从 Java 解码 Base64 并发送到浏览器的回车问题
我有一个 Servlet，它已调整图像大小并将图像编码为 Base64。我像这样对其进行编码，
BufferedImage newBuf = .. a bufferedImage...
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(bufferedImage, sImgFormat, baos);
baos.flush();
imageInBytes = baos.toByteArray();
然后将其编码为 base64 以发送到浏览器，如下所示
sun.misc.BASE64Encoder encoder = new BASE64Encoder();
String sEncImage = "data:image/jpg;base64," + encoder.encodeBuffer(imageInBytes);
浏览器将接收编码，并且除了回车符（“\n”）一致嵌入到破坏图像的字符串中之外，它可以正常工作。当我删除回车符时，图像很好。有没有一种方法可以生成不带回车的编码。或者我必须在寄回之前自己过滤掉它？
（我正在使用J2SE 1.4.2并且需要继续这样做）
I have a servlet that has resized and encoded an image into base64. I encode it like this
BufferedImage newBuf = .. a bufferedImage...
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(bufferedImage, sImgFormat, baos);
baos.flush();
imageInBytes = baos.toByteArray();
I then encode this into base64 to send to the browser like this
sun.misc.BASE64Encoder encoder = new BASE64Encoder();
String sEncImage = "data:image/jpg;base64," + encoder.encodeBuffer(imageInBytes);
The browser will receive the encoding and it works except for the carriage returns, ("\n") embedded consistently within the string which corrupts the image. When I remove the carriage returns the image is fine. Is there a way to generate the encoding without the carriage returns. Or must I filter it out myself before sending it back ?
(I am using J2SE 1.4.2 and need to continue to do so)
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我怀疑 sun.misc.Base64encoder 正在对输出进行分块。
我不会使用 sun.misc 类，因为它将您的代码限制为 Oracle JVM（例如，它可以在 IBM Websphere 中工作）。我会使用公共 Base64 编码器或 Base64OutputStream。
I suspect that the sun.misc.Base64encoder is chunking the output.
I wouldn't use sun.misc classes as it restricts your code to Oracle JVMs (for example, it would work in IBM Websphere). I'd use the commons Base64 encoder or Base64OutputStream.