Java 将 Base64 转换为十六进制字符串
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Java convert Base64 to Hex String
提问by user3441151
I have one Base64 String YxRfXk827kPgkmMUX15PNg==I want to convert it into 63145F5E4F36EE43E09263145F5E4F36
我有一个 Base64 字符串，YxRfXk827kPgkmMUX15PNg==我想将其转换为63145F5E4F36EE43E09263145F5E4F36
So I think scenario would be like this I have to first decode Base64 string and than convert it into Hex
所以我认为场景是这样的，我必须首先解码 Base64 字符串，然后将其转换为十六进制
My code is given below
我的代码如下
import org.apache.commons.codec.binary.Base64;
String guid = "YxRfXk827kPgkmMUX15PNg==";
byte[] decoded = Base64.decodeBase64(guid);
try {
System.out.println(new String(decoded, "UTF-8") + "\n");
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
Above code gives c_^O6?C??c_^O6
上面的代码给出 c_^O6?C??c_^O6
But I don't know How to convert this string into Hex string. So it gives the 63145F5E4F36EE43E09263145F5E4F36output.
但我不知道如何将此字符串转换为十六进制字符串。所以它给出了63145F5E4F36EE43E09263145F5E4F36输出。
So please help me to fix this issue.
所以请帮我解决这个问题。
回答by Shakti Dash
Since you are already using Apache Common Codec:
由于您已经在使用 Apache Common Codec：
String guid = "YxRfXk827kPgkmMUX15PNg==";
byte[] decoded = Base64.decodeBase64(guid);
String hexString = Hex.encodeHexString(decoded);
System.out.println(hexString);
Using standard Java libraries:
使用标准 Java 库：
String guid = "YxRfXk827kPgkmMUX15PNg==";
byte[] decoded = Base64.getDecoder().decode(guid);
System.out.println(String.format("%040x", new BigInteger(1, decoded)));
回答by Hemant Sangle
Hey try this code it gives the expected output
嘿试试这个代码它给出了预期的输出
import java.util.Base64;
/**
*
* @author hemants
*/
public class NewClass5 {
public static void main(String[] args) {
String guid = "YxRfXk827kPgkmMUX15PNg==";
byte[] decoded = Base64.getDecoder().decode(guid);
System.out.println(toHex(decoded));
}
private static final char[] DIGITS
= {'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
public static final String toHex(byte[] data) {
final StringBuffer sb = new StringBuffer(data.length * 2);
for (int i = 0; i < data.length; i++) {
sb.append(DIGITS[(data[i] >>> 4) & 0x0F]);
sb.append(DIGITS[data[i] & 0x0F]);
}
return sb.toString();
}
}
Output
输出
63145F5E4F36EE43E09263145F5E4F36
