java byte [], and each converting base64

 

1. a way

import java.io.UnsupportedEncodingException;
import java.util.Base64;
// byte[]转base64
String base64Str = Base64.getEncoder().encodeToString(byteArray);
// base64转byte[]
byte[] byteArray = Base64.getDecoder().decode(base64Str);

　　Note: Use jdk own Base64.java class implementation, but jdk version must be> = 1.8.　　　　　　 

2. Second way

import java.io.UnsupportedEncodingException;
import javax.xml.bind.DatatypeConverter;
// byte[]转base64
String base64Str = DatatypeConverter.printBase64Binary(byteArray);
// base64转byte[]
byte[] byteArray = DatatypeConverter.parseBase64Binary(base64Str);

　　Note: Use jdk own DatatypeConverter.java class implementation, but jdk version must be> = 1.6.

3. Three ways

import java.io.UnsupportedEncodingException;
import org.apache.commons.codec.binary.Base64;
// byte[]转base64
String base64Str =Base64.encodeBase64String(byteArray).replaceAll("\r\n", "");
// base64转byte[]
byte[] byteArray = Base64.decodeBase64(base64Str);

　　Required jar package: commons-codec.jar

4. Comparison of Efficiency

　　Fast -> Slow: Second way> a way> Three ways

　　Thus, if the project using a jdk1.8, the best choice is the second approach; JDK1.6, the best choice is a way.

 

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