Java 如何避免 Base 64 的警告？
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how to avoid warning for the Base 64?
提问by ambrosia1993
I have just tried a sample code form net it shows a warning as follows
我刚刚尝试了一个示例代码表单 net 它显示如下警告
SimpleConvertImage.java:7: warning:com.sun.org.apache.xerces.internal.impl.dv.util.Base64 is internal proprietary API and may be removed in a future release import com.sun.org.apache.xerces.internal.impl.dv.util.Base64; ^
SimpleConvertImage.java:16: warning: com.sun.org.apache.xerces.internal.impl.dv.util. Base64 is internal proprietary API and may be removed in a future release String base64String=Base64.encode(baos.toByteArray()); ^
SimpleConvertImage.java:19: warning: com.sun.org.apache.xerces.internal.impl.dv.util .Base64 is internal proprietary API and may be removed in a future release byte[] bytearray =Base64.decode(base64String); ^
SimpleConvertImage.java:7: warning:com.sun.org.apache.xerces.internal.impl.dv.util.Base64 是内部专有 API，可能会在未来的版本导入 com.sun.org.apache.xerces 中删除。 internal.impl.dv.util.Base64; ^
SimpleConvertImage.java:16：警告：com.sun.org.apache.xerces.internal.impl.dv.util。Base64 是内部专有 API，可能会在未来版本中删除 String base64String=Base64.encode(baos.toByteArray()); ^
SimpleConvertImage.java:19: 警告: com.sun.org.apache.xerces.internal.impl.dv.util .Base64 是内部专有 API，可能会在未来版本中删除 byte[] bytearray =Base64.decode(base64String) ; ^
the code is the below one
代码是下面的
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
public class SimpleConvertImage {
public static void main(String[] args) throws IOException{
String dirName="/root/Desktop";
ByteArrayOutputStream baos=new ByteArrayOutputStream(1000);
BufferedImage img=ImageIO.read(new File(dirName,"Screenshot.png"));
ImageIO.write(img, "png", baos);
baos.flush();
String base64String=Base64.encode(baos.toByteArray());
baos.close();
byte[] bytearray =Base64.decode(base64String);
BufferedImage imag=ImageIO.read(new ByteArrayInputStream(bytearray));
ImageIO.write(imag, "png", new File(dirName,"snap3.png"));
}
}
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
public class SimpleConvertImage {
public static void main(String[] args) throws IOException{
String dirName="/root/Desktop";
ByteArrayOutputStream baos=new ByteArrayOutputStream(1000);
BufferedImage img=ImageIO.read(new File(dirName,"Screenshot.png"));
ImageIO.write(img, "png", baos);
baos.flush();
String base64String=Base64.encode(baos.toByteArray());
baos.close();
byte[] bytearray =Base64.decode(base64String);
BufferedImage imag=ImageIO.read(new ByteArrayInputStream(bytearray));
ImageIO.write(imag, "png", new File(dirName,"snap3.png"));
}
}
采纳答案by mikea
Don't use internal com.sun.* packages. If you are on v6 or greater you can use DatatypeConverter. Your code would look like:
不要使用内部的 com.sun.* 包。如果您使用的是 v6 或更高版本，则可以使用DatatypeConverter。您的代码如下所示：
String base64String = DatatypeConverter.printBase64Binary(baos.toByteArray());
byte[] bytearray = DatatypeConverter.parseBase64Binary(base64String);
回答by Mayank
You can also use: java.util.Base64 Added to Java 1.8
您也可以使用：java.util.Base64 添加到 Java 1.8
String encryptedValue = new String(Base64.getEncoder().encode(bytesToEncode));
byte[] decodedValue = Base64.getDecoder().decode(encryptedDataString);
