Question

我正在尝试将base64字符串转换为字节数组，但它会抛出以下错误

java.lang.IllegalArgumentException：Illegal base64 character 3a

我试过以下选项userimage是base64 string

byte[] img1 = org.apache.commons.codec.binary.Base64.decodeBase64(userimage);`

/* byte[] decodedString = Base64.getDecoder().decode(encodedString.getBytes(UTF_8));*/
/* byte[] byteimage =Base64.getDecoder().decode( userimage );*/
/* byte[] byteimage =  Base64.getMimeDecoder().decode(userimage);*/`

Answer 1

您可以使用java.util.Base64包将字符串解码为byte[]。下面是我用于编码和解码的代码。

对于Java 8：

import java.io.UnsupportedEncodingException;
import java.util.Base64;

public class Example {

    public static void main(String[] args) {
        try {
            byte[] name = Base64.getEncoder().encode("hello World".getBytes());
            byte[] decodedString = Base64.getDecoder().decode(new String(name).getBytes("UTF-8"));
            System.out.println(new String(decodedString));
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

对于Java 6：

import java.io.UnsupportedEncodingException;
import org.apache.commons.codec.binary.Base64;

public class Main {

    public static void main(String[] args) {
        try {
            byte[] name = Base64.encodeBase64("hello World".getBytes());
            byte[] decodedString = Base64.decodeBase64(new String(name).getBytes("UTF-8"));
            System.out.println(new String(decodedString));
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

Base64字符串到java中的byte []

1 个答案: