我正在使用下面的代码,但它不起作用。

String source = "password"; 
byte[] byteArray = source.getBytes("UTF-16"); 
Base64 bs = new Base64(); 
//bs.encodeBytes(byteArray); 
System.out.println(bs.encodeBytes(byteArray)); 
//bs.decode(bs.encodeBytes(byteArray));
System.out.println(bs.decode(bs.encodeBytes(byteArray)));

当前回答

类似的

String source = "password"; 
byte[] byteArray;
try {
    byteArray = source.getBytes("UTF-16");
    System.out.println(new String(Base64.decode(Base64.encode(byteArray,
           Base64.DEFAULT), Base64.DEFAULT)));
} catch (UnsupportedEncodingException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

其他回答

加密:

byte[] encrpt= text.getBytes("UTF-8");
String base64 = Base64.encodeToString(encrpt, Base64.DEFAULT);

解密:

byte[] decrypt= Base64.decode(base64, Base64.DEFAULT);
String text = new String(decrypt, "UTF-8");

2021年在Kotlin回答。

编码:

val data: String = "Hello"
val dataByteArray: ByteArray = data.toByteArray()
val dataInBase64: String = Base64Utils.encode(dataByteArray)

解码:

val dataInBase64: String = "..."
val dataByteArray: ByteArray = Base64Utils.decode(dataInBase64)
val data: String = dataByteArray.toString()

以上的许多答案对我来说都不适用,其中一些并没有以正确的方式处理异常。在这里我添加了一个完美的解决方案,对我来说是惊人的,对你也一样。

//base64 decode string 
 String s = "ewoic2VydmVyIjoic2cuenhjLmx1IiwKInNuaSI6InRlc3RpbmciLAoidXNlcm5hbWUiOiJ0ZXN0
    ZXIiLAoicGFzc3dvcmQiOiJ0ZXN0ZXIiLAoicG9ydCI6IjQ0MyIKfQ==";
    String val = a(s) ;
     Toast.makeText(this, ""+val, Toast.LENGTH_SHORT).show();
    
       public static String a(String str) {
             try {
                 return new String(Base64.decode(str, 0), "UTF-8");
             } catch (UnsupportedEncodingException | IllegalArgumentException unused) {
                 return "This is not a base64 data";
             }
         }

对于在这里结束搜索关于如何解码用Base64.encodeBytes()编码的字符串的信息的任何人,这是我的解决方案:

// encode
String ps = "techPass";
String tmp = Base64.encodeBytes(ps.getBytes());

// decode
String ps2 = "dGVjaFBhC3M=";
byte[] tmp2 = Base64.decode(ps2); 
String val2 = new String(tmp2, "UTF-8"); 

此外,我支持旧版本的Android,所以我使用Robert Harder的Base64库http://iharder.net/base64

类似的

String source = "password"; 
byte[] byteArray;
try {
    byteArray = source.getBytes("UTF-16");
    System.out.println(new String(Base64.decode(Base64.encode(byteArray,
           Base64.DEFAULT), Base64.DEFAULT)));
} catch (UnsupportedEncodingException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}