到您的文件。你的问题没有意义。
-
不清楚你在问什么。你已经完全改变了问题。它现在根本不再是关于 URLEncoding 的了。我建议你删除它并重新开始。