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Copy pathCode.java
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executable file
·62 lines (52 loc) · 1.91 KB
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package array;
/**
* 自定义的英文和数字转码(在索引中找到值，固定位置转移)
*/
public class Code {
private static char[] base64EncodeChars = new char[]{'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 final static int offSize = 3;
public static void main(String[] args) {
String value = "yahier";
value = addIndex(value);
System.out.println("增加偏移量后的数据:" + value);
value = subIndex(value);
System.out.println("减少偏移量后的数据:" + value);
}
/**
* 获取增加偏移量后的值
*/
private static String addIndex(String str) {
StringBuffer sb = new StringBuffer();
char[] data = str.toCharArray();
for (int i = 0; i < data.length; i++) {
for (int j = 0; j < base64EncodeChars.length; j++) {
if (base64EncodeChars[j] == data[i]) {
sb.append(base64EncodeChars[j + offSize]);
continue;
}
}
}
return sb.toString();
}
/**
* 获取减少偏移量后的值
*/
private static String subIndex(String str) {
StringBuffer sb = new StringBuffer();
char[] data = str.toCharArray();
for (int i = 0; i < data.length; i++) {
for (int j = 0; j < base64EncodeChars.length; j++) {
if (base64EncodeChars[j] == data[i]) {
sb.append(base64EncodeChars[j - offSize]);
continue;
}
}
}
return sb.toString();
}
}