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我有一个字符串longblobimage,这是取自mysql数据库如何将其转换为base64字符串,以及如何知道它是否已编码的图像?如何在Android中将图像LONGBLOB从数据库转换为base64编码的字符串?
这里是我的尝试:
public String checkForEncode(String string) {
String regex = "^([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{4}|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)$";
if(string.matches(regex)){
System.out.println("ERROR33:it's a Base64");
return string;
}
String encodedImage = Base64.encodeToString(string.getBytes(), Base64.DEFAULT);
return encodedImage;
}
到目前为止,这并不工作,我由于某种原因
什么不适合它?你是否收到错误,以后没有显示图像等? – user681574
我发现java的base64编码的字符串以“/ 9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB”开头,而在PHP方面它的不同,我想我会编码图像,如果它不是在base64 –