base64解密后的数组怎么变短了
publicstaticbyte[]decode(byte[]input,intoffset,intlen,intflags){//Allocatespaceforthe...
public static byte[] decode(byte[] input, int offset, int len, int flags) {
// Allocate space for the most data the input could represent.
// (It could contain less if it contains whitespace, etc.)
Decoder decoder = new Decoder(flags, new byte[len*3/4]);
if (!decoder.process(input, offset, len, true)) {
throw new IllegalArgumentException("bad base-64");
}
// Maybe we got lucky and allocated exactly enough output space.
if (decoder.op == decoder.output.length) {
return decoder.output;
}
// Need to shorten the array, so allocate a new one of the
// right size and copy.
byte[] temp = new byte[decoder.op];
System.arraycopy(decoder.output, 0, temp, 0, decoder.op);
return temp;
}
这是Base64的源码.可以看到第四行 new byte[len*3/4]把长度变成了*3/4.我本来解密前的byte数组长1024.解密后就变成了758,数据丢了.怎么解决这个问题??? 展开
// Allocate space for the most data the input could represent.
// (It could contain less if it contains whitespace, etc.)
Decoder decoder = new Decoder(flags, new byte[len*3/4]);
if (!decoder.process(input, offset, len, true)) {
throw new IllegalArgumentException("bad base-64");
}
// Maybe we got lucky and allocated exactly enough output space.
if (decoder.op == decoder.output.length) {
return decoder.output;
}
// Need to shorten the array, so allocate a new one of the
// right size and copy.
byte[] temp = new byte[decoder.op];
System.arraycopy(decoder.output, 0, temp, 0, decoder.op);
return temp;
}
这是Base64的源码.可以看到第四行 new byte[len*3/4]把长度变成了*3/4.我本来解密前的byte数组长1024.解密后就变成了758,数据丢了.怎么解决这个问题??? 展开
1个回答
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