概念
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示例一
org.apache.httpcomponents httpclient 4.5.6
重慶分公司
重慶分公司
public static void main(String[] args) throws UnsupportedEncodingException {
String str = "PERJVj53d2RhZGZhZGYgYXNkZmFzZiBhc2Zhc2QgZnNhZGZmYTwvRElWPg==";
String decodeStr = new String(Base64.decodeBase64(str),"GBK");
System.out.println(decodeStr);
}示例二
// 項目 www.1b23.com
public class Base64 {
private static final char[] S_BASE64CHAR = {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', '+', '/'
};
private static final char S_BASE64PAD = '=';
private static final byte[] S_DECODETABLE = new byte[128];
static {
for (int i = 0; i > 4 & 0x3);
return 1;
case 2:
obuf[wp++] = (byte)(b0 <<2 & 0xfc | b1>> 4 & 0x3);
obuf[wp] = (byte)(b1 <<4 & 0xf0 | b2>> 2 & 0xf);
return 2;
case 3:
obuf[wp++] = (byte)(b0 <<2 & 0xfc | b1>> 4 & 0x3);
obuf[wp++] = (byte)(b1 <<4 & 0xf0 | b2>> 2 & 0xf);
obuf[wp] = (byte)(b2 <<6 & 0xc0 | b3 & 0x3f);
return 3;
default:
throw new RuntimeException("Internal Errror");
}
}
public static byte[] decode(String data) {
char[] ibuf = new char[4];
int ibufcount = 0;
byte[] obuf = new byte[data.length()/4*3+3];
int obufcount = 0;
for (int i = 0; i public static void main(String[] args) throws UnsupportedEncodingException {
String str = "PERJVj53d2RhZGZhZGYgYXNkZmFzZiBhc2Zhc2QgZnNhZGZmYTwvRElWPg==";
String decodeStr = new String(Base64.decode(str),"GBK");
System.out.println(decodeStr);
}
名稱欄目：base64實現解碼轉化的方法
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