本文主要是介绍使用 Java 将图片转换成 Base64 格式的编码。
public static String getBase64(File src) {
String base64String = "";
try (FileInputStream fis = new FileInputStream(src)) {
byte[] buffer = new byte[(int) src.length()];
int offset = 0;
int numRead = 0;
while (offset < buffer.length & (numRead = fis.read(buffer, offset, buffer.length - offset)) >= 0) {
offset += numRead;
}
if (offset != buffer.length) {
throw new IOException("Could not completely read file "
+ src.getName());
}
BASE64Encoder encoder = new BASE64Encoder();
base64String = encoder.encode(buffer);
} catch (Exception e) {
e.printStackTrace();
}
return "data:image/jpeg;base64," + base64String;
}